Both are open-source, terminal-first coding agents with multi-provider support. Here's where they differ.
At a glance
| agentty | OpenCode | |
|---|---|---|
| Runtime | Native C++26 binary | Runtime-based |
| Cold start | ~3 ms | Runtime startup |
| Retrieval | Built-in hybrid BM25 + dense RAG | Varies |
| Sandbox | On by default | — |
| Editor | Zed via ACP | TUI |
| License | MIT | Open source |
Where each shines
- OpenCode — a capable, community-driven open agent with a polished TUI.
- agentty — raw speed (native binary, no runtime), built-in retrieval with a learning loop, and a sandbox by default.
Which should you choose?
Both are solid open-source picks. Choose agentty if a dependency-free native binary, millisecond startup, and built-in RAG are priorities.
Install in one line
curl -fsSL https://agentty.org/install.sh | sh