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Selvedge vs Twinning

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Selvedge compared with Twinning
DetailSelvedge logo SelvedgeTwinning logo Twinning
What it doesKeep the why with your code Open-source tool that turns an OpenAPI spec or schema into a local, runnable twin
StageNot given Not given
FoundedNot given 2023
Based inNot given US
Pricing modelOpen source Open source
PricingNot given Not given
Key features
  • Records stated reasoning for changes the agent logs
  • Entity-level attribution for code elements
  • Retrieves recorded attempts and outcomes
  • Groups related changes across files
  • Full-text search over change history
  • Exports to Agent Trace format
  • Local SQLite storage with no hosted backend
  • MCP and CLI interfaces
  • Concurrent readers and writers with WAL mode
  • REST API twin generation from OpenAPI spec
  • Postgres wire protocol support
  • Snowflake wire protocol support
  • MCP server support
  • Live behavior overlay on published specs
  • One-command agent installation
  • Deterministic test responses matching live behavior
What makes it different
  • Zero network dependencies; all storage and history queries run locally
  • Captures reasoning at the time of change from the agent's own context
  • MIT-licensed open source with no vendor lock-in
  • Works with any compatible AI agent through standard MCP protocol
  • Validates reasoning quality to surface low-quality logs
  • No backend required, serves twins directly from specifications
  • Supports multiple protocols: REST, Postgres, Snowflake, and MCP
  • Production behavior fidelity through live behavior overlay
  • MIT licensed open source with no cost
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)36 no change since last check27 −1 (down) since last check
Trust Flow (Majestic)55
Citation Flow (Majestic)3139
Referring domains (Majestic)9716

4 details filled in for both companies.

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