Most likely no but it will depend on how many users will use your bot at once. From sly: There is no limit other than the API rate limit subjected by your subscription. Pay as you go have a limit of 100 API calls per second while Teams plan have a limit of 1000 API calls per second. A safe assumption is to count ~10 API calls for processing one message. That means a bot on the pay as you go workspace would be able to handle ~10 messages per second.