Application Modernization Services

Application modernization services involve transforming legacy software systems to meet current business and technology demands. These include updating architecture, migrating to cloud infrastructure, improving code quality, modernizing integrations, and enabling AI readiness. At Radixweb, we deliver software modernization services across the full transformation stack from assessment through post-launch optimization.

Application modernization costs vary widely based on project scope and complexity. Small projects (single application) start at $100K-$250K. Mid-sized modernizations (2-3 applications) range $250K-$1M. Large, complex enterprises with extensive legacy systems run $1M-$3M+. We provide detailed cost breakdowns right during the assessment phase, so you know the investment upfront.

Most mid-sized modernization projects take 10-24 week including discovery & strategy (2-4 weeks), architecture & design (2-4 weeks), development & migration (6-16 weeks), testing & cutover (2-4 weeks). The usual post-launch support lasts for 2-4 weeks. The exact timeline depends on team engagement, architecture approach, data complexity, and parallel capacity. At Radixweb, we ensure incremental delivery, which ensures that the value of modernization arrives throughout, not just at launch.

Most clients recover their modernization investment within 12 to 18 months through reduced infrastructure and maintenance costs. Infrastructure costs typically drop by up to 60 percent and deployment frequency increases 10x. We build a business case model at the start of every engagement so stakeholders can evaluate ROI before committing to proceed.

Rehosting moves your application to new infrastructure with minimal code changes, quickly and at low-risk but offers limited in transformation value. Refactoring improves existing code quality without changing core architecture, removing technical debt. Rearchitecting redesigns the application structure itself (breaking a monolith into microservices) to unlock cloud-native scalability. Most programs combine all three across different application components based on business priority and risk tolerance.

Legacy systems that still work typically consume 60 to 80 percent of IT budgets on maintenance alone while creating security vulnerabilities, integration barriers, and talent retention challenges. They work, but expensively and at escalating risk. Planned, phased modernization is significantly less disruptive and costly than responding to failure after the fact.

We use incremental delivery with strangler fig patterns, blue-green deployments, feature flags, and backward-compatible APIs throughout the migration. Legacy and modernized systems run in parallel with data consistency verified at every step before cutover. Every phase includes a tested rollback path before work begins. We do not do big-bang cutovers.

Migration moves an application to a new environment, typically on-premise to cloud. Modernization transforms the application itself including its architecture, code quality, integration patterns, and tech stack, so it can actually leverage the new environment. Migration without modernization results in cloud-washed legacy systems that run on modern infrastructure but cannot benefit from it.