Free WhatsApp chatbot: what is actually free in 2026, what free costs you, and the honest middle path

You want WhatsApp to answer customers without paying for software. That is possible, up to a point. This guide shows exactly what you can get for free today, the real limits on every free plan we checked, and the point where free starts costing you more than it saves.

By Ritchie, ReplyKit · Published 15 October 2026 · 10 min read

Is there a free WhatsApp chatbot?

There are three kinds of free, and they are very different. The WhatsApp Business app is free and has simple automatic messages built in. Some chatbot platforms have free plans with small caps. And open-source code is free to download, but not free to run. None of them gives a small business a chatbot that actually answers customer questions from its own information, at real volume, for nothing.

A quick definition helps here. A chatbot is software that replies to messages for you. A rule-based chatbot follows buttons and keywords you set up. An AI agent reads the customer's message in their own words and answers from your business information. Most "free" offers are the first kind, or the second kind with a tiny allowance. We explain the difference in chatbot vs AI agent.

What the free WhatsApp Business app can do

The WhatsApp Business app is free and gives you three automatic or semi-automatic tools: a greeting message, an away message and quick replies. WhatsApp's help centre describes the app as free to download and free to use for small businesses.

What the app cannot do: read a question and answer it. A greeting says "Hi, thanks for messaging", and the customer still waits for you to reply to "Do you have a slot on Saturday?" If that is what you need, the app is the floor, not the solution. We cover setup step by step in how to set auto reply on WhatsApp.

One more built-in option is appearing in 2026. Meta Business Agent, Meta's own AI, is being switched on inside the WhatsApp Business app for some businesses. WhatsApp's help centre says it is only available in limited countries to select businesses so far, and that greeting messages are turned off when it is connected. If you see "AI agent" in your Tools tab, it is worth a look; our Meta Business Agent explainer covers what it does.

Which chatbot platforms have a free plan for WhatsApp?

Several do, but the free plans are small and some do not include WhatsApp at all. We opened each vendor's own pricing page in October 2026. Prices change often, so check before you sign up.

Each of these is a real product with real strengths. ManyChat is excellent for Instagram and Messenger. Tidio is a strong website live chat. Botpress gives developers a capable builder. AiSensy is built for broadcasts on the official API. The point is only that "free" on these platforms means a trial-sized allowance, and WhatsApp often sits behind the first paid tier.

Do you pay Meta if your chatbot uses the official API?

Usually yes, beyond a free allowance. Platforms that connect through the official WhatsApp Business Platform pass on Meta's per-message charges, and from 1 October 2026 that includes ordinary replies.

Meta's pricing documentation says it charges per delivered message by category and country. As of 1 October 2026 Meta resumed charging for service messages (normal replies inside the 24-hour window after a customer writes), with a free tier of 1,000 service messages per business phone number per month. After that, each reply is charged. Meta also says that without a payment method, service messages stop being delivered once the free tier is used. Replies sent within a free entry point window, which opens when someone messages you from a Click to WhatsApp ad, are not charged. The full breakdown is in our WhatsApp Business API pricing guide.

So a "free" chatbot plan on the official API can still produce a Meta bill once you pass 1,000 replies a month on a number. Say a dental clinic gets 40 messages a day and the bot sends two replies to each: that is roughly 2,400 replies a month, well past the free tier.

Can you build a WhatsApp chatbot for free with open source?

You can download the code for free. Running it is not free. Popular open-source libraries such as whatsapp-web.js and Baileys connect to WhatsApp as a linked device, the same way WhatsApp Web does.

Both projects say plainly that they are not affiliated with WhatsApp. The whatsapp-web.js readme warns that WhatsApp does not allow bots or unofficial clients and that using it is not guaranteed to avoid a block. WhatsApp's own help centre says that linking your account to an unofficial app may result in a temporary or permanent ban. Then you still need a server that stays on all day (cloud servers start at a few dollars a month, for example DigitalOcean's smallest at $4), an AI service billed per use if you want real answers, and someone to fix it when WhatsApp updates. We go through the whole build in open-source WhatsApp bot vs hosted.

What free really costs: time and risk

Free options cost you in setup hours, upkeep and, for unofficial tools, the chance of losing your number. Here is the honest picture. Time figures are our estimates for a non-technical owner, not measurements.

The hidden cost is the same in every row: the customers who message while nobody answers. Research on response times, summarised in our response time guide, shows how fast leads cool. A free tool that only says "we will get back to you" does not change that.

How to make a WhatsApp chatbot for free, step by step

Start with what costs nothing, and only pay when you can see the gap. This order works for most small businesses.

1. Install or switch to the WhatsApp Business app. You can move your existing number from regular WhatsApp; WhatsApp's help centre recommends making a backup first.
2. Fill in your business profile, including hours. The "outside of business hours" away schedule only works if hours are set.
3. Turn on a greeting and an away message that tell people when you will reply and what to send you. Our after-hours templates help.
4. Save your ten most common answers as quick replies. Prices, location, hours, booking steps.
5. Write those answers down as a one-page FAQ. You will need it for any bot, free or paid.
6. Count for one week how many messages arrive when you cannot reply. If it is a handful, stop here. If it is dozens, test an AI agent on that FAQ.

Where ReplyKit fits, and when it does not

We make ReplyKit, so weigh our view accordingly. ReplyKit is a paid AI agent with a free trial: 7 days, no credit card, 300 AI replies, and nothing is charged unless you choose a plan. It answers WhatsApp and website chat from your own content (your website, PDFs, price lists and Q&A), books appointments into real open slots, scores leads and hands a chat to you in one click. If the answer is not in your content, it says so and flags the question for you to teach once, instead of guessing.

It connects through Quick Connect, which scans a QR code and pairs your number as a linked device. That is unofficial: it is not the WhatsApp Business API, Meta does not sanction it, and a number can be restricted. Read will WhatsApp ban my number for automation? before you connect. We reduce the risk with replies only (no broadcasts or cold outreach), default limits of 30 AI replies an hour and 200 a day per number, and a warm-up for new numbers, and we recommend a dedicated number. Because it does not use the official API, there are no Meta fees. After the trial, plans are $29, $49 or $99 a month; see pricing.

ReplyKit is not the right choice if you need broadcasts or marketing campaigns, the green tick, Instagram or Messenger, or zero tolerance for a number restriction. For those, an official-API platform is the better route. And if you get five messages a week, the free Business app is enough. If you are somewhere in between, a free trial on your real questions will tell you more than any comparison table.

Frequently asked questions

ReplyKit is an independent product and is not affiliated with or endorsed by Meta or WhatsApp. Prices and free plan limits for other vendors are taken from their public pricing pages as checked in October 2026 and may change. Meta's pricing is summarised from its developer documentation as of October 2026.