# AI tools for knowledge workers with an API in 2026

> 20 AI tools for knowledge workers on Finder Atlas offer an API. In 2026 the top of the list is Claude, Speechify and Google Gemini, ranked by reviews from people who use them.

- This page: https://finderatlas.com/best/professionals/with-api
- Ranking: reviews on Finder Atlas first, then claimed listings, then editor-reviewed listings, then the editorial score. No paid placement.

## Tools

- [Claude](https://finderatlas.com/tools/claude): Anthropic's AI assistant for writing, analysis, coding and working with files (Freemium · Free plan, paid from $20/month · API · Web, macOS, Windows · 4.5/5 from 2 reviews)
- [Speechify](https://finderatlas.com/tools/speechify): Listen to documents and web pages with natural AI voices, and dictate by voice (Freemium · Free plan, paid from $29/month · API · Web, iOS, Android)
- [Google Gemini](https://finderatlas.com/tools/gemini): Google's AI assistant for chat, research, image and video creation, and Workspace apps (Freemium · Free plan, paid from $4.99/month · API · Web, iOS, Android)
- [Perplexity](https://finderatlas.com/tools/perplexity): AI answer engine that searches the live web and cites its sources (Freemium · Free plan, paid from $20/month · API · Web, iOS, Android)
- [Gemini Notebook](https://finderatlas.com/tools/notebooklm): Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources (Freemium · Free plan, paid from $4.99/month · API · Web, iOS, Android)
- [Gamma](https://finderatlas.com/tools/gamma): Generate presentations, documents and websites from a prompt with an AI design partner (Freemium · Free plan, paid from $12/month · API · Web, API)
- [Mistral Vibe (formerly Le Chat)](https://finderatlas.com/tools/mistral-le-chat): Mistral AI's chat assistant and coding agent for everyday work and software tasks (Freemium · Free plan, paid from $14.99/month · API · Web, iOS, Android)
- [Otter.ai](https://finderatlas.com/tools/otter-ai): Record, transcribe and summarize meetings, with action items and searchable AI chat (Freemium · Free plan, paid from $16.99/user/mo · API · Web, macOS, Windows)
- [n8n](https://finderatlas.com/tools/n8n): Build and self-host workflow automations and AI agents with visual nodes and custom code (Freemium · Free plan, paid from €24/month · API · Web, API)
- [Zapier](https://finderatlas.com/tools/zapier): Connect AI models and 9,000+ business apps into automated workflows and agents (Freemium · Free plan, paid from $29.99/month · API · Web, API, CLI)
- [Grammarly](https://finderatlas.com/tools/grammarly): AI writing assistant that corrects, rewrites and tone-checks your text across every app (Freemium · Free plan, paid from $30/month · API · Web, macOS, Windows)
- [You.com](https://finderatlas.com/tools/you-com): Real-time web search, research and answer APIs that ground AI agents in live data (Freemium · Free plan, paid from $5/1K calls · API · Web, iOS, Android)
- [Circleback](https://finderatlas.com/tools/circleback): AI meeting notes, action items and automations that work with or without a bot (Freemium · Free plan, paid from $18/user/mo · API · Web, macOS, Windows)
- [Kagi](https://finderatlas.com/tools/kagi): Ad-free, subscription-funded search engine with built-in AI assistant and summarization tools (Free trial · Free plan, paid from $5/month · API · Web, iOS, Android)
- [VEED](https://finderatlas.com/tools/veed): Browser-based AI video editor for subtitles, avatars, dubbing and social-ready videos (Freemium · Free plan, paid from $19/month · API · Web, iOS, API)
- [Gumloop](https://finderatlas.com/tools/gumloop): Build AI agents that work across your company's apps, with IT in control (Free trial · From $37/month · API · Web, Chrome Extension, CLI)
- [Manus](https://finderatlas.com/tools/manus): General AI agent that plans, researches, codes and delivers finished work autonomously (Freemium · Free plan, paid from $20/month · API · Web, macOS, Windows)
- [Motion](https://finderatlas.com/tools/motion): AI work platform that plans your day, manages projects and automates tasks (Free trial · From $19/seat/mo · API · Web, macOS, Windows)
- [Kimi](https://finderatlas.com/tools/kimi): Chat, research and agent assistant from Moonshot AI, built on its Kimi K3 model (Freemium · Free plan, paid from $19/month · API · Web, macOS, iOS)
- [Felo](https://finderatlas.com/tools/felo): Multilingual AI search engine that also builds slides, mind maps and research reports (Freemium · Free plan, paid from $14.99/month · API · Web, iOS, Android)

## Related lists

- All 40 tools for knowledge workers: https://finderatlas.com/best/professionals.md
- Free tools for knowledge workers (32): https://finderatlas.com/best/professionals/free.md
- Tools with an API for knowledge workers (20): https://finderatlas.com/best/professionals/with-api.md
- AI Assistants (11): https://finderatlas.com/categories/ai-assistants.md
- Productivity (4): https://finderatlas.com/categories/productivity.md
- Audio & Speech AI (2): https://finderatlas.com/categories/audio-ai.md
- Developer Tools (1): https://finderatlas.com/categories/developer-tools.md
- Education & Research (1): https://finderatlas.com/categories/education.md
- Video AI (1): https://finderatlas.com/categories/video-ai.md

## FAQ

**What is the best AI tool for knowledge workers?**

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 knowledge workers are free?**

Claude, Speechify, Google Gemini, Perplexity and Gemini Notebook have a free plan, among 32 in total.

**Which AI tools for knowledge workers have an API?**

Claude, Speechify, Google Gemini, Perplexity and Gemini Notebook offer an API, among 20 in total.

**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.