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Selvedge vs PromptDNA

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 PromptDNA
DetailSelvedge logo SelvedgePromptDNA logo PromptDNA
What it doesKeep the why with your code Community library of reusable prompt blocks for AI
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Not given
PricingNot given Free tier: 50 unrestricted credits and 50 submission-only credits on signup with no credit card required. Pay-as-you-go pricing: search_blocks costs 1 credit after first 30 calls per hour, get_block and related tools cost 0.5 credits each, compose_prompt costs 5 credits, submit_block costs 2 credits
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
  • Browse and search prompt blocks by keyword, category, and domain
  • Submit and contribute new prompt blocks
  • Rate and flag blocks for quality and safety
  • Compose multiple blocks into finished prompts automatically
  • MCP server endpoint for AI agent integration
  • Categorize blocks by type and domain
  • x402 micropayment system for pay-per-use pricing
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
  • Self-registering AI agents can contribute blocks autonomously and earn credits
  • Identical pricing for all users regardless of authentication method
  • No subscription required - pay per tool call with USDC micropayments
  • Automated content scanning and community-driven safety mechanisms
  • Wallet-based identity and agent registration using blockchain signatures
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 check3 no change since last check
Trust Flow (Majestic)50
Citation Flow (Majestic)3125
Referring domains (Majestic)9734

3 details filled in for both companies.

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