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.
Fish Audio provides voice generation for creators, businesses, educators, and developers who need practical au...
Freemium
Free plan API
Flow XO provides conversational AI assistance for users who want interactive answers, follow-ups and task-focu...
Freemium
Free plan API
Freepik AI helps creators generate, edit, or enhance images for practical design and visual-content tasks.
Freemium
Free plan API
Freshdesk supports customer support platform for teams that need a practical business workflow.
Freemium
Free plan API
Freshworks Freddy AI provides conversational AI assistance for users who want interactive answers, follow-ups...
Freemium
Free plan API
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
Grafana helps developers observability platform for dashboards, metrics, logs, traces, and ai-assisted operati...
Freemium
Free plan API
Grafana Assistant helps developers ai assistance for working with dashboards, queries, observability data, and...
Freemium
Free plan API
HubSpot supports crm, marketing, sales and customer service for teams that need a practical business workflow.
Freemium
Free plan API
HubSpot Breeze Customer Agent provides conversational AI assistance for users who want interactive answers, fo...
Freemium
Free plan API
Hume AI provides expressive voice for creators, businesses, educators, and developers who need practical audio...
Freemium
Free plan API
AI-assisted form and workflow platform useful for education surveys, quizzes, applications and feedback collec...
Freemium
Free plan API
Kapwing provides AI video creation and collaborative browser editing for creators, marketers, educators, and t...
Freemium
API
Kits AI provides AI vocals for creators, businesses, educators, and developers who need practical audio workfl...
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
ManyChat AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
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
Language-learning platform combining vocabulary, listening and AI-supported conversation practice.
Freemium
Free plan API
Microsoft Copilot helps users with Microsoft assistant through an interactive AI chat experience.
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.
