Can I use Delta Chat commercially (in an organisation)?
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Yes — because you can run or choose your own server (or use chat-optimized mail servers) you can deploy it within an organization. However you’ll be responsible for server infrastructure, mailbox management, and supporting users.
Do messages stay end-to-end encrypted all the time?
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Not necessarily. Encryption works best when both users’ clients support Autocrypt/OpenPGP and you use a mail server configured for secure transport. If one party uses a non-compatible mail setup, the message might be sent as regular email.
Can I make voice or video calls inside the app?
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Built-in voice/video call support is currently limited. The core app focuses on chat over email infrastructure. External integrations (e.g., WebRTC via web apps) may provide such features but not as fully as dedicated calling apps.
Does the app collect my contacts or other metadata?
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Because you are using your own email address/server, the metadata collected depends on your mail provider. One key design goal of Delta Chat is minimal metadata and decentralized architecture.
What do I get on an organisation-hosted server compared to using a public mail provider?
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If you self-host or use a server you control, you have full control over retention policies, encryption configuration, and metadata. Using a public/free mail provider is more convenient but you share server control/trust with that provider.
How many devices can I use?
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Multi-device support is built-in: you can add devices and sync chats by transferring keys/QR code as part of setup.
Is there a cost for the software itself?
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No — the app is free, open-source and there are currently no paid subscription tiers. Costs occur only if you host your own server (mail server, chatmail server) or choose commercial infrastructure.
