The Pricing Model That Punishes Growth
Mailchimp charges by the number of contacts in your account. Not active contacts. Not contacts you actually email. Total contacts. So the customer who bought once in 2019 and never opened another email? You're paying to store them.
At 10,000 contacts, Mailchimp Standard runs $100/month. At 25,000, it's about $230/month. At 50,000 contacts, you're looking at roughly $350/month. And that's Standard — not their Premium tier.
For an e-commerce store doing $30K–$50K/month, spending $3,000–$4,000 annually on email marketing feels absurd when the tool is essentially sending abandoned cart sequences and weekly promos. The math doesn't work, and Mailchimp knows it. They bet on switching costs keeping you around.
Brevo: Pay for Sends, Not Subscribers
Brevo (formerly Sendinblue) flips the model entirely. You pay based on how many emails you send per month, regardless of how many contacts sit in your database. Their Starter plan is $25/month for 20,000 emails. Their Business plan is $65/month for 20,000 emails with marketing automation, A/B testing, and advanced stats.
For a store with 40,000 contacts that emails its list twice a week (roughly 320,000 emails/month), Brevo Business costs about $169/month. On Mailchimp, that same list would run $300+ before you even count overages.
The automation builder is solid but not spectacular. If you're coming from Klaviyo's pre-built flows, you'll need to rebuild everything manually. Brevo has templates, but the e-commerce-specific ones lag behind dedicated Shopify tools.
Who should NOT use Brevo
Shopify stores that rely heavily on pre-built product recommendation blocks and predictive analytics. Brevo's e-commerce integrations work, but they require more manual setup than Klaviyo. If your competitive advantage is hyper-personalized product emails, the migration cost in time and lost sophistication is real.
ActiveCampaign: Automation Powerhouse, Steep Scaling
ActiveCampaign starts at $29/month for 1,000 contacts. That sounds reasonable until you see the curve: 10,000 contacts jumps to $174/month on the Plus plan. At 50,000, you're approaching $500/month.
So why does anyone use it? Because the automation engine is genuinely excellent. Conditional branching, lead scoring, site tracking, CRM integration, goal-based automations — ActiveCampaign lets you build sequences that would take three Zapier integrations and a custom webhook on other platforms.
If your e-commerce operation depends on complex post-purchase flows (upsells based on purchase history, win-back campaigns triggered by engagement scoring, VIP segmentation based on lifetime value), ActiveCampaign earns its price. For everyone else, it's overkill that costs more than Mailchimp by the time you hit 25K contacts.
Klaviyo: The Shopify Default Tax
Klaviyo is what Shopify recommends. It's deeply integrated, has pre-built flows for every e-commerce scenario, and the product recommendation engine is legitimately good. At $20/month for up to 500 contacts, it seems affordable.
Then your store grows. At 10,000 contacts: $150/month. At 30,000: $450/month. At 50,000: $720/month. Those are real numbers from their pricing page, and they don't include SMS credits.
Here's the honest assessment: Klaviyo is the best tool for Shopify-native e-commerce email marketing. The flows, the analytics, the product feed integration — nothing else matches it feature-for-feature. But you pay a premium for that polish, and the premium gets brutal at scale.
The Klaviyo decision matrix
If email revenue exceeds 30% of your store's total revenue, Klaviyo probably pays for itself through better segmentation and flows. If email is under 15% of revenue, you're paying for capabilities you're not extracting value from. Switch to Brevo and pocket the difference.
Real Cost Comparison
| Contacts | Mailchimp Std | Brevo Biz | Klaviyo | ActiveCampaign Plus |
|---|---|---|---|---|
| 5,000 | $75/mo | $25/mo* | $100/mo | $99/mo |
| 10,000 | $100/mo | $25/mo* | $150/mo | $174/mo |
| 25,000 | $230/mo | $65/mo* | $375/mo | $286/mo |
| 50,000 | $350/mo | $169/mo* | $720/mo | ~$500/mo |
*Brevo pricing based on email volume (Business plan, 20K–150K emails/mo), not contact count. Assumes 2 sends per week to full list. Prices approximate; check each provider for current rates.
The Decision Framework
Multiply three numbers: your list size, your weekly send frequency, and your automation complexity (rate it 1–3). The result tells you where to look.
- •Large list + low frequency + simple automations: Brevo wins outright. You're paying for storage on every other platform.
- •Any size + high frequency + complex automations: ActiveCampaign if you need the CRM; Klaviyo if you're on Shopify.
- •Under 5K contacts + any complexity: Honestly, Mailchimp is fine. The pricing only gets painful at scale.
Migration Checklist: What You Lose Leaving Mailchimp
Switching email platforms is a bigger project than most founders expect. Before you migrate, understand what transfers and what doesn't.
Transfers cleanly
Contact lists (CSV export), basic segments, email templates (with reformatting), historical campaign data (as reports/exports).
Requires rebuilding
Automations and flows (every platform structures these differently), signup forms and landing pages, integrations with your store/CRM, A/B test history and optimization data.
Lost permanently
Engagement scoring history, send-time optimization data, Mailchimp-specific analytics (click maps, comparative reports), any Mailchimp-hosted landing pages (URLs will break).
Common Mistakes
- 1.Migrating without cleaning your list first. If you're leaving Mailchimp because of list size pricing, export your list, remove anyone who hasn't opened in 6+ months, then import to the new platform. Start clean.
- 2.Switching mid-campaign season. Migrate during a slow period. Your deliverability on a new platform needs time to warm up. Switching the week before Black Friday is how you tank your Q4 revenue.
- 3.Ignoring deliverability warm-up. New sending domains need to build reputation. Start by sending to your most engaged segment (openers from the last 30 days), then gradually expand over 2–3 weeks.
- 4.Choosing based on current list size only. Project where you'll be in 12 months. A platform that's cheaper today might be more expensive at 3x your current contacts.
Bottom Line
Mailchimp built its pricing model for newsletters and small businesses. E-commerce stores outgrow that model fast. If your monthly email bill exceeds $150 and you aren't using advanced automations that justify the cost, switch to Brevo and save 50–70%. If you need Shopify-native intelligence and your email channel drives serious revenue, Klaviyo is worth the premium. ActiveCampaign fits the gap between those two — powerful automations without the Shopify-specific lock-in. There's no universal right answer, but there is almost certainly a cheaper one than what you're paying now.
Frequently Asked Questions
What is the best Mailchimp alternative for e-commerce?
For most e-commerce stores, Brevo (formerly Sendinblue) is the best Mailchimp alternative because it charges by emails sent rather than list size. Klaviyo is better for Shopify-native stores that need deep product analytics and purchase-triggered automations.
Why is Mailchimp so expensive for e-commerce stores?
Mailchimp charges based on your total contact list size, including inactive subscribers. E-commerce stores often have large lists from one-time buyers, which inflates costs significantly. Platforms like Brevo avoid this by charging per email sent instead.
Is Klaviyo worth the higher price for Shopify stores?
Klaviyo is worth it if your email channel generates measurable revenue and you rely on purchase-triggered flows, product recommendations, and attribution reporting. For stores spending under $200/month on email, Brevo or ActiveCampaign deliver similar results at lower cost.
How do I migrate from Mailchimp to Brevo without losing subscribers?
Export your Mailchimp audience as a CSV, clean inactive contacts (6+ months without opening), then import into Brevo. Re-authenticate your sending domain with SPF/DKIM records. The migration typically takes under an hour for lists up to 50,000 contacts.