Telegram

Telegram
Mikepascoe · CC BY-SA 4.0 · source
Name	Telegram Messenger
Developer	Pavel Durov; Nikolai Durov
Released	2013
Programming language	C++; Java; Swift; Kotlin; Objective-C
Operating system	Android; iOS; Windows; macOS; Linux; web
License	Proprietary server, client-open-source

Telegram

Telegram is a cloud-based instant messaging service created in 2013 by Pavel Durov and Nikolai Durov. It provides text messaging, voice and video calls, file sharing, groups, channels, and bots across mobile, desktop, and web clients. The service emphasizes speed, cross-platform sync, and a mix of cloud and optional end-to-end encrypted communications.

History

The project was founded by Pavel Durov after his departure from VKontakte and drew early investment and attention from figures linked to Digital Fortress-era encryption debates, with architecture influenced by work from the Durov brothers and precedents such as ICQ, AIM, Skype, and WhatsApp. Early rollouts targeted markets including Russia, Iran, Ukraine, and Brazil, rapidly expanding during events like the 2014 Ukrainian crisis and the 2016 United States presidential election cycle when user growth spiked. Over the years the platform evolved features paralleling innovations from LINE (software), WeChat, and Signal (software), while encountering regulatory scrutiny from authorities in Germany, India, Russia, and Argentina regarding content moderation, encryption, and compliance. High-profile outages and spikes in registrations followed policy changes at Twitter, Facebook, and WhatsApp, prompting comparative analyses by technology journalists from outlets such as The Verge, Wired, The Guardian (London), and The New York Times.

Features

Clients implement cloud chats, secret chats, voice calls, video calls, group chats with large membership akin to Discord (software), and broadcast channels similar to YouTube channels and RSS feeds. The platform supports file transfers with high size limits, stickers and animated emojis comparable to offerings from LINE (software) and WeChat, and an extensive bot API used by developers building services analogous to integrations seen on Slack and Facebook Messenger. Additional features include message editing, scheduled and silent messages, polls and quizzes inspired by SurveyMonkey functionality, and a payments API comparable to merchant tools from Stripe and PayPal. Cross-platform synchronization echoes design choices from Dropbox and Google Drive for persistent cloud storage of non-secret conversations.

Security and privacy

The service uses a proprietary server architecture with client source code released for scrutiny, balancing openness like projects such as OpenVPN with closed-source server components similar to Apple (company)'s approach. End-to-end encryption is provided only in optional secret chats modeled after protocols discussed in research from IEEE and comparisons to Signal Protocol implementations used by WhatsApp. Metadata handling and retention policies have been critiqued by privacy advocates associated with Electronic Frontier Foundation and researchers from University of Cambridge and Massachusetts Institute of Technology. The platform has engaged in cryptographic competitions and academic discussions with contributors from Stanford University and Princeton University about protocol security and formal verification. Governments such as those of Russia and Iran have demanded access leading to legal confrontations and debates echoed in rulings from courts including those in European Court of Human Rights-adjacent jurisdictions.

Platforms and availability

Official clients are available for Android (operating system), iOS, Windows (Microsoft), macOS, and various Linux distributions, alongside browser-based web clients comparable to offerings by Gmail web apps and Facebook Messenger web. The service is accessible in many countries but has faced temporary bans or restrictions in jurisdictions including Iran, China, Russia, and Pakistan, often alongside broader disputes involving national telecom regulators such as agencies in India and Turkey. Third-party clients and forks have appeared, inspired by open-source projects like Telegram FOSS and communities akin to those surrounding Signal (software) and Matrix (protocol).

Business model and monetization

Initial funding originated from the Durov brothers' private resources and support tied to ventures in VKontakte and other Russian tech ventures. Revenue experiments have included premium features, sponsored messages within public channels, and a creator-focused ecosystem echoing monetization strategies used by YouTube and Patreon. The platform has explored paid subscriptions for advanced tools similar to offerings from Dropbox and Slack, while also maintaining free core services in a model compared to freemium strategies used by Spotify and LinkedIn.

Reception and controversies

The service has been praised by technologists and publishers such as TechCrunch and Wired for speed and feature set, while criticized by civil liberties groups like Amnesty International and Human Rights Watch over moderation practices and misuse by extremist networks referenced in analyses by RAND Corporation and Brookings Institution. Content moderation disputes have drawn comparisons to challenges faced by Facebook, Twitter, and YouTube during elections and conflict coverage, leading to public debate in media outlets including BBC News, CNN, and Reuters. Legal battles over encryption and data access involved courts and regulators in Russia, Germany, and India, and raised questions for policymakers in European Union institutions and national legislatures.

Category:Instant messaging