AI tools for writers with an API in 2026
5 AI tools for writers on Finder Atlas offer an API. In 2026 the top of the list is Claude, Perplexity and Otter.ai, ranked by reviews from people who use them.
Drafting, editing and research for articles, books, scripts and copy.
Across AI Assistants (3), Audio & Speech AI (1) and Productivity (1).
The list
- 1
Anthropic's AI assistant for writing, analysis, coding and working with files
Free plan, paid from $20/month · Web, macOS, Windows · API · Mobile app
- 2
Perplexity
FreemiumAI answer engine that searches the live web and cites its sources
Free plan, paid from $20/month · Web, iOS, Android · API · Mobile app
- 3
Otter.ai
FreemiumRecord, transcribe and summarize meetings, with action items and searchable AI chat
Free plan, paid from $16.99/user/mo · Web, macOS, Windows · API · Mobile app
- 4
Trust Me Bro
FreemiumPaste a claim, get cited research for and against it and a shareable receipt
Free plan, paid from $9.99/month · Web, Chrome Extension, API · API
- 5
Grammarly
FreemiumAI writing assistant that corrects, rewrites and tone-checks your text across every app
Free plan, paid from $30/month · Web, macOS, Windows · API · Mobile app
Frequently asked questions
What is the best AI tool for writers?
Claude tops this list. Anthropic's AI assistant for writing, analysis, coding and working with files. It is freemium (free plan, paid from $20/month).
Which AI tools for writers are free?
Claude, Perplexity, Otter.ai, Trust Me Bro and Grammarly have a free plan, among 15 in total.
Which AI tools for writers have an API?
Claude, Perplexity, Otter.ai, Trust Me Bro and Grammarly offer an API.
How is this list ranked?
Tools with reviews on Finder Atlas come first, by rating. Then listings claimed by their makers, then listings checked by our editors, then Finder Atlas's own 0 to 10 editorial score. Nothing on the list is paid placement.
Not your role? See every list, or browse all categories.