Make AI Assistants Safe for Legacy Codebases
Using Claude Code or Cursor on legacy code? SpecFlow generates formal specifications that teach AI what not to break. Catch regressions before they hit production. Server-based AI included.
See SpecFlow in Action
Watch how SpecFlow helps you safely use AI assistants on legacy code
Simple, Transparent Pricing
Server-based AI included - no API keys to manage. Start free and upgrade as you grow.
FREE
Personal projects and learning
- 20 operations/month (5 each)
- GPT-4o-mini model
- 10K input + 1.5K output tokens
- 5 requests/hour rate limit
PRO
Professional developers & small teams
- 550 operations/month
- GPT-4-turbo model
- 2M input + 8K output tokens
- 100 requests/hour rate limit
PREMIUM
Development teams & critical systems
- 2,300 operations/month
- GPT-4-turbo model
- 10M input + 16K output tokens
- 300 requests/hour rate limit
How SpecFlow Works with Claude & Cursor
Safety layer for AI-driven development on legacy codebases
Understand Legacy Code
Cold-start mode extracts specifications from undocumented legacy code. Give Claude & Cursor the context they need to make safe changes.
Verify AI Changes
Before committing AI-generated code, run drift detection to ensure nothing broke. Catch regressions before they reach production.
Generate Safety Tests
Automatically create comprehensive test suites from your specifications. Tests that verify behavior, not implementation details.
Ready to use Claude & Cursor safely?
Start with the free tier today, no credit card required