Delta Chat vs Jami
Delta Chat
delta.chat
Jami
jami.netSide by side
| Figure | Delta Chat | Jami |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Encrypted Messaging Apps | 8.3 (#4) | 8.8 (#2) |
| Spec score · Secure Messaging Apps | 8.2 (#11) | 8.8 (#1) |
| Encryption | All messages are end-to-end encrypted by default, and attachments and their metadata are included in the encryption. | Jami states that its communications use end-to-end encryption with perfect forward secrecy and comply with the X.509 standard. |
| Headquarters | Freiburg, Germany | Montreal, Quebec, Canada |
| Platforms | The download page lists Android, iPhone/iPad, macOS, Windows, GNU/Linux, and a community-driven Ubuntu Touch effort. | Official documentation lists GNU/Linux, Windows, macOS, Android, iOS, Android TV and web access. |
| Support | The site links to a Delta Chat forum for support and feedback. | Jami directs users to its forum for questions and lists [email protected] as a contact address. |
| Web client | The FAQ says there are no immediate plans for a Delta Chat web client and points users to portable Windows or Linux AppImage clients when they cannot install software. | Jami Web Preview 1 runs locally with Node.js, is installed from npm, and can be accessed at a local web address. |
Plans
In their own words
Delta Chat
Delta Chat is a free, open-source instant messaging app for mobile and desktop, with support for self-hosting. It runs on Android, iOS, Linux, macOS and Windows, and supports multiple profiles and devices. Messages travel through secure, interoperable chatmail relays and are end-to-end encrypted by default, including attachments and their metadata. Delta Chat uses a subset of OpenPGP with Secure-Join and Autocrypt. Servers can still see sender and receiver addresses and message size; other message, contact and group metadata is encrypted. Chats can include interactive web apps for gaming and collaboration. Android and iOS audio and video calls use peer-to-peer WebRTC, but a March 2026 post said the feature was still behind a debug setting. A classic email address can act as a relay only if used exclusively by chatmail clients, and classic email providers generally do not support push notifications. The FAQ says there are no immediate plans for a web client. The project links to a forum for support and feedback.
Jami
Jami is free/libre software for private messaging and calls, with end-to-end encrypted communications and peer-to-peer connections. It offers instant messaging, audio and video calls, group chats, and recorded audio and video messages. Users can hold video conferences and create rendezvous points without third-party hosting, as well as share files or screens and stream media. Jami says it does not require a server to relay data between users; it also states that communications use perfect forward secrecy and comply with the X.509 standard. One account can link multiple devices, and account creation does not require personal information. Jami can also function as a regular SIP client. Optional extensions include green screen, watermark, auto answer, local AI transcription, audio filter, and video segmentation. These extensions are unavailable to iOS users, and features vary by client. Platforms listed include Android, iOS, Linux, macOS, web, and Windows, along with API and extension access. Jami also provides an OpenClaw channel plugin; bot accounts and API access are supported on desktop Linux, macOS, and Windows. The project is led by Savoir-faire Linux Inc. and supported by a global community of free software contributors.