Preview Sophia is still in development. This is an early version, so expect rough edges and changes.

Privacy, license and credits

Last updated 29 October 2026

Privacy

Sophia for Chrome

Your text is checked by code running in your browser. Sophia has no account and no server, and it sends nothing you write anywhere.
It reads only the text you select, or the text box you're typing in, to check it.
Your settings (your name, theme and which checks are on) are kept in your browser's own extension storage. Removing the extension removes them.
Its panel loads two typefaces from Google Fonts. That request asks for fonts, not for your text, and without it Sophia uses your system's fonts.

Sophia for Mac (in development)

Grammar is checked on your Mac, and rewrites use Apple's on-device model. The app contains no networking code at all.
It uses Accessibility permission to read the text field you're in and to apply a fix you accept. Secure fields and password managers are skipped.
Your personal dictionary and settings are files on your Mac in ~/.config/sophia.

This website

No cookies, analytics, trackers, forms or third-party scripts. The page's security policy blocks them outright.
The site is hosted on Cloudflare Pages, and downloads come from GitHub. Like any web host, both handle standard request data (such as your IP address) to serve and protect them.

License

Sophia is open source under the MIT license. You may use, copy, modify and share it, including commercially, as long as the copyright notice comes with it. It is provided "as is", without warranty of any kind. The full text is in the LICENSE file.

Credits

Harper grammar checker (Apache-2.0), in Sophia for Mac.
Sophia for Mac's text-insertion engine comes from Cadence, another DC Labs project (MIT).
Cormorant Garamond and Hanken Grotesk typefaces (SIL Open Font License), in Sophia for Chrome.

Built by DC Labs, a Daniel J. Cuesta company.

Trademarks

Grammarly, LanguageTool, Apple, macOS, Apple Intelligence and Chrome belong to their owners. They're named here only to compare features and to credit the work Sophia uses. Sophia is an independent project and is not affiliated with, sponsored by or endorsed by any of them.

Contact

Questions and bugs: open an issue on GitHub. For a security problem, use Report a vulnerability on the repository's Security tab instead, so the details stay private.