Boostmail vs Klaviyo
Boostmail and Klaviyo charge for email in different ways. Klaviyo, rated 4.7★ across 3,332 Shopify reviews, bills by contacts and does a lot: email and SMS, a visual flow builder, and deep predictive analytics. Boostmail never charges per contact. You pay only for the emails you send, and the first 20,000 every 30 days are free. A list of 10,000 contacts receiving 4 emails each per 30 days costs $15 on Boostmail, where Klaviyo's plan for 10,000 contacts is roughly $150/mo, with SMS billed separately.
That trade is the whole story of this comparison. Boostmail wins on price model and simplicity: keep every subscriber, pay only for what you send, with two-way Shopify customer and consent sync, abandoned cart reminders with revenue attribution, and coupons captured in BoostPop (our separate popup app) feeding straight into Boostmail. Klaviyo wins on breadth: SMS, multi-step automation flows, predicted lifetime value, churn scoring, and a large integration catalog. Boostmail has none of those, and we say so below. Every Klaviyo figure on this page 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 own list, then read the honest feature breakdown to decide which fits your store.
What you would pay for your list
Enter your contact count and how many emails each contact gets per 30 days to compare Boostmail's pay-per-send price against Klaviyo's contact-based plans. Boostmail's price comes from its published per-email rates; Klaviyo's is drawn from its listing as of the date shown. Klaviyo's figures are for email only, and SMS is billed on top if you also send texts.
That is 40,000 emails every 30 days.
Boostmail
$15/mo
Klaviyo
$150/mo
Boostmail is $135/mo cheaper for 10,000 contacts at 4 emails each.
Klaviyo pricing as of 2026-09-30. Source: Klaviyo Shopify App Store listing. Klaviyo prices by contacts. Boostmail charges only for emails sent: the first 20,000 every 30 days are free, and there is no charge per contact.
Prefer a full-screen tool? Use the Klaviyo vs Boostmail cost calculator.
Boostmail vs Klaviyo at a glance
Feature coverage, example cost at three list sizes (each contact receiving 4 emails per 30 days), 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 | Pay per email sent, no charge per contact: the first 20,000 emails every 30 days are free, then from $0.50 per 1,000 | Usage-based (scales with contacts) |
| 1,000 contacts, 4 emails each | Free | $30, $720/mo (as of 2026-09-30, per Shopify App Store listing ) |
| 10,000 contacts, 4 emails each | $15/mo | $30, $720/mo (as of 2026-09-30, per Shopify App Store listing ) |
| 25,000 contacts, 4 emails each | $45/mo | $30, $720/mo (as of 2026-09-30, per Shopify App Store listing ) |
| Email campaigns | Yes | Yes |
| SMS marketing | No | Yes |
| Automations | Partial | Yes |
| Abandoned cart | Yes | Yes |
| AI content | No | Partial |
| Segmentation | Yes | Yes |
| Popups & forms | No | Yes |
| Deliverability tools | Yes | Yes |
| App Store rating | 4.7 / 5 | 4.7 / 5 |
Pricing: pay per send vs pay per contact
The two apps price on different units. Boostmail charges for emails sent: the first 20,000 every 30 days are free, then you pay per 1,000 emails, and there is no charge per contact. Klaviyo charges by total contacts, which can include profiles you are not actively emailing, and bills SMS separately. That is why the gap widens as your list grows, and why you never need to prune a Boostmail list to keep your bill down.
Boostmail, pay per send
The first 20,000 emails every 30 days are free, with no charge per contact. The example lists below assume each contact receives 4 emails per 30 days.
- 1,000 contacts (4,000 emails) $0
- 5,000 contacts (20,000 emails) $0
- 10,000 contacts (40,000 emails) $15
- 25,000 contacts (100,000 emails) $45
- 50,000 contacts (200,000 emails) $95
- 100,000 contacts (400,000 emails) $210
Prices are per 30-day billing period. Sending more or less often changes the price; list size alone does not. See full pricing for the per-1,000 rates.
Klaviyo, contact-based tiers
Scales with total contacts; SMS is billed separately. Figures as of 2026-09-30, per Klaviyo's listing.
- Free Free
Up to 250 active profiles / 500 emails per month
- Email 1k $30/mo
Up to 1,000 contacts (10,000 emails/mo); price scales with contact count
- Email 10k $150/mo
Up to 10,000 contacts (100,000 emails/mo); SMS billed separately
- Email 50k $720/mo
Up to 50,000 contacts (500,000 emails/mo)
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 email marketing: campaigns built in a drag-and-drop editor, segmentation, welcome and abandoned cart emails, and authenticated sending. Beyond that core, Klaviyo does much more, including SMS, multi-step automation flows, and predictive analytics. Boostmail's case rests on its price model and a simple, tight Shopify fit.
What both do well
- Email campaigns with a drag-and-drop editor
- Welcome and abandoned cart emails
- Segmentation by engagement, purchase history, tags and location
- Sending-domain authentication (SPF, DKIM, DMARC) and bounce handling (details)
Why merchants pick Boostmail
- No per-contact charge, you pay only for emails sent, and the first 20,000 every 30 days are free
- Simple triggered campaigns, welcome, abandoned cart (up to 3 reminders per cart, with orders attributed back to the campaign) and coupon reminder, instead of a flow builder to learn
- Tight Shopify fit, customers and email consent sync both ways, and coupons captured in BoostPop feed straight in
Where Klaviyo leads (the honest gap)
- SMS, Klaviyo sends texts alongside email; Boostmail is email only
- Automation flows, a visual builder for multi-step flows such as post-purchase, browse abandonment and win-back
- Predictive analytics, predicted lifetime value, churn risk, predicted next-order date
- Ecosystem depth, a large catalog of pre-built integrations and a more mature reporting suite
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 4.7★ from 3,332 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, reliability starts with the basics done properly: you send from your own authenticated domain (SPF, DKIM, DMARC), bounces and complaints are handled and suppressed automatically, and every subscriber gets one-click unsubscribe. 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 to keep every subscriber and pay only for the emails you send, not for the size of your list.
- Your core needs are campaigns, a welcome email and abandoned cart reminders, and you would rather not build and maintain multi-step flows.
- You want Shopify customers and email consent kept in sync both ways, and you use (or plan to use) BoostPop to capture coupons and subscribers.
- You market by email only and do not need SMS, AI copywriting or predictive analytics.
Choose Klaviyo if…
- You want SMS and email in one tool, or a visual flow builder for post-purchase, browse abandonment and win-back sequences.
- 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 with 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?
- For most lists, yes, because the two apps charge for different things. Boostmail never charges per contact: the first 20,000 emails every 30 days are free, then you pay per 1,000 emails sent. A list of 10,000 contacts receiving 4 emails each per 30 days costs $15 on Boostmail, and 50,000 contacts cost $95. 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. Your Boostmail cost rises with how often you send, so use the calculator on this page with your own numbers.
- Does Boostmail have AI content generation like Klaviyo?
- No. Boostmail has no AI writing or AI subject line features. You write your own campaigns in the drag-and-drop editor, starting from a preset template (New Arrivals, Black Friday, Flash Sale and others) if you like. Klaviyo's listing includes some AI assistance, so if AI-generated copy matters to you, that is a point for Klaviyo.
- What does Klaviyo do better than Boostmail?
- Quite a lot, and it is worth being plain about it. Klaviyo offers SMS, a visual flow builder for multi-step automations, predictive analytics (predicted lifetime value, churn risk, predicted next order date), a larger pre-built integration ecosystem, and a more mature reporting suite. Boostmail has none of those. It focuses on pay-per-send pricing with no per-contact charge, two-way Shopify customer and consent sync, and three triggered campaigns: welcome, abandoned cart (with revenue attribution) and coupon reminder.
- Does Boostmail send SMS?
- No. Boostmail is email only. Klaviyo offers SMS alongside email, billed separately from its email plan. If SMS is part of how you market, Klaviyo covers it and Boostmail does not.
- How hard is it to switch from Klaviyo to Boostmail?
- For most stores it is a short job. Boostmail syncs your Shopify customers and their email marketing consent in both directions, and you can import any other subscribers from a CSV. Then set up your welcome and abandoned cart campaigns and authenticate your sending domain with SPF, DKIM, and DMARC. Multi-step Klaviyo flows such as post-purchase or win-back have no direct equivalent in Boostmail, so check which ones you rely on before you move. Boostmail installs free from the Shopify App Store, so you can set it up in parallel and cut over when you are ready.
Trusted by growing Shopify stores, free to install, no credit card.
See what Boostmail costs for your list
Keep every subscriber. Pay only for what you send, with the first 20,000 emails every 30 days free. Install free from the Shopify App Store, no credit card needed.
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.