OpenAssistant 提倡使用 Discord 或 Google 登錄：https://open-assistant.io/auth/signin

in contrast to ChatGPT, Open Assistant is open-source and they state on the website: “Yes, Open Assistant will be free to use and modify.” When there’s no business model behind this service that someone is profiting from and it is available for everyone without any restrictions, then this service is trade-free.