Boostmail vs Klaviyo
For most Shopify stores, Boostmail is the cheaper way to run email and SMS marketing, and it includes AI content generation and a deliverability focus out of the box, while Klaviyo, rated 4.6★ across 3,200 Shopify reviews, remains the more powerful choice if you need its deep predictive analytics and large integration ecosystem. The pricing wedge is the headline: Boostmail is free up to 1,000 active subscribers and $60/mo at 10,000, where Klaviyo's contact-based plans reach roughly $150/mo at the same list size, with SMS billed separately on Klaviyo.
That trade is the whole story of this comparison. Boostmail wins on transparent, subscriber-based pricing with unlimited emails on paid plans, AI copywriting included from the Free tier, and a sender-reputation and SPF/DKIM/DMARC deliverability stack. Klaviyo wins on data science, predicted lifetime value, churn scoring, and a benchmarks suite that a large data-rich store can genuinely act on. Every Klaviyo figure below is sourced from its own Shopify App Store listing and pricing page, dated, and any criticism is quoted verbatim from real merchant reviews, not asserted by us. Use the calculator to see the gap for your exact list size, then read the honest feature breakdown to decide which fits your store.
What you would pay at your list size
Enter your active-subscriber count to compare Boostmail's published subscriber pricing against Klaviyo's contact-based plans. Boostmail's price comes from its own plan tiers; Klaviyo's is drawn from its listing as of the date shown. Remember that Klaviyo bills SMS on top of these email figures, so the real-world gap is usually wider than the numbers below if you also send texts.
Boostmail
$35/mo
Klaviyo
Pricing under review
Klaviyo pricing as of 2026-06-29. Source: Klaviyo Shopify App Store listing. Boostmail pricing from its published plans.
Prefer a full-screen tool? Use the Klaviyo vs Boostmail cost calculator.
Boostmail vs Klaviyo at a glance
Feature coverage, example monthly cost at three list sizes, and App Store ratings, side by side. Cells marked "Partial" mean the capability exists but is narrower than a full "Yes"; the notes under the pricing rows cite each figure's source and date.
| Feature / Metric | Boostmail | Klaviyo |
|---|---|---|
| Pricing model | Subscriber-based, free up to 1,000 active subscribers, then tiered by list size with unlimited emails | Usage-based (scales with contacts) |
| At 1,000 subscribers | Free | pricing under review |
| At 5,000 subscribers | $35/mo | pricing under review |
| At 25,000 subscribers | $110/mo | pricing under review |
| Email campaigns | Yes | Yes |
| SMS marketing | Yes | Yes |
| Automations | Yes | Yes |
| Abandoned cart | Yes | Yes |
| AI content | Yes | Partial |
| Segmentation | Yes | Yes |
| Popups & forms | Yes | Yes |
| Deliverability tools | Yes | Yes |
| App Store rating | 4.7 / 5 | 4.6 / 5 |
Pricing: subscriber tiers vs contact tiers
The two apps price on different units. Boostmail charges by active subscribers and keeps emails unlimited on paid plans. Klaviyo charges by total contacts, which can include profiles you are not actively emailing, and meters SMS separately. That difference is why the gap widens as your list grows.
Boostmail, active-subscriber tiers
Free up to 1,000 active subscribers, then a flat monthly price per tier with unlimited emails. Counts active subscribers only.
- Up to 1,000 subscribers Free
- Up to 2,500 subscribers $20/mo
- Up to 5,000 subscribers $35/mo
- Up to 10,000 subscribers $60/mo
- Up to 25,000 subscribers $110/mo
- Up to 50,000 subscribers $190/mo
- Up to 100,000 subscribers $324/mo
Beyond 100,000 subscribers Boostmail continues on its Enterprise Plus plan (dedicated IP, custom design). See full pricing.
Klaviyo, contact-based tiers
Scales with total contacts; SMS is billed separately. Figures as of 2026-06-29, per Klaviyo's listing.
- Free Free
Up to 250 contacts / 500 email sends; Klaviyo branding
- Email 1k $30/mo
Up to 1,000 contacts; price scales with contact count
- Email 10k $150/mo
Up to 10,000 contacts; SMS billed separately
- Email 50k $720/mo
Up to 50,000 contacts
Source: Klaviyo Shopify App Store listing. Verify the live price before deciding.
Where they overlap, and where they don't
Both apps cover the core of Shopify lifecycle marketing: email campaigns, automations and abandoned-cart flows, SMS, segmentation, and popups/forms. The honest differences are at the edges, generative AI content and deliverability tooling on one side, predictive analytics and ecosystem depth on the other.
What both do well
- Email campaigns with a drag-and-drop builder
- Automations: welcome, abandoned-cart flows, post-purchase
- SMS marketing alongside email
- Segmentation and popups/forms for list growth
Where Boostmail leads
- AI content included, OpenAI-powered copy from the Free plan (20,000 AI words)
- Deliverability focus, 95% deliverability target, sender-reputation monitoring, SPF/DKIM/DMARC, bounce and complaint handling (details)
- Transparent pricing, subscriber tiers with unlimited emails, no surprise contact-count creep
Where Klaviyo leads (the honest gap)
- Predictive analytics, predicted lifetime value, churn risk, predicted next-order date
- Ecosystem depth, a large catalog of pre-built integrations and partner tools
- Mature reporting, benchmarks and a deeper data-science feature set for large, data-rich stores
Want the longer-form switcher angle instead of a head-to-head? See the Klaviyo alternative guide.
Support & reliability
Klaviyo's overall rating is strong at 4.6★ from 3,200 reviews, and most merchants are happy. But two themes recur often enough in recent reviews to weigh before you commit. These are verbatim merchant quotes from Klaviyo's own App Store reviews, not our characterization.
"The pricing gets very expensive very fast as your list grows."
"Powerful but the learning curve is steep and it is overkill for a small store."
For Boostmail's side, deliverability is the headline reliability claim: a 95% deliverability target backed by sender-reputation monitoring and authenticated sending (SPF, DKIM, DMARC). Support is handled directly by the team behind the app at the help center.
When to choose which
Neither app is the right answer for every store. Here is the honest split.
Choose Boostmail if…
- You want predictable, lower monthly cost that scales with active subscribers, not total contacts.
- You value AI-assisted copywriting included in the plan rather than as an add-on.
- Deliverability, landing in the inbox, is your top priority and you want authenticated sending handled.
- You are a growing store that does not need a full data-science suite to get value from email and SMS.
Choose Klaviyo if…
- Predictive analytics, predicted lifetime value, churn scoring, next-order timing, are central to how you segment.
- You rely on a wide catalog of pre-built integrations across your stack.
- You are a larger, data-rich store and the higher contact-based price is justified by the depth.
- You have the team capacity to absorb the steeper learning curve that some reviewers note above.
If that is you, Klaviyo is a strong, well-reviewed choice, this comparison is independent, and we say so plainly.
Frequently asked questions
- Is Boostmail cheaper than Klaviyo?
- At most list sizes, yes. Boostmail is free up to 1,000 active subscribers, then $20/mo at 2,500, $35/mo at 5,000, $60/mo at 10,000, and $110/mo at 25,000, with unlimited emails on paid plans. Klaviyo bills by total contacts: roughly $30/mo at 1,000 contacts, $150/mo at 10,000, and $720/mo at 50,000, with SMS billed separately. The exact gap depends on your list size, so use the calculator on this page for your own number.
- Does Boostmail include AI content generation like Klaviyo?
- Yes. AI content generation is included in Boostmail (OpenAI-powered subject lines, body copy, and campaign drafts), the Free plan ships with 20,000 AI words. Klaviyo offers AI assists too, but its strongest differentiator is predictive analytics and data science features rather than generative copywriting.
- What does Klaviyo do better than Boostmail?
- Klaviyo has deeper predictive analytics (predicted lifetime value, churn risk, predicted next order date), a larger pre-built integration ecosystem, and a more mature benchmarks and reporting suite. If advanced data science and a wide third-party integration catalog are core to your workflow, Klaviyo is the more established choice. Boostmail focuses on transparent pricing, included AI content, and deliverability.
- Can I send SMS with both apps?
- Yes, both Boostmail and Klaviyo support SMS marketing alongside email. With Klaviyo, SMS is typically billed separately from your email plan. Boostmail bundles email and SMS under the same subscriber-based plan structure.
- How hard is it to switch from Klaviyo to Boostmail?
- For most stores it is a short job: export your subscriber list and consent data, import it into Boostmail, recreate your active flows (welcome, abandoned cart, post-purchase), and connect your sending domain with SPF, DKIM, and DMARC for deliverability. Boostmail installs free from the Shopify App Store, so you can set it up in parallel and cut over when your flows are live.
Trusted by growing Shopify stores, free to install, no credit card.
See what Boostmail costs for your list
Free up to 1,000 active subscribers, with AI content and deliverability tooling included. Install in under a minute and run email and SMS from one app.
Boostmail is independent and not affiliated with, endorsed by, or sponsored by Klaviyo. Product names are trademarks of their respective owners, used here nominatively for comparison. Competitor pricing and features are shown as of the dates cited and may change, verify on the vendor's own listing before deciding.