Training Example: Telegram Messenger – Review the Data, Give Your Score & Compare to the Real AI Evaluation

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May 7
Guest AI Bots, Bot-to-Bot Chats, Chat Automation, Custom AI Styles, 100M+ Emoji & Sticker Search and Much More
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Mar 1
Member Tags, Login with Telegram, Disable Sharing, GIF Editing, Date Formatting, Voting Timestamps

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Recent News

[H4] Guest AI Bots, Bot-to-Bot Chats, Chat Automation, Custom AI Styles, 100M+ Emoji & Sticker Search and Much More
Telegram adds over 10 new features, including ways for users to access AI services from any…
May 7, 2026

[H4] AI Editor, Mighty Polls, Live Photos, Bots Managed by Bots, and More
In today's update we introduce an AI Editor that can translate, transform, or fix your text in just two taps, new features for Polls like attaching…
Mar 31, 2026

[H3] Why Telegram?

[H3] Simple
Telegram is so simple you already know how to use it.

[H3] Private
Telegram messages are heavily encrypted and can self-destruct.

[H3] Synced
Telegram lets you access your chats from multiple devices.

[H3] Fast
Telegram delivers messages faster than any other application.

[H3] Powerful
Telegram has no limits on the size of your media and chats.

[H3] Open
Telegram has an open API and source code free for everyone.

[H3] Secure
Telegram keeps your messages safe from hacker attacks.

[H3] Social
Telegram groups can hold up to 200,000 members.

[H3] Expressive
Telegram lets you completely customize your messenger.

[H5] Telegram

Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.

[H5] About

FAQ
Privacy
Press

[H5] Mobile Apps

iPhone/iPad
Android
Mobile Web

[H5] Desktop Apps

PC/Mac/Linux
macOS
Web-browser

[H5] Platform

API
Translations
Instant View

[H5] About

[H5] Blog

[H5] Press

[H5] Safety

[H1] Telegram Applications

Telegram apps are open source and support reproducible builds. Anyone can independently verify that Telegram apps you download from App Store or Google Play were built using the exact same code that we publish.
[H4] Mobile apps
Telegram for Android
Telegram for iPhone and iPad
[H4] Desktop apps
Telegram for Windows/Mac/Linux
Telegram for macOS
[H4] Web apps
Telegram WebK
Telegram WebA
[H4] Telegram Database Library (TDLib)
TDLib – a cross-platform client designed to facilitate creating custom apps on the Telegram platform.
Telegram X for Android – a slick experimental Telegram client based on TDLib.
[H4] Unofficial apps
Unigram, a client optimized for Windows (based on TDLib)
Telegram CLI for Linux
MadelineProto
[H3] Source code
This code allows security researchers to fully evaluate our end-to-end encryption implementation. It is also possible to independently verify that Telegram apps available on Google Play and App Store are built using the same code that we publish on GitHub.
[H5] Telegram Database Library
Cross-platform library for building custom Telegram apps, see TDLib for details.Licensed under Boost 1.0.GitHub »
[H5] Telegram for Android
Official Android App, see Google Play Market page for full description.Licensed under GNU GPL v. 2 or later.GitHub »Download APK File »
[H5] Telegram for iOS
Licensed under GNU GPL v. 2 or later.GitHub »
[H5] Telegram for macOS
Native macOS client.Licensed under GNU GPL v. 2.GitHub »
[H5] Telegram for Web browsers
Telegram Web, Version K. Mac, Windows, Linux, Mobile.Licensed under GNU GPL v. 3.GitHub »
Telegram Web, Version A. Mac, Windows, Linux, Mobile.Licensed under GNU GPL v. 3.GitHub »
Legacy JavaScript client. Mac, Windows, Linux.Licensed under GNU GPL v. 3.GitHub »
[H5] Telegram React
JavaScript client for browsers. Mac, Windows, Linux.Licensed under GNU GPL v. 3.GitHub »
[H5] Telegram Desktop
Qt-based desktop client. Mac, Windows, Linux.Licensed under GNU GPL v. 3.GitHub »
[H5] Telegram for WP
Licensed under GNU GPL v. 2 or later.GitHub »
[H5] Telegram X for Android
Alternative Telegram client for Android based on TDLib.Licensed under GPL v.3.0GitHub »
[H4] Unofficial apps
[H5] Telegram CLI (Unofficial)
Linux Command-line interface for Telegram.Licensed under GNU GPL v. 2.GitHub »
[H5] Unigram (Unofficial)
A Telegram client optimized for Windows.Licensed under GNU GPL v. 3 or later.GitHub »
[H5] MadelineProto (Unofficial)
A PHP MTProto Telegram client.Licensed under GNU AGPL v. 3.GitHub »
[H3] Bug Bounty Program
Telegram welcomes developers and the security research community to audit its services, code and protocol seeking vulnerabilities or security-related issues. Learn more about our Bug Bounty Program here.

[H1] Telegram FAQ

This FAQ provides answers to basic questions about Telegram.Check out our Advanced FAQ for more technical information.
Telegram keeps evolving and adding new features, so this document may contain outdated information. We expect to finish updating the FAQ, Bot Manuals, and other documents within a few months.
General
What is Telegram?
Who is it for?
How is it different from WhatsApp?
How old is Telegram?
Is it available on my device?
Who are the people behind Telegram?
Where is Telegram based?
How do you make money?
What are your thoughts on internet privacy?
What about GDPR?
Do you process takedown requests?
Do you process data requests?
Telegram Basics
Who can I message?
Who can message me?
Does Telegram send Verification Codes for other apps?
Who has Telegram?
Inviting friends
What do the check marks mean in Telegram?
Can I hide my 'last seen'?
Who can see me 'online'?
Can I delete my messages?
Voice, Video and Group calls
Using emoticons
Groups and Channels
What makes Telegram groups cool?
How are channels and groups different?
Creating a group
Adding members and using Invite Links
Usernames and t.me
What are usernames? How do I get one?
What are Collectible Usernames? How are they different from basic usernames?
How does t.me work?
What can I use as my username?
Do I need a username?
Will people know my number?
How do I delete my username?
What do I do if my username is taken?
What if someone is pretending to be me?
Security
How secure is Telegram?
How do you encrypt data?
Why should I trust you?
Do I need to trust Telegram for it to be secure?
What if my hacker friend doubts you?
Can Telegram protect me against everything?
How does 2-Step Verification work?
What is Cocoon?
Do Telegram AI features upload data to third parties?
What AI models does Telegram use?
Secret Chats
What is a secret chat?
Starting a secret chat
Using the self-destruct timer
Screenshot alerts
Encryption key picture
Why not make all chats 'secret'?
Your Account
Who can see my phone number?
I have a new phone number, what do I do?
Log out of Telegram
Change your phone number
Delete your Telegram account
How does account self-destruction work?
My phone was stolen. What do I do?
What does Profile Rating mean?
What is a Passkey?
Bots
How do I create a bot?
How do I get rid of a bot?
Are bots safe?
What are mini apps?
Deeper Questions
Can I get Telegram's server-side code?
Can I use my own server?
Can I use the Telegram API?
Do you have a Privacy Policy?
What does the iOS privacy sheet mean?
Why do you have two apps in the Mac App Store?
Can I translate Telegram?
Can I help?
Troubleshooting
SMS, login, register
Getting a login code via a phone call
Getting codes via Telegram
Notification problems
Problems with contacts
Deleting contacts on Android
Secret Chats
Can't send messages to non contacts
Telegram uses the camera or microphone in the background
Contact Telegram SupportFollow Us on TwitterFacebookAdvanced FAQ
[H3] General Questions
[H4] Q: What is Telegram? What do I do here?
Telegram is a messaging app with a focus on speed and security, it’s super-fast, simple and free. You can use Telegram on all your devices at the same time — your messages sync seamlessly across any number of your phones, tablets or computers. Telegram is one of the top 5 most downloaded apps in the world with over 1 billion active users.
With Telegram, you can send messages, photos, videos and files of any type (doc, zip, mp3, etc), as well as create groups for up to 200,000 people or channels for broadcasting to unlimited audiences. You can write to your phone contacts and find people by their usernames. As a result, Telegram is like SMS and email combined — and can take care of all your personal or business messaging needs. We also support end-to-end encrypted voice and video calls, group calls for up to 200 participants, and voice chats in groups that members can join whenever they want.
Follow our Tips Channel to learn more about Telegram features.
[H4] Q: Who is Telegram for?
Telegram is for everyone who wants fast and reliable messaging and calls. Business users and small teams may like the large groups, usernames, desktop apps and powerful file sharing options.
Since Telegram groups can have up to 200,000 members, we support replies, mentions and hashtags that help maintain order and keep communication in large communities efficient. You can appoint admins with advanced tools to help these communities prosper in peace. Public groups can be joined by anyone and are powerful platforms for discussions and collecting feedback.
In case you're more into pictures, Telegram has animated gif search, a state of the art photo editor, and an open sticker platform (find some cool stickers here or here). What's more, there is no need to worry about disk space on your device. With Telegram's cloud support and cache management options, Telegram can take up nearly zero space on your phone.
Those looking for extra privacy should check out our advanced settings and rather revolutionary policy. And if you want secrecy, try our device-specific Secret Chats with self-destructing messages, photos, and videos — and lock your app with an additional passcode.
We keep evolving — check out our Brief History of Telegram and follow us on twitter and Telegram to stay in touch.
[H4] Q: How is Telegram different from WhatsApp?
Unlike WhatsApp, Telegram is a cloud-based messenger with seamless sync. As a result, you can access your messages from several devices at once, including tablets and computers, and share an unlimited number of photos, videos and files (doc, zip, mp3, etc.) of up to 2 GB each.
Telegram needs less than 100 MB on your device – you can keep all your media in the cloud without deleting things – simply clear your cache to free up space.
Thanks to Telegram's multi-data center infrastructure and encryption, it is faster and way more secure. On top of that, private messaging on Telegram is free and will stay free — no ads, no subscription fees, forever.
Telegram's API and code is open, and developers are welcome to create their own Telegram apps. We also have a Bot API, a platform for developers that allows anyone to easily build specialized tools for Telegram, integrate any services, and even accept payments from users around the world.
And that's just the tip of the iceberg.
Follow our Tips Channel to learn more about Telegram features.
[H4] Q: How old is Telegram?
Telegram for iOS was launched on August 14, 2013. The alpha version of Telegram for Android officially launched on October 20, 2013. More and more Telegram clients appear, built by independent developers using Telegram's open platform.
[H4] Q: Which devices can I use?
You can use Telegram on smartphones, tablets, and even computers. We have apps for iOS (13.0 and above), Android (5.0 and up), a native macOS app and a universal desktop app for Windows, macOS, and Linux. Telegram Web can also help to quickly do something on the go.
You can log in to Telegram from as many of your devices as you like — all at the same time. Just use your main mobile phone number to log in everywhere, your cloud chats will sync instantly.
The Telegram API is open for developers, should you want to build your own applications for other platforms.
[H4] Q: Who are the people behind Telegram?
Telegram is supported by Pavel Durov and his brother Nikolai. Pavel supports Telegram financially and ideologically while Nikolai's input is technological. To make Telegram possible, Nikolai developed a unique custom data protocol, which is open, secure and optimized for work with multiple data-centers. As a result, Telegram combines security, reliability and speed on any network.
See also: articles about Telegram
[H4] Q: Where is Telegram based?
The Telegram development team is based in Dubai.
Most of the developers behind Telegram originally come from St. Petersburg, the city famous for its unprecedented number of highly skilled engineers. The Telegram team had to leave Russia due to local IT regulations and has tried a number of locations as its base, including Berlin, London and Singapore. We’re currently happy with Dubai, although are ready to relocate again if local regulations change.
[H4] Q: Will you have ads in my private chats and groups? Or sell my data? Or steal my beloved and enslave my children?
No. See this post for details.
[H4] Q: How are you going to make money out of this?
We believe in fast and secure messaging that is also 100% free.
Our founder and CEO Pavel Durov, who financed Telegram throughout most of its history, has outlined a strategy to make Telegram sustainable in this post.
Following this plan, Telegram has implemented sustainable forms of monetization that prioritize its users:
In 2021, Telegram launched Sponsored Messages – minimalist, privacy-conscious advertisements that can appear in certain public channels.
In 2022, Telegram launched a Premium subscription which users can purchase to both support the app and unlock additional exclusive features.
These revenue streams help us pay for infrastructure costs and developer salaries, however making profits will never be an end-goal for Telegram.
Learn more about subscriptions in the Telegram Premium FAQ.
[H4] Q: What are your thoughts on internet privacy?
We think that the two most important components of Internet privacy should be:
Protecting your private conversations from snooping third parties, such as officials, employers, etc.
Protecting your personal data from third parties, such as marketers, advertisers, etc.
Telegram's aim is to create a truly free messenger, with a revolutionary privacy policy.
[H4] Q: What about GDPR?
The General Data Protection Regulation (GDPR) came into force in Europe on May 25, 2018. Since taking back our right to privacy was the reason we made Telegram, there wasn't much we had to change. We don’t use your data for ad targeting, we don’t sell it to others, and we're not part of any mafia family “family of companies.”
Telegram only keeps the information it needs to function as a feature-rich cloud service. For example, your cloud chats – so that you can access them from any devices without using third-party backups, or your contacts – so that you can rely on your existing social graph when messaging people on Telegram. Please see our Privacy Policy for more information.
You can use @EURegulation to:
Request a copy of all your data that Telegram stores.
Contact us about Data Privacy.
[H4] Q: There's illegal content on Telegram. How do I take it down?
All Telegram apps have 'Report' buttons that let you flag illegal content for our moderators — in just a few taps.
On Telegram for Android, tap the message and select Report from the menu. On iOS, press and hold the message. On Telegram Desktop, Web or Telegram for macOS, right-click the message and select Report. Then choose an appropriate reason.
You can also use our automated takedown email address abuse@telegram.org. If you're sending an email takedown request, please make sure to include links (like t.me/... or @...) to the content on Telegram which you think needs attention from our moderators.
Users from the EU are welcome to study the User Guidance for the EU Digital Services Act for the relevant reporting options.
Note: If a scammer is pretending to be you, contact @NoToScam
[H4] Q: How do I send a request under EU Regulation 2021/784?
The Regulation (EU) 2021/784 of the European Parliament and of the Council of 29 April 2021 on addressing the dissemination of terrorist content online (Terrorist Content Online Regulation, or TCO Regulation) allows authorities in EU countries to send removal requests for terrorist content, if it is discovered on Telegram's public platform. We have also designated a third party, European Digital Services Representative (EDSR), to assist us with TCO-related communications.
Users whose publications were taken down in connection with the TCO Regulation can request details on why their publications were considered terrorist and how to challenge the removal:
by writing to EDSR at Avenue Huart Hamoir 71, 1030 Brussels, Belgium, or
by contacting the @EURegulation bot on Telegram and using the command /tco_ask.
Requests can be accepted in English and French.
[H4] Q: A bot or channel is infringing on my copyright. What do I do?
Private groups and chats on Telegram are private amongst their participants. We do not process any requests related to them. However, Telegram also supports sticker sets, bots, channels and groups that are publicly available.
If you see a bot, channel, sticker set, or other content that is a part of Telegram’s public platform and is infringing on your copyright, kindly submit a complaint to dmca@telegram.org. Please note that such requests should only be submitted by the copyright owner or an agent authorized to act on the owner’s behalf.
[H4] Q: Do you process take-down requests from third parties?
Our mission is to provide a secure means of communication that works everywhere on the planet. To do this in the places where it is most needed (and to continue distributing Telegram through the App Store and Google Play), we have to process legitimate requests to take down illegal public content (e.g., sticker sets, bots, groups and channels) within the app. For example, we can take down sticker sets that violate intellectual property rights or porn bots.
Public content on Telegram, such as user-uploaded stickers sets, channels, and bots by third-party developers, is not part of the core Telegram UI. Whenever we receive a report regarding potentially illegal public content, we perform the necessary legal checks and take it down when deemed appropriate.
Please note that this does not apply to local restrictions on freedom of speech. For example, if criticizing the government is illegal in some country, Telegram won't be a part of such politically motivated censorship. This goes against our founders' principles. While we do block terrorist (e.g. ISIS-related) bots and channels, we will not block anybody who peacefully expresses alternative opinions.
[H4] Q: My bot or sticker set was banned unfairly, what do I do?
If you think we banned your bot, channel, or sticker set for no apparent reasons, drop us a line at abuse@telegram.org.
[H4] Q: Do you process data requests?
Secret chats use end-to-end encryption, thanks to which we don't have any data to disclose.
To protect the data that is not covered by end-to-end encryption, Telegram uses a distributed infrastructure. Cloud chat data is stored in multiple data centers around the globe that are controlled by different legal entities spread across different jurisdictions. The relevant decryption keys are split into parts and are never kept in the same place as the data they protect. As a result, several court orders from different jurisdictions are required to force us to give up any data.
Thanks to this structure, we can ensure that no single government or block of li

[H2] Telegram News

[H4] Guest AI Bots, Bot-to-Bot Chats, Chat Automation, Custom AI Styles, 100M+ Emoji & Sticker Search and Much More
Telegram adds over 10 new features, including ways for users to access AI services from any…
May 7, 2026

[H4] AI Editor, Mighty Polls, Live Photos, Bots Managed by Bots, and More
In today's update we introduce an AI Editor that can translate, transform, or fix your text in just two taps, new features for Polls like attaching…
Mar 31, 2026

[H4] Member Tags, Login with Telegram, Disable Sharing, GIF Editing, Date Formatting, Voting Timestamps
In today's update, we add tags to help group members show who they are, a setting to disable…
Mar 1, 2026

[H4] Android Redesign, Group Ownership Transfer, Gift Crafting, Colored Bot Buttons
This update adds the biggest interface update in the history of Telegram for Android, a crafting system to generate exclusive new gifts…
Feb 9, 2026

[H4] AI Summaries, New Design and More
Telegram's first update of 2026 brings even more Liquid Glass interfaces on iOS and AI summaries for channel posts and Instant View pages — built to maximize privacy and protect user…
Jan 3, 2026

[H4] Passkeys, Gift Purchase Offers and More
In today's update, we add secure passkeys for instant login without SMS codes, gift purchase offers with built-in scam protection, and a simple way to add audio from your profile to…
Dec 12, 2025

[H4] Live Stories, Repeated Messages, Auctions for Gifts and More
In today's update, you can start a stream with a live chat in your Telegram Story. We've also added repeating scheduled messages, an auction…
Nov 19, 2025

[H4] Comments in Group Calls, Notes for Contacts, Suggested Birthdays and More
In today's update we're launching live comments and reactions in group calls and video chats, notes for contacts, suggested birthdays,…
Oct 10, 2025

[H4] Music on Profiles, Stickers Mini App, New Profiles, and More
In today’s update, you can add music to your profile, choose a default profile tab, set unique chat themes based on your collectible gifts…
Aug 31, 2025

[H4] Public Post Search, Story Albums, Gift Collections and More
Today's update introduces global search for public posts on Telegram, sorting stories into albums and organizing gifts into collections…
Jul 31, 2025

[H4] Checklists, Suggested Posts and More Monetization Options for Channels
Today's update introduces checklists to help teams and individuals track tasks without leaving Telegram. We've also added suggested posts…
Jul 1, 2025

[H4] Direct Messages for Channels, Voice Trimming, Topic Tabs and HD Photos
In today's update, we add new ways for users to start conversations with their favorite channels, navigate topics more efficiently, trim…
Jun 3, 2025

[H4] Gift Marketplace, Posting Several Stories at Once, Auto-Translate For Channels
Introducing Telegram’s second major update in just 8 days! You can now safely buy or sell collectible gifts in the new marketplace. The…
May 8, 2025

[H4] Extra-Secure Group Calls, Automated Accounts, and More
Today’s update introduces extra-secure, easy-to-use group calls. We’re also rolling out a major upgrade that enables full automation for…
Apr 30, 2025

[H4] Star Messages, Pinned Gifts, Verification Platform 2.0, and More
Today’s update gives content creators and public figures more control over their privacy while offering new ways to monetize their popularity.…
Mar 7, 2025

[H4] AI-Powered Sticker Search, Improved Videos and More
Today's update lets you search millions of stickers with AI, copy video links at the current time, set cover photos for videos, react with…
Feb 12, 2025

[H4] Wear Collectible Gifts, Move Gifts to the Blockchain, Send Gifts to Channels, and More
Today's update adds 6 new features to Telegram, including the ability to wear collectible…
Jan 24, 2025

[H4] Collectible Gifts, Message Search Filters and More
Today we're releasing the first update of 2025, which includes collectible gifts that can be transferred or re-sent to other users, the…
Jan 1, 2025

[H4] Affiliate Programs, AI-Powered Sticker Search, Collages, and More
Today, we’re bringing exciting news for content creators and mini app developers on Telegram. Creators now have a simple way to monetize…
Dec 4, 2024

[H4] Mini Apps 2.0: Full-Screen Mode, Home Screen Icons, Geolocation and 10 more features
Today we launch the largest update in the history of mini apps. They get a full-screen mode…
Nov 17, 2024

[H5] Telegram

Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.

[H5] About

FAQ
Privacy
Press

[H5] Mobile Apps

iPhone/iPad
Android
Mobile Web

[H5] Desktop Apps

PC/Mac/Linux
macOS
Web-browser

[H5] Platform

API
Translations
Instant View

[H5] About

[H5] Blog

[H5] Press

[H5] Safety