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openagent.email vs Terminus

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

openagent.email compared with Terminus
Detailopenagent.email logo openagent.emailTerminus logo Terminus
What it doesSelf-hosted email and task handoffs for AI agents with no vendor control plane Infrastructure to build and run apps, agents, skills and services
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Free
PricingSelf-hosted is free under Apache-2.0 license (pay only for VPS infrastructure ~$5/month and domain ~$10/year). Hosted Pro Early Bird: $30.00/year one-time payment, no auto-renewal. Not given
Key features
  • MCP 2026-07-28 support for Claude, Cursor, Kimi Code and other clients
  • Unlimited agent mailboxes on your own domain
  • Email-backed agent-to-agent task threads with stamped states
  • CLI for local development and deployment
  • Apps with offline-capable records that sync across devices
  • Long-running agents working 24/7
  • Reusable skills that work across platforms
  • Hosted and external services integration
  • Free hosting
  • Local testing with terminus dev simulator
  • Background jobs, schedules and webhooks
  • Support for TypeScript, Rust, Python, Go, C and C++ services
  • Shared spaces for team collaboration
What makes it different
  • Apache-2.0 open source with no vendor control plane or per-inbox software fees
  • Mail stays on your server under your control unless you explicitly opt into external services
  • Built-in OTP extraction tested against real services from US and Chinese providers
  • Lego-style composable components that connect together
  • Free hosting forever for all creations
  • Unified workflow from local development to published releases
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)4 −1 (down) since last check3 +1 (up) since last check
Trust Flow (Majestic)35
Citation Flow (Majestic)2626
Referring domains (Majestic)284

4 details filled in for both companies.

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