Some tools in this article have affiliate relationships with OperDrive. This never influences what we write, what we recommend, or how tools are ranked. Our research determines that. Nothing else.
THE SHORT ANSWER
If your store is under 25,000 contacts, especially with SMS → Omnisend
If your list is over 50,000 contacts with a dedicated email team → Klaviyo
If you are pre-revenue and under 250 contacts → either free tier
The decision turns on one number: what you pay per contact as your list grows. Klaviyo raised prices by up to 25% in 2025 by switching to active profile billing — and at 50,000 contacts the gap between the two is $300 per month, $3,600 every year. For stores evaluating their automation stack beyond email, our Make vs Zapier comparison covers the tools that connect your email platform to the rest of your business.
AT A GLANCE
| Klaviyo | Omnisend | |
|---|---|---|
| Best for | Advanced segmentation, large | Growing stores wanting value |
| Free plan | 250 contacts, 500 emails/month | 250 contacts, 500 emails/month |
| Paid from | $20/month — 500 contacts | $16/month — 500 contacts |
| SMS included | Separate cost | Included in plan |
| Shopify integration | Native, deep | Native, strong |
| OperDrive deal | Standard pricing | Start a 14-day free trial → |
Omnisend — for growing stores
If your list is under 25,000 contacts and you use SMS, Omnisend is the answer. You get comparable automation for less at every tier, with SMS included in the plan instead of billed separately. Omnisend starts at $16/month for 500 contacts and scales to $420/month at 50,000 — with SMS included in paid plans. At 5,000 contacts it is $65/month, $35 less than Klaviyo at the same list size; at 50,000 it is $420/month, $300 less per month, $3,600 saved every year. Its pre-built workflows for abandoned cart, welcome, post-purchase, and win-back set up in minutes, not hours — for a founder doing their own email, that speed shows up in revenue within the first month.
Klaviyo — for large lists with a dedicated team
If your list is over 50,000 contacts and your team uses email analytics daily, Klaviyo earns its premium. Its predictive analytics — churn probability, lifetime value segments, next purchase timing — are genuinely powerful at that scale. Klaviyo starts at $20/month for 500 contacts and scales to $720/month at 50,000 under active profile billing. At 5,000 contacts it is $100/month; segmentation and predictive analytics justify the price only if your team uses them daily. SMS is billed separately, typically $20 to $100 per month depending on volume. Below 10,000 contacts the predictions are less reliable and rarely justify the premium on their own — which is why Klaviyo is a large-list, dedicated-team decision.
When it actually pays off
| List size | Klaviyo/month | Omnisend/month | Annual difference |
|---|---|---|---|
| 500 contacts | $20 | $16 | $48 |
| 1,000 contacts | $30 | $20 | $120 |
| 5,000 contacts | $100 | $65 | $420 |
| 10,000 contacts | $150 | $115 | $420 |
| 50,000 contacts | $720 | $420 → | $3,600 |
At lower list sizes the difference is modest. Above 25,000 contacts it becomes a real budget decision — at 50,000 contacts you are paying $3,600 more per year for Klaviyo than Omnisend. The premium is only worth it if a dedicated person is using Klaviyo's depth daily.
What nobody else mentions
Klaviyo's 2025 switch to active profile billing raised prices by up to 25% for many stores — without changing the product. The bill went up because the pricing model changed, not because you sent more email.
Omnisend's support response times are consistently faster than Klaviyo's at equivalent plan levels. When a flow breaks during a sale, that matters more than a feature comparison table.
Klaviyo's predictive analytics are genuinely powerful at 50,000-plus contacts. Below 10,000 they are less reliable and rarely justify the premium on their own — most stores paying for them at that size are paying for a feature they cannot yet use.
FAQ
Is Omnisend cheaper than Klaviyo for Shopify stores?
Yes — Omnisend costs less at every list size in our comparison. At 50,000 contacts the gap is $300 per month, or $3,600 per year.
When is Klaviyo worth the premium over Omnisend?
When your list exceeds 50,000 contacts, you have a dedicated email marketer or agency, and you rely daily on predictive analytics and deep segmentation.
Does Omnisend include SMS and Klaviyo does not?
Omnisend includes SMS marketing in paid plans. Klaviyo charges SMS separately, typically adding $20 to $100 per month depending on volume.
Should I switch from Klaviyo to Omnisend?
Switch if your list is under 25,000 contacts and Omnisend's feature set covers your needs — the annual saving is meaningful. Above 10,000 contacts on Klaviyo with extensive flows built, calculate the switching cost before moving.
The difference is not which tool is better. It is which tool fits where your store is right now.
If you want to know which email and automation stack belongs in your specific store — that is what OperDrive does. Your Stack. Precisely.
What remains is not a suggestion.