- Simon Rupf - current developer and maintainer
- rugk - security review, doc improvment, JS refactoring & various other stuff
- R4SAS - python client, compression, blob URI to support larger attachments
- Sébastien Sauvage - original idea and main developer
- Alexey Gladkov - syntax highlighting
- Greg Knaddison - robots.txt
- MrKooky - HTML5 markup, CSS cleanup
- Simon Rupf - WebCrypto, unit tests, container images, database backend, MVC, configuration, i18n
- Hexalyse - Password protection
- Viktor Stanchev - File upload support
- azlux - Tab character input support
- Adam Fisher - old Favicons
- rugk - new logo/icons
- Sobak - PSR-4 and PSR-2 refactoring
- Nathaniel Olsen - jQuery upgrade
- Alexander Demenshin - modal password dialog
- PunKeel - first docker container
- thororm - Display of video, audio & PDF, drag & drop, preview of attachments
- Harald Leithner - base58 encoding of key
- Haocen - lots of bugfixes and UI improvements
- Lucas Savva - configurable config file location, NixOS packaging
- rodehoed - option to exempt ips from the rate-limiter
- Mark van Holsteijn - Google Cloud Storage backend
- Austin Huang - Oracle database support
- Hexalyse - French
- Kuba Niewiarowski - Polish
- Gabbalo - German
- Draky50110 - French
- Filip Muki Dobranić - Slovene
- Jiawei Zhou - Chinese
- Stefano Marty - Italian
- R4SAS - Russian
- Alfredo Fabián Altamirano Tena - Spanish
- Quent-in - Occitan
- idarlund - Norwegian
- Tulio Leao - Portuguese
- Michael van Schaik - Dutch
- Péter Tabajdi - Hungarian
- info-path - Czech
- BigWax - Bulgarian
- AndriiZ - Ukrainian
- Yaron Shahrabani - Hebrew
- Moo - Lithuanian
- whenwesober - Indonesian
- retiolus - Catalan
- sarnane - Estonian
- foxsouns - Lojban
- Patriccollu di Santa Maria è Sichè - Corsican
- Markus Mikkonen - Finnish
- Emir Ensar Rahmanlar - Turkish