The right AWS partner turns a stressful migration into a smooth transition. Beyond just moving off legacy systems, they give you actual control over your cloud spending and ensure your architecture can handle modern AI tools without breaking a sweat.
In this ranking we compared AWS cloud modernization and implementation companies based on partnership validation, modernization approach, cost governance, industry experience, and delivery model. It’s designed to help you identify the best fit rather than the biggest name.
A QUICK SUMMARY – FOR THE BUSY ONES
The best AWS cloud migration and modernization company depends on the scale and focus of your transformation. STX Next is well suited to regulated mid-market and enterprise companies modernizing cloud infrastructure, data platforms, and AI capabilities together; Caylent is a strong fit for organizations looking for deep AWS-native engineering; while SoftServe is better suited to large, multi-region enterprise transformation programmes. When comparing providers, look at AWS expertise, modernization approach, cost governance, compliance, industry experience, and delivery model.
TABLE OF CONTENTS
We set out to answer a single practical question: which AWS partners do organizations trust to genuinely modernize production estates, rather than just migrate workloads and walk away? We looked past simple badge counts, focusing instead on partners with validated AWS expertise and a proven track record of controlling cost and risk post-launch.
Every company on this list earned its spot through demonstrated delivery maturity, deep AWS alignment, and a commitment to true modernization over simple lift-and-shift.
To make the cut, partners had to meet most of the following criteria:
STX Next is a European AWS Advanced Tier Services Partner and certified MAP partner, currently completing the technical AWS Migration Capability Review (scored on delivered projects, not proposals).
Approach & methodology STX Next openly rejects plain lift-and-shift ("moving a bad architecture to AWS relocates the problem to a more expensive address"). Their audited four-step methodology (Analyze, Prepare, Engage, Execute) covers:
Best for:
Mid-market and enterprise organizations in regulated industries that want seamless MAP funding acquisition and need to modernize their data layer alongside infrastructure.
Key strengths:
Compliance & security ISO 27001, TISAX, GDPR, hybrid DevOps for financial institutions, and support for the AWS European Sovereign Cloud.
Snapshot
Notable work
Brainhub is a cloud consulting and software engineering company founded in 2015. It specializes in modernizing software and building web, mobile and desktop products. Together with STX Next it forms an AWS Advanced Tier Services Partner with 49 active AWS certifications, 4 Professional and Specialty level architects and 21 technical certified individuals across the combined group.
The proposition is product-side modernization: taking a legacy application that customers actually use and rebuilding it on AWS without pausing the business.
Best for: Fintechs, banks and digital businesses that need scalable, high-performing customer-facing software built or rebuilt, complex technical problems solved, and cloud infrastructure optimized around the product rather than around the data centre.
Key strengths and specializations: Legacy application modernization including cloud migration, cloud engineering and DevOps, AI development, web, mobile and desktop app development, managing the full delivery process from discovery to release.
Industry expertise: Fintech, banking, education, gaming.
Locations: Gliwice, Poland, with US and EU delivery.
Key clients: PwC, National Geographic, Credit Suisse, Star Stable Entertainment.
Culture: Transparency, rigorous project governance and business-driven decisions, with unusually strict hiring: the applicant-to-hire ratio for software engineers is around 1.36%. Strong emphasis on testing, security and scalability through modularity.
Reviews: 4.9/5 [42+ reviews, Clutch]
Notable projects: Reducing manual work from hours to seconds through a custom web audit tool for Hartford Consulting; building the most popular micromobility app in Asia for a Sequoia-funded startup; improving National Geographic's application time-to-market by 450%; delivering a Nordic startup's MVP in four weeks.
The company is an AWS Advanced Tier Services Partner and AWS Cloud Operations Competency Partner, founded in 2000, with over 1,000 employees and six offices globally.
Best for: SMEs and large companies that need continuous cloud management, consistent delivery over long engagements, and measurable control of AWS spend after migration rather than another build partner.
Key strengths and specializations: Cloud operations and managed services, cloud cost optimization and Cloud Financial Management, cloud migration and modernization, DevOps, software development, AI and ML consulting, cybersecurity consulting.
Industry expertise: Insurance, finance, utilities, media, automotive, construction, healthcare, marketing, transport.
Locations: Poland (headquarters), Germany, the UK, Switzerland, the USA, Ukraine.
Key clients: The Linde Group, Credit Agricole, Volkswagen, ITV.
Culture: Outcome-based, with transparent metrics and visibility, taking ownership and prioritizing business value over technology delivery for its own sake.
Reviews: 4.7/5 [51 reviews, Clutch]
Notable projects: Reducing lead time for changes from two months to one day while cutting a client's cloud costs by 50%; building AWS savings plans for a nonprofit now saving up to 50% monthly.
The company is an AWS Premier Tier Services Partner and AWS Managed Services Provider founded in 2015, working exclusively in the AWS environment. It holds over 220 AWS certifications and ten AWS Partner of the Year awards.
Best for: Organizations all-in on AWS wanting containers and Kubernetes engineering on EKS, serverless architecture or generative AI at Premier depth, with managed services available afterwards.
Key strengths and specializations: AWS-native cloud architecture and engineering, containers and EKS, serverless, generative AI, data, security, managed services, delivered through a single-team model across disciplines rather than handed between practices.
Industry expertise: Broad, with recognized strength in SaaS, public sector and healthcare-adjacent work.
Locations: US-centred.
Culture: Focused on accelerating time to value, with an internally named "One-Organization" approach and an industry-leading customer satisfaction rating.
The company has been an AWS Premier Consulting Partner since 2014, an AWS Managed Service Provider since 2013, and an AWS Well-Architected partner since 2018. It has been named SI Partner of the Year in EMEA.
It is one of few companies holding nine AWS-attested competencies: Financial Services, Security, Machine Learning, SaaS, Data & Analytics, DevOps, Industrial Software, IoT and Migration.
Best for: Companies that want a Premier partner delivering in-region, particularly where IoT, industrial software or data analytics form part of the modernization.
Key strengths and specializations: Design and implementation of AWS-based systems and applications, data and analytics solutions, IaaS, PaaS and SaaS architecture, managed services.
Industry expertise: Financial services, industrial and manufacturing.
Locations: Europe, with North American expansion.
Culture: A long-established practice that predates the current cloud consulting boom, operating inside a large listed technology group.
Note for buyers: Sitting within a large group means commercial terms and account attention differ from an independent firm.
The company is an AWS Premier Consulting Partner and Managed Services Provider, and one of very few firms holding Premier or Gold tier status together with MSP designation across AWS, Azure and Google Cloud simultaneously. It is part of IBM, with European roots.
Best for: Organizations still weighing AWS against Azure or Google Cloud, running a deliberately multi-cloud estate, or wanting migration and managed services under one contract with platform-neutral advice attached.
Key strengths and specializations: Cloud advisory and platform selection, migration, managed services across three hyperscalers, AWS training and certification delivery.
Industry expertise: Broad European enterprise coverage, strongest in the Nordics.
Locations: Europe, within IBM.
Culture: Client feedback emphasizes engaging with business objectives first and matching them to bespoke technical solutions, with depth of AWS knowledge and integration into client teams as recurring themes.
Note for buyers: Multi-cloud breadth means less AWS-exclusive depth than the AWS-only firms here.
The company is an AWS Premier Tier Services Partner with AWS Competencies in Migration, DevOps and Financial Services, taking a full-lifecycle approach that combines cloud transformation with application engineering.
The Financial Services competency is the credential most relevant to a bank or insurer, and only a minority of partners hold it.
Best for: Financial institutions modernizing applications and infrastructure together, where the cloud programme cannot be separated from the software that has to change alongside it.
Key strengths and specializations: Cloud migration, application modernization, DevOps, cloud architecture, Well-Architected Reviews, Cloud FinOps.
Industry expertise: Financial services, plus broader enterprise digital transformation.
Locations: Europe and global delivery.
Culture: Full-lifecycle engineering positioning, oriented toward long-run transformation programmes rather than discrete projects.
Note for buyers: Positioning is broad digital engineering rather than AWS specialism, so AWS is one practice among several.
The company is a long-standing AWS Premier Tier Services Partner focused on AWS, with competencies spanning migration, security and industry-specific validations, historically including Big Data, DevOps and Marketing.
Best for: Complex migrations where AWS-verified competency in your specific technical area matters more than proximity or price.
Key strengths and specializations: AWS migration and modernization, security architecture, big data and analytics, DevOps, application development on AWS.
Industry expertise: Cross-industry, with regulated-sector migration experience.
Locations: US-centred.
Culture: A specialist AWS practice with a long delivery history and an emphasis on competency-validated capability rather than breadth of platforms.
The company is an AWS Premier Tier Services Partner and one of the largest firms in this comparison, with over 10,000 employees, 49 offices across 15 countries and more than 20,000 customer projects delivered. It operates as a team of advisors, engineers and designers rather than a pure cloud practice, which shapes what the engagement looks like.
For AWS modernization specifically, the value is scale plus innovation capability: large transformation programmes run across regions, with innovation labs and advanced analytics attached.
Best for: Global enterprises and larger mid-market companies running multi-region modernization or transformation initiatives that need advisory, engineering and design capacity under one contract.
Key strengths and specializations: Cloud migration and modernization, big data and analytics, AI and ML, IoT, cybersecurity and compliance services, digital strategy and innovation programmes, platform engineering at enterprise scale.
Industry expertise: Financial services, energy, utilities, oil and gas, manufacturing, supply chain, healthcare and life sciences, retail, high tech, automotive.
Locations: USA, Poland, Canada, UK, Germany, Sweden, Ukraine, Bulgaria, Romania, UAE, Mexico, Colombia, Chile, Italy, Spain.
Key clients: Mercedes-Benz, INDITEX, Avery Dennison, Panasonic.
Culture: Oriented toward innovation, quality and speed, with partnerships across AWS, Google Cloud, Microsoft, NVIDIA, Cisco and Salesforce, plus alliances with Databricks, Snowflake, SAP and Oracle. NPS of 84.
Reviews: 4.8/5 [Clutch].
Compliance: ISO 27001, ISO 27701, ISO 20000-1, ISO 14001, SOC 2 Type 2, SOC 3.
The company is a Nasdaq-listed engineering firm (GDYN) with eight years of enterprise AI experience and a data platform practice at its centre. It was recognized as an AWS Advanced Consulting Partner, and its Analytical Data Platform, an accelerator for analytics and insights, is listed in AWS Marketplace and has been used by several top-tier enterprise clients.
Best for: Large enterprises with existing data teams that need modern architecture built around them, particularly multi-plant manufacturers with industrial telemetry, and organizations moving agent pilots into governed production platforms.
Key strengths and specializations: Data modernization for AI, DataOps pipelines, lineage and observability, cloud-native data architecture, agentic AI platforms, industrial IoT analytics, computer vision, data-as-a-product operating models.
Industry expertise: Manufacturing, retail, financial services, payments, wealth management, technology.
Locations: Global, with US and European delivery.
Key clients: A Fortune 500 global manufacturer operating over 100 plants, a leading global payments technology company, a Fortune 500 wealth management firm.
Culture: Engineering-led and architecture-first, oriented toward enterprise-scale programmes rather than fixed-scope projects.
When evaluating AWS partners, look beyond sales pitches and marketing badges. Focus on these eight critical factors:
There is no single best AWS modernization company for every organization. STX Next is a strong fit for regulated companies that need to modernize cloud infrastructure, data platforms, and AI foundations together; Brainhub is particularly well suited to fintechs, banks, and digital businesses modernizing customer-facing applications; Caylent stands out for deep AWS-native engineering; SoftServe fits large, multi-region enterprise transformation programmes; and Future Processing is relevant when long-term cloud operations and cost control are the priority.
The most useful way to compare AWS migration and modernization partners is to start with the transformation problem. Application modernization, data platform modernization, FinOps, compliance, AI readiness, and post-migration operations require different strengths, so the best fit depends on what part of the technology estate needs to change and how much support is required after migration.
It depends far more on the complexity and state of your legacy architecture than on the partner's hourly rates. What you should lock down up front is financial accountability: the projected post-migration monthly AWS bill, who owns that estimate, and what happens if real costs exceed projections. Additionally, eligible projects can offset upfront costs significantly through AWS funding programs.
Yes. The AWS Migration Acceleration Program (MAP) offers financial support across three distinct phases:
Funding applies per workload. An existing AWS client can still qualify for isolated database or legacy application moves. The real differentiator between partners is whether they handle the heavy lifting (TCO modeling, business case submission, and fund acquisition) on your behalf.
Premier signals massive enterprise scale, but Advanced partners often offer higher flexibility and senior team focus. Tier alone does not guarantee fit for a specific project.
For specific workloads, absolutely. An AWS Competency proves Amazon has formally audited actual client projects delivered by that partner. A Financial Services or Migration Competency provides far stronger validation of relevant domain experience than a general Premier badge.
If your destination platform is already 100% AWS, an AWS-exclusive partner usually offers deeper platform engineering and specialized knowledge. If you manage a mixed estate or need unbiased architectural advice on where workloads belong (AWS vs. Azure vs. GCP), a multi-cloud partner is the better fit.
For initial discovery and advisory work, it makes little difference. However, during active modernization and build phases, lacking a 3+ hour daily overlap window creates decision bottlenecks that delay delivery. Always evaluate time zone overlap based on where the hands-on engineering team is located, not where the firm is headquartered.
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Every year, Brainhub helps founders, leaders and software engineers make smart tech decisions. We earn that trust by openly sharing our insights based on practical software engineering experience.
Authors
Software development enthusiast with 7 years of professional experience in the tech industry. Experienced in outsourcing market analysis, with a special focus on nearshoring. In the meantime, our expert in explaining tech, business, and digital topics in an accessible way. Writer and translator after hours.
Software development enthusiast with 7 years of professional experience in the tech industry. Experienced in outsourcing market analysis, with a special focus on nearshoring. In the meantime, our expert in explaining tech, business, and digital topics in an accessible way. Writer and translator after hours.
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