01
What it is
Telegram OSINT is the structured collection and analysis of intelligence from publicly accessible Telegram channels, groups, and user profiles using open-source methods, without accessing private communications or authenticating as someone other than yourself.
Telegram is a cloud-based messaging platform with over 1 billion users that operates a hybrid model: private encrypted chats sit alongside fully public broadcast channels and open groups, all accessible without an account. For investigators, the public layer is the primary target. Channels broadcast to unlimited subscribers and retain full message history. Public groups allow open membership and searchable content. Both are indexed, in part, by third-party tools and search engines.
Telegram OSINT differs from most social media investigation in three respects. First, Telegram does not use a central content index, so no single search surface covers everything. Second, the platform assigns each account a permanent numeric Telegram ID: a fixed integer generated at account creation that does not change when a username, display name, or phone number does. That ID persists across renames, account transfers, and channel rebranding, making it the only reliable anchor for any durable attribution chain. Usernames are mutable; the Telegram ID is not. Third, Telegram does not strip metadata from non-image file types. PDFs, Word documents, spreadsheets, and video files posted to channels retain their creation timestamps, author fields, and software version data. In investigations where a channel is distributing documents, that metadata is often more useful than anything visible on screen.
When to use this guide
- Investigating a public Telegram channel or group linked to a subject, network, or incident
- Attributing a Telegram username or account to a real-world identity
- Mapping the network of channels a subject operates or forwards content between
- Archiving time-sensitive content from a channel before it is deleted or made private
02
How to run a Telegram OSINT investigation
A structured workflow for locating channels, extracting metadata, archiving content, and pivoting to linked accounts and networks.
The following tools are used across the steps below. All are free to access for basic use unless noted.
TGStat: Channel analytics and search platform indexing over 2.7 million public Telegram channels. Free tier provides subscriber counts, post history, citation index, and cross-channel mention tracking. Login required for advanced analytics. Free with registration.
Telegago: Google Custom Search Engine built by Bellingcat targeting t.me and telegram.me domains. Returns indexed public content without requiring a Telegram account. Free.
Telepathy: Open-source command-line toolkit for archiving Telegram chat history, extracting member lists (up to 5,000 members), mapping forwarded message networks, and retrieving account metadata. Developed by Jordan Wildon, now maintained under Prose Intelligence Ltd. Requires a Telegram API key from my.telegram.org and a personal account. Free. Technical setup required.
Wayback Machine: Internet Archive's web capture service. Used to check whether a Telegram channel page has been previously archived and to submit new captures before content is deleted. Accepts t.me URLs directly. Free.
WhatsMyName: Cross-platform username search tool that checks a given handle against hundreds of platforms simultaneously. Used in Step 04 to pivot from a Telegram username to linked accounts elsewhere. Free.
ExifTool: Command-line metadata extraction tool for reading embedded data from PDF, DOCX, XLSX, MP4, MOV, and other non-image file types. Used in Step 06 to extract authorship and timestamp metadata from documents posted to Telegram channels. Free, open source.
Before you begin
Stop at the login
Most steps in this guide require no Telegram account. TGStat and Telegago work without authentication. Telepathy and Telegram Web require a personal account only when accessing content your research account has been added to. Do not create accounts under false identities or join private groups under pretences of membership you do not hold.
Legal considerations
Collecting data from public Telegram channels is lawful in most jurisdictions, but processing personal data from member lists engages GDPR and equivalent frameworks. Minimise your data footprint: collect only what is necessary for your specific investigative purpose, and do not retain member list data beyond the active investigation period. Joining private groups under false pretences may constitute unauthorised access under applicable computer misuse law.
