Aiogram Hosting Guide for Telegram Bots

Keep an async Telegram bot online without duplicate pollers or hidden startup errors.

Aiogram is an asynchronous Telegram bot framework. Hosting it is straightforward when the process starts a polling loop and stays alive, but async code makes some deployment mistakes easy to miss. The host must run the Python entry file as a long-lived process, not as a one-time script.

Keep the startup path explicit

Define one clear main function, create the Bot and Dispatcher, and start polling only when the file is executed directly. Read the token from an environment variable. Your requirements.txt should specify an aiogram version that matches the API used in your code; major versions have different handler patterns.

Avoid duplicate polling

Stop the local bot before starting the hosted copy. If two processes use the same token for long polling, update delivery may fail or appear intermittent. A deployment system that starts a second container before terminating the first can also overlap briefly; watch the logs during a rollout.

Handle async work carefully

Use async libraries for network operations inside handlers. A blocking requests call or time.sleep can stall the event loop and make the bot slow for everyone. For longer jobs, queue work or create a background task with clear error handling. Set timeouts when calling external services and log failures without exposing user messages or secrets.

Verify in production

After upload, confirm dependencies install and polling starts. Send a real command, test an error path, then restart the process and send the command again. If handlers do not fire, check router registration, filters, bot permissions and Telegram update types before blaming hosting.