heysteff vs. Klaviyo: asking for reviews and running campaigns on WhatsApp or by email.
Klaviyo is an email and SMS marketing platform for ecommerce. heysteff asks for reviews and sends campaigns over WhatsApp, and an AI agent handles the replies in the same conversation. They aren't mutually exclusive: you can use Klaviyo for email and heysteff for WhatsApp, connected to each other.
◆ in one sentence
Klaviyo is a tool specialized in email and SMS; heysteff asks and converses over WhatsApp, the channel where you already talk to your customers.
What each one is
Klaviyo is a marketing platform for online stores: lists and segments, campaigns and automated flows by email and SMS. Its current features and prices are on its official site.
heysteff is the AI platform for customer service and sales on WhatsApp, Instagram, Messenger, SMS, Gmail and Shopify. Its Shopify app asks for reviews, recovers carts, sends order status updates and runs campaigns over WhatsApp, with the AI agent answering whatever the customer replies.
Asking for reviews: an email versus a conversation
With heysteff there's no form. After delivery, the request arrives on WhatsApp and the review is built in the chat with a fixed script: rating, comment and photo or video. If the customer only answers part of it, whatever they sent is kept. The discount, if you offer one, goes only to those who reply with a photo or a video. If the rating is low, you can reply privately on the same WhatsApp.
◆ a case: from Klaviyo to WhatsApp
Cata Saieg asked for reviews with Klaviyo and 2% of its customers left one; on WhatsApp with heysteff, 68%, according to the brand.
34× the previous rate
This is one store's result, reported by the store to heysteff in October 2026. It isn't a like-for-like comparison between the two tools: with heysteff the review is requested in a WhatsApp conversation. Read the Cata Saieg case, which used to ask for reviews with Klaviyo.
Campaigns: who answers when the customer replies
A heysteff campaign sends a Meta-approved template to a list or a Shopify segment, and if the customer replies with a question, the AI agent answers it right then with your catalog and your policies. Meta charges each WhatsApp message based on its category and the country.
How each one charges
Klaviyo's prices are on its official site. heysteff's Shopify app has four plans with the same modules and charges for usage from the first unit: Free (0 USD a month, 0.10 USD per review request), Starter (19 USD, 0.04), Growth (59 USD, 0.03) and Pro (99 USD, 0.025). heysteff's web plans charge per conversation: Starter 149, Pro 299 and Max 549 USD a month.
Using them together
heysteff's Shopify app integrates with Klaviyo: every time a review comes in it sends an event ("Review Received" or "Low Rating Review") so your email flows can react. The event needs the customer's email. What you want to avoid is both tools asking for a review of the same order: pick one to send the request.
Where Klaviyo is the better choice
If your strategy lives in email (newsletters, long email flows, designed emails for large lists), Klaviyo is a tool specialized in exactly that. heysteff has email templates with one-click unsubscribe on its web plans, but its core is the WhatsApp conversation.
| Aspect | heysteff | Klaviyo |
|---|---|---|
| What it is | Chat-based service and sales platform with an AI agent, plus a Shopify app for reviews, carts and campaigns on WhatsApp | Email and SMS marketing platform for ecommerce |
| Main channel | WhatsApp (also Instagram, Messenger, SMS and Gmail on the web plans) | Email and SMS |
| How the review is requested | Guided WhatsApp conversation: rating, comment, photo or video | Depends on how you set it up in its channels |
| Who replies to the customer | The AI agent in the same chat, or your team in copilot mode | Outside the scope of this comparison |
| Pricing model | Shopify app: 0 to 99 USD a month plus usage; web plans per conversation | See its official site |
| Published case | Cata Saieg: from 2% to 68% of customers leaving a review, according to the brand | — |
Frequently asked questions
What's an alternative to Klaviyo for asking for reviews on WhatsApp?
heysteff: WhatsApp Marketing, heysteff's Shopify app, asks for the review on WhatsApp after delivery and captures it in the conversation with rating, comment, photo and video. It has a Free plan with no fixed fee, at 0.10 USD per request.
Can I use heysteff and Klaviyo at the same time?
Yes. heysteff's Shopify app sends Klaviyo an event for every review that comes in, so your email flows can react. Only one of the two tools should request the review for each order.
How much did Cata Saieg's review rate go up after moving from Klaviyo to WhatsApp?
Cata Saieg asked for reviews with Klaviyo and 2% of its customers left one; on WhatsApp with heysteff, 68%, according to the brand. The store reported it in October 2026; it isn't a guaranteed result.
Are campaigns cheaper on WhatsApp or by email?
There's no single answer: on WhatsApp, Meta charges each template based on its category and the recipient's country, and in an email tool the cost depends on its own model. It's worth comparing cost per sale, not per send.
Does heysteff replace Klaviyo's email marketing?
It's not its focus. heysteff has email templates with one-click unsubscribe and handles Gmail as a channel on its web plans, but it's built for conversations on WhatsApp.
Do I need the official WhatsApp API to ask for reviews with heysteff?
No. You can connect your number through the official API, coexistence or QR, or let requests go out through heysteff's shared number while you connect yours; in that case Meta's per-message cost plus 10% is added.
◆ next step
See how heysteff asks for the review over WhatsApp and captures it in the conversation, photo included.
Also useful: learn about heysteff's Shopify app in detail, read cart recovery by email, WhatsApp or SMS, or compare heysteff with Judge.me and ManyChat.