Best AI Email Marketing Tools for Online Stores (2026)
Shopify Messaging vs Omnisend vs Klaviyo: we compared free plans, prices, email limits, SMS and AI features to find the best email marketing tool for your online store.
Disclosure: We may earn a commission when you buy through links on this page, at no extra cost to you. It never affects our verdicts. How we make money.
Our top picks at a glance
- Shopify Messaging — Best free start on ShopifyFirst 10,000 emails/mo free, then from $1 per 1,000 →
- Omnisend — Best value for email + SMSFree plan; paid from $11.20/mo (billed 3 months upfront) →
- Klaviyo — Best for advanced segmentationFree plan; paid from $20/mo (500 profiles) →
Email is still one of the most profitable channels for an online store: you own the list, there is no algorithm in the way, and automated emails like abandoned-cart reminders keep selling while you sleep. Modern tools add AI for copywriting, product recommendations and send times.
We compared three popular choices on free plans, price, email limits, SMS and AI features.
How we compared these tools
This is a research-based comparison using the official Omnisend and Klaviyo pricing pages and the official Shopify App Store listing for Shopify Messaging (checked November 15, 2026). We did not use the tools ourselves.
Quick answer: which one should you choose?
| Your situation | Our pick | Why |
|---|---|---|
| Shopify store just starting with email | Shopify Messaging | 10,000 free emails a month, built into Shopify |
| Want email + SMS automation at a fair price | Omnisend | Low prices, SMS on Pro, many platforms |
| Growing fast, need advanced segments and data | Klaviyo | Deep segmentation, flows and analytics |
Side-by-side comparison
| Feature | Shopify Messaging | OmnisendOur pick | Klaviyo |
|---|---|---|---|
| Our score | |||
| Price | First 10,000 emails/mo free, then from $1 per 1,000 | Free plan; paid from $11.20/mo (billed 3 months upfront) | Free plan; paid from $20/mo (500 profiles) |
| Free plan | ✅ Yes | ✅ Yes | ✅ Yes |
| Free trial | — | — | — |
| Best for | Shopify stores starting email marketing on a tiny budget | Small and mid-size stores that want email + SMS automation at a fair price | Growing stores that want advanced segmentation and analytics |
| Link | Check price | Check price | Check price |
Pricing for a small list
| Shopify Messaging | Omnisend | Klaviyo | |
|---|---|---|---|
| Free plan | First 10,000 emails/month free | 250 contacts, 500 emails/month | 250 profiles, 500 emails/month |
| Entry paid plan | From $1 per 1,000 emails after the free 10,000 | Standard: $11.20/mo (3 months upfront), 500 contacts, 6,000 emails | Email: $20/mo, 500 profiles, 5,000 emails |
| Next plan | — | Pro: $41.30/mo (3 months upfront), 2,500 contacts, unlimited emails (fair use) | Marketing: $25/mo, 500 profiles |
| SMS | Email, SMS and WhatsApp templates | On Pro, from $0.007 per SMS (US) | Add-on on paid plans |
Prices checked November 15, 2026. Omnisend’s displayed prices include a 30% discount for paying 3 months upfront. Prices for both Omnisend and Klaviyo rise with the number of contacts.
The three automations every store should set up
- Welcome series — greet new subscribers, tell your brand story, and offer a first-order incentive.
- Abandoned cart — remind shoppers what they left behind, usually within a few hours.
- Post-purchase — thank the customer, share care tips, and ask for a review a week or two later.
All three tools on this list include these automations.
What to look for
- Price at your list size. All three are cheap at 500 contacts; check the price at 5,000 and 10,000 contacts too.
- Ecommerce data. Product recommendations and “browsed but didn’t buy” emails need a deep store integration.
- SMS. Useful for flash sales and shipping updates, but check per-message prices for your countries.
- AI features. Subject lines, copy, product recommendations and send-time optimization save time — review AI copy before sending.
How to grow your list
- Add a signup form with a clear reason to join (first-order discount, early access, a useful guide).
- Collect emails at checkout with clear consent, and follow the privacy rules in the countries you sell to (in the EU, GDPR).
- Never buy email lists — it hurts deliverability and breaks the rules.
Want shoppers to understand your products before they click? See our guide to writing product descriptions with AI.
The full list
Shopify Messaging
Shopify's built-in email, SMS and WhatsApp marketing (formerly Shopify Email)
- Price
- First 10,000 emails/mo free, then from $1 per 1,000
- Free plan
- Yes
- Best for
- Shopify stores starting email marketing on a tiny budget
Shopify Messaging (formerly Shopify Email) is built into Shopify: your first 10,000 emails each month are free, then pricing starts at $1 per 1,000 emails. It includes welcome, abandoned-cart and follow-up automations plus AI subject lines and copy — rated 4.8/5 from over 4,800 reviews.
👍 Pros
- First 10,000 emails each month are free
- Welcome, abandoned-cart and follow-up automations
- AI subject lines, body copy and send-time optimization
- Rated 4.8/5 from 4,800+ reviews, 21 languages
👎 Cons
- Only for Shopify stores
- Fewer segmentation and reporting options than dedicated platforms
Omnisend
Ecommerce email and SMS automation with a generous free plan
- Price
- Free plan; paid from $11.20/mo (billed 3 months upfront)
- Free plan
- Yes
- Best for
- Small and mid-size stores that want email + SMS automation at a fair price
Omnisend is built for ecommerce and keeps prices low: a free plan for 250 contacts, Standard from $11.20/month (billed 3 months upfront) for 500 contacts and 6,000 emails, and Pro with unlimited emails (fair use) and SMS from $0.007 per message. Works with Shopify, WooCommerce, BigCommerce, Wix and more.
👍 Pros
- Free plan: 250 contacts and 500 emails a month
- Pro plan has unlimited emails (fair use) and SMS from $0.007
- AI tools for forms, product recommendations and send times
- 335+ integrations: Shopify, WooCommerce, BigCommerce, Wix and more
👎 Cons
- Best prices require paying 3 months upfront
- SMS is only included on the Pro plan
Klaviyo
Data-driven email and SMS platform used by many fast-growing brands
- Price
- Free plan; paid from $20/mo (500 profiles)
- Free plan
- Yes
- Best for
- Growing stores that want advanced segmentation and analytics
Klaviyo is the choice of many fast-growing brands thanks to deep data, segmentation and flows. The free plan covers 250 active profiles and 500 emails a month; paid plans start at $20/month for 500 profiles. Costs rise faster than Omnisend as your list grows.
👍 Pros
- Free plan: 250 active profiles and 500 emails a month
- Strong segmentation, flows and A/B testing on paid plans
- AI Composer and Customer Agent (limited free allowance, add-ons on paid plans)
- 400+ integrations including Shopify and WooCommerce
👎 Cons
- Costs rise quickly as your contact list grows
- SMS and AI features are add-ons on paid plans
Frequently asked questions
What is the best free email marketing tool for Shopify?
Shopify Messaging gives you the first 10,000 emails each month free, with automations like abandoned-cart emails. Omnisend and Klaviyo also have free plans, each for 250 contacts and 500 emails a month. Prices checked November 15, 2026.
Omnisend or Klaviyo?
For most small and mid-size stores Omnisend is cheaper for the same list size and includes SMS on its Pro plan. Klaviyo is stronger on advanced segmentation and analytics, which matters more as you grow.
Which emails should an online store send first?
Start with three automations: a welcome series for new subscribers, abandoned-cart reminders, and a post-purchase follow-up asking for a review. They run on their own and usually bring the most revenue per email.
How can AI help with email marketing?
All three tools offer AI help: writing subject lines and copy, recommending products to each customer, and choosing the best send time. Always review AI-written emails for tone and accuracy before sending.