Build a custom AI chatbot on your own documents, give it your brand and tone, and embed it anywhere with a single line of code. Answers are drawn from your content, with checks that reduce invented details. AI can still make mistakes.
Build your agent — free See how it worksA complete custom AI chatbot for your website — trained on your knowledge, branded as yours.
Paste text or upload your docs. Retrieval-augmented generation (RAG) grounds every answer in your own content.
Drop a single <script> tag on any site — WordPress, Shopify, Webflow or plain HTML. Live in minutes.
Set the name, persona, tone, accent colour and welcome message. Pro adds a custom mascot and hides the widget footer link.
The agent is instructed to answer from your knowledge base and to say when it doesn't know. Checks catch many invented details, but not all.
Per-IP throttling, monthly chat caps and Pro domain locking keep your agent — and your costs — under control.
Everything is point-and-click in Helper Studio. No servers, no pipelines, no maintenance.
From zero to a live AI chatbot on your website in three steps.
Paste text or upload your FAQs, docs and policies.
Pick a name, persona, tone, colour and mascot.
Copy the snippet onto your site — that's it.
Start free. The AI agent is just the start — every paid plan also unlocks our entire suite of 25 AI tools.
Basic & Pro don't just power your website agent — they unlock everything on The Prompt Index: Prompt Generator & Optimizer, AI Humanizer, Image Labs, Sound Labs, AI Study Studio, AI CV Builder, Decision Lab, Slide Studio, Search & Cite, SignalScope, PromptBook and more. The value is, frankly, insane.
Everything about building an AI agent for your website.
An AI agent (also called an AI chatbot or AI assistant) is a chat widget you embed on your site that answers visitors' questions instantly. Ours is trained on your own content — your FAQs, docs and policies — so answers are based on your information rather than generic web data. Like any AI, it can occasionally get things wrong.
No. You build and train your agent in Helper Studio with no code, then copy one line of HTML onto your site. It works on any website — WordPress, Shopify, Webflow, a plain HTML page, anything.
You paste text or upload your documents and we index them using retrieval-augmented generation (RAG). When a visitor asks a question, the agent finds the most relevant passages from your content and writes an answer from them. It is instructed to say it doesn't know rather than guess, though no AI gets this right every time.
It's free to start. The Free plan includes one agent; Basic and Pro unlock more agents, documents and monthly chats, plus a custom mascot, domain locking and badge removal on Pro.
Yes — set the name, persona, tone, accent colour and welcome message. Pro users can upload a custom mascot image and hide the widget footer link.
Yes. If your site sends a CSP, allow our domain by adding https://www.thepromptindex.com to your script-src, style-src, connect-src and img-src directives. Sites without a CSP need no changes at all — just paste the one line.
Build a custom AI chatbot trained on your data, free — and embed it on your website in minutes.
Build your agent — free