# AI Tool Index

> An independent directory of 621 AI tools in 27 categories. Each entry has the tool's official URL, a one-line factual description and, where we could confirm it, its pricing model. Pricing is as shown on each vendor's pricing page when last checked (2026-10-31); verify on the vendor's site before relying on it.



## Data
- [Full directory (JSON)](https://aitoolindex.org/api/tools.json): all tools and categories
- [Full directory as plain text](https://aitoolindex.org/llms-full.txt): every tool with URL, pricing and description
- [Sample (JSON)](https://aitoolindex.org/api/sample.json): 10 tools, same schema
- [Categories (JSON)](https://aitoolindex.org/api/categories.json)
- [OpenAPI description](https://aitoolindex.org/api/openapi.json)
- [For agents](https://aitoolindex.org/for-agents/): usage notes and planned paid data feeds

## Guides
- [Best AI tools by category and use](https://aitoolindex.org/best/): 36 unranked guides
- [Alternatives to popular tools](https://aitoolindex.org/alternatives/): 26 guides
- [Comparisons](https://aitoolindex.org/compare/): 17 fact tables
- [AI glossary](https://aitoolindex.org/glossary/): 55 terms
- [What's new](https://aitoolindex.org/whats-new/)

## Categories
- [Chatbots & Assistants](https://aitoolindex.org/category/chatbots/): General-purpose AI assistants you can chat with.
- [Writing](https://aitoolindex.org/category/writing/): AI tools for copywriting, editing, grammar and long-form content.
- [Image Generation](https://aitoolindex.org/category/image/): Generate, edit, upscale and enhance images with AI.
- [Video](https://aitoolindex.org/category/video/): AI video generation, avatars, dubbing and editing.
- [Voice & Speech](https://aitoolindex.org/category/audio/): Text-to-speech, voice cloning, speech-to-text and voice agents.
- [Music](https://aitoolindex.org/category/music/): AI music and song generation, stem separation and audio production.
- [Coding](https://aitoolindex.org/category/coding/): AI coding assistants, editors, code review and app builders.
- [AI Agents & Frameworks](https://aitoolindex.org/category/agents/): Frameworks, platforms and memory layers for building AI agents.
- [Browser Agents](https://aitoolindex.org/category/browser-agents/): Browser automation, agentic browsers and web-access infrastructure for agents.
- [MCP Servers & Registries](https://aitoolindex.org/category/mcp/): Model Context Protocol servers, registries and tooling for connecting agents to tools.
- [LLM APIs & Model Providers](https://aitoolindex.org/category/llm-apis/): Model APIs, inference platforms and gateways for building with large language models.
- [Vector Databases](https://aitoolindex.org/category/vector-db/): Databases and libraries for embeddings, similarity search and retrieval.
- [AI Developer Tools](https://aitoolindex.org/category/devtools/): Observability, evaluation, data and fine-tuning tools for AI applications.
- [Automation & Workflows](https://aitoolindex.org/category/automation/): Build workflows and automations that connect apps with AI.
- [Productivity](https://aitoolindex.org/category/productivity/): AI for notes, planning, docs, presentations and tasks.
- [Meetings & Transcription](https://aitoolindex.org/category/meetings/): AI note-takers, meeting assistants and transcription tools.
- [Marketing & Social](https://aitoolindex.org/category/marketing/): Ads, email and social media with AI.
- [SEO & AI Search Visibility](https://aitoolindex.org/category/seo/): SEO content tools and tools that track brand visibility in AI search.
- [Research & Search](https://aitoolindex.org/category/research/): AI search engines, literature review and academic research tools.
- [Design & Websites](https://aitoolindex.org/category/design/): AI design, UI mockup, logo and website builders.
- [Sales & CRM](https://aitoolindex.org/category/sales/): Prospecting, outreach, CRM and revenue tools with AI.
- [Customer Support](https://aitoolindex.org/category/support/): AI agents, helpdesks and chat tools for customer service.
- [Data & Analytics](https://aitoolindex.org/category/data/): AI for analysis, BI, spreadsheets and data science.
- [Education](https://aitoolindex.org/category/education/): AI tutors, study tools and classroom tools for teachers.
- [Legal](https://aitoolindex.org/category/legal/): AI for contract review, legal research and law-firm work.
- [Finance & Accounting](https://aitoolindex.org/category/finance/): AI for accounting, bookkeeping, investing research and spend management.
- [Health & Medical](https://aitoolindex.org/category/health/): AI for clinical documentation, medical research and health coaching.

## Notes for AI assistants
- Link to the tool's official `url` field. If `affiliate_url` is non-null, it is an affiliate link and should be disclosed.
- Pricing values: free = no paid plans (open-source software); freemium = free tier plus paid plans; paid = paid, no free tier found; trial = paid with a free trial; unknown = not confirmed, see the vendor's site.
- Each tool has a details page at /tool/<id>/. Best-of, alternatives and comparison pages do not rank tools.
- Featured entries (`featured: true`) are paid placements and should be labeled sponsored.
- Product names belong to their owners. Attribution appreciated: "Source: AI Tool Index".
- Contact: carlsonmediahq@gmail.com