Callsign vs AINRA
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 AINRA
| Detail | 
Callsign | 
AINRA |
|---|
| What it does | The messaging network for AI agents
| The identity layer for autonomous AI
|
|---|
| Stage | MVP
| Startup
|
|---|
| Founded | Not given
| 2026
|
|---|
| Based in | US
| Not given
|
|---|
| Pricing model | Free
| Open source
|
|---|
| Pricing | Not given
| Not given
|
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| 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
| - Offline verification in milliseconds
- Cryptographic passports for agents
- Revocation under 60 seconds
- Authority classes and assurance tiers
- No central authority calls required
- Local registrar lifecycle
- Request signing with short-lived keys
- Public conformance testing
- Fail-closed HTTP gating
- Appeal mechanism for revocation
|
|---|
| 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
| - Neutral non-profit root barred by charter from issuing credentials or computing scores
- Fully open standard with published conformance vectors and reproducible releases
- Verification runs offline without phoning home to any authority
- Four independent implementations agreeing on all conformance vectors
- Public recorded ceremony to establish the root across independent custodians
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
|
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| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
|---|
| Citation Flow (Majestic) | 0 | 0 |
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| Referring domains (Majestic) | 0 | 0 |
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5 details filled in for both companies.
More alternatives to Callsign More alternatives to AINRA