Butterfish Shell records 34 monthly visits with -97.5% month-over-month growth and Free, Open Source (bring your own API key) pricing. Open Interpreter records 57,487 monthly visits with -29% growth and Free pricing.
A bash and zsh shell with LLM prompting built in
Open-source coding agent built for low-cost, open-weight language models
| Dimension / Metric | | |
|---|---|---|
| Official Domain | butterfi.sh | openinterpreter.com |
| Pricing Model | Free, Open Source (bring your own API key) | Free |
| Monthly Visits | 34 (34) | 57.49K (57,487) |
| MoM Traffic Delta | -1.33K (-97.5%) | -23.48K (-29%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (19.5%) |
| Direct Visits / mo | 14 | 14.91K |
| User Rating | 4.4 | 4.7 |
| Supported Platforms | Website | Website |
A bash and zsh shell with LLM prompting built in
Start any line with a capital letter to send it to the AI as a prompt, while normal lowercase commands behave exactly as before.
The model receives your recent commands and their output, so follow-up questions like 'why did that fail?' get grounded answers.
Copilot-style command suggestions appear in the shell and can be applied with Tab, informed by your recent history.
Trigger an autonomous loop with ! to have the model propose commands toward a goal, or !! to let it run them without confirmation.
Open-source coding agent built for low-cost, open-weight language models
The agent writes code, runs it in your local environment, reads the output, and keeps iterating until the task is finished — so results are files and actions, not just chat replies.
Built with inexpensive and openly available models in mind, making agentic coding workflows accessible without a premium hosted plan.
Runs as an interactive session in your shell, with proposed commands shown before execution so you can review, approve, or redirect the agent.
Point it at different model backends, including locally served models, so you can trade off cost, speed, and privacy depending on the job.
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AI-powered terminal and agentic software factory for development teams
