Klaviyo vs Omnisend for Shopify in 2026: the bill, the channels and the limits

The free plans

Klaviyo's free plan covers 250 active profiles and 500 email sends a month. Emails and forms carry "Powered by Klaviyo". Email support lasts for the first 60 days. Set up through the Shopify app, it allows three live automations and one live form. Over the profile cap, sending stops until you are back under it.

Omnisend's free plan sends 500 emails a month to at most 250 contacts. You can upload more contacts, but a campaign reaches a segment of 250 at most. It adds 500 web push notifications a month. SMS on Free is now only for accounts that had SMS before 4 May 2026.

What each bill counts

Klaviyo prices its Email and Email + SMS plans by active profiles. An active profile is one you can still market to. Klaviyo does not charge for suppressed or unsubscribed profiles. So cleaning your list lowers the bill. The Plans tab can take up to 72 hours to show it. Klaviyo's starting price differs by region and profile count on its own pages. Set the slider to your list size on the live page.

Omnisend's Standard plan starts at $16 a month for 500 contacts. It gives 12 emails per billable contact each cycle. Pro starts at $59 a month and sends unlimited email under a fair-use rule. Billable contacts include people from orders or abandoned carts who never opted in. Only unsubscribed contacts drop off. Leaving a contact out of a campaign does not lower the count.

SMS changed at both in 2026

Klaviyo moved mobile messaging from credits to dollars on 13 July 2026. Each message has a price by channel and country. Carrier fees are included. You buy a dollar amount up front, and larger plans pay less per message. Existing paid accounts switched at their first billing cycle after 13 August 2026.

Omnisend made SMS a Pro feature for new plans on 4 May 2026. You buy SMS through a separate credits subscription. Rates start at $0.007 a message at the highest spend. The price depends on monthly spend and country. Legacy Pro plans retire on 26 October 2026 and move to the current Pro automatically.

Channels beyond email

Klaviyo lists email, SMS, MMS, RCS, mobile push and WhatsApp. Mobile push needs your own native app and Klaviyo's SDK. We found no web push on Klaviyo's pages. Some newer channels were in beta in earlier Klaviyo posts, so check availability for your country.

Omnisend sends email, SMS and web push, plus MMS in the US and Canada. It also syncs audiences to Google Customer Match and Facebook Custom Audiences. Google Customer Match has its own spend requirement on the ad account. We found no native WhatsApp sending on Omnisend's pages.

Shopify data and segments

Klaviyo pulls your last 90 days of Shopify data first, then the full history. New events arrive in real time. Profiles carry predicted lifetime value, expected next order date and churn risk. Segments can use all three.

Omnisend syncs contacts, products, orders, carts and browsing. The first sync can take up to 24 hours. After that it runs within minutes. Customers fall into lifecycle stages built on recency, frequency and spend. Omnisend's support pages say lifetime-value segments are not available now.

Reviews and AI

Klaviyo Reviews is a separate product with its own bill. It needs a paid Klaviyo email plan and runs on Shopify and WooCommerce. Omnisend retired its Product Reviews on 5 January 2026. It now works with Judge.me, Yotpo, Loox and Okendo for review requests.

Klaviyo launched its Marketing Agent and Customer Agent in September 2025. The first drafts campaigns, flows and forms from a URL. The second answers shoppers. Omnisend offers a subject line generator, an AI writer and an AI segment builder. It also connects to Claude and ChatGPT through MCP.

Where Idukki fits (ours)

We make Idukki. It displays customer photos and video on your store. It sends no email. Idukki publishes a web feed of your product-tagged posts in the format Klaviyo's web feeds read. That puts real customer photos into a Klaviyo email without copying them by hand. For the rest of your stack, read the best Shopify apps to increase conversion.