heysteff vs. Wizybot: should you pay per message or per conversation?

Wizybot lists a Basic plan at 149.99 USD a month with 2,750 AI messages and 5,000 AI comment replies included. Each extra AI message costs 0.07 USD and each extra comment 0.05. What your team writes isn't charged, and users and human chats are unlimited. For higher volumes it offers a discounted Custom plan, by quote.

heysteff charges per conversation: one customer served within a 24-hour window, on any channel, whether the AI writes two messages or twenty. There's a Free plan with 50 conversations a month and no card, Starter at 149 USD with 500, Pro at 299 with 3,000 and Max at 549 with 5,000. Overage costs 0.50, 0.40 and 0.30 USD per conversation depending on the plan.

With two different units, list prices can't be compared directly. One question decides it: how many messages does the AI write in a conversation?

We reviewed the 26,912 conversations opened in the last 90 days by the 18 heysteff workspaces with the most usage: mostly online stores, plus a few service businesses. We counted messages from the customer, the AI agent, automation flows and the team.

The 6 messages come from taking each business's average and picking the one in the middle. A few long conversations pull averages up: most are solved in a couple of replies, and a few (quotes, exchanges, orders with problems) run to dozens of messages. For comparing costs there's a fairer number: in October 2026, for every conversation heysteff bills, the AI wrote 2.0 messages on average.

That number varies a lot from one business to another, and it's the first thing worth measuring in yours:

Assume the AI handles every conversation. We picked the cheapest plan on each side at three paces: 2 AI messages per conversation (what we measured in October), 4.5 (the average when the agent answers) and 6 (an agent that writes as many messages as a typical conversation has). Prices are list prices; they don't include Wizybot's Custom plan or heysteff's 20% annual discount.

With 2 AI messages per conversation, the two take turns: Wizybot is cheaper up to about 2,400 conversations a month, between about 3,300 and 4,200 (when heysteff is already charging Pro overage and Max doesn't pay off yet) and from about 5,700; heysteff is cheaper from about 2,400 to 3,300 and from 4,200 to 5,700. With 4.5 messages, heysteff is cheaper from about 1,100 conversations and the gap grows with volume. With 6 messages, heysteff is cheaper at every tier: the only exception is between roughly 730 and 810 conversations a month, where Wizybot comes out up to 6 USD cheaper. Try your own numbers:

There's one difference the table doesn't show: with per-message pricing, the cost depends on how much the AI writes. If the agent splits a long answer into several bubbles, asks one more question to understand the order, or the customer comes back three times about their shipment, the bill goes up. Wizybot's pricing page doesn't say whether an answer split into several bubbles counts as one message or several. At heysteff, the same customer served on the same day is a single conversation, whatever the AI replies.

In store integrations: it lists native connections with Shopify, WooCommerce, VTEX and Tiendanube. heysteff has native Shopify and connects the rest through its API tool builder, which works but needs setting up.

In channels: it advertises web chat and Telegram, besides WhatsApp, Instagram, Messenger and email. heysteff is built for messaging: WhatsApp, Instagram, Messenger, SMS and Gmail.

In social media comments: the plan includes 5,000 AI comment replies a month, a separate allowance from messages.

And in how you try it: the first month comes with unlimited AI messages, and they offer a refund if the tool doesn't pay for itself that month. If your human team replies a lot and the AI little, per-message pricing works in your favor, because what people write isn't charged.

Two-way SMS with your own number: replies to an SMS land in the same inbox and the agent can answer them, and SMS campaigns go out with automatic opt-outs and the cost shown before you send. Wizybot doesn't list SMS among its channels.

A permanent Free plan: 50 conversations a month on one channel, no card and no deadline, to try it with your own WhatsApp before paying. When it hits the cap it pauses; it doesn't charge.

Copilot mode, which suggests replies to your team while they handle a chat instead of just switching the bot off when a person steps in. Appointment scheduling with Google Calendar, for businesses that sell time as well as products. Product reviews over WhatsApp, with its own Shopify app. And conversation analytics, which tells you every week what your customers write to you about and where sales get lost.

The data comes from heysteff's production database on November 3, 2026: conversations created in the previous 90 days, in workspaces with at least 20 conversations, excluding internal and test accounts. An AI message is one written by the agent; messages from flows, campaigns and team members don't count. Business names are omitted. Wizybot's prices are those on wizybot.com on the same date. More details in our methodology (in Spanish).

You may also find useful: compare heysteff with Chatsell, Tidio and Mercately, or check heysteff pricing and abandoned cart recovery.