Privacy comparison · 2026
Signal vs Telegram
Signal and Telegram are often weighed against each other. This side-by-side compares how each protects you by default, whether the code can be inspected, who runs it, and how to pick the more private option.
Side by side
| Signal | Telegram | |
|---|---|---|
| Type | Messaging app | Messaging app |
| Default protection | End-to-end by default for all chats and calls | Not end-to-end by default (only opt-in Secret Chats are) |
| Open source | Yes | Partial |
| Operator | Signal Foundation (non-profit) | Telegram FZ-LLC |
| Jurisdiction | United States (non-profit foundation) | Operated internationally (registered in Dubai, UAE) |
| Cost | Free | Free (optional paid Premium tier) |
Signal
Signal encrypts every message, call and attachment end-to-end using the open Signal Protocol, which is also used under the hood by several other apps. The apps and the protocol are open source, and the Signal Foundation is funded by donations and grants rather than advertising.
Privacy strengths
- ✓Every chat, group and call is end-to-end encrypted by default
- ✓Open-source clients and protocol that can be independently audited
- ✓Stores very little metadata — no ad profile is built from your activity
- ✓Disappearing messages and per-chat controls are built in
Caveats
- !Requires a phone number to register (though usernames can hide it from contacts)
- !Smaller network than mainstream apps, so contacts may not be on it yet
Telegram
Telegram stores your regular chats in its cloud so they sync across devices. Those cloud chats are encrypted between you and Telegram’s servers, but Telegram can technically access them. End-to-end encryption is only applied to opt-in one-to-one Secret Chats. The client apps are open source; the server is proprietary.
Privacy strengths
- ✓Large channels, bots and big group features
- ✓Open-source client apps
- ✓Optional Secret Chats add end-to-end encryption for one-to-one messages
Caveats
- !Default cloud chats are NOT end-to-end encrypted — Telegram can technically access them
- !Group chats are never end-to-end encrypted
- !The server software is closed source
Frequently asked questions
What is the difference between Signal and Telegram?
Signal: Signal is an end-to-end encrypted messaging app run by a non-profit foundation, designed to collect as little metadata as possible. Telegram: Telegram is a cloud-based messaging app whose ordinary chats are encrypted in transit and at rest but are not end-to-end encrypted by default.
Which is more private by default, Signal or Telegram?
Signal — End-to-end by default for all chats and calls. Telegram — Not end-to-end by default (only opt-in Secret Chats are). Choose based on which default matches how you use it.
Are Signal and Telegram open source?
Signal: yes, open source. Telegram: partly open source.
Is Signal really private?
Signal end-to-end encrypts all messages and calls by default and is engineered to hold minimal metadata, which is why it is widely recommended by security researchers.
Are Telegram chats end-to-end encrypted?
Only opt-in Secret Chats are end-to-end encrypted. Regular cloud chats and all group chats are encrypted to Telegram’s servers but not end-to-end, so Telegram can technically access them.
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