An AI chat widget for your small business website: what it should do, what it costs, and the one line of code

Most small business websites have a contact form that gets filled in twice a month. A chat bubble that answers questions in seconds and asks for a name and number converts visitors the form never would. Here is what a good AI widget does, what a bad one does, and how to add one without a developer.

By Ritchie, ReplyKit · Published 5 September 2026 · 8 min read

Why a form is not enough

A visitor with a question wants an answer now, not a reply to a form on Tuesday. If your site cannot answer "do you do X" or "how much is Y" in the moment, the visitor opens the next tab. A chat widget that answers from your own content keeps them on the page, and asking "want me to have the team follow up?" at the right moment turns an anonymous visit into a lead with a phone number. The same response-time research that applies to WhatsApp applies here: the HBR study found the odds of qualifying a lead fall steeply with every hour of delay.

What a good widget does

• Answers only from your content. Generic chatbots that answer from the open internet will invent a price or a policy. Yours should answer from your site, your PDFs and your notes, and say "I am not sure" otherwise.
• Captures the lead naturally. When a visitor shows interest, it asks for a name and a phone number or email, and the lead lands in your CRM with the conversation attached.
• Books. For appointment businesses it offers real slots and books them, the same as on WhatsApp.
• Hands over. A visitor who asks for a person gets one; the chat appears in your inbox and you reply from there while they stay on the page.
• Discloses that it is an assistant and keeps a tone you set.
• Loads light and stays out of the way. One small script, no cookies for tracking, no popups on arrival.

In ReplyKit the website assistant is a separate thing from your WhatsApp agent. It has its own instructions and its own knowledge, because a visitor who has not chosen you yet needs a different conversation from a customer who already messaged your number. Both share your inbox, your leads CRM and your monthly reply allowance.

What to avoid

• Widgets that redirect to WhatsApp. Sending a website visitor off to another app loses half of them. Answer on the page.
• Per-conversation pricing. A widget that charges per chat punishes you for being useful. Look for a flat fee with a clear monthly allowance.
• No origin control. Your widget key should only work on your own domains, otherwise anyone can embed your assistant and burn your allowance. ReplyKit lets you list the allowed sites.
• No abuse limits. A bot hitting your site should not drain a month of replies overnight. ReplyKit caps each visitor and each assistant per day and hands over instead of looping.
• Heavy scripts that slow your page and hurt your search ranking.

Adding it: the one line of code

1. Open the Website section in ReplyKit and create an assistant. It starts with a neutral set of instructions you can edit in plain English.
2. Give it knowledge: paste your site's URL to crawl it (up to 100 pages, useful pages first), upload a PDF, or write text.
3. Set the name, greeting and colour, and list the websites allowed to show it.
4. Copy the one-line script and paste it before the closing body tag. On WordPress that is a footer script box or a plugin like Insert Headers and Footers; on Wix, Squarespace and Shopify it is the site-wide custom code setting; on a custom site it is the template footer.
5. Open your site, ask it the hard questions, and watch the conversation appear in your inbox.

Turning the assistant off hides the bubble everywhere without removing the code. Rotating the key invalidates any copy of the snippet you no longer trust.

What it costs

ReplyKit includes one website assistant on the $29 Starter plan, five on Growth and unlimited on Pro, and a website reply counts the same as a WhatsApp reply against your monthly allowance of 1,000, 5,000 or 20,000. There is no per-chat fee. A typical small business site sees a few hundred chats a month, well inside Starter. Our cost guide works through the numbers.

Frequently asked questions

ReplyKit is an independent product and is not affiliated with or endorsed by Meta or WhatsApp. This article is general guidance for running a small business, not legal, financial or regulatory advice.