Ask five vendors what a WhatsApp chatbot costs and you get five numbers you cannot compare. Each quotes a different layer of a three-layer cake. The layers are Meta's per-conversation fee, the platform fee on top, and the cost of building the bot itself.
Here are all three layers in rupees, what moves each one, and the cases where the honest answer is that you do not need the bot yet.
Layer one: Meta's per-conversation fee
Meta charges per 24-hour conversation window. The rate depends on who started it and why. Marketing conversations cost the most, roughly ₹0.78–₹0.88 in India. Utility conversations — order updates, appointment reminders — run lower. Service conversations are cheapest, and user-initiated windows have a free tier.
The practical consequence: a bot that mostly answers inbound questions costs a fraction of one that blasts promotions. The conversation mix is the single biggest driver of the monthly bill. It is the one most pricing pages leave out.
Layer two: the platform fee
You do not talk to Meta's API directly. You go through a Business Solution Provider or a platform built on one. Their pricing takes three shapes: a flat monthly fee (₹1,000–₹10,000+), a per-message markup on Meta's rates, or a per-seat model borrowed from helpdesks.
The trap: per-message markups look tiny until you multiply by real volume. A ₹0.15 markup on 50,000 monthly conversations is ₹7,500 of pure margin for the platform. Flat-fee-plus-Meta-at-cost is the structure to push for. It is the one we use.
Layer three: the build
A template bot that answers five FAQs from a menu costs almost nothing and is worth it. A bot that qualifies a lead, checks real order status, books a slot, hands to a human with context, and logs everything — that is a custom build, priced once as a project. The range is wide because the work is wide. But it is a fixed number you agree before anyone writes code.
When a WhatsApp bot is the wrong spend
If your customers do not already message you on WhatsApp, a bot automates an empty queue. If your volume is a handful of conversations a day, a human with the Business app is faster and free. If the goal is broadcast marketing to cold lists, the economics and Meta's quality rating will both punish you within weeks. The bot pays when the conversations already exist and the humans are drowning.
What we charge
We build the custom layer and pass Meta's fees through at cost. No per-message markup. The build is a fixed project price sized to the workflows, and a third of our fee rides on the number the bot is supposed to move.