If you've been quoted anywhere from "$99/month" to "$20,000 project" for a WhatsApp AI agent, you're not imagining things — the range is genuinely that wide, because the term covers everything from a glorified auto-reply to a fully custom system wired into your calendar, CRM and payment processor.
At the low end, no-code chatbot builders charge $20–$100/month for keyword-triggered replies. They're fine for FAQs, but they don't book appointments, don't hand off intelligently to a human, and break the moment a customer asks something slightly off-script.
At the high end, agencies quoting five figures are usually building bespoke infrastructure for enterprise clients with complex integrations — often more than a single-location business actually needs.
For a real business — one location, a handful of common questions, a calendar to fill — the honest range is a one-time setup fee between $1,500–$3,000 to build and train the agent on your specific business, plus a monthly fee of $200–$500 to keep it running, monitored and updated.
The math that matters isn't the sticker price, it's the comparison: a part-time employee answering messages 20 hours a week costs more than most of these monthly plans, and doesn't work nights, weekends, or holidays.
The question to ask any agency quoting you a price: what happens if it's not live in two weeks? If there's no concrete answer, that's the real red flag — not the price itself.
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