Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence.
Open-source meta-harness that orchestrates Claude Code, Codex, Cursor, OpenCode, Hermes and Pi from one session, on any device.
A common orchestration layer over other harnesses rather than a harness of its own — swap Claude Code/Codex/Cursor/etc. in and out, enforce policies, and run sessions in cloud sandboxes (Modal, Daytona, E2B and others).
Stateful agent server where memory is the primary abstraction.
| Omnigent | Letta | |
|---|---|---|
| Licence | Open source | Open source |
| Pricing | open source | freemium |
| Self-hostable | Yes | Yes |
| Languages | Any language | Python, TypeScript |
| Install | curl -fsSL https://raw.githubusercontent.com/omnigent-ai/omnigent/main/scripts/install_oss.sh | sh | pip install letta |
| Keys required | ANTHROPIC_API_KEY, OPENAI_API_KEY | None |
Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence. Omnigent: Open-source meta-harness that orchestrates Claude Code, Codex, Cursor, OpenCode, Hermes and Pi from one session, on any device. Letta: Stateful agent server where memory is the primary abstraction.
Omnigent can run on your own infrastructure. Letta can run on your own infrastructure.
Omnigent is open source (open source). Letta is open source (freemium).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/omnigent-vs-letta