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For a group already using Telegram, the clearest documented option is Telegram guest mode: a participant can call a supported bot into a non-secret group or supergroup, and the bot can answer there without joining as a member. This can avoid requiring each person to create a separate account with the AI provider or bot operator—but it does not eliminate the need for a Telegram account. If you mean no account on any messaging platform, the options covered here do not establish a persistent group-chat solution that meets that requirement.
What “without making everyone create an account” can mean
There are two different account requirements:
- No separate AI-service account: people use the messaging platform they already have, while a bot or agent handles the AI interaction.
- No account on the messaging platform: people join the conversation without signing in to Telegram, Teams, or another chat service.
Telegram guest mode addresses the first meaning for supported bots. The official documentation does not establish that people can participate in a persistent Telegram group without Telegram accounts. Teams has an anonymous meeting option, but that is temporary meeting chat rather than a full group-chat alternative.
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How to add an AI bot to a Telegram group as a guest
Telegram’s guest-mode documentation says supported bots can be queried by username in non-secret private chats, groups, and supergroups. The bot can post its result in the chat without being a member. Telegram records guest mode as a Bot API 10.0 feature introduced on May 8, 2026, in its Bot API release history.
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bot_guestchatflag enabled; this is a capability the bot operator must provide. - Use a supported chat. The documented locations are non-secret private chats, groups, and supergroups. Content-protected groups and supergroups are excluded.
- Invoke the bot by username. A participant calls it into the conversation with a query. Telegram sends the bot a guest-query update containing the triggering message and, where applicable, reference messages.
- Review the answer in the chat. The bot returns a result that Telegram posts to the conversation, although it has not joined as a group member.
In practical terms, the bot can answer when someone calls it into the conversation; this documentation does not say it silently reads every message. If the group needs continuous monitoring or an assistant that responds to unprompted messages, verify that behavior with the bot operator before relying on it. Telegram also documents commands, inline interactions, AI chatbot features, and web apps, but those capabilities alone do not establish that a particular third-party bot is available, safe, free, or suitable.
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What happens in Microsoft Teams
Teams has distinct rules for persistent group chats and anonymous meetings. Neither should be mistaken for a general way to let anyone join an AI-enabled group chat without an account.
Persistent group chat: an account is prompted
Microsoft says that inviting someone without a Teams account to a group chat sends them an invitation to create an unmanaged Teams account. External access can also be limited or blocked by either organization’s policies. That means a Teams group-chat invitation does not meet a strict no-Teams-account requirement as documented. See Microsoft’s guidance on adding or inviting people outside an organization to a Teams chat.
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Anonymous meeting: limited, temporary chat
People may join a Teams meeting anonymously by link when the relevant settings allow it, but meeting-chat access is temporary and anonymous attendees cannot see chat history. Microsoft also says anonymous meeting users cannot directly use apps. An installed app may send an Adaptive Card that anonymous attendees can interact with, but that is not the same as freely invoking a group-chat agent. Details are in Microsoft’s Teams meeting-chat guidance and app access guidance for external users.
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Signed-in external users can interact with installed bots in Teams group chats, subject to the host organization’s app and data policies. Guests cannot add apps to the shared chat themselves, though they can use apps an organization user has added. This can work for a group whose participants have Teams access, but it does not remove the account or administrator-policy requirements.
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How much of the conversation does the agent receive?
Access depends on the platform and the agent’s configuration. Telegram’s guest flow is participant-triggered and passes the query message plus possible referenced messages. That is the message content the bot processes; the guest-mode documentation does not establish access to every group message.
For Teams, Microsoft says: “By default, agents in group chats and channels only receive messages when they’re directly @mentioned.” A separate resource-specific-consent configuration can allow an agent to receive all messages in a group chat or channel where it is installed. Mention-only access is narrower; enabling access to all messages gives the agent more of the conversation. See Microsoft’s channel and group chat conversation guidance.
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Which option fits your group?
| Option | Account requirement | Conversation type | How the agent is used | Important condition |
|---|---|---|---|---|
| Telegram guest bot | Does not require a separate AI-provider account for each participant based on the documented guest flow; participants still need Telegram. | Persistent, non-secret private chat, group, or supergroup. | A participant invokes the bot; it receives the query and possible reference messages. | The bot must have guest-chat support enabled. Content-protected groups and supergroups are excluded. |
| Teams group chat | People without a Teams account are prompted to create an unmanaged account. | Persistent group chat. | Signed-in external users can use installed bots, subject to organization policies. | A host organization user must add the app; external access and app/data policies may restrict use. |
| Anonymous Teams meeting | May allow joining without a Teams account when meeting settings permit. | Meeting chat with temporary access; chat history is unavailable to anonymous users. | Anonymous users cannot directly use apps; they may interact with an installed app’s Adaptive Card. | This is not equivalent to an anonymous participant freely invoking a group-chat agent. |
For a group that already uses Telegram and only needs people to ask an AI bot questions, Telegram guest mode is the most direct documented fit. For a strict requirement that participants have no account on the messaging platform, neither Telegram guest mode nor Teams group chat satisfies it as documented; anonymous Teams meetings provide a narrower, temporary alternative rather than persistent group chat.
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