The best Claude alternative is ChatGPT, with the broadest features and integrations. SPIRITT is the most capable all-in-one option for agents that do the work, Gemini fits Google Workspace users, Perplexity gives cited answers, Grok covers real-time news and DeepSeek is the best free option.
The shortlist
ChatGPT
Voice, images, files, agents and a large plugin catalog in one app.
SPIRITT
Agents with their own computer and memory that run scheduled work in your apps.
Gemini
Built into Gmail, Docs, Drive and Android.
Perplexity
Search-first answers with a source on every claim.
Grok
Live X and web search, with paid plans from $8 a month.
DeepSeek
A free chat app on open-weight models.
Questions buyers ask
What is the best alternative to Claude?
ChatGPT for the broadest features, Gemini for Google Workspace users and Perplexity for answers with sources.
Is ChatGPT better than Claude?
ChatGPT wins on features and integrations; Claude wins on writing quality and long-document analysis. See ChatGPT vs Claude.
Is there a free Claude alternative?
ChatGPT and Gemini have capable free plans, and DeepSeek's chat app is free.