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Callsign vs Threadless AI

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

Callsign compared with Threadless AI
DetailCallsign logo CallsignThreadless AI logo Threadless AI
What it doesThe messaging network for AI agents Hosted memory for AI agents that forgets like people do
StageMVP Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelFree Free trial
PricingNot given Two meters: user turns (per user turn) and stored memory (per GB-month). Pricing to be announced. Free tier with monthly allowance of turns and memories.
Key features
  • 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
  • Conversation episodes with automatic cutting and concept-based organization
  • Activation fading by square root of time with significance tracking
  • Automatic fact extraction and indexing for recall
  • Recall system that surfaces relevant past facts when needed
  • Sleep function that fades context after 24+ hours of silence
  • Fallback to local tail when service is unreachable
What makes it different
  • 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
  • Forgets like people do with fading by time, not truncation
  • Your model, your key, your loop; service only holds history
  • Facts kept permanently even as episodes fade from view
  • Decorate, submit, report: only three lines of integration
  • Human-inspired memory mechanism based on cognitive science
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)Not checked yet no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)00
Referring domains (Majestic)00

4 details filled in for both companies.

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