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.
ProWritingAid helps writers turn drafts, chapters, or documents into editing suggestions, reports, and selecte...
Freemium
Free plan API
QuillBot helps writers turn existing text, passages, or documents into paraphrased, summarized, or corrected v...
Freemium
Free plan API
Relay.app provides conversational AI assistance for users who want interactive answers, follow-ups and task-fo...
Freemium
Free plan API
Replicate provides AI-assisted capabilities for developers and software teams.
Freemium
Free plan API
Riverside provides remote recording for creators, businesses, educators, and developers who need practical aud...
Freemium
Free plan API
SambaNova Cloud provides AI development or engineering capabilities.
Paid
API
Scenario helps creators generate, edit, or enhance images for practical design and visual-content tasks.
Paid
API
ScholarAI helps researchers work with source material, analyze information, and organize research tasks in a f...
Freemium
Free plan API
Scite provides research platform that adds citation context to help users inspect how papers are discussed for...
Freemium
Free plan API
All-in-one SEO platform for keyword research, rank tracking, competitor analysis, backlinks and site auditing.
Paid
API
ServiceNow Now Assist provides conversational AI assistance for users who want interactive answers, follow-ups...
Freemium
Free plan API
SnapLogic supports integration and automation for teams that need a practical business workflow.
Freemium
Free plan API
Talkie provides conversational AI assistance for users who want interactive answers, follow-ups and task-focus...
Freemium
Free plan API
Task manager with AI-assisted workflows for organizing personal and team tasks, projects, priorities, and recu...
Freemium
Free plan API
Together AI helps users with AI inference platform through an interactive AI chat experience.
Paid
API
Wolfram|Alpha provides computational answers for mathematics, science, statistics, and factual queries for lea...
Freemium
Free plan API
WPS AI helps users create or improve presentation content with AI for faster slide, visual, or delivery workfl...
Freemium
Free plan API
AI21 Labs provides conversational AI assistance for users who want interactive answers, follow-ups and task-fo...
Freemium
Free plan API
Boost.ai provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
Budibase helps developers open-source platform for building internal tools and business applications..
Freemium
Free plan API Open source
Bun helps developers javascript runtime and toolkit with package management, bundling, testing, and developmen...
Free
Free plan API Open source
Canva provides AI-assisted video creation inside a visual design platform for creators, marketers, educators,...
Freemium
API
Cartesia provides real-time voice for creators, businesses, educators, and developers who need practical audio...
Paid
API
Chai provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
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.
