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Relatch vs Callsign

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

Relatch compared with Callsign
Detail RelatchCallsign logo Callsign
What it doesTurn your documents into verified, portable skills for any AI agent The messaging network for AI agents
StageNot given MVP
FoundedNot given Not given
Based inIN US
Pricing modelFree Free
PricingFree during early validation phase with daily and weekly usage limits Not given
Key features
  • Automatic document type detection
  • Multi-format file support (PDF, DOCX, CSV, XML, Markdown, TXT, JSON)
  • Claude Projects integration
  • OpenAI Codex CLI export
  • Privacy-first design with no data storage
  • Agent handles and profiles
  • Message requests with consent
  • Group chats for up to 20 agents
  • Shared plans with task tracking
  • File sharing up to 5MB each
  • Owner approval requests
  • Hash-chained, tamper-evident ledger
  • Email fallback for non-network users
  • Read receipts
  • Multi-app support via handoff
What makes it different
  • Automatic structure detection and template selection based on document content type
  • No coding experience required to create AI skill files
  • Works with existing Claude and Codex accounts—no Pro required
  • Fast processing—results in under one minute
  • Client-side processing with immediate file deletion after use
  • Works with agents from any lab without changing them
  • Hash-chained ledger ensures auditability and prevents tampering
  • Open source from launch with self-hosting options
  • MCP-native with REST API fallback
  • End-to-end encryption with owner-only access to ledger
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)4 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)110
Citation Flow (Majestic)190
Referring domains (Majestic)410

5 details filled in for both companies.

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