[ Licenses ]
We use a combination of open data and open source software, along with licensed third-party sources and our own private data and systems built for accuracy.
Data Sources
- IP Geolocation by DB-IP, licensed under CC BY 4.0, modified. [ DB-IP ] [ CC BY 4.0 ]
Open Source Software
- argon2id, Copyright © 2022 Proton AG, Copyright © 2017 Emil Bay [ MIT ]
- Chart.js, Copyright © 2014-2024 Chart.js Contributors [ MIT ]
- dijkstrajs, Copyright © 2008 Wyatt Baldwin [ MIT ]
- fflate, Copyright © 2026 Arjun Barrett [ MIT ]
- hash-wasm, Copyright © 2020 Dani Biró [ MIT ]
- highlight.js, Copyright © 2006 Ivan Sagalaev [ BSD-3-Clause ]
- Leptonica, Copyright © 2001-2020 Leptonica [ BSD-2-Clause ]
- marked, Copyright © 2018 MarkedJS, Copyright © 2011-2018 Christopher Jeffrey [ MIT ]
- noble-ciphers, noble-curves and noble-hashes, Copyright © 2022-2023 Paul Miller [ MIT ]
- OpenPGP.js, Copyright © Recurity Labs GmbH, Proton AG and OpenPGP.js contributors [ LGPL-3.0 ]
- pako, Copyright © 2014-2017 Vitaly Puzrin and Andrei Tuputcyn [ MIT ] [ Zlib ]
- PDF.js, Copyright © Mozilla Foundation [ Apache-2.0 ]
- pdf-lib, Copyright © 2018-2019 Andrew Dillon [ MIT ]
- ProggyClean, Copyright © 2004, 2005 Tristan Grimmer [ MIT ]
- qrcode, Copyright © 2012 Ryan Day [ MIT ]
- Roboto Mono, Copyright © 2015 The Roboto Mono Project Authors [ OFL-1.1 ]
- Tesseract OCR and tessdata [ Apache-2.0 ]
- tesseract-wasm, Copyright © 2022 Robert Knight and tesseract-wasm contributors [ BSD-2-Clause ]
- unbzip2-stream, Copyright © 2017 Jan Boelsche, Copyright © 2011 antimatter15 [ MIT ]
- unpdf, Copyright © 2023 Johann Schopplich [ MIT ]
- UPNG.js, Copyright © 2017 Photopea [ MIT ]
- web-stream-tools, Copyright © 2018 Proton Technologies AG [ MIT ]