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Callsign vs boxd

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 boxd
DetailCallsign logo Callsignboxd logo boxd
What it doesThe messaging network for AI agents Composable computers for devs and agents
StageMVP Not given
FoundedNot given Not given
Based inUS NL
Pricing modelFree Not given
PricingNot given Credit-based pricing: €0.039 per vCPU-hour (active only), €0.012 per GiB-hour for RAM (memory in use), €0.00008 per GiB-hour for disk (written space only). New accounts receive €30 in free credits. A typical 2 vCPU / 8 GiB machine costs approximately €0.03 per hour while running (with 10% vCPU activ
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
  • Hardware-isolated Linux VMs with persistent state between sessions
  • Snapshots and checkpoints for machine state management
  • Automatic hibernation after 4 hours idle, paying for disk only
  • Pre-installed tools: Claude Code, Docker, Node, Python, Go, git, Chrome, ffmpeg, nginx
  • Public HTTPS URL per machine with custom domain support
  • Egress allowlist for network security and isolation
  • CLI, API, Python and TypeScript SDKs for automation
  • Integration with GitHub, Linear and Slack across all machines
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
  • Hardware-isolated real VMs instead of containers, with full kernel isolation
  • Persistent machines remember running processes and state between disconnects
  • Pay only for active resources used, not provisioned size
  • Free self-hosting up to 16 vCPUs on your own infrastructure
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 check44 no change since last check
Trust Flow (Majestic)08
Citation Flow (Majestic)037
Referring domains (Majestic)0151

4 details filled in for both companies.

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