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15 Top JavaScript Development Companies [2024]

Last updated on
January 11, 2024



15 Top JavaScript Development Companies [2024]

Top JavaScript development companies - shortlist

You most likely noticed, that there are no numbers here. That's because there's no universally best choice.

Companies offer different solutions, approaches, and services, and you need to pick the top provider of JavaScript development services - the one that fits your needs best. Analyzing the diagrams below will help you do that.

Comparison nr 1: characteristics of each JavaScript development company

Let’s compare the basic facts about the best JavaScript companies mentioned in this toplist - their maturity expressed by the years on the market, and their team sizes. In our opinion, these are not the aspects that should critically influence your decision, but they are important especially in the case of big projects - and by big, we mean both huge budgets and demand for a big team.

Years on the market

Compare top JavaScript development companies by analyzing their maturity.

Companies that are present on the market for some time now, have a lot of experience. That fact most likely translates into the maturity of their processes and the way they organize the cooperation. They most probably have chosen their favorite industries and gained a lot of experience in these fields.

The fact that a company is young doesn't mean there are no experts and senior engineers there. Their maturity in terms of processes or joint experience in a particular industry can be lower. Younger companies often have a fresh look and are not opinionated.

Team size

Compare top JavaScript development agencies by analyzing their team size.

Here a lot depends on the company and their culture.

A big team means many developers on board, but also many projects ongoing simultaneously. If the company maintains sufficient buffer and they don't require a lot of paperwork and formalities before starting the cooperation, they will be able to kick off the project fairly quickly.

Unfortunately, often they do require formalities, and it slows the process down significantly. Also, many clients and ongoing projects create a possibility of favoring the biggest and most profitable ones. 

It's no secret that smaller companies often care more. They want to prove their skills and expertise. They work in a more agile way and there are no stiff procedures. Many formalities can be skipped or done quicker. Small companies are also able to approach the partnership in a more personalized way, for example, when it comes to building the team.

Assessing that, you need to look closely at the company's culture. These are the most frequent cases, but of course, there are exceptions to this rule.

Comparison nr 2: culture and attitude of top JavaScript development companies

Most toplists guarantee you reviews and general information about the company's services. And this information is crucial, there's no doubt (especially the reviews). But what about the company's attitude to deliver products?

After all, that's one of the most important factors influencing the decision of choosing a vendor. How they support you, what are their actions to fully understand and deliver value for your business. Don't worry, you don't need to research these things on your own - we've got you covered.

How did we assess the companies' attitude?

We've analyzed how each of the companies engaged in the past projects, and what clients are saying about them in reviews and testimonials. We've also looked at how the particular company writes and talks about themselves on their website, blog, and social media channels, assessing their brand and culture.

Here are the results.

Business-success approach

Compare top JavaScript development companies by analyzing their business-success approach.

Understanding your vision and business goals don't necessarily mean the company does everything to support the success of your business with the product they deliver or co-create.

The bigger attention they put to providing you with business support, the better chance the final product will be successful.

How does it manifest? For example, when a business analyst is present on the project from the very beginning. When developers have proper knowledge or support and mentoring from tech leaders, advisors, and business analysts. 

And most importantly, when the boundaries between business and development are smashed. When you share and exchange knowledge openly. And when they have enough knowledge and confidence to challenge your vision and advise what you could do better.

Consultancy attitude

Compare top JavaScript development agencies by analyzing their consultancy attitude.

The consultancy attitude is not only about providing consulting services. It boils down to sharing knowledge with you and your team on an everyday basis.

You make your processes better with their help, and your team gains a lot of technical knowledge. It can also apply to product strategy, design, agile methodology in practice, growth of your developers.

And after the cooperation ends, you and your team end up skilled enough to be able to continue without them.

They are open to helping you with that transition from the very beginning? You've found your perfect partner.

DevOps abilities

Compare top JavaScript development companies by analyzing their DevOps abilities.

When we say DevOps you most likely think about the Cloud and some difficult terms like continuous deployment. It would implicate that DevOps is a convenience, but it's not.

DevOps is a culture.

That allows for smashing the boundaries between developers and operations which makes the cooperation smooth, speeds up the development process, and allows for creating better products because there are no knowledge silos within a team.

Best JavaScript companies operating in line with DevOps culture offer multidisciplinary teams, increased transparency, and collaboration between each part of the team. Frequent and high-quality releases increase the satisfaction of developers - and subsequently, users of the product.  

The company that works in line with DevOps culture and is eager to share knowledge with its partners is pure gold. You can improve your processes a lot by working with them.

Time to impact

Compare top JavaScript development companies by analyzing their time to impact.

Time to impact depends on:

  • how the company manages its resources,
  • how many formalities they need before they can start,
  • and how much time do they need for onboarding.

It's important how a company composes teams. If they offer the support of tech advisors or tech leaders, these roles can seriously speed up their time to impact.

The ability to make an impact quickly can also be influenced by the way the company organizes projects (working in Agile methodology results in fast iterations and fast improvements of your product) and the fact that they organize workshops. There are various types of workshops, where you can, for example, analyze and research your product, and look for possible improvements.

Ownership attitude

Compare top JavaScript development companies by analyzing their ownership attitude.

Not being afraid to take full responsibility means the company is confident, most likely experienced, and that they are fully aware mistakes can happen. And what distinguishes them, is the attitude to these mistakes. They won’t be intimidated by them. They will fix them and learn from them.

That kind of attitude reflects in more transparency and better communication. They have nothing to hide because they own their mistakes.

Partnership attitude

Compare top JavaScript development companies by analyzing their partnership attitude.

A true partnership means sinking into your team, truly being a part of it, and considering your success a mutual success. 

The opposite? Traditional outsourcing, when you delegate a task to an external partner and they just deliver. 

Think about what’s better for you. It will most likely depend on your project. However, in the case of more traditional outsourcing, pay attention to choosing a partner that provides full transparency and open, flawless communication.

Top software development companies specializing in JavaScript - details

Let's proceed to the details about every company from this toplist.

You'll find here crucial aspects of each company's offer, like services, projects in portfolios, and skills. 

Details about clients’ reviews and industries they’re especially experienced with will help you to filter the candidates. You can also read about each company's culture because it’s helpful to share similar values while working on the project.

Brainhub - a top JavaScript app development company

Brainhub is one of the best JavaScript development companies.

Brainhub differentiates itself as an exceptional JavaScript development service provider due to their remarkable technological proficiency. Their main focus is on providing digital acceleration and team augmentation solutions. They collaborate with a diverse range of businesses, including emerging scale-ups, startups, and established enterprises.

To secure the delivery of exceptional software, Brainhub follows an approach that prioritizes rapid iterations and comprehensive testing. This strategic method empowers them to consistently bring tangible business benefits through their outstanding software solutions.

SERVICES: web development, mobile development, UX/UI design, desktop development, digital product development, staff augmentation, digital transformation

SKILLS: designers, developers, QA specialists, business analysts, tech advisors, JavaScript developers, TypeScript, Node.js, React.js, React Native, NestJS, Golang, Electron.js, GraphQL, Kubernetes, hybrid mobile app development, PWAs, scrum masters, agile coaches, architects, fintech UX design & development, game dev tool design & development, edtech app design & development, medtech app design & development

PORTFOLIO:  National Geographic, Paradox Interactive, TC Global, Collegial, Beam, Jackbox Games, Screencloud, Heist Studios, Venture Harbour, Medicover GO

REVIEWS: 4.9 stars on Clutch from 38 reviews. 

WHAT CLIENTS APPRECIATE: technical knowledge, quality of the code, proactive attitude, project management abilities, transparency, engagement, dedication, businesslike approach.

CULTURE & VALUES: The team believes in ownership and proactive behavior. The company values the consultancy attitude - engaging in the full business process and solving problems together through excellent communication. They cherish making educated decisions. The team also values cooperation, ownership, consistent growth, and loves sharing knowledge.

METHODOLOGY: Agile methodology




<span class="colorbox1" fs-test-element="box1">By the way, that's us! If you want to consult your JavaScript project, drop us a message.</span>

Brainhub is one of the best JavaScript development companies.

<h3 id="10clouds"> 10Clouds </h3>

10Clouds is one of the top JavaScript development companies.

10Clouds is a JavaScript app development company founded in 2009, specialized in FinTech and Blockchain software development. They provide end-to-end product development as well as staff augmentation. They were named one of the Europe's Fastest Growing Companies by Financial Times, listed among Deloitte 50 Fastest Growing in CEE, and among top 100 companies globally by Clutch.

SERVICES: web development, mobile development, web design, product design, UX design, DevOps services, MLOps services, blockchain

SKILLS: developers, designers, QA specialists, product delivery managers, blockchain, machine learning, React.js, Angular, React Native, Node.js, Vue.js, Swift, Flutter, Kotlin, Python, Elixir

PORTFOLIO: Asmodee, StepStone, Baidu, TrustStamp, Forbes, Skedulo, Swile, Coinquista

REVIEWS: 4.9 stars on Clutch from 57 reviews

WHAT CLIENTS APPRECIATE: transparency, cost-consciousness, engagement, flexibility, dedication, effective workflow and project management, code quality, professionalism.

CULTURE & VALUES: They believe that mutual, constructive feedback is a vital part of showing appreciation and feeds the values of humanism and progress. They believe that recognizing and celebrating achievements increases happiness and engagement. Care and appreciation are their main company culture virtues that keep the team powerful and united.

METHODOLOGY: Agile methodology


LOCATION: Poland, Warsaw (HQ), Poznan, Wroclaw

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: FinTech, banking, EduTech, HealthTech, IT, business services

10Clouds - range of services

<h3 id="neoteric"> Neoteric </h3>

Neoteric is one of the best JavaScript companies.

Neoteric is a JavaScript development agency founded in 2005. The team helps companies build new products, grow existing ones, and introduce AI to their businesses. Design Rush put them on the list of the best technology experts to hire in 2021, and Clutch listed them among Top Artificial Intelligence Companies 2021 and Top Web Developers 2021. They focus on Artificial Intelligence-related projects.

SERVICES: web development, product design, AI development

SKILLS: developers, designers, scrum masters, artificial intelligence, machine learning, workshops, Angular, React, Node.js, Nest.js

PORTFOLIO:  Siemens, Nestle, The World Bank, Liveramp, Appoint.ly

REVIEWS: 4.9 stars on Clutch from 38 reviews. 

WHAT CLIENTS APPRECIATE: professionalism, communication skills, proactive attitude, transparency, accountability, engagement.

CULTURE & VALUES: The company promotes a culture of freedom and responsibility. Team members take full ownership of their goals. They treat one another as family members, value the freedom of employees to choose the best solutions, and responsibility which naturally arises on that. The company thinks that growing personally and supporting one another as a team are crucial.

METHODOLOGY: Agile methodology


LOCATION: Poland, Gdańsk

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: business, IT, supply chain, logistics, transport, telecommunications. 

Neoteric - Range of services

<h3 id="txi"> TXI </h3>

TXI is one of the best javascript development companies.

Table XI is a JavaScript software development company founded in 2002. They partner with clients from startups to Fortune 100. They pride themselves of being industry-agnostic. Clutch recognized them as on of the top software development leaders, top Ruby on Rails developers, and top developers from Chicago.

SERVICES: custom web development, mobile development, digital strategy and project management, product design, UX design, workshops

SKILLS: IoT, user research, UX design, branding, business strategy, project management, React Natve, JavaScript, Ruby on Rails, DevOps, maintenance, hosting, native app development, cross-platform app development, user testing, user research

PORTFOLIO: Dept. of Medicine, Northwestern University, Outcome Health, Journal for the American Medical Association (JAMA), AKARA, Abbvie, Tyson Foods, Ocean Spray, AccuWeather, Frommer's, Discover Financial, Dickson, Field Museum

REVIEWS: 4.9 stars on Clutch from 42 reviews

WHAT CLIENTS APPRECIATE: communication skills, structure of the development process, skilled expertise, flexibility, collaborativeness, creativity, ability to synthesize information, collaboration, responsiveness, proactivity, willingness to learn, accessibility.

CULTURE & VALUES: Their motto is the tech done right - right for the users, right for the client and right for the community. They value close collaboration and trust. Team members believe in constantly learning. They take care of their people and their families, so everyone can keep growing and learning. They believe in diversity and inclusivity.

METHODOLOGY: Agile methodology



INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: EdTech, healthcare, manufacturing & IoT, retail & e-commerce, media.

TXI - Range of services

<h3 id="monterail"> Monterail </h3>

Monterail is one of the best JavaScript development companies.

Monterail is a JavaScript web and mobile development company founded in 2010. They're experts in JavaScript, Ruby on Rails, and Python. They provide full interdisciplinary teams, and the support of tech leaders. They have been listed in the Clutch Top 1000 companies in 2021, in the Financial Times 1000 rank twice in a row (2018 & 2019). They were also recognized by Deloitte as one of the fastest growing tech companies in Central Europe (2016 & 2017). They work 100% remotely.

SERVICES: web development, mobile development, product design, MVP development

SKILLS: developers, designers, QA specialists, business analysts, JavaScript, Node.js, Vue.js, React, Angular, React Native, Ruby on Rails, Python, Elixir, Golang, machine learning, hybrid mobile app development, PWA development, IoT development

PORTFOLIO:  Pizza Hut, Morizon, Merck, Solarflare, Cooleaf, Loyco, Admyt, Tailored, GiveDirectly, Seat Unique, University of Wroclaw, Xchanging, Teambook, WFC, Innovestment, Extradom, Easyship, Kastio

REVIEWS: 4.8 stars on Clutch from 34 reviews

WHAT CLIENTS APPRECIATE: responsiveness and work organization, high quality of work, reliability, flexibility, being supportive, providing a holistic service, thorough understanding of the client's needs and problems, collaborative and dynamic attitude.

CULTURE & VALUES: Monterail is a place for builders, creators, and makers who provide solutions to other people's problems and when in doubt, figure things out collectively. They embrace responsibility, discipline, and keeping the promises. They build their relationships with clients and other team members on trust. They perceive their mistakes as learning experience and value knowledge sharing.

METHODOLOGY: Agile methodology


LOCATION: Poland, Wroclaw

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: PropTech, FinTech, MedTech, e-commerce, HR software, retail, business services, EdTech.

Monterail - range of services

<h3 id="miquido"> Miquido </h3>

Miquido is one of the top JavaScript development companies.

Miquido is a JavaScript app development company founded in 2011. They pride themselves of providing complex 360° services. The company was recognized by Deloitte Technology Fast 50 2016 as the fastest growing mobile development company in CEE. Their a Google Certified Agency, covered by Time & Forbes, and named Top Mobile App Development Company in the UK.

SERVICES: product design, web development, mobile development, Artificial Intelligence, product strategy, digital transformation, legacy modernization, Proof of Concept, innovation research, UX/UI design, UX workshops, UX audit, Cloud deployment

SKILLS: designers, developers, project managers, JavaScript, Angular, React, Node.js, Golang, Java, Flutter, Swift, Kotlin, TypeScript, Kubernetes, native mobile app development, cross-platform mobile app development, Artificial Intelligence, Machine Learning, Data Science, Computer Vision, AWS, Google Cloud Platform, cloud app development, cloud deployment, UX design, UI design, Business Intelligence, product strategy, workshop, NLP, market research, prototyping, PoC

PORTFOLIO:  Skyscanner, Abbey Road Studios, BNP Paribas, Santander Bank, Herbalife, Play, TUI, Empik, Onkyo Music, HelloFresh, Pando, Klassik Radio, HID, Nestle, Aviva, AXA, SBAB, Nextbank

REVIEWS: 4.8 stars on Clutch from 36 reviews

WHAT CLIENTS APPRECIATE: reliability, flexibility, consistency, quick turnaround time, ability to onboard rapidly, versatile range of skills and capabilities, transparency, communication skills, commitment, work ethic.

CULTURE & VALUES: They value transparency and honesty - also in terms of telling the client why their vision won’t translate into business success and advising better solutions. Delivering business value is crucial for the company. They put people first, along with their personal growth, competence development, and overall satisfaction.

METHODOLOGY: Agile methodology


LOCATION: Poland, Cracow

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: FinTech (banking, insurance), e-commerce, MedTech, entertainment.

Miquido - Range of services

<h3 id="rootstrap"> Rootstrap </h3>

Rootstrap is among the top JavaScript development companies.

Rootstrap is a software development company founded in 2011. They were awarded Americas’ Fastest-Growing Companies of 2020 and 2021 by Financial Times, America’s Fastest-Growing Companies of 2019, 2020 by INC 5000, and named #4 Best Machine Learning Developers in 2021. The team helps companies scale people, processes, and products.

SERVICES: web development, mobile development, UI/UX design, data science, machine learning, product strategy, staff augmentation, technical workshops

SKILLS: AR/VR, artificial intelligence, blockchain, cryptocurrency, chatbots, ML/deep learning, Ruby, Node.js, native mobile app development, DevOps,  quality assurance

PORTFOLIO:  MasterClass, MasterClass, Google, Salesforce, Universal Music Group, FanBread, Cash Money Records, Spotify, Snoop Dogg, CES, Disney, Tony Robbins, Microsoft, Epson

REVIEWS: 4.8 stars on Clutch from 33 reviews. 

WHAT CLIENTS APPRECIATE: flexibility, sense of ownership, transparency, communication skills, excellent workflow, expertise, integration with the internal team.

CULTURE & VALUES: The company values the discipline of continuous improvement and growth. They are open to new ideas, embrace change and ownership. Team members are caring and respectful towards one another and towards clients. They call themselves the seekers of understanding and truth, empathizing with clients and working constructively to find the best solutions to their challenges. 

METHODOLOGY: Agile methodology


LOCATION: USA (Los Angeles, CA - HQ), Uruguway (Montevideo), Argentina (Buenos Aires)

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: business services, consumer products and services, edtech, IT.

<h3 id="kind_geek"> KindGeek </h3>

KindGeek is one of the best JavaScript development companies.

KindGeek is a software development company founded in 2013. In October 2021, KindGeek was rated among the world’s 30 best custom software development companies by DesignRush. Design Rush also recognized the company among the top 3 FinTech software development companies. Clutch featured KindGeek among top design companies and top mobile app developers 2021.

SERVICES: web development, mobile development, product design, DevOps services, software architecture design, UX/UI design, Product Management as a Service, business consulting, feasibility study

SKILLS: developers, designers, DevOps, Quality Assurance, UX audit, product discovery, UX design, UI design, JavaScript, Angular, React.js, Vue.js, Node.js, Java, .NET, PHP, MySQL, PostgreSQL, MongoDB, Oracle, Flutter, Firebase, Swift, Kotlin, Objective C, Data Science, Cloud technologies, BlockChain, business analysis

PORTFOLIO:  University of Basel, Telefonica, Puls, TradeShift, Hive Social, Innovid, Lehrermarktplatz, Place B, UBA, Unique Digital Cinema, TUI

REVIEWS: 4.8 stars on Clutch from 46 reviews

WHAT CLIENTS APPRECIATE: communication skills, tech skills, project management skills, flexibility, collaborative and effective approach, attentiveness to client’s needs, responsiveness to feedback, reliability, delivering on time.

CULTURE & VALUES: KindGeek team highly values trust. In their opinion, there’s no growth without honest feedback. Company values being socially responsible in terms of employees caring about their colleagues well-being, as well as being citizens. They also appreciate the sense of beauty and strive to create products that are visually appealing. They value team spirit and the quality of delivered work.

METHODOLOGY: Agile methodology


LOCATION: Ukraine, Lviv

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: healthcare, education, eLearning, media, FinTech, e-commerce.

<h3 id="diceus"> Diceus </h3>

Diceus is one of the top JavaScript development companies.

Diceus is a custom software development company founded in 2011. They offer both staff augmentation and end-to-end product development. The company was mentioned by TopDevelopers.co among the top .NET Developers of 2021, The Manifest recognized them as one of the most reviewed IT services companies. They were also listed among the top B2B software development firms 2021 by Clutch.

SERVICES: custom software development, web app development, mobile app development, UI/UX design, data migration services, desktop app development, website development, IT consulting and audit

SKILLS: React.js, Node.js, Vue.js, Angular.js, Golang, Flutter, Java, .NET, Python, PHP, Ruby, Objective.C, developers, designers, architects, QA and test engineers, business analysts, project managers, DevOps, Artificial Intelligence, Machine Learning, blockchain, big data, cloud solutions, data science, cross-platform apps

PORTFOLIO:  Willis Towers Watson, Bridgestone, Bank al Etihad, Verisense, Lean Business Services, BriteCore, BenefitNet, Riskville, WebSpin360, Insubiz, Crowdsurfr, NextCom

REVIEWS: 4.8 stars on Clutch from 40 reviews

WHAT CLIENTS APPRECIATE: responsiveness, professionalism, and organizational skills, result-oriented approach, effective communication, expertise, timely reporting, commitment and dedication.

CULTURE & VALUES: The team strives to bring as many values as possible to the clients and users, with the right technology and people. Their mission is to deliver high quality, and the expertise in various industries along with a quality-driven delivery model helps them to do so.

METHODOLOGY: Agile methodology


LOCATION: Ukraine, Kyiv, Denmark, Hellerup, Lithuania, Alytus, USA, New York City

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: banking, FinTech, insurance, logistics, retail, healthcare, automotive, IT, telecommunications, e-commerce.

<h3 id="tsh"> The Software House </h3>

The Software House is one of the top JavaScript service providers.

The Software House is a software development company founded in 2012. The team specializes in building and scaling up software development teams with experts. Clutch named The Software House the most highly-recommended software development company in Poland in 2020.  Other awards: Financial Times 1000, Deloitte Fast50, ComputerWorld Top200. 

SERVICES: web development, mobile development, product design

SKILLS: developers, designers, cloud development, devops, quality assurance, React, Angular, Vue, PHP, Node.js, software architecture, microservices

PORTFOLIO:  eSky.com, Takamol, Smartum, WieBetaaltWat, Synerise, Worldwide101, SpeakersCorner, Prisma

REVIEWS: 4.8 stars on Clutch from 51 reviews.

WHAT CLIENTS APPRECIATE: flexibility, efficiency, ability to adapt, experience, reliability, communication skills, knowledge.

CULTURE & VALUES: The company believes in people and their satisfaction as the company's greatest asset. They value growth and learning, open communication, and high engagement. The openness to one another is the basis of their relations with clients. The team believes that a broad perspective allows them to spot potential and real problems ahead of time.

METHODOLOGY: Agile methodology


LOCATION: Poland (Gliwice - HQ, Kraków), The Netherlands (Amsterdam)


<h3 id="spro"> S-Pro </h3>

S-Pro is one of the best JavaScript companies in the world.

S-Pro is a software development and consulting company founded in 2014. They specialize in FinTech. They partner with accelerators like Founder Institute, Sente.Link, BCCS Cluster. The company was recognized a Clutch Global Top 1000 Company in 2021 and as one of the top development companies from Ukraine. They were also recognized as One of the Most Reviewed Blockchain Companies in Ukraine by The Manifest.

SERVICES: product discovery services, product design, web development, custom software development

SKILLS: blockchain, API development, Artificial Intelligence, Machine Learning, Ux design, UI design, architecture, PoC, infrastructure engineering, MVP, product migration strategy, quality assurance, React.js, Angular.js, Node.js, Python, Java, Golang, PHP, Laravel, Firebase, React Native, Flutter, Swift, Kotlin, Big Data, cloud, DevOps, branding, cloud engineering

PORTFOLIO: MeterQubes, Hubspring, TSO Chinese Delivery, Climate Drops, PolarPro

REVIEWS: 4.9 stars on Clutch from 32 reviews

WHAT CLIENTS APPRECIATE: outstanding ability to deliver, professional yet friendly communication, responsiveness, being a reliable partner, energetic approach, excellent project management, engagement, passion, commitment, personal approach, flexibility.

CULTURE & VALUES: One of the company’s values is focusing on continuous improvement and thirst for knowledge. They proud themselves of having a product mindset. They cherish high-quality and innovative approach to work.

METHODOLOGY: Agile methodology


LOCATION: Ukraine, Kyiv

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: FinTech, HealthCare, Renewable Energy, hospitality, logistics&transportation, manufacturing, hi-tech

<h3 id="xfive"> Xfive </h3>

Xfive offers top JavaScript development services.

Xfive is a digital product agency founded in 2005. Clutch listed them among top developers from Poland 2021 and top web development companies in 2020. They were recognized among top businesses by The Manifest. Xfive belongs to an X-Company ecosystem, along with XHQ, X-Team and XWP (they usually operate as separate entities, but share knowledge and resources).

SERVICES: digital product development, web development, website development, product design, business strategy

SKILLS: designers, developers, project managers, React.js, Angular.js, Vue.js, Node.js, PWA, Ruby on Rails, AWS, Python, UX design, UI design, branding, business strategy, discovery

PORTFOLIO:  Yanmar, OECD, SmartRecruiters, Inc., Departments of UC Berkeley, Chargebee, IWSC International Wine & Spirit Competition, MPIRICA Health, Inc., Ironclad, Boston Software

REVIEWS: 4.9 stars on Clutch from 32 reviews

WHAT CLIENTS APPRECIATE: communication skills, transparency, responsiveness, quick turnaround time, dedication, project management skills, attention to detail, meeting deadlines and pricing estimates

CULTURE & VALUES: They say their culture is a culture of trust. It’s indispensable since the team is distributed around the world and mostly work remotely. Trust, care, and friendship combined with our full transparency and professional standards of delivering projects it’s how they work with clients.

METHODOLOGY: Agile methodology


LOCATION: Poland (Cracow), USA (San Fransisco), Australia (Melbourne)

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: e-commerce, advertising and marketing, FinTech, EdTech, Medtech.

<h3 id="simbir_soft"> SimbirSoft </h3>

SimbirSoft is one of the top JavaScript development companies.

SimbirSoft is a custom software development company founded in 2001. They were named the best global software development company by “Corporate America” in 2016 and the 3rd best web developers/integrators in Russia by Tagline analytical agency in 2020. More than 1200 staff members of Simbirsoft work daily on 190 projects. 

SERVICES: custom software development, mobile development, web development, desktop development, client server systems development

SKILLS: C#, C++, Go, Java, JavaScript, PHP, Python, Swift, Kotlin, Flutter, quality assurance 

PORTFOLIO: Kimberly-Clark Corp, Gehtsoft LLC, Matsushita Corp, 3NF Corporation, the World Bank, ABBYY

REVIEWS: 4.9 stars on Clutch from 55 reviews.

WHAT CLIENTS APPRECIATE: the ability to build a reliable partnership and quickly provide assistance in critical situations, performance, high quality of work, professionalism, expertise, problem-solving abilities, responsibility, and proactivity.

CULTURE & VALUES: The company puts value on the careful selection of employees for a particular project. They always seek innovative solutions, delivering on time and providing a clear, transparent workflow. Their mission is to simplify business management and software development.

METHODOLOGY: Agile methodology


LOCATION: Russia (Moscow, Kazan, Ulyanovsk), USA (Lexington, MA)

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: business services, FinTech, IT, energy and natural resources, MedTech, EdTech, retail, telecommunications, service, insurance, management.

<h3 id="geeky_ants"> GeekyAnts </h3>

GeekyAnts is one of the best JavaScript companies.

GeekyAnts is a design and development studio founded in 2006. They offer dedicated teams and end-to-end product development. They specialize in web and mobile development. GeekyAnts is the brains behind React Native's UI library NativeBase. They are Google's official service providers and authors of Flutter's official documentation. They developed a crash course for programmers as an employment initiative.

SERVICES: UX/UI design, API development, web app development, mobile app development, consulting

SKILLS: React.js, Angular, Flutter, Svelte, Golang, Node.js, React Native, Laravel, Python, Vue.js, TypeScript, Firebase, AWS, GraphQL, Next.js, Express, microservices, cross-platform apps, UX research, branding, UX design, UI design, DevOps, project management, business analysis, quality assurance, delivery&support, MVP

PORTFOLIO:  Siveco Romania, ChildMind Institute, Tellius, PayPoint, QuinType, EndLink, Mobile Premier League, Lamno, Cloud9, Khatabook

REVIEWS: 4.8 stars on Clutch from 45 reviews

WHAT CLIENTS APPRECIATE: understanding the business objectives, high-quality work, seamless project management, commitment, proactivity, transparency, ownership, collaborative attitude, addressing feedback professionally and in timely manner.

CULTURE & VALUES: Constant learning and sharing of experiences amongst the team and the communities is one of the company’s core values. Transparency and communicating things on time are the basis of their teamwork. They bet on constant feedback sessions and one-on-one meetings to maintain and open-door policy and face problems ahead of time. They also value the quality of their work and strive to perfection.

METHODOLOGY: Agile methodology


LOCATION: India (Bangalore), US (California), UK (London)

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: healthcare, finance, education, banking, gaming, manufacturing, real estate, e-commerce.

<h3 id="binary_studio"> Binary Studio </h3>

Binary Studio is one of the best JavaScript companies.

Binary Studio is a custom software development company founded in 2005. They offer full-cycle product development and dedicated development teams. Clutch listed them among top web development companies in 2021. They’re a certified partner of Amazon, Microsoft, and MongoDB. The company focuses on establishing strategic partnerships with SMBs. More than 50% of their developers come from their annual Academy program, which has a 0.5% acceptance-to-hire rate.

SERVICES: custom software development, mobile app development, web app development

SKILLS: React.js, Angular.js, Node.js, Vue.js, React Native, Electron, Java, PHP, Laravel, Symfony, .NET, Flutter, Machine Learning, Artificial Intelligence, Zamarin, Redux, GraphQL, TypeScript, Cloud, JavaScript, MongoDB, MySQL, MVP, PoC, design

PORTFOLIO:  MassageBook, Rydes, Hackolade, Wyldr, SnapNurse, CGHero Ltd, Agency Smart

REVIEWS: 4.9 stars on Clutch from 35 reviews

WHAT CLIENTS APPRECIATE: transparent and fast development process, high-quality code, commitment and dedication, meeting deadlines, communication skills, proactivity, understanding goals, being solution-oriented.

CULTURE & VALUES: They value transparent communication, high-quality work, and establishing a great partnership with clients. They cherish comfort and a great atmosphere at work, so their management is caring and open-minded.

METHODOLOGY: Agile methodology


LOCATION: Ukraine, Lviv (HQ), Kyiv (Development Center), UK, London

INDUSTRIES THEY'RE ESPECIALLY EXPERIENCES WITH: healthcare, FinTech, data modelling, ERP, wellness, education, gambling, IT, real estate management.

Summary - best JavaScript companies for various industries

Below you'll find a quick cheat sheet of the best companies for particular industries.

Top JavaScript development companies for FinTech

Top JavaScript development companies for EdTech

Top JavaScript development companies for eCommerce

Top JavaScript development companies for MedTech

Your next moves

Continue your research by contacting chosen companies or analyzing further toplists.

Before starting the cooperation, remember to check how the company manages the project, how they communicate, and provide the highest level of transparency.

Request the details about the company's portfolio (and contact their previous clients) and experience.

And remember, that you should be the owner of the source code - and that needs to be written in the agreement.

Pay attention to culture fit, mutual understanding, and the natural flow between you and the vendor’s team.

Good luck!

How this toplist was created?

To select the best JavaScript development companies for this toplist, we’ve analyzed rankings on Clutch, The Manifest, Goodfirms, Design Rush, and TechReviewer. Companies’ websites were thoroughly researched, along with their reviews, portfolios, and the range of services they provide. We assessed their expertise in various fields and their experience based on reviews and portfolios.

What you have here, are the best ones.

But it's also not a typical toplist.

You can compare here the companies’ attitude to deliver products, not only vague information about them.

Frequently Asked Questions

What is a JavaScript software development company?

How much does JavaScript software development cost?

Our promise

Every year, Brainhub helps 750,000+ founders, leaders and software engineers make smart tech decisions. We earn that trust by openly sharing our insights based on practical software engineering experience.


Olga Gierszal
IT Outsourcing Market Analyst & Software Engineering Editor

Software development enthusiast with 6 years of professional experience in the tech industry. Experienced in outsourcing and nearshoring market analysis. Our expert in presenting tech, business, and digital topics in an accessible way.

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