Aider vs. zerostack

Feature	Aider	zerostack

Tagline	AI pair programming in your terminal	Minimal Rust coding agent optimized for memory footprint
Website	https://aider.chat	https://gi-dellav.github.io/zerostack/
Language	python	rust
Release Date	July 8, 2023	May 12, 2026
Last Updated	June 29, 2026	September 4, 2026
Provider Type	Independent	Independent
MCP Support	No	Yes
Multi-Agent Support	No	Yes
Git Integration	deep	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	No	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	VS Code, Neovim, Emacs	Zed (via ACP), Neovim (via CodeCompanion.nvim + ACP)
Hooks / Extensions	Yes	Yes
Web Search	No	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; auto-compaction
Supported Models	Claude Sonnet 4.5/4.6, Claude Opus 4.5/4.6, GPT-5.4, GPT-4o, DeepSeek, Gemini, Llama, Qwen	OpenRouter (default), OpenAI, Anthropic, Gemini, Ollama, plus unlimited custom OpenAI-compatible endpoints (vLLM, LiteLLM, enterprise gateways)
Pricing Model	BYOK	Free, BYOK
Free Tier	Yes	Yes
Price Range	Free (BYOK)	Free (BYOK)
Source Code Availability	Open Source (Apache-2.0)	Open Source (GPL-3.0)
Source Code	https://github.com/Aider-AI/aider	https://github.com/gi-dellav/zerostack
Development State	active	active