Omnisend is cheaper and easier to get started with; Klaviyo costs more but gives you finer segmentation and more automation depth once you're past the first few flows. Both are legitimate choices for a Shopify store, and most of what's written about this comparison stops at pricing and feature checklists. Here's the pricing, what each platform's AI actually does today, and a straight answer on which to pick.
What's the actual price difference between Omnisend and Klaviyo?
Both start free, then diverge quickly.
| Omnisend | Klaviyo | |
|---|---|---|
| Free plan | 250 contacts, 500 emails/mo, 500 web push/mo | Up to 250 profiles, 500 emails/mo, $5/mo of SMS and $5/mo of Composer AI usage included |
| First paid tier | Standard: $11.20/mo — 500 contacts, 6,000 emails/mo, unlimited web push, no SMS included | Email plan: around $20/mo at 500 active profiles |
| Mid tier | Pro: $41.30/mo — 2,500 contacts, unlimited emails, SMS from $0.007/message | Around $30/mo at 1,000 active profiles, scaling up from there |
| Billing basis | Contacts on your list | Active profiles (anyone you could email, not just subscribers) |
The gap holds at every tier: Omnisend is consistently cheaper for the same rough list size. The catch is Klaviyo bills on active profiles, which includes unsubscribed and unengaged people you could still message, so your actual bill can land higher than the sticker price suggests if your list has a lot of dead weight. Clean your list before comparing the two on price.
Which has stronger features for a Shopify store?
Both sync products, orders, and customers from Shopify automatically, no middleware required. Where they split:
- Segmentation. Klaviyo's segment builder supports more conditions and nested logic. Omnisend's is simpler and covers the common cases (purchase history, engagement, location) without much depth past that.
- Automation flows. Both have prebuilt flows for welcome, abandoned cart, and post-purchase. Klaviyo has more granular trigger options, like splitting flows by first-time versus repeat buyer or by specific product collections.
- SMS. Omnisend's SMS is bundled into its pricing model from the Pro tier up. Klaviyo treats SMS as a separate line item on top of email, billed by message volume.
- Reporting. Klaviyo's analytics go deeper, including predictive metrics like expected next order date. Omnisend's reporting is more surface-level: opens, clicks, revenue per campaign.
- Popups and forms. Both include on-site signup forms. Neither is a dedicated popup builder with the targeting depth of something like a standalone popup app.
If your store is under a few hundred orders a month, you likely won't hit the ceiling on either platform's features. The difference matters more once you're running ten or more live flows and want to split them by customer behavior.
Do Omnisend and Klaviyo both have AI now?
Yes, and this is the part most comparisons skip entirely.
Omnisend added AI tools directly in its email builder: an AI copywriting assistant that takes a plain-language prompt ("write a product launch email for our new candle line") and drafts subject lines and body copy in your tone, plus a brand-assets tool that imports your logo, colors, and fonts from your store into the template. There's also a personalized product recommender that inserts products into emails based on a customer's browsing and purchase behavior.
Klaviyo shipped Composer, an AI agent that goes a step further: you give it a prompt and it builds the audience, drafts the email content, and proposes a send strategy, pulling on your account's performance history. It's included on every plan, with $5 of usage per month free even on the free tier.
Here's the honest gap: neither one generates a finished email from your actual product catalog and brand without you prompting and reviewing most of it yourself. Omnisend's tools are prompt-and-suggest. Klaviyo's Composer plans more of the campaign for you but still works from a prompt, not a standing read of your catalog. A dedicated email-generation tool like JetFlow sits on top of either idea: it reads your store's products and branding continuously and produces finished, on-brand emails and popups without a prompt each time. Right now that kind of tool pushes into Klaviyo, not Omnisend, which is worth knowing if "less typing per campaign" is part of your decision. See how that comparison looks against Klaviyo's own templates.
Which one should you pick?
Pick Omnisend if:
- You're sending your first few campaigns and want the lowest cost to start.
- You want SMS and email billed together instead of as separate line items.
- Your segmentation needs are simple: new vs. returning, engaged vs. not, maybe location.
Pick Klaviyo if:
- You're past basic flows and want to split automations by specific customer or product behavior.
- You want predictive analytics (expected next order, churn risk) without a separate tool.
- You want the option to add AI campaign-generation tools on top later; that ecosystem is built around Klaviyo right now.
Either one is fine if you're comparing on price alone and your list is under a thousand contacts. The real cost difference shows up later, as your list and flow count grow.
Where JetFlow fits
We make JetFlow. It doesn't replace Omnisend or Klaviyo: it generates complete emails, flows, and signup popups from your store's products and branding, then exports them into Klaviyo in one click. If you've already picked Klaviyo and your bottleneck is production time rather than platform features, see the full roundup of Klaviyo add-ons for where a tool like this fits alongside everything else.