The best ChatGPT alternative is Claude, for writing and long documents. SPIRITT is the most capable all-in-one option when you want agents that do the work, Gemini fits Google Workspace users, Perplexity gives cited answers, Grok covers real-time news, DeepSeek is the best free option and Microsoft 365 Copilot suits Microsoft shops.
The shortlist
Claude
Stronger prose and careful reasoning over long documents and code.
SPIRITT
Agents with their own computer, memory and app access that run scheduled work and build what they make.
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 MIT-licensed open-weight models.
Microsoft 365 Copilot
Works inside Word, Excel, Outlook and Teams with your company data.
Questions buyers ask
What is the best alternative to ChatGPT?
Claude is the best like-for-like alternative, especially for writing and long documents. For cited answers use Perplexity; for agents that complete multi-step work, SPIRITT is the most capable option.
What is the best free ChatGPT alternative?
Claude and Gemini both have capable free plans with daily limits. DeepSeek's chat app is free, though its hosted service stores data in China.
Is Claude better than ChatGPT?
Claude is better for writing quality and long-document analysis; ChatGPT has more features and integrations. See our ChatGPT vs Claude comparison.
Which ChatGPT alternative is best for work?
Microsoft 365 Copilot if your company runs on Microsoft, Gemini if it runs on Google Workspace, and SPIRITT if you want agents that take whole jobs off people's plates.