Legacy Modernization Agencies
Browse verified legacy modernization agencies. Find the perfect partner for your next project.
Showing 42 agencies
Agencies are shown in random order within quality tiers for fair visibility. Refresh for a new arrangement.
CGI
📍 California, Washington, Colorado, Connecticut, Hawaii, Illinois, Massachusetts, Maryland
Global IT and business consulting company offering comprehensive application modernization including mainframe migration and portfolio rationalization.
Infosys
📍 Texas
Leading global IT services company with robust cloud migration practice spanning strategy, execution, and managed services.
Capgemini
📍 New York
Global consulting and IT services leader providing comprehensive cloud migration and transformation services across all major platforms.
Charter Global
📍 Georgia
Leading IT solutions provider specializing in digital transformation, custom software development, and enterprise IT consulting since 1997.
IBM Consulting
📍 New York
Global consulting leader with comprehensive cloud migration services across AWS, Azure, Google Cloud, and Oracle, specializing in enterprise transformations.
NTT DATA
📍 Texas
Global IT services company providing mainframe modernization with AWS Premier Consulting Partner status and proprietary UniKix rehosting software for up to 70% cost savings.
Damco Solutions
📍 New Jersey
IT services company providing legacy modernization with 400+ applications modernized across healthcare, financial services, and logistics sectors.
DXC Technology
📍 Virginia
Fortune 500 IT services company providing enterprise-scale cloud migration and modernization services across hybrid and multi-cloud environments.
Luxoft
📍 New York, Michigan, Washington
Global IT services company providing legacy application modernization services for complex, business-critical systems with expertise in mainframe technologies and custom tool development.
Hexaware Technologies
📍 New Jersey, Georgia, Illinois, Virginia, Massachusetts, California
Global IT services company accelerating legacy modernization with RapidX GenAI platform for automated code refactoring and knowledge transfer.
Assembly
📍 Florida
Application modernization consulting company helping enterprises update legacy systems with cloud-native approaches and microservices architecture.
Cognizant
📍 New Jersey
Global IT services company with extensive cloud migration practice, serving businesses with secure workload transitions across all major platforms.
Accenture
📍 New Jersey
Global professional services company with 700,000+ employees providing comprehensive cloud migration strategy, implementation, and management services.
Wipro
📍 New Jersey
Global IT services provider with comprehensive cloud migration solutions tailored for diverse industries and complex enterprise requirements.
Persistent Systems
📍 California
Digital engineering company transforming legacy environments into agile digital ecosystems through platform unification and cloud-first architecture.
Andersen
📍 New York
Full spectrum software development and IT outsourcing for healthcare, finance, and logistics with long-term partnership focus.
Cabot Technology Solutions
📍 Massachusetts
Boston-based MVP development company delivering investor-ready products with HIPAA compliance expertise.
10Pearls
📍 Virginia, Illinois
Global digital development company with 1,500+ professionals delivering custom software, AI, cloud, and cybersecurity solutions.
Deloitte
📍 New York
Big Four professional services firm providing comprehensive cloud migration and digital transformation services across all major cloud platforms.
HCLTech
📍 North Carolina, Michigan, California, Washington, Pennsylvania, New Jersey, Illinois
Global technology company driving continuous modernization through CloudSMART strategy and AI Force platform for automated code refactoring.
Astadia
📍 Arizona
Mainframe modernization specialist focused on replatforming legacy applications to cloud-ready solutions with typical savings of 60-80%.
SparxIT
📍 Massachusetts, New York
Legacy software modernization company providing systematic transformation with cloud enablement and mainframe modernization services.
Maxima Consulting
📍 Massachusetts, New Jersey
IT consulting firm specializing in legacy system modernization with expertise in code refactoring, containerization, cloud migration, and process automation for enterprise clients.
mLogica
📍 California
Enterprise IT modernization company with automated software for mainframe and distributed system migrations to cloud platforms.
Softura
📍 Michigan
Technology consulting and IT staff augmentation company specializing in custom software development, cloud computing, and AI solutions.
Veryant
📍 California
Veryant provides COBOL software solutions that help organizations maintain, modernize, and extend COBOL applications with portable, Java-based technology that lowers costs and improves performance.
Kyndryl
📍 New York
World's largest IT infrastructure services provider offering mainframe modernization with AI and GenAI capabilities for hybrid cloud transformation.
Devox Software
📍 Florida
Full-cycle software development company offering AI-enhanced legacy application modernization with 30% time savings through AI Solution Accelerator.
SingleStone Consulting
📍 Virginia
Boutique Salesforce consulting firm since 1997 with 75 onshore employees specializing in enterprise Salesforce deployment and customization.
TSRI
📍 Washington
Mainframe modernization specialist with JANUS Studio AI Platform for automated code conversion, refactoring, and documentation with 30 years of proven success.
Fujitsu
📍 Texas
Fujitsu is a global leader in digital services that transform organizations and the world around us. We aim to make the world more sustainable by building trust in society through innovation.
XTGlobal
📍 Texas
IT services company providing legacy system modernization and transformation with cloud migration and digital enablement expertise.
Softweb Solutions
📍 Texas
IT consulting company specializing in AI, data solutions, and digital transformation services globally.
Boston Technology Corporation
📍 Massachusetts
IT consulting and solutions company providing application migration and modernization services for cloud transformation.
AllianceTek
📍 Pennsylvania
Software development company providing legacy modernization and migration services with phased approach minimizing business disruption.
Entrance Consulting
📍 Texas
Custom app development company with extensive experience in legacy application modernization and enterprise technology platform transformation.
TierPoint
📍 Missouri
Infrastructure and managed services provider offering DevOps consulting to accelerate software delivery and optimize cloud operations.
Techzert
📍 New York
Application modernization consulting company specializing in IBM Financial Transaction Manager implementations and payment system modernization.
Door3
📍 New York
Modernizing businesses through AI, data, and innovative software solutions.
BCL (Baer Consulting)
📍 Colorado
Premier mainframe services provider for over 40 years specializing in mainframe-as-a-service and legacy modernization for mid-market customers.
Tech.us
📍 Connecticut
Software modernization company providing legacy system transformation with focus on agile methodologies and proactive, scalable solutions.
Protiviti
📍 Illinois
Global consulting firm providing enterprise data, analytics, AI, and advanced analytics strategies with modern data foundations.
Legacy Modernization Agency FAQ
Common questions about finding and evaluating legacy modernization agencies.
What should I look for when hiring a legacy modernization agency?
Ask for case studies with measurable outcomes relevant to your specific project. Check team composition — do they have specialists or generalists? Ask about their communication cadence and project management approach. Request client references from companies of similar size and complexity to yours.
How much does it cost to hire a legacy modernization agency?
Project costs vary significantly based on complexity, team size, and engagement model. Request proposals from 3–5 agencies to benchmark pricing. Be cautious of quotes that are dramatically lower than others — they usually indicate corners being cut.
How long does a typical legacy modernization project take?
Timelines depend on project scope and complexity. A good agency will provide a phased delivery plan with clear milestones. Be wary of agencies that commit to aggressive timelines without a thorough discovery phase.
What are red flags when evaluating legacy modernization agencies?
No relevant case studies, inability to explain their process, quoting before understanding your requirements, no quality assurance practices, and reluctance to provide client references.
How many legacy modernization agencies are listed on AgencyCluster?
AgencyCluster currently lists 42 legacy modernization agencies, of which 42 have been fully verified. These agencies are located across 19 U.S. states. The current top-ranked legacy modernization agency is Accenture with a score of 100/100. Agencies are ranked using the AgencyCluster Score (0–100), which evaluates credibility, proof of work, reputation, category specialization, delivery maturity, and freshness.
All agencies are verified through our verification process. Know a great agency? Suggest an addition.