Plan before you add more accounts
Running several Telegram accounts is common: a personal profile, a work profile and perhaps one for a business or community you manage. Trouble starts when the accounts blur together, a message goes out from the wrong one, or a security setting is forgotten on the account you rarely open. A little planning prevents most of that.
Give every account a clear job and note it down if you handle more than two: which number it uses, what it is for, who else relies on it, and where its recovery email and two-step verification password are stored. Use a distinct name and profile photo for each account so you can tell them apart at a glance.
Keep the number of accounts to what you genuinely need. Each extra account is another set of sessions, passwords and notifications to look after, and accounts created only to multiply your presence in groups or send mass messages go against Telegram's terms of service.
Switching accounts on your phone
The official Telegram apps let you stay signed in to several accounts at once. On Android, your accounts appear in the side menu under your name, and one tap switches between them. On iPhone, press and hold the Settings tab to see the list, or open Settings and choose the account there. The app keeps each account's chats, drafts and settings separate.
Notifications from all signed-in accounts can arrive together, and tapping one opens the chat in the correct account. If that becomes confusing, the notification settings include an option to show alerts only for the account you are currently using. Groups and channels can be muted in each account independently.
Before sending anything sensitive, glance at the name or avatar at the top of the screen. It is a small habit that prevents most wrong-account mistakes.
Desktop and browser use
Telegram Desktop handles multiple accounts in much the same way: add them from the side menu or settings and switch with a click. If you spend the working day at a computer, keeping the work account mainly on desktop and the personal one mainly on your phone is an easy way to put some distance between them.
In a web browser, the tidiest approach is a separate browser profile for each account, so sessions, saved logins and downloads do not mix. Every desktop or web login creates a new session, which you can see in the Devices section of that account.
Regular chats and media live in Telegram's cloud, so what you see on your phone is also available on your computer. Secret chats are the exception: they exist only on the device where they were started, so do not expect them to follow you to another app.
Using folders to stay organised
Chat folders are the most useful tool for anyone with busy accounts. Each account has its own set of folders, so you might create Clients, Team, Channels and Personal in one account and a simpler set in another. Folders can include whole chat types, such as all groups or all channels, and exclude chats that are muted, read or archived.
Shareable folders go a step further. You can create an invite link for a folder, and anyone who opens it can join its groups and channels in one go, which is handy when a new team member needs access to a set of project chats. Only groups and channels can be shared this way, never your private conversations.
Use the archive for chats you want out of sight without deleting them, and pin the few conversations that matter most to the top of each folder.
Security for every account
Security settings belong to each account individually, so a strong setup on your main profile does nothing for the others. For every account, enable two-step verification with a unique password, add a recovery email and review active sessions regularly. Telegram can also end sessions automatically after they have been inactive for a period you choose.
A local passcode protects the app on a particular device. It matters most on a laptop or a phone that other people sometimes use, because once the app is open, every account inside it is only a tap away.
Check the account self-destruct setting as well. An account that has not been opened for the chosen period can be deleted along with its chats and contacts, so for accounts you rarely use, pick a longer period and sign in now and then.
If one of the accounts came from a marketplace such as rStock, secure it before doing anything else: change the two-step verification password, update the recovery email and end every session you do not recognise. Follow Telegram's terms of use for every account you run, purchased ones included. rStock is not affiliated with Telegram, and the Telegram name belongs to its owner.
Working as a team without sharing logins
When several people need to look after the same audience, resist the urge to pass one account's login around. Shared login codes are a common way for accounts to get lost, and it becomes impossible to tell who wrote what. Telegram already has tools that let each person work from their own account.
For channels and groups, add team members as admins and give each person only the rights they need, such as posting, editing or managing members. In channels, signed messages show which admin wrote a post. For customer conversations, a group or a bot can pass requests to several people, and a business account can connect a chatbot for routine questions.
When someone leaves the team, remove their admin rights and end any sessions they had on shared devices the same day. A short list of who has access to what makes this quick.
Tools to avoid
Plenty of third-party programs promise to run dozens or hundreds of Telegram accounts at once, usually with automated messaging, mass inviting or auto-joining. These tools are built for spam, go against Telegram's terms of service and often end with accounts being limited or deleted. Some also ask you to upload session files, which hands full control of your accounts to whoever runs the tool.
Stick to the official apps, which already handle several accounts well, and keep them updated. If a task seems to call for automation, a bot you control that works within Telegram's rules is almost always the better answer.