BYOAIK — Bring Your Own AI Key: a directory of AI tools that run on your own API key.

Windmill

Open-source developer platform that turns scripts into workflows, APIs, and UIs, with bring-your-own-key AI codegen.

Category:: Agent Frameworks
Pricing:: Open Source
Open source:: Yes (AGPL-3.0 (community edition; mixed with Apache-2.0 for specs/APIs and a proprietary license for enterprise features))
Self-hostable:: Yes
Local-first:: Yes
Platforms:: Web, Self-hosted, CLI, Docker
AI providers (bring your own key):: OpenAI, Anthropic, Google Gemini, Azure OpenAI, OpenRouter, Groq, Mistral, DeepSeek, Together AI, Ollama, Custom / OpenAI-compatible
API key storage:: Configured by environment variable
Key risk level:: LOW
Trust score:: 88/100

Windmill is an open-source developer platform and workflow engine that turns scripts (Python, TypeScript, Go, Bash, SQL, and more) into webhooks, scheduled jobs, multi-step workflows, and auto-generated internal UIs/apps. It positions itself as an open-source alternative to Retool and Temporal. Its AI features (Windmill AI) provide code generation, flow generation, and AI agent steps inside workflows. AI is BYOK: an admin enables it in the workspace settings 'Windmill AI' tab by adding a model resource containing their own provider API key/endpoint (also configurable instance-wide by superadmins). Supported providers include OpenAI, Azure OpenAI, Anthropic, Mistral (Codestral), DeepSeek, Google Gemini, Groq, OpenRouter, Together AI, AWS Bedrock, and 'Custom AI' for any OpenAI-compatible base URL + API key (including local Ollama). Self-hosted Community Edition is free under AGPLv3; cloud and enterprise tiers add paid features.

How your API key is handled

Your API key is supplied via an environment variable or local config file. Requests are sent directly to the AI provider. Because it can be self-hosted, your key never has to touch a third-party backend.

Setup

Install the tool, set your provider API key as an environment variable (or in its config file), and pick a model.