Open Source Licenses

Whichi is built on open-source software. We're grateful to the community.

💙 Built on Open Source

Whichi is proprietary software, but it's built upon powerful open-source foundations:
Dyad (Apache License 2.0) and Spec Kit (MIT License).

The Whichi application itself, including its branding and proprietary features, is not open source.

Dyad - Apache License 2.0

Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/

Copyright 2025 Dyad Contributors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Dyad is the open-source core app builder that powers Whichi. Apache 2.0 allows commercial use, modification, and distribution with patent protection.

Spec Kit - MIT License

MIT License

Copyright (c) 2025 Spec Kit Contributors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Spec Kit is the Spec-Driven development toolkit used by Whichi. MIT License is highly permissive—use it freely, even in proprietary projects.

Third-Party Open Source Dependencies

Whichi stands on the shoulders of giants. We use many open-source libraries, each with its own license:

Electron

Cross-platform desktop framework

MIT

React

UI library

MIT

Next.js

React framework

MIT

Node.js

JavaScript runtime

MIT

Tailwind CSS

Utility-first CSS framework

MIT

Vite

Build tool

MIT

TypeScript

Typed JavaScript

Apache 2.0

Supabase JS

Backend client library

MIT

Capacitor

Native app runtime

MIT

For a complete list of dependencies and their licenses, see the package.json files in the GitHub repository.

Contributing to Open Source Components

While Whichi itself is proprietary, the underlying Dyad and Spec Kit projects welcome open-source contributions!

  • Report bugs: Submit issues for Dyad or Spec Kit on their respective repositories
  • Join discussions: Discord Community
  • Share your apps: Show what you've built with Whichi on Twitter with #WhichiApp

Contributions to Dyad are licensed under Apache 2.0, and contributions to Spec Kit are licensed under MIT.

AI Provider Notices

When using BYOK (Bring Your Own Key), you interact directly with third-party AI providers. Each has its own terms and licenses:

Questions about licenses? Contact: legal@whichi.app