Klaviyo and Omnisend are the two dominant email marketing platforms for Shopify stores. Both integrate natively with Shopify, both support sophisticated automations, and both have loyal user bases. Choosing between them comes down to your budget, your technical comfort level, and how you want to approach multi-channel marketing.
This is a detailed, honest comparison — not a summary of their marketing pages.
Overview
Klaviyo launched in 2012 with a specific focus on e-commerce. It's built around the idea that email marketing should be powered by real customer data — purchase history, browsing behavior, predictive analytics — rather than simple list management. Klaviyo has become the default choice for serious Shopify brands, and its reputation is largely deserved.
Omnisend takes a different angle: rather than going deep on email alone, it combines email, SMS, push notifications, and even Facebook Messenger into a single workflow. For stores that want a multi-channel approach without managing multiple platforms, this is compelling. Omnisend has also positioned itself as a more accessible and affordable Klaviyo alternative.
For a broader look at the Shopify email marketing landscape, see our complete email marketing guide.
Pricing Comparison
Pricing is where Omnisend has a clear advantage for smaller stores. Here's how they compare at different list sizes:
| List Size | Klaviyo (Email only) | Omnisend (Email + SMS) | |-----------|---------------------|------------------------| | 0–250 contacts | Free (500 email sends/mo) | Free (500 emails/mo) | | 1,000 contacts | ~$30/mo | ~$16/mo | | 5,000 contacts | ~$100/mo | ~$60/mo | | 10,000 contacts | ~$175/mo | ~$115/mo | | 25,000 contacts | ~$400/mo | ~$270/mo |
A few important notes:
- Klaviyo charges based on active profiles (contacts who haven't unsubscribed), not just email-addressable contacts. This can surprise store owners as their list grows.
- Omnisend's pricing includes a meaningful SMS allowance at higher tiers. Klaviyo charges separately for SMS.
- Both have free plans, but Klaviyo's free tier is quite limited at 250 contacts.
If budget is a constraint, Omnisend wins on price at every tier. The gap is significant for smaller stores and closes somewhat at scale.
Feature Comparison
Shopify Integration
Both platforms integrate natively with Shopify without requiring Zapier or third-party connectors. However, Klaviyo's integration is generally considered deeper.
Klaviyo syncs historical order data going back to store launch (not just from the date of connection), pulls real-time browse data at the product and category level, and makes all of this available as segmentation criteria. It also offers predictive analytics — expected date of next purchase, predicted lifetime value, churn risk — built from your store's actual order history.
Omnisend syncs order and product data reliably and supports all the standard e-commerce triggers. Its browse abandonment tracking is solid. Where it lags behind Klaviyo is in the depth of predictive analytics — it offers basic RFM (Recency, Frequency, Monetary) scoring but not the full predictive suite that Klaviyo provides.
For most Shopify stores under 10,000 customers, this difference won't matter much in practice. Both will let you trigger the flows that drive the most revenue.
Automation Builder
Klaviyo's flow builder is powerful and flexible. You can create highly conditional branching logic — splitting flows based on purchase history, engagement, location, predicted behavior — and the visual builder handles complex flows without becoming unwieldy. The learning curve is real, but the ceiling is high.
Omnisend's automation builder is more approachable and comes with a solid library of pre-built workflows: welcome series, cart abandonment, post-purchase, win-back, and more. You can get something running in an afternoon without prior experience. The builder is less flexible for highly complex conditional logic, but for 90% of use cases, it's more than sufficient.
Multi-Channel Support
This is Omnisend's differentiating strength. Its workflows can combine:
- SMS
- Web push notifications
- Facebook Messenger (in select markets)
A single automation can send an email, then follow up with an SMS 24 hours later if the email wasn't opened, then send a push notification — all configured in one place. This is particularly powerful for abandoned cart recovery, where reaching customers across channels increases conversion rates.
Klaviyo also supports SMS (since acquiring a separate SMS tool), but it's handled in a less unified way than Omnisend. You'll pay separately for SMS, and the workflow integration isn't quite as seamless.
If you're investing in SMS marketing alongside email, Omnisend is the stronger choice.
Segmentation
Klaviyo has arguably the best segmentation engine in the e-commerce email space. You can build segments based on:
- Any property in the customer's profile
- Any event (purchased, viewed product, clicked email, etc.)
- Predicted data (lifetime value tier, churn risk)
- Real-time behavior
Segments update dynamically and in real time as customers meet or leave criteria.
Omnisend supports solid RFM-based segmentation and behavioral filters. You can build useful segments for most campaigns. Where it falls short is in the predictive dimension — you can't segment by predicted LTV or churn risk the way you can in Klaviyo.
Reporting and Analytics
Klaviyo offers detailed per-campaign and per-flow reporting, including revenue attribution, conversion rates, and engagement metrics over time. Its attribution model is customizable (you can adjust the attribution window). The reporting is genuinely useful for optimization.
Omnisend provides solid campaign reports and revenue attribution. Its reporting is less granular than Klaviyo's but covers the essentials. You can track revenue per campaign, automation performance, and channel-level attribution.
Pros and Cons
Klaviyo
Pros:
- Deepest e-commerce data integration available
- Best-in-class segmentation and predictive analytics
- Highly flexible automation logic
- Strong deliverability
- Largest library of case studies and community resources
Cons:
- More expensive, especially as list grows
- Higher learning curve for beginners
- SMS is add-on, not native to base pricing
- Can feel overwhelming for simple use cases
Omnisend
Pros:
- Better value at smaller list sizes
- More accessible automation builder
- Native multi-channel (email + SMS + push) in one workflow
- Generous pre-built automation library
- Easier onboarding
Cons:
- Less powerful predictive segmentation
- Fewer third-party integrations than Klaviyo
- Smaller community and fewer resources
- Reporting is less granular
Who Should Use Which
Choose Klaviyo if:
- Your store has over 5,000 contacts and is growing
- You want to use predictive analytics for segmentation
- You have complex automation requirements
- You're a data-driven marketer comfortable with a steeper learning curve
- You already use Klaviyo's SMS product
Choose Omnisend if:
- You're an early-stage store looking for better value
- You want email, SMS, and push notifications in one platform
- You prefer a more guided onboarding experience
- You don't need predictive analytics yet
- Budget is a significant consideration
Also consider Omnisend vs Klaviyo for Shopify-specific features if you want a deeper technical breakdown.
Verdict
Neither platform is objectively better — they're optimized for different situations.
Klaviyo is the better choice for established stores that want to squeeze maximum revenue from their email program. The depth of its data integration, segmentation, and predictive capabilities is genuinely differentiated. If you're managing a store doing $1M+ in annual revenue, the investment in Klaviyo is justified.
Omnisend is the better choice for stores prioritizing value and multi-channel outreach. If you want SMS and push notifications alongside email without paying for three separate tools, Omnisend is purpose-built for that. It's also the right call if you're cost-conscious and don't yet need the advanced features Klaviyo offers.
Not sure where your store falls? Take our tool quiz — we'll ask a few questions and recommend the right platform based on your current size and goals.
Pricing data current as of March 2026. Both platforms update pricing periodically — verify at their official sites before subscribing.