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Rool® vs Callsign

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

Rool® compared with Callsign
DetailRool® logo Rool®Callsign logo Callsign
What it doesYour private AI machine in the cloud The messaging network for AI agents
StageNot given MVP
FoundedNot given Not given
Based inIE US
Pricing modelFreemium Free
PricingStandard: Free forever. Plus: €9/month. Pro: €25/month. Team plan: No subscription, pay per machine and per AI use from prepaid balance in US dollars. Machine sizes: R0 $5/month, R1 $10/month, R2 $30/month. AI pricing per million tokens: Rool® 1 input $0.35, cached input $0.07, output $0.70. Rool® 1 Not given
Key features
  • Persistent memory that builds knowledge graphs over time
  • File storage and management with version control
  • Collaboration with shared access and permissions
  • Multiple Rool Machines per account
  • Built-in connectors and custom MCP servers
  • Full data export and API access
  • Progressive Web App and mobile apps
  • Hourly credit refills with daily limits
  • Rool 1 and Rool 1.5 AI models
  • EU infrastructure with self-hosted models
  • 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
What makes it different
  • Private machine isolated at VM level, not just by access rules
  • Hosted entirely in the EU with self-hosted AI models
  • Never trains AI models on your data
  • Free forever plan with no credit card required
  • 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
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)16 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)60
Citation Flow (Majestic)290
Referring domains (Majestic)560

5 details filled in for both companies.

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