Humanizer
When Speakfold rewrites a draft so it sounds like the person who will post it, it follows Humanizer by Siqi Chen, version 3.1.0 (225a6f3, 2026-09-27), used under the MIT License. Speakfold adds its own rules on top and checks every rewrite in code. Humanizer’s patterns come from Signs of AI writing, a guide maintained on Wikipedia by WikiProject AI Cleanup.
MIT License Copyright (c) 2025 Siqi Chen 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.
Fonts
These fonts are used under the SIL Open Font License, version 1.1.
| Font | Copyright | Source |
|---|---|---|
| Instrument Sans | Copyright 2022 The Instrument Sans Project Authors | github.com/Instrument/instrument-sans |
| Instrument Serif | The Instrument Serif Project Authors | github.com/Instrument/instrument-serif |
| Geist and Geist Mono | The Geist Project Authors (Vercel) | github.com/vercel/geist-font |
| Caveat | Google Inc. | github.com/googlefonts/caveat |
Software
Speakfold runs on open-source libraries, among them Next.js, React, Drizzle ORM and PGlite, each under its own license (mostly MIT and Apache 2.0). Their notices ship with their code. To ask about any of them, write to the address in the privacy policy.