Omnisend is the email and SMS marketing platform that punches above its weight by being unapologetically ecommerce-first and significantly cheaper than Klaviyo at most contact tiers. For shops between Mailchimp and Klaviyo on the maturity curve — or for cost-conscious operators who want serious marketing automation without the price step-up — it has quietly become the default recommendation.
What it actually does for ecommerce sellers
Omnisend handles email campaigns, SMS, web push, and the automation flows that connect them — all with native ecommerce data wired in via Shopify, BigCommerce, WooCommerce, Wix, and Magento integrations. The pre-built ecommerce flows (welcome series, abandoned cart, browse abandonment, post-purchase, win-back, lapsed-customer) are the part that gets a small team to revenue contribution within a week of installing.
The differentiator versus Mailchimp is the genuinely native handling of ecommerce events: products in cart, viewed products, order data, and customer lifetime metrics flow into the system without the gymnastic webhook setup that Mailchimp historically required. The differentiator versus Klaviyo is price and simplicity — Omnisend’s flow editor is more guided, the templates are more shop-ready, and the contact-tier pricing is less aggressive at the small-shop range.
The 2024-2025 platform additions include AI-generated subject lines, send-time optimisation, smart segmentation suggestions, and improved A/B testing across both email and SMS. Reviews and on-site conversion tools (popups, sign-up forms, gamified spinners) round out a stack that for many small shops is the only marketing platform they need.
Best for
- Small to mid-market Shopify and WooCommerce shops doing £5,000-£100,000 monthly revenue.
- Cost-sensitive operators who want the core of Klaviyo’s capability at roughly half the price.
- Solo founders and two-person teams running email and SMS without a dedicated marketing manager.
- Shops migrating from Mailchimp who need ecommerce-native automation but find Klaviyo’s complexity a barrier.
Larger DTC brands with sophisticated segmentation needs, big SMS programmes, or multi-store data unification will eventually outgrow it — Klaviyo’s data model and predictive analytics are deeper, and the gap shows up at scale.
Pricing breakdown
Three tiers as of 2026: Free covers up to 250 contacts and 500 emails monthly with all features unlocked (the most generous free tier in this category — useful for genuine small-shop operations). Standard starts at roughly £14 per month for 500 contacts, scaling to £45 for 5,000 and £130 for 25,000. Pro adds free SMS credits proportional to spend, web push, advanced reporting, and starts at roughly £45 per month for 2,500 contacts.
The Pro tier becomes the better deal once you are sending SMS regularly because the bundled credits offset the price difference. For email-only operators, Standard is enough. The contact-based pricing means active list cleaning matters — drop unengaged profiles every quarter to keep the bill in check.
Where it falls short
Omnisend’s segmentation, while good, does not reach Klaviyo’s depth for shops that genuinely need predictive lifetime value, churn risk scoring, or complex behavioural triggers. If your strategy depends on segmenting “high-LTV customers who haven’t purchased in their typical inter-purchase interval”, you’ll find the limits of Omnisend’s approach.
The flow builder is more guided than Klaviyo’s, which is good for newcomers but frustrating for power users who want fine-grained control over branch logic, time delays, and conditional splits. Most teams hit a use case a year in where they wish for more flexibility and either workaround through clever segmentation or upgrade.
SMS coverage is solid in major markets (UK, US, Canada, EU) but thinner in emerging markets, and the deliverability tooling is less developed than Klaviyo’s. For shops with international SMS programmes, expect to verify market-by-market rather than trusting a single global capability.
Finally, the customer reviews tool inside Omnisend is functional but not best-in-class — most shops pair it with a dedicated reviews tool like Junip or Yotpo when reviews are a strategic priority.
Compared to the alternatives
The realistic competitive set, in order of overlap: Klaviyo is the upmarket alternative, more powerful but meaningfully more expensive once contact counts cross 5,000. Mailchimp is the legacy option many shops are migrating away from, easier to leave than to defend — ecommerce-native flows are the gap that makes Omnisend the natural successor. Brevo (formerly Sendinblue) is the budget alternative with cheaper tiers but a thinner ecommerce integration story; fine for newsletters, weak for behavioural automation. Sendlane and Drip occupy similar mid-market positions but with smaller user bases and fewer agency partners.
Shopify Email is the in-platform option, free up to a generous quota, and the right answer for shops sending one or two campaigns a month with no automation needs. The realistic decision matrix: Shopify Email for the smallest shops, Omnisend for the bulk of the mid-market, Klaviyo once segmentation depth becomes the constraint.
Our take
For Shopify and WooCommerce shops under £100,000 monthly revenue with email and SMS as primary marketing channels, Omnisend is the highest-leverage spend in the category. The free tier is genuinely usable, the Standard tier covers most operators, and the platform earns its keep with native ecommerce integration and pre-built flows. The transition point to Klaviyo comes when segmentation depth, predictive analytics, or unified customer data become the constraint — which is later than most shops assume. For a brand starting out today, default to Omnisend, run for two years, and only re-evaluate when the platform’s limits become a measurable revenue ceiling.
FAQ
Is Omnisend better than Mailchimp for Shopify?
For ecommerce specifically, yes — the native Shopify integration is deeper, the ecommerce-specific automation templates work out of the box, and the contact-based pricing does not punish you for active engagement the way Mailchimp’s send-volume model can. Mailchimp wins for non-ecommerce use cases.
How does Omnisend compare to Klaviyo on price?
At small contact counts (under 5,000), Omnisend is roughly 30-40% cheaper. The gap narrows at higher tiers; above 25,000 contacts the price difference is smaller and the capability gap (in Klaviyo’s favour) is wider. Below 5,000 contacts the pricing case for Omnisend is strong; above 25,000 it depends on how much segmentation depth you actually use.
Does Omnisend support GDPR-compliant marketing in the UK?
Yes — full consent management, double opt-in flows, automatic suppression of unsubscribed contacts, and DPA documentation suitable for UK and EU compliance. The standard PECR considerations for SMS apply (express consent required, easy opt-out in every message); Omnisend’s SMS workflows are built around them.