heysteff vs. Agentiza: have it built for you or try it yourself.
heysteff is an AI platform for customer support and sales across WhatsApp, Instagram, Messenger, SMS, Gmail and Shopify; Steff is the AI agent that runs it. Agentiza is a WhatsApp AI agent company focused on Latin America, based in Mexico, that designs, trains and hands over a working agent. Both solve the same problem; the difference is who does the work of getting it running.
◆ in one sentence
Agentiza gives you more conversations per dollar and builds the agent for you if you pay for it; heysteff lets you start free with no end date and adds Gmail and reviews over WhatsApp.
Pricing, with the fine print on what counts as a conversation
Agentiza publishes three monthly plans in US dollars: Base at 149 USD with 1,500 conversations a month, Growth at 299 with 4,000 and Scale at 599 with 9,000, plus an Enterprise plan quoted from 12,000. For them, a customer you talk to during the month is one conversation, regardless of messages or templates. We took these figures from their home page; other pages on their site still show earlier plans at 99 and 199 USD. They don't publish annual pricing.
heysteff publishes Starter at 149 USD with 500 conversations, Pro at 299 with 3,000 and Max at 549 with 5,000, with a 20% discount for annual billing and overage of 0.5 to 0.3 USD per conversation depending on the plan. Here a conversation is a 24-hour window opened by a customer, so the same person writing on different days counts more than once. For both reasons, at list price, Agentiza includes more volume for the same money.
Where Agentiza is the better choice
If you want someone else to get it running. Agentiza sells a full four-week implementation for 2,997 USD, as a one-time payment, with a test set of 35 to 40 cases and 90 days of priority support. heysteff doesn't offer that service: you do the setup yourself.
If your volume is high and your customers write several times a month, their way of counting conversations works in your favor. And if you need a chat widget on your website or AI voice: both appear on their site (voice is marked as beta) and heysteff has neither. heysteff transcribes voice notes that arrive over WhatsApp, but it doesn't answer calls.
Where heysteff does things Agentiza doesn't publish
The Free plan doesn't expire: 50 conversations a month forever, versus a 7-day trial. Email lands in the same inbox as WhatsApp and Instagram, with Gmail as a channel; Agentiza doesn't publish that. They don't publish product reviews either: heysteff has its own Shopify app that asks for them over WhatsApp.
For payments and scheduling, heysteff names what it connects to: payment links with Stripe and scheduling with Google Calendar, synced both ways. Agentiza says its agent closes payments and books on your calendar, but doesn't name the payment gateway or the calendar. And copilot mode, which suggests replies to the human agent during the conversation, doesn't appear on their site; they publish handoff to a person with the full context, which is something else.
| Factor | heysteff | Agentiza |
|---|---|---|
| How you start | Permanent Free plan: 50 conversations/month, 1 channel, no card | 7-day trial; optional 2,997 USD implementation (one-time payment, 4 weeks) |
| Price and volume | Starter 149 USD (500) · Pro 299 (3,000) · Max 549 (5,000); 20% off annual | Base 149 USD (1,500) · Growth 299 (4,000) · Scale 599 (9,000); annual not published |
| What counts as a conversation | A 24-hour window opened by a customer | A customer you talk to during the month |
| Channels | WhatsApp (official API and QR connection), Instagram, Messenger, two-way SMS, Gmail and Shopify | Official WhatsApp API, Instagram (DMs and comments), Messenger and web widget |
| Email as a channel | Yes, Gmail in the same inbox | Not published |
| Website chat widget | Not available | Yes |
| AI voice | Transcribes voice notes; doesn't answer calls | Yes, in beta (WhatsApp Voice and phone) |
| Ecommerce integrations | Shopify (from the Pro plan) and WooCommerce; the rest over HTTP APIs and webhooks | Shopify and WooCommerce stated; custom integrations over MCP, API and webhooks |
| Cart recovery | Native with Shopify, over WhatsApp | Stated on their ecommerce page |
| Payment links | Stripe payment link, and it waits for payment confirmation | They state it closes payments; gateway not published |
| Scheduling | Google Calendar, synced both ways | They state it books on your calendar; which one is not published |
| Product reviews | Yes, its own Shopify app that asks for them over WhatsApp | Not published |
| Copilot mode | Yes: suggestions for the human agent and automatic bot pause | Handoff to a human with context; agent suggestions not published |
| Implementation done by the vendor | No, it's self-service | Yes, 2,997 USD over 4 weeks |
Agentiza data taken from agentiza.ai on September 28, 2026. Where their site contradicts itself, we used the home page.
Frequently asked questions
Which one includes more conversations for the same price?
Agentiza, and it's worth saying plainly. For 149 USD a month its Base plan includes 1,500 conversations and counts each customer you talk to during the month as one conversation. heysteff's Starter plan, at the same price, includes 500, and counts one conversation for each 24-hour window a customer opens: if the same person writes on five different days, that's five. At list price, Agentiza gives you considerably more per dollar. heysteff makes up for it elsewhere: a permanent Free plan, a 20% discount for annual billing and channels Agentiza doesn't publish, such as Gmail.
Can I try either one without paying?
Yes, in different ways. Agentiza offers a 7-day trial; its /trial page says it requires no card and no commitment, although other pages on its site mention 14 days or ask for a card. heysteff has a Free plan that doesn't expire: 50 conversations a month on one channel, with no card. It lets you test with real customers for weeks before deciding.
Who sets up the agent?
With Agentiza, if you want, they do: they sell a full 4-week implementation for 2,997 USD, as a one-time payment, and a 149 USD guided session. That's their main offer. heysteff is self-service: you load the knowledge base, connect the channels and tune the agent. If you don't have time for that, Agentiza's implementation is a real advantage.
◆ next step
Try heysteff on the Free plan, no card required, with your own customers, before deciding whether you'd rather have it built for you.
Also useful: compare heysteff with Chatsell, Leadsales and Whaticket, or check pricing and copilot mode.