Open Source Credits
Last updated 2 October 2026Effective 26 September 2026
Software
Viremail is our own code, built on these open-source projects. We are grateful to their authors.
| Component | Licence | Copyright holder |
|---|---|---|
| React, React DOM | MIT | Meta Platforms, Inc. and contributors |
| React Router | MIT | React Training LLC, Remix Software and Shopify |
| Tiptap editor | MIT | Tiptap GmbH |
| ProseMirror | MIT | Marijn Haverbeke and others |
| Yjs, y-protocols, y-indexeddb, lib0, y-tiptap | MIT | Kevin Jahns and contributors |
| Floating UI | MIT | Floating UI contributors |
| Linkify | MIT | Nick Frasser |
| Vite | MIT | Evan You and contributors |
| Lucide icons | ISC; some icons from Feather, MIT | Lucide contributors, Cole Bemis |
| Express, express-session, multer | MIT | TJ Holowaychuk and the Express contributors |
| Helmet | MIT | Adam Baldwin, Evan Hahn and contributors |
| ImapFlow, Nodemailer, Mailparser, PostalMime, libqp, libbase64 | MIT / MIT-0 | Andris Reinman, Postal Systems OÜ |
| OpenPGP.js | LGPL-3.0-or-later | Proton AG and contributors |
| SimpleWebAuthn | MIT | Matthew Miller |
| ical.js | MPL-2.0 | Philipp Kewisch and contributors |
| web-push | MPL-2.0 | Marco Castelluccio and contributors |
| DOMPurify | Apache-2.0 (offered as MPL-2.0 or Apache-2.0) | Cure53 and contributors |
| sanitize-html | MIT | Apostrophe Technologies, Inc. |
| ws | MIT | Einar Otto Stangvik and contributors |
| undici | MIT | Node.js contributors |
| qrcode | MIT | Ryan Day |
| noble-curves (X25519, for browsers without it built in) | MIT | Paul Miller |
| iconv-lite | MIT | Alexander Shtuchkin |
| dotenv | BSD-2-Clause | dotenv contributors |
OpenPGP.js is used unmodified under the GNU Lesser General Public License. You can get its source code, and replace it with your own build, from the project's repository linked above. Programs under the Mozilla Public License are also used unmodified, and their source is available from the links above.
This table lists the main projects. The full list of third-party notices names every package in the app and on our servers, with its licence text.
Fonts, images and avatars
| Component | Licence | Copyright holder |
|---|---|---|
| Inter typeface | SIL Open Font License 1.1 | Rasmus Andersson |
| Default avatars (Notionists, Lorelei, Thumbs styles) | CC0 1.0 (public domain); DiceBear library MIT | DiceBear and the style authors |
| Sign-in background photos | Unsplash License | Alexey Topolyanskiy, Philippe Wuyts, Andrew Ridley, Go Wild, Andrew Coelho, Christian Joudrey, Steve Carter, Joseph Barrientos, Stefan Kunze and Kevin Young, on Unsplash |
| Lock screen and desktop sign-in photos | Unsplash License | Paul Jarvis, Alexey Topolyanskiy, Andrew Ridley, Ales Krivec and Stefan Kunze, on Unsplash |
| GIFs in Pinglar | Shown under the KLIPY API terms | Their respective owners, found through KLIPY |
| Photos placed in Pintas designs | CC0 or Public Domain Mark (Openverse), or the Pexels, Unsplash or Pixabay licence | Their photographers; each photo keeps its own credit in the design |
| Emoji table for call security codes | Apache License 2.0 | The Matrix.org Foundation C.I.C. |
The Viremail logo, the icons of the office apps, the Pinglar stickers, the illustrations and the ringtones are original work by Svayam Incarnation Limited. Emoji are shown with your own device's emoji font.
Names and trademarks
Viremail, its V symbol and its interface are original work by Svayam Incarnation Limited. Other product names mentioned in Viremail, for example in the import and export options and in our help pages, are the property of their owners and are used only to describe compatibility.