Butterfish Pricing 2026
Complete pricing guide for Butterfish — plans, costs, and free options.
💰 Butterfish Pricing Overview
Butterfish uses a open source pricing model. Free and open-source software you can self-host. Current pricing: Free and open source. No paid tier or hosted plan is published; you authenticate with your own OpenAI or OpenAI-compatible API credentials. Butterfish is a coding & development tool known for open-source cli that adds ai prompting to bash and zsh — capital-letter commands go to the model, which can see your shell history. You can get started with Butterfish for free.
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Before you compare plans: does ChatGPT name Butterfish when someone asks for a coding & development recommendation? Run a free AI-visibility scan on any tool — 5 prompt angles, ~30 seconds, no signup, no card.
🔍 Compare Before You Buy
See all 5 alternatives →Comparing Butterfish to similar tools helps you make the best choice for your budget and needs:
TmuxAI
Open SourceTerminal assistant that runs in a tmux pane, reads what is on screen across every pane, and proposes commands you approve before they run.
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Compare with Butterfish →Repomix
Open SourcePacks any repo into one AI-friendly file with secret scanning, .gitignore awareness and token counts
Free to use
Compare with Butterfish →Lovable
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Free plan + paid from $20/month
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Butterfish Plans & Pricing
Free
Open source
* Pricing information is based on publicly available data and may not reflect current promotions, annual discounts, or regional pricing. Visit the official Butterfish website for the latest pricing.
Is Butterfish your tool?
Claim it to take a capped slot in Coding & Development — each category sells a fixed number — so your row ranks above every free tool in it, and above the 5 alternatives we list for Butterfish, with a Featured badge.
Claim Now →Is Butterfish Free?
Butterfish is open-source software that you can use, modify, and self-host completely for free. This makes it an excellent choice for developers and organizations who want full control over their deployment. Some managed hosting or cloud-based versions may have associated costs.
Before you pay for Butterfish
We wrote up the free routes to this job
We have not written a free-Butterfish-alternatives guide yet. The closest one we have is built around Lovable — the same Coding & Development job, and every free tier in it was read off the vendor's own pricing page on a stated date: the allowance, what the free plan withholds, and the price the paid tier actually starts at. Several of the tools in it are alternatives to Butterfish too.
Free Lovable alternatives, compared →Check Butterfish pricing at the source
The breakdown above is our summary of Butterfish's published pricing, not a quote. Plans, limits and what each tier includes change without notice — confirm on Butterfish's own pages before you buy.
Official Butterfish site ↗We do not represent Butterfish and these links are not paid placements.
Is Butterfish Worth It?
Butterfish is a free coding & development tool that offers 6 key features including Prompt the AI from bash or zsh by starting a command with a capital letter, Model sees recent shell history, so 'why did that fail?' works with no copy-paste, Goal Mode iterates commands toward a stated objective. Butterfish adds AI prompting directly to bash and zsh without changing how you use the shell. Once `butterfish shell` is running, you use your terminal exactly as before, and any command that starts with a capital letter is routed to the model instead of the shell. Because Butterfish sits between you and the system shell it can see the recent command history and output, so contextual questions like "why did that command fail?" work without copying and pasting an error into a chat window — which is the interaction cost that makes most terminal AI tools not worth reaching for. Beyond one-off prompting it ships a Goal Mode, where you state an objective such as running a build and debugging whatever breaks, and Butterfish iterates on commands toward that goal while surfacing each step. A Neovim plugin extends the same model access into the editor. The project documents its architecture openly, including how it proxies API requests and how the shell-to-shell interface is implemented, which matters to developers who are cautious about what a tool with terminal access is transmitting. It works with OpenAI and any OpenAI-compatible endpoint, so self-hosted or alternative providers are supported, and it is distributed as a free open-source CLI for people who work primarily from the command line.
✅ Butterfish is a good choice if you need:
- •Prompt the AI from bash or zsh by starting a command with a capital letter
- •Model sees recent shell history, so 'why did that fail?' works with no copy-paste
- •Goal Mode iterates commands toward a stated objective
- •Neovim plugin for the same model access in the editor
- •Works with OpenAI or any OpenAI-compatible API
💡 Value Assessment
With a free tier available, Butterfish is an easy recommendation for anyone looking to try coding & development tools without financial commitment.
Butterfish Key Features
Butterfish comes packed with features that make it a strong contender in the coding & development space. Here's what you get:
Integrate Butterfish into your own applications and workflows via the API.
Model sees recent shell history, so 'why did that fail?' works with no copy-paste helps you work more efficiently with Butterfish.
Goal Mode iterates commands toward a stated objective helps you work more efficiently with Butterfish.
Neovim plugin for the same model access in the editor helps you work more efficiently with Butterfish.
Integrate Butterfish into your own applications and workflows via the API.
Integrate Butterfish into your own applications and workflows via the API.
Butterfish Alternatives & Their Pricing
Considering alternatives to Butterfish? Here's how competing tools compare on pricing:
TmuxAI
Open SourceTerminal assistant that runs in a tmux pane, reads what is on screen across every pane, and proposes commands you approve before they run.
Pricing: Free and open source; installed with a one-line curl script and developed publicly on GitHub. No commercial tier or hosted plan is published — you supply your own model provider credentials.
Repomix
Open SourcePacks any repo into one AI-friendly file with secret scanning, .gitignore awareness and token counts
Pricing: Free and open source. Available as a CLI, a browser-based packer at repomix.com, a Chrome extension and an MCP server, with no paid tier advertised. Community support runs through GitHub and Discord.
Lovable
FreemiumAI web app builder from natural language prompts
Pricing: Free tier with limited messages. Starter $20/mo, Launch $50/mo, Scale $100/mo
Cursor
FreemiumAI-first code editor with powerful inline generation
Pricing: Free tier. Pro $20/mo, Business $40/user/mo
Kilo Code
FreemiumOpen-source AI coding agent for VS Code, JetBrains, CLI and cloud with zero-markup inference
Pricing: Free and open source for individual developers — the VS Code, JetBrains and CLI extensions cost nothing and usage is billed separately. Teams is $15/user/month with a 14-day free trial, adding usage analytics and reporting, an AI adoption score, shared agent modes, centralised billing, shared BYOK, team management, data privacy controls and priority support. Enterprise adds custom SSO, audit logs, SLA commitments, model and provider restrictions and a shared private gateway, and is priced through sales. Inference is paid separately: free models via the gateway, your own provider keys at no markup, local models, or a Kilo Pass credit subscription. Cloud compute is usage-based and billed apart from inference.
Ready to try Butterfish?
Visit the official website for the latest pricing and to get started.
Frequently Asked Questions
Is Butterfish free to use?
Yes, Butterfish offers a free open-source version that you can use without paying.
How much does Butterfish cost in 2026?
As of 2026, Butterfish pricing is: Free and open source. No paid tier or hosted plan is published; you authenticate with your own OpenAI or OpenAI-compatible API credentials. Visit the official Butterfish website for the most current pricing.
What are the best alternatives to Butterfish?
Popular alternatives to Butterfish include TmuxAI, Repomix, Lovable. Each offers different features and pricing structures. Compare them on AISO Tools to find the best fit for your needs and budget.
Is Butterfish worth the price?
Butterfish offers features like Prompt the AI from bash or zsh by starting a command with a capital letter, Model sees recent shell history, so 'why did that fail?' works with no copy-paste, Goal Mode iterates commands toward a stated objective. Whether it's worth the investment depends on your specific needs, usage volume, and budget. The free tier lets you try it before paying anything.
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