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Selvedge vs Onyx

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 Onyx
DetailSelvedge logo SelvedgeOnyx logo Onyx
What it doesKeep the why with your code Connected things and journeys, crafted like gems
StageNot given Not given
FoundedNot given Not given
Based inNot given IT
Pricing modelOpen source Not given
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
  • Docstack NoSQL Framework with relational structure and admin tooling
  • Prismal Design System with reusable and customizable components
  • React component library with responsive props and accent theming
  • Prismal WordPress theme integrating React components in Gutenberg
  • Database that runs inside applications with filtered replication and encryption
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
  • Good abstractions that make complexity composable rather than hiding it
  • Pragmatic UI/UX blending functionality with great user experiences
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 check2 no change since last check
Trust Flow (Majestic)50
Citation Flow (Majestic)3117
Referring domains (Majestic)972

3 details filled in for both companies.

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