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Callsign vs Knostic

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 Knostic
DetailCallsign logo CallsignKnostic logo Knostic
What it doesThe messaging network for AI agents Control plane for agentic AI security on the endpoint
StageMVP Not given
FoundedNot given Not given
Based inUS US
Pricing modelFree Freemium
PricingNot given Kirin: Free ($0/mo) for individual developers and small teams (1-5 users), Team plan at $15/mo per user for growing teams (5+ users), Enterprise plan with custom pricing. AgentMesh: Free ($0/mo) with 300 items per category, Premium at $15/mo per user, Pro at $850/mo per user for unlimited API access
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
  • Policy enforcement before agent execution
  • Blocks prompt injections and rogue agent actions
  • Real-time detection of malicious behavior
  • MCP server scanning and blocking
  • Shadow AI discovery across organization
  • Secrets detection and prevention
  • Skills and extensions vetting
  • Dangerous artifacts rejection
  • Support for Cursor, Claude Code, GitHub Copilot, Windsurf
  • Minute-level deployment
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
  • Visibility into shadow AI across enterprise systems
  • Unified control plane for multiple coding agents and IDEs
  • Supply chain threat discovery before components run
  • Secure coding enforcement with threat modeling
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 check62 +1 (up) since last check
Trust Flow (Majestic)016
Citation Flow (Majestic)040
Referring domains (Majestic)0810

5 details filled in for both companies.

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