Signal vs Telegram: Which Messaging App Is Actually More Private?

Fact-checked by the SnapMessages editorial team

When comparing Signal vs Telegram for privacy in July 2025, Signal wins clearly — but the full picture is more nuanced than a simple ranking. Signal encrypts every conversation by default using the Signal Protocol, which is widely regarded as the gold standard in encrypted messaging. Telegram, by contrast, stores the vast majority of messages on its own servers unencrypted unless users manually activate Secret Chats.

Privacy concerns around messaging apps have surged in recent years. A Pew Research Center report found that 79% of Americans are concerned about how companies use their data — and messaging apps sit at the center of that concern. With governments worldwide pushing for backdoors into encrypted apps, choosing the right platform has never mattered more.

This guide is for anyone trying to decide between Signal and Telegram for private communication — whether you are a journalist, activist, privacy-conscious individual, or simply someone who wants their conversations to stay personal. By the end, you will understand exactly how each app handles encryption, metadata, data storage, and government requests.

Step 1: How Does Signal’s Encryption Compare to Telegram’s Encryption?

Signal uses end-to-end encryption on every single message, call, and file transfer by default. Telegram only applies end-to-end encryption in a special mode called Secret Chats — its standard cloud-based chats use server-side encryption, which means Telegram itself can read your messages.

How Signal’s Encryption Works

Signal uses the Signal Protocol, a cryptographic system developed by Open Whisper Systems that combines several techniques: the Double Ratchet Algorithm, Curve25519 key exchange, and AES-256 encryption. This means even if an attacker intercepts your messages in transit, they cannot decrypt them. The keys live only on your device — not Signal’s servers.

Every conversation — one-on-one, group chat, voice call, and video call — is automatically end-to-end encrypted with no opt-in required. According to Signal’s technical documentation, the server never has access to message content, sender identity within a group, or call metadata.

How Telegram’s Encryption Works

Telegram uses its own proprietary encryption protocol called MTProto. Standard Telegram chats — including all group chats and channels — are encrypted between your device and Telegram’s servers. That means Telegram’s infrastructure can access and read the content of those messages.

Secret Chats activate end-to-end encryption, but they come with major limitations. They cannot be used in group conversations, they do not sync across devices, and they leave no cloud backup. For most users who never activate Secret Chats, Telegram functions closer to a cloud-storage service than a private messenger.

Step 2: How Much Data Does Signal Collect vs Telegram?

Signal collects almost no user data, while Telegram collects significantly more — including your phone number, contacts, IP address, and device information. The difference in metadata practices is just as important as encryption when evaluating real-world privacy.

What Signal Stores About You

Signal’s data collection is minimal by design. The app requires a phone number to register, but it uses a system called Sealed Sender to hide sender metadata even from Signal’s own servers during message transmission. When the U.S. Department of Justice subpoenaed Signal in 2021, the company could only provide two data points: the date an account was created and the last date it connected to Signal’s servers. No messages, no contacts, no groups — nothing else existed to hand over.

Signal also introduced usernames in 2024, allowing users to communicate without sharing their phone numbers with other users, further reducing the personal information exposed during conversations.

What Telegram Stores About You

Telegram collects your phone number, contacts list, IP address, device type, and all messages sent through standard (non-Secret) chats. According to Telegram’s Privacy Policy, it retains this data and may disclose it to authorities “to prevent terrorism” under court order. Telegram stores cloud chat messages indefinitely unless you manually delete them.

Understanding message metadata is a crucial part of digital privacy. If you want a deeper look at what metadata reveals about you, the SnapMessages guide on what message metadata is and who can see it covers this topic in detail.

Step 3: Is Signal Open-Source and Has It Been Independently Audited?

Signal is fully open-source — both the client apps and the Signal Protocol library are publicly available on GitHub and have been independently audited multiple times. Telegram’s client apps are open-source, but its server-side code is closed and cannot be independently verified.

Why Open-Source Matters for Privacy

When an app’s code is open-source, independent security researchers can inspect it for backdoors, vulnerabilities, or deceptive practices. If they find a problem, they publish it publicly. This accountability mechanism is foundational to trustworthy security software.

Signal’s protocol has been audited by multiple independent researchers, including a widely cited 2016 analysis published by cryptographers at the University of Oxford and Queensland University of Technology, which found the Signal Protocol to be cryptographically sound. The protocol is also used by WhatsApp, Google Messages, and Meta’s Messenger for their encrypted modes — a testament to its industry acceptance.

The Problem With Telegram’s Closed Server Code

Telegram makes its client-side app code available, but the server code that actually stores and routes your messages is proprietary and not open to inspection. This means no independent researcher can verify what Telegram actually does with your messages on its servers. You are required to trust Telegram’s word — which is a significant risk for high-stakes privacy use cases.

Telegram’s custom MTProto protocol has also faced criticism from cryptographers. While Telegram has updated it over the years, the Electronic Frontier Foundation has consistently warned that rolling your own cryptography — rather than using established, peer-reviewed protocols — introduces unnecessary risk.

Step 4: What Happens If Law Enforcement Requests Your Data From Signal or Telegram?

Signal cannot provide message content to law enforcement because it does not have it. Telegram can — and has — provided user data to governments in certain cases, particularly after the arrest of its founder in 2024 prompted a shift in its cooperation policy.

Signal’s Legal Track Record

Signal has a documented history of receiving government subpoenas and producing virtually nothing. Because the encryption architecture means Signal’s servers never hold decryptable message content, there is nothing to hand over. Signal has published every government data request it has received, and in each case the response was the same: account creation date and last connection time only.

This architecture-based privacy is more reliable than a company’s privacy policy promises. Even if Signal wanted to cooperate fully with authorities, it is technically incapable of providing message content. That is a meaningful distinction.

Telegram’s Shifting Stance on Law Enforcement

Telegram’s founder, Pavel Durov, was arrested in France in August 2024 on charges related to insufficient content moderation. Following that event, Telegram updated its policies and confirmed it would share user IP addresses and phone numbers with authorities when presented with valid legal requests — a significant change from its previous near-absolute refusal to cooperate.

For standard cloud chats, Telegram technically has the capability to provide message content, though the company claims it separates encryption keys geographically to complicate single-jurisdiction requests. The reliability of this claim cannot be independently verified because the server code is closed-source.

If you are concerned about broader surveillance of your communications, the SnapMessages guide on how to tell if your messages are being monitored is a useful companion resource.

Step 5: Does Telegram’s Extra Features Come at a Privacy Cost?

Yes — Telegram’s richer feature set comes directly at the expense of privacy. The features that make Telegram popular — large group channels, cloud sync across devices, bots, and massive file sharing — are architecturally incompatible with end-to-end encryption.

Telegram’s Feature Advantages

Telegram supports channels with unlimited subscribers, group chats with up to 200,000 members, file sharing up to 2 GB per file, and seamless message sync across every device you own. It also supports bots, polls, and a full-featured API that developers can build on. These capabilities make Telegram an attractive choice for communities, media organizations, and teams.

For users who want to coordinate large groups or share large files, Telegram is genuinely more capable than Signal. If you are comparing broader messaging app options, the SnapMessages breakdown of Telegram vs WhatsApp covers how Telegram stacks up in feature-to-feature comparisons.

Why These Features Require Compromising Privacy

Cloud sync requires Telegram to store your messages on its servers in a readable form. Large public channels require centralized message storage so new subscribers can see historical content. Bots require server-side processing of message content. Each of these features requires Telegram to hold your data in a way that end-to-end encryption would prevent.

Signal’s design philosophy is the opposite: the company deliberately limits features to preserve privacy. Signal does not support public channels, has limited bot functionality, and restricts group sizes — all intentional trade-offs to maintain full end-to-end encryption for every user.

Step 6: Which App Should You Use — Signal or Telegram?

Choose Signal if privacy is your primary concern. Choose Telegram if community features, large group chats, or cross-device cloud sync are more important to you than airtight encryption. Both decisions are legitimate — but they should be made with full knowledge of what each app actually provides.

When to Choose Signal

Signal is the right choice for anyone whose primary goal is private communication. This includes journalists communicating with sources, activists in politically sensitive environments, healthcare professionals sharing patient-adjacent information, legal professionals discussing client matters, or anyone who simply does not want a tech company storing their private conversations.

Signal is also worth using if you share sensitive files, discuss finances, or talk about anything you would not want exposed in a data breach or government request. The SnapMessages guide on how to secure your personal data after a data breach explains why app choice is a critical first line of defense.

When Telegram May Be Acceptable

Telegram makes sense when you need its unique capabilities: managing a large community, running a public channel, sharing large files without compression, or coordinating with a team that is already on the platform. Its features genuinely have no Signal equivalent.

For users who want private one-on-one chats within Telegram, activating Secret Chats is essential — but understand that this is opt-in, device-specific, and not available for groups. You may also want to explore how to set up a Secret Chat on your phone for step-by-step instructions on enabling Telegram’s most private mode.

What to Do Right Now

• Download Signal from the official Signal website and set up a username so you do not need to share your phone number with contacts.
• Enable disappearing messages in Signal as your default — go to Settings, then Privacy, then Default Timer.
• If you use Telegram, review which chats contain sensitive information and consider migrating those conversations to Signal.
• Enable two-step verification on both apps to prevent unauthorized account access. The SnapMessages guide on two-factor authentication for messaging apps walks you through enabling it on both platforms.
• Audit your Telegram linked devices regularly under Settings, then Devices, to ensure no unauthorized sessions are active.

Frequently Asked Questions

Is Signal actually more private than Telegram, or is that just marketing?

Signal is genuinely more private than Telegram — this is not marketing, it is a verifiable technical difference. Signal encrypts every message end-to-end by default and stores no readable content on its servers. Telegram’s standard chats are stored on its servers in a form it can access. This has been confirmed through court subpoenas, independent audits, and Telegram’s own privacy policy.

Can Telegram read my messages?

Yes, Telegram can read standard cloud messages — and this is confirmed by its own architecture. All regular Telegram chats, including all group chats and channels, are stored on Telegram’s servers using server-side encryption, meaning Telegram holds the decryption keys. Only Secret Chats use end-to-end encryption that prevents Telegram from accessing content. According to Telegram’s Privacy Policy, it may share data with authorities under certain legal conditions.

Does Signal require a phone number, and is that a privacy risk?

Signal requires a phone number to register, but since 2024 it allows users to set a username so contacts can reach you without knowing your number. The phone number used for registration is stored on Signal’s servers, but Signal does not share it with your contacts if you use a username. For maximum anonymity, some users register Signal with a temporary number — our guide on what a burner phone number is explains how this works.

Which app is safer for journalists or activists?

Signal is significantly safer for journalists, activists, and anyone in a high-risk privacy situation. The Electronic Frontier Foundation explicitly recommends Signal for sensitive communications. Telegram’s closed server code, metadata collection, and non-default encryption make it unsuitable for situations where message confidentiality is critical.

What happened to Telegram’s privacy after Pavel Durov’s arrest?

After Telegram founder Pavel Durov was arrested in France in August 2024 on content moderation charges, Telegram updated its policies to share user IP addresses and phone numbers with law enforcement when presented with valid legal orders. TechCrunch reported that Telegram disclosed data on thousands of users in the months following the arrest — a sharp reversal from its historically minimal cooperation with authorities.

Should I use Signal or Telegram for a group chat with my family or friends?

Signal is the better choice for private group chats. Signal encrypts group conversations end-to-end by default — Telegram group chats are never end-to-end encrypted, regardless of size. For casual social groups where privacy is not a concern, Telegram’s richer features (larger groups, reactions, polls) may be preferable. But for any group discussing personal, financial, or sensitive matters, Signal is the clear choice.

Can police or government agencies access my Signal messages?

In practice, no. Signal cannot provide message content to law enforcement because it does not store it. When subpoenaed, Signal has only been able to produce an account creation date and last login timestamp. This is a technical limitation, not a policy choice — the encryption architecture makes it impossible for Signal to hand over message content even if legally compelled to do so.

Is Telegram end-to-end encrypted for voice calls?

Telegram voice calls between two individuals are end-to-end encrypted using its MTProto protocol. However, Telegram group voice calls are not end-to-end encrypted. Signal encrypts all calls — both one-on-one and group — end-to-end by default, making it the stronger choice for private audio and video communication across the board.

What is the difference between Signal vs Telegram in terms of disappearing messages?

Both apps support disappearing messages, but Signal’s implementation is broader and easier to use. Signal allows you to set a default disappearing message timer for all new conversations — options range from 30 seconds to 4 weeks. Telegram supports self-destructing messages only in Secret Chats, not in standard group or cloud chats. Signal also introduced a “Note to Self” disappearing message feature for personal reminders.

Is Telegram safe for sending sensitive documents or files?

Telegram is not safe for sending sensitive documents through standard chats. Files sent in regular Telegram chats are stored on Telegram’s servers unencrypted and can be accessed by Telegram or disclosed to authorities. For sensitive document sharing, use Signal — files shared through Signal are end-to-end encrypted and are not stored on Signal’s servers after delivery. For broader device security context, see our guide on how to tell if your phone has been hacked.