# Invitation codes

Definest.ai is a closed service; you cannot register without an invitation. Invitations can be obtained from people who already have an account on the Definest website.

Invitations are also sometimes issued:

* In our [Telegram channel](https://t.me/definest_ai)
* In our [Telegram group](https://t.me/+zUj_adwqWK9hOTg0)