- Pick it if you are:
- High-volume Shopify stores ($1M+ revenue); D2C brands with complex customer journeys
- Top complaint:
- Repeated price rises - 2022 increase and up to 25% auto-upgrades in 2025
- Price:
- Free plan, paid from $20/mo
- Pick it if you are:
- Small Shopify stores starting email; Stores migrating from Mailchimp
- Top complaint:
- Omnisend SMS now requires the Pro plan and is billed separately
- Price:
- Free plan, paid from $16/mo
Score Comparison
Signals Comparison
Klaviyo
- Repeated price rises - 2022 increase and up to 25% auto-upgrades in 2025(10/10)
- Pricing based on ALL profiles, not just active subscribers(9/10)
- Too expensive for small e-commerce startups(7/10)
- Billing now counts all active profiles, so bills jump after the Feb 2025 change(8/10)
- SMS credits cost extra on top of already expensive plans(6/10)
Omnisend
- Omnisend SMS now requires the Pro plan and is billed separately(8/10)
- Omnisend price jumps as your contact count grows(7/10)
- Legacy Pro plan retired in October 2026 and accounts were migrated(7/10)
- Standard plan add-ons cost extra(5/10)
Klaviyo
- No phone support - email and chatbot-based help only(8/10)
- Support just repeats documentation without real help(7/10)
- Compliance reviews and disabled accounts get slow or no replies(8/10)
Omnisend
- Support reported as slow with repeated explanations(7/10)
Klaviyo
- Accounts suspended without warning or explanation(9/10)
Omnisend
No signals
Klaviyo
- Segment loading and template editor painfully slow(7/10)
- Klaviyo emails going to spam or the Promotions tab(8/10)
Omnisend
No signals
Klaviyo
- Steep learning curve despite powerful features(5/10)
- Basic functions unnecessarily complex and time-consuming(6/10)
Omnisend
- Automation is less flexible than Klaviyo for complex flows(6/10)
- Limited templates and an email editor some find unintuitive(5/10)
- Automation workflow not sending or contacts not entering(7/10)
- Uninstalling the Shopify app deletes the Omnisend account(8/10)
Klaviyo
- Duplicate profiles created with no easy way to merge(7/10)
- Shopify events stop syncing and abandoned cart flows don't trigger(8/10)
Omnisend
- Shopify or WooCommerce data not syncing correctly(7/10)
- Some users switch to Klaviyo after bugs and attribution gaps(6/10)
Klaviyo
No signals
Omnisend
- Emails going to spam or Promotions after switching to Omnisend(8/10)
- Account suspended or blocked before any email is sent(9/10)
- Scheduled SMS campaigns occasionally fail or arrive late(6/10)
Pricing Comparison
Klaviyo
Users: 1 user
Storage: Not specified
Limits: 500 emails/month to 250 active profiles, $5/month of mobile messages, 1 user, email support only for the first 60 days, $5 Composer usage, reviews for 50 orders/month
Users: Not specified
Storage: Not specified
Limits: Email only. SMS requires upgrade or credits. No phone support.
Users: Not specified
Storage: Not specified
Limits: No dedicated CSM, SLA, SSO or multi-account billing below the Custom tier. SMS credits cost extra.
Users: Not specified
Storage: Not specified
Limits: Contract pricing
Omnisend
Users: 250 contacts
Limits: No SMS, Omnisend branding required, 250 contacts and 500 emails per month cap
Users: From 500 contacts
Limits: No SMS, add-ons cost extra
Users: Priced by contact tier
Limits: SMS credits needed on top of the plan
Limits: Pro plan required since May 4, 2026
Limits: Sales contact needed
Feature Comparison
| Feature | Klaviyo | Omnisend |
|---|---|---|
| Email campaigns All plans | ||
| Automation | ||
| Abandoned cart automation | ||
| Automation flows All plans | ||
| Split testing inside workflows Reviewers say not available | ||
| Marketing | ||
| SMS marketing Email + SMS plan or credits | ||
| Lead capture | ||
| Signup forms and popups | ||
| Landing pages | ||
| Integrations | ||
| Shopify integration Best-in-class | ||
| WooCommerce integration Good but not as deep | ||
| Shopify, WooCommerce, BigCommerce integrations | ||
| Channels | ||
| SMS/MMS Pro only, billed separately | ||
| Web push | ||
| Analytics | ||
| Revenue attribution Detailed ROI tracking | ||
| Predictive analytics CLV, churn risk | ||
| Audience | ||
| Dynamic segmentation Real-time updates | ||
| Segmentation | ||
| Testing | ||
| A/B testing All plans | ||
| Pricing | ||
| Free plan 250 contacts, 500 emails | ||
| Pay-per-email pricing Profile-based only since 2025 | ||
| Support | ||
| Phone support Not available at any tier | ||
| Personalization | ||
| Product recommender Pro or add-on | ||
| Data | ||
| Profile merge tool Requires API/manual work | ||
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