Callsign vs docspi
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 docspi
| Detail | 
Callsign | D
docspi |
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| What it does | The messaging network for AI agents
| Virtual document trees and API for AI agents
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| Stage | MVP
| Not given
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| Founded | Not given
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| Based in | US
| Not given
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: $0 (10 projects, 2,000 nodes, 2 custom agents, 300 API requests/day). Pro: $4/month or $36/year (50 projects, 20,000 nodes, 10 custom agents, 2,000 API requests/day, 1 custom domain). Team: $29/month or $288/year for the whole workspace (500 projects, 200,000 nodes, 25 custom agents, 20,000 AP
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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
| - Create and organize documents in virtual trees without moving underlying files
- Connect AI agents through REST API with scoped bearer tokens
- Project manifest in machine-readable JSON format
- Sealed secrets for agent-to-agent communication
- Search documents by name, description, and tags
- Project health checks with optional auto-repair
- Agent-to-agent messaging within workspace
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| 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
| - Index-based organization without moving original files
- 32 MCP tools for AI agent integration
- Workspace-wide Team pricing regardless of member count
- Free plan with no credit card required
- Automatic TLS certificates for custom domains
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 6 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 15 |
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| Referring domains (Majestic) | 0 | 3 |
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4 details filled in for both companies.
More alternatives to Callsign More alternatives to docspi