Google Gemini

Chatbots and Assistants - Pricing: freemium - Editor rating: 4.0/5 - https://gemini.google.com

Google's AI assistant, tightly integrated with Search, Gmail, Docs, and Android.

Gemini is Google's flagship assistant, and its superpower is integration: it can reason over your Gmail, Docs, and Drive, answer with fresh information from Search, and comes built into Android phones and Workspace. For anyone already living in the Google ecosystem it is the lowest-friction option, and its free tier is strong.