In addition to authorization (Telegram Login) and payments (Telegram Payments), there are several powerful, deeply integrated features in the messenger ecosystem. They turn a regular chat into a full-fledged application or an automated system.
Here are the most interesting and technologically advanced of them:
Deep Linking
Allows stitching into the bot link. (t.me/your_bot?start=xxx) hidden parameters.
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How does it work?The customer scans the QR code on the table in the cafe or clicks on the blogger's ad, launches the bot, and the botimmediately knows, where the user came from, what table he took or what kind of promotion he needs to show, without any questions.
Sharing data without copying (Inline Mode / Make a choice for me)
The user can call your bot inany other chat(with a friend, colleague, or in a group) by simply entering the bot's nickname via@such as@hotel_bot).
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How does it work?The bot directly in the input field offers cards of goods, services or reservations. The user clicks on one of them, and a beautiful interactive card is sent to a friend. A great tool for mechanics "Recommend us to a friend" or "Let's choose together".
Telegram Passport (Single Document Repository)
Function for services that require real verification (carsharing, real estate rental, financial services, legal advice).
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How does it work?The user once uploads their documents (passport, rights, utility bills) to the encrypted Telegram cloud. When your bot needs verification, the client allows access in two clicks, and the bot instantly receives verified data. You don't need to write a complex photo document recognition system.
Automatically send live location
Ideal for delivery services, on-site craftsmen or quests.
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How does it work?The bot can request the user to broadcast the geolocation in real time. For example, if a courier delivers an order, the bot sees the customer's movement and can send a notification:"I see you are already close to the point, the master will be free in 5 minutes".
Secure short sessions (Telegram Web Login for Mini Apps)
When a user opens the Web App inside the bot, they do not need to enter their username and password. The bot automatically sends the hashed string with user data (ID, name, username) to the application.
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Why it's cool:The application is 100% sure who is in front of it, the data is protected from forgery on the server side (through verification with a secret bot token), and for the user it looks like magic — he opened the tab, and he is already authorized in his personal account.
Sound Games & Custom Notification Sounds
A relatively recent feature that allows bots (and channels) to set unique sounds for their notifications. You can upload your branded short audio file, and when the bot sends a critical notification to the customer (for example, “Your master has arrived”), it will sound with a unique sound signal of your brand, standing out among hundreds of other chats.