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.
Google Cloud Text-to-Speech provides cloud speech for creators, businesses, educators, and developers who need...
Paid
API
Google Dialogflow provides conversational AI assistance for users who want interactive answers, follow-ups and...
Freemium
Free plan API
Gorgias provides conversational AI assistance for users who want interactive answers, follow-ups and task-focu...
Freemium
Free plan API
Grafana helps developers observability platform for dashboards, metrics, logs, traces, and ai-assisted operati...
Freemium
Free plan API
Hume AI provides expressive voice for creators, businesses, educators, and developers who need practical audio...
Freemium
Free plan API
Kore.ai XO provides conversational AI assistance for users who want interactive answers, follow-ups and task-f...
Freemium
Free plan API
Krisp provides noise cancellation for creators, businesses, educators, and developers who need practical audio...
Freemium
Free plan API
Kustomer AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
Freemium
Free plan API
Lex helps writers turn document text, prompts, notes, or an outline into drafts, rewrites, outlines, and edito...
Freemium
Free plan API
LOVO AI provides AI voiceover for creators, businesses, educators, and developers who need practical audio wor...
Freemium
Free plan API
Maxim AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
MemGPT provides conversational AI assistance for users who want interactive answers, follow-ups and task-focus...
Freemium
Free plan API
Microsoft Copilot helps users with Microsoft assistant through an interactive AI chat experience.
Freemium
Free plan API
MiniMax Audio provides voice and audio AI for creators, businesses, educators, and developers who need practic...
Freemium
Free plan API
Mockoon helps developers open-source api mocking tool for creating local and hosted mock endpoints..
Free
Free plan API Open source
Monday AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-fo...
Freemium
Free plan API
Visual work management platform with AI features for projects, workflows, documents, and business operations.
Freemium
Free plan API
Monica provides conversational AI assistance for users who want interactive answers, follow-ups and task-focus...
Freemium
Free plan API
Nearpod provides interactive lesson platform with AI-assisted content creation and formative assessment for le...
Freemium
Free plan API
Nextiva AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-f...
Freemium
Free plan API
Observe.AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-f...
Freemium
Free plan API
Onyx provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
Freemium
Free plan API
OpenAI API helps developers developer platform for integrating openai models and ai capabilities into applicat...
Paid
API
Oracle AI Agent Studio provides conversational AI assistance for users who want interactive answers, follow-up...
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.
