These tools expose an API, so you can call them from your own code rather than working through their interface. This is the list to start from if you are building AI into a product, a script or an automation.
Vectara provides conversational AI assistance for users who want interactive answers, follow-ups and task-focu...
Freemium
Free plan API
Content analysis platform offering AI-writing detection and plagiarism-related checks for academic review.
Freemium
Free plan API
Zoho SalesIQ provides conversational AI assistance for users who want interactive answers, follow-ups and task...
Freemium
Free plan API
11x provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
Freemium
Free plan API
AI Dungeon provides conversational AI assistance for users who want interactive answers, follow-ups and task-f...
Freemium
Free plan API
Airbyte helps developers data integration platform for moving data between sources and destinations, with ai-o...
Freemium
Free plan API
Aisera provides conversational AI assistance for users who want interactive answers, follow-ups and task-focus...
Freemium
Free plan API
Agentic coding tool from Sourcegraph for planning and implementing software changes with repository and tool c...
Paid
API
Cliengo provides conversational AI assistance for users who want interactive answers, follow-ups and task-focu...
Freemium
Free plan API
Crisp AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
CustomBot provides conversational AI assistance for users who want interactive answers, follow-ups and task-fo...
Freemium
Free plan API
Dust provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
Freemium
Free plan API
ElevenLabs Conversational AI provides conversational AI assistance for users who want interactive answers, fol...
Freemium
Free plan API
Gentrace provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
Gladly provides conversational AI assistance for users who want interactive answers, follow-ups and task-focus...
Freemium
Free plan API
Keyword clustering and content planning platform that groups search terms by search intent and SERP similarity...
Paid
API
Kore.ai XO Platform provides conversational AI assistance for users who want interactive answers, follow-ups a...
Freemium
Free plan API
Kustomer IQ provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
Freemium
Free plan API
MongoDB Atlas Vector Search helps developers vector search capability in mongodb for retrieval and ai applicat...
Freemium
Free plan API
Discussion-based learning platform using AI-supported guidance for student participation and writing quality.
Paid
Free plan API
Webex AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
Zendesk AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-f...
Freemium
Free plan API
8x8 Intelligent Customer Assistant provides conversational AI assistance for users who want interactive answer...
Freemium
Free plan API
Balto AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
What to check before you choose
Having an API is the start of the question rather than the end of it. Rate limits, pricing per call, whether there is a sandbox to develop against, and whether your inputs are retained or used for training all vary enormously, and all of them shape whether a tool is viable at scale. Official API documentation is the only reliable source for those details, and it changes often — treat this list as a way to find the candidates, then verify the specifics with the vendor before you build.
