OpenCode alternative

An open-source OpenCode alternative (2026)

In short: Both are open-source terminal coding agents. agentty's edge is a single native C++26 binary (no runtime), millisecond cold start, built-in retrieval, and a sandbox by default.

OpenCode and agentty share a philosophy: open-source, terminal-first AI coding. Here's where agentty differs.

How agentty compares

  • Native C++26 single binary — 16.7 MB, ~3 ms cold start, zero runtime dependencies.
  • Multi-provider — Claude Pro/Max, OpenAI, Groq, OpenRouter, Cerebras, local Ollama.
  • Sandboxed by default; SSH air-gap in one command.
  • Built-in RAG — hybrid BM25 + dense retrieval so only relevant code reaches the model.
  • Runs in Zed over ACP; speaks MCP.
  • MIT-licensed.

Which to choose

Both are strong open-source picks. Choose agentty if raw speed, a dependency-free binary, and built-in retrieval matter most to you.

Install in one line

curl -fsSL https://agentty.org/install.sh | sh

Install in one line — a single static binary, no Node or Python.

curl -fsSL https://agentty.org/install.sh | sh
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