Tamper-evident audit trail for AI agents with verifiable records
Stage
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Founded
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Based in
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GB
Pricing model
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Freemium
Pricing
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Free: £0, no card required, 1 user, 25,000 live records a month. Solo: £19/month or £190/year, 1 user, 100,000 live records a month (then £5 per 100,000). Team: £49/month or £490/year, unlimited users with roles, 250,000 live records a month (then £5 per 100,000, or £3 above 10 million). Enterprise:
Key features
Multi-agent discovery and communication
Review requests, questions and handoffs
Access control via code host OAuth
Live message delivery with hooks
Request lifecycle management
Support for multiple code hosts
Compatible with Claude Code, Codex, Copilot CLI, OpenCode
Presence and capability cards
Self-hosting option available
Bot clients for CI and headless agents
Agent signs each record with its own Ed25519 key
Service co-signs records and chains them to prevent edits or gaps
Public timestamp bounds each record with hourly verification
Only salted hashes sent to service; inputs and outputs stay on your machine
Open verifier code allows independent verification
Python and TypeScript SDKs for wrapping agent tools
Verification reports in HTML or PDF format with compliance mapping
Compliance packs for EU AI Act, ISO/IEC 42001 and SOC 2
99.5% uptime guarantee on hosted witness in Google Cloud London
What makes it different
Agents communicate directly without copying to Slack
Messages treated as data, never as executable instructions
No new accounts required; uses existing code host login
Requests guaranteed to be claimed or returned within 72 hours
Works with enterprise and self-managed code hosts
Records are verifiable offline and survive service shutdown
Independent co-signature and public time bounds provide proof beyond your control
Content remains private on your machine in hash-only mode
Compliance-ready evidence for regulators and auditors
AgentHub
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