Signal vs Telegram: Different Products, Not Just Different Brands
Signal and Telegram are the two most-talked-about "secure messengers" — but they have very different security models. Signal encrypts everything by default; Telegram does not. Telegram's "Secret Chats" feature is opt-in and doesn't extend to groups. This page breaks down exactly where each one wins and where each one quietly loses.
Side-by-side comparison
| Dimension | Signal | Telegram |
|---|---|---|
| Founded | 2014 | 2013 |
| Owner | Signal Foundation (US nonprofit) | Telegram Messenger LLP (UAE) |
| Business model | Free, donation-funded | Free + Premium subscription |
| Default encryption | ★ E2EE on every chat | Server-side only — NOT E2EE by default |
| Secret / Secret Chat mode | ★ Always-on (no opt-in needed) | Must be enabled per conversation, no group support |
| Encryption protocol | Signal Protocol (Double Ratchet) | MTProto (E2EE only in Secret Chats) |
| Open source | ★ Yes — clients + server | Clients partly open source; servers closed |
| Independent audits | ★ Multiple, ongoing | No public audits of MTProto encryption stack |
| Phone number required | Yes (username option since 2024) | Yes |
| Platforms | iOS / Android / Web / Desktop | iOS / Android / Web / Desktop |
| Group size limit | 1,000 members | ★ 200,000 members (channels) |
| Voice / video calls (E2EE) | ★ Yes (E2EE) | Voice calls E2EE; video calls not yet end-to-end |
| Disappearing messages | Yes, custom timers | Yes, in Secret Chats only |
| Approximate monthly users | ~70 million | ★ ~900 million |
| Bots / public channels | Limited | ★ Industry-leading — public channels + bots platform |
| Server location | United States | Distributed globally; HQ in Dubai |
★ marks the dimension where one app clearly wins.
Data sources: Signal official, Telegram Privacy Policy, apps reviewed July 8, 2026.
Who should pick which
Choose Signal if…
- You need every chat, group, and call to be end-to-end encrypted by default — no opt-in settings to forget
- You're a journalist, activist, lawyer, or anyone whose threat model includes adversaries who can subpoena servers
- You want an open-source client AND server, with public audits
- You're fine giving your phone number at signup
- You don't need 200,000-member public broadcast channels
Choose Telegram if…
- You need huge public broadcast channels (up to 200K members) or the bots / automation platform — no one else comes close
- You want cloud sync across unlimited devices and instant search through years of chat history
- Speed on slow networks matters more than encryption-by-default
- You're aware that you need to manually turn on "Secret Chats" for any conversation that genuinely needs E2EE
- Your threat model isn't "foreign government adversary" but rather "data broker scraping"
The encryption difference that matters most
Both apps are marketed as "secure", but they implement security very differently. Understanding this distinction is the single most important thing to take away from this comparison.
Signal: end-to-end is the default
Signal turns on end-to-end encryption for every chat, group chat, voice call, and video call. There is no opt-in toggle — the encryption is the protocol. The Signal Protocol (Double Ratchet algorithm) is so well-audited that WhatsApp, Google Messages, and Skype all licence it. The client and server code are public on GitHub.
This means Signal's servers can never read your messages, and there is no way to accidentally send a message without E2EE. The trade-off is that some "extra" features — public channels, large broadcast groups, bots — are intentionally absent because they don't fit the privacy-first model.
Telegram: encryption is opt-in and per-conversation
Telegram uses server-side encryption by default, which means Telegram's servers CAN read the contents of your chats. For end-to-end encryption you have to manually turn on a "Secret Chat" — and that choice has to be made for every conversation. Group chats on Telegram are never end-to-end encrypted, full stop.
Telegram's encryption protocol is called MTProto. While MTProto itself has been analyzed academically, Telegram's server stack is closed source and there is no comprehensive third-party audit equivalent to what Signal undergoes. For a service that markets itself as privacy-first, the default is closer to a "regular" cloud messenger like Discord or Facebook Messenger than to a true E2EE messenger.
Where Telegram wins — honestly
Telegram has features that no E2EE messenger has matched:
- 200,000-member public channels for broadcasting — news outlets, communities, crypto groups, sports coverage
- Bots platform with full HTTP API for payment, automation, customer support
- Cloud sync across unlimited devices — log in on a new phone and your entire chat history is there instantly
- Speed on slow networks — Telegram is famously fast, with smaller client apps and aggressive caching
- Voice rooms and video notes — audio/video that feels more like a social app
These are not small features. They are the reason Telegram has roughly 900 million monthly active users, while Signal has roughly 70 million. Many people use Telegram for the channel-and-bots ecosystem and then complain about the lack of encryption — and that complaint is fair. Telegram decided to optimize for media-and-broadcast first, encryption second.
Where Signal wins — privacy is the entire point
Signal is designed for the case where you actually need encrypted messaging — and only that. There is no growth team chasing features. There are no ads and no commercial pressure to monetize. The nonprofit funding model means Signal is free for users forever, with no investor pressure.
If your threat model is "I don't want my messages readable by the messenger's employees or any third party with access to their servers", Signal is the right default. If your threat model is "I want to participate in a 100,000-person channel for breaking news", Telegram wins.
Verdict
These are not interchangeable products pretending to compete on the same axis. Signal is the gold-standard encrypted-by-default messenger. Telegram is the cloud-first, channel-and-bot-first messenger that happens to also offer encryption as an opt-in feature.
If you don't already know why you need E2EE, you should pick Signal. If you specifically need Telegram-class broadcast / bots / cloud features and understand the encryption trade-off, Telegram is the right tool for that job. Many privacy-conscious users keep both installed.
For a fuller look at how Signal compares to a paid, anonymous-by-default messenger, see our Signal vs Threema comparison.