Keen Code vs. zerostack

Feature	Keen Code	zerostack

Tagline	Terminal coding agent in Go with a deliberately lean tool set	Minimal Rust coding agent optimized for memory footprint
Website	https://mochow13.github.io/keen-code/	https://gi-dellav.github.io/zerostack/
Language	go	rust
Release Date	February 16, 2026	May 12, 2026
Last Updated	September 4, 2026	September 4, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	basic	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	No	Yes
Voice Mode	No	No
IDE Integration	None - terminal only	Zed (via ACP), Neovim (via CodeCompanion.nvim + ACP)
Hooks / Extensions	No	Yes
Web Search	No	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent; auto-compaction	Model-dependent; auto-compaction
Supported Models	Anthropic, OpenAI, Codex via ChatGPT OAuth, Google AI, Moonshot Kimi, Z.ai GLM, DeepSeek, MiniMax, Amazon Bedrock, OpenCode Go, plus any OpenAI-compatible endpoint	OpenRouter (default), OpenAI, Anthropic, Gemini, Ollama, plus unlimited custom OpenAI-compatible endpoints (vLLM, LiteLLM, enterprise gateways)
Supported Subscriptions	ChatGPT	—
Pricing Model	Free, BYOK	Free, BYOK
Free Tier	Yes	Yes
Price Range	Free (BYOK)	Free (BYOK)
Source Code Availability	Open Source (MIT)	Open Source (GPL-3.0)
Source Code	https://github.com/mochow13/keen-code	https://github.com/gi-dellav/zerostack
Development State	active	active