Swimm vs Refraction

Swimm helps engineering teams understand, document, and modernize complex codebases using a mix of static analysis, AI agents, and senior engineers. The platform maps dependencies, data flows, and business logic across repos, then turns that understanding into documentation, migration plans, and deliverables teams can verify.

Swimm offers three service tracks: API-first architecture to extract reusable backend services, an agentic development context layer that feeds validated codebase knowledge into tools like Copilot and Cursor, and large-scale migrations for .NET, Java, monolith-to-microservices, and mainframe modernization. Engagements run through a four-stage model (Assessment, Specification, Modernization, Enablement) with fixed pricing per stage.

The company is SOC 2 and ISO 27001 certified, supports on-prem and air-gapped deployments, and works with customer-managed LLMs. Swimm has analyzed over 100 million lines of code and supports legacy languages including COBOL, JCL, and PL/I alongside modern stacks.

Improve and generate code with AI. Refactor code, create documentation, and write unit tests automatically. Simply paste your code, select a language or framework, and click "Generate" to see the magic happen. Refraction is a code generation tool for developers. It harnesses AI to generate code for you. Use it to produce unit tests, documentation, and refactor code.