Delta Chat vs Keet
Delta Chat
delta.chat
Keet
keet.ioSide by side
| Figure | Delta Chat | Keet |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Encrypted Messaging Apps | 8.3 (#4) | 8.0 (#16) |
| Spec score · Secure Messaging Apps | 8.2 (#11) | 8.0 (#15) |
| Calls | Audio and video calls on Android and iOS use peer-to-peer WebRTC with signaling through Delta Chat messages; the March 2026 post says the feature was still behind a debug setting. | Keet supports direct and group voice calls, video calls, and desktop screen sharing during calls. |
| Headquarters | Freiburg, Germany | San Salvador, El Salvador |
| Platforms | The download page lists Android, iPhone/iPad, macOS, Windows, GNU/Linux, and a community-driven Ubuntu Touch effort. | Keet's installation guide lists Windows, macOS, Linux, Android, iOS, and GrapheneOS; the official download page provides desktop downloads and an Android APK. |
| Product | Delta Chat is a reliable, decentralized and secure instant messaging app for mobile and desktop. | Keet is a peer-to-peer messaging app for chats, audio and video calls, and media sharing. |
| Support | The site links to a Delta Chat forum for support and feedback. | Keet directs users with issues opening the app or joining groups to [email protected] and offers community groups for help and feedback. |
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.