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Juan Diego Isaza A.
Juan Diego Isaza A.

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MailerLite vs Mailchimp: Email Marketing Tradeoffs

#emailmarketing #saas #marketingautomation #growth

Picking an email platform shouldn’t feel like choosing a database: irreversible and expensive. Yet mailerlite vs mailchimp is exactly that kind of decision once your list grows, automations sprawl, and pricing tiers start biting.

1) Pricing and value: the real breaking point

MailerLite generally wins on price-per-subscriber, especially for creators and small SaaS teams who want decent automation without paying “brand tax.” Mailchimp’s entry tiers look fine until you hit feature gates (advanced segmentation, reporting depth, multi-step automations).

My take: if you’re optimizing for predictable costs, MailerLite is easier to live with. Mailchimp is easier to justify when you need its ecosystem and you’re already embedded in it.

What to sanity-check before migrating:

  • Your current list size + growth rate (6–12 months).
  • How many audiences/lists you use (Mailchimp’s model can surprise you).
  • Automation count and complexity (number of branches, triggers, goals).
  • Revenue attribution needs (ecomm teams often care more here).

If you’re comparing beyond these two: Brevo often undercuts both on price when SMS is in the mix, while ActiveCampaign can cost more but brings stronger automation depth.

2) Deliverability: less about the logo, more about your habits

People argue deliverability like it’s a vendor superpower. In reality, most teams tank deliverability through:

  • importing cold lists
  • inconsistent sending
  • weak domain authentication
  • sloppy segmentation

Both MailerLite and Mailchimp support the fundamentals (SPF/DKIM, suppression lists, bounce handling). Your outcomes will depend more on how you run your program than which UI you prefer.

Opinionated advice:

  • If you send newsletters + a couple onboarding sequences, either tool is fine.
  • If you run aggressive behavioral flows (browse abandonment, lead scoring-like triggers), you’ll feel Mailchimp’s limitations sooner; this is where ActiveCampaign or GetResponse can be more “automation-first.”

3) Automations and segmentation: where differences show up fast

MailerLite’s automation builder is clean and friendly—great for linear onboarding, simple drip campaigns, and basic branching. Mailchimp can do automation, but its UX and feature availability varies by tier, and advanced segmentation can feel bolted on.

A practical way to compare is to list your real flows and see which tool makes them boring to maintain.

Typical flows to test in both:

  • Welcome series (3–5 emails)
  • Trial onboarding (event-triggered)
  • Re-engagement (based on last open/click)
  • Content interests (tag/segment based)

Actionable example: segment “engaged users” (export-based)

If you’re migrating or auditing performance, you often need a quick “engaged in last 30 days” segment. Even if your ESP can do it, exporting events and calculating it yourself helps validate numbers.

Here’s a minimal Python snippet that reads a CSV export containing email and last_open_at and outputs an engaged list.

import csv
from datetime import datetime, timedelta, timezone

cutoff = datetime.now(timezone.utc) - timedelta(days=30)

with open("subscribers.csv", newline="", encoding="utf-8") as f:
    reader = csv.DictReader(f)
    engaged = []
    for row in reader:
        last_open = row.get("last_open_at")
        if not last_open:
            continue
        # Expecting ISO-8601 like: 2026-04-01T10:12:00Z
        dt = datetime.fromisoformat(last_open.replace("Z", "+00:00"))
        if dt >= cutoff:
            engaged.append(row["email"].strip().lower())

with open("engaged_last_30d.txt", "w", encoding="utf-8") as out:
    out.write("\n".join(sorted(set(engaged))))

print(f"Engaged users: {len(set(engaged))}")
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Use that output to:

  • create a target segment in MailerLite/Mailchimp
  • exclude unengaged addresses from broadcast sends
  • compare engagement rates before and after a migration

4) Templates, editor UX, and integrations: the daily friction test

This is where subjective preferences matter, because you’ll touch the editor constantly.

MailerLite:

  • Cleaner, less cluttered UI
  • Good landing pages and forms for the price
  • Usually faster to get “good enough” emails out the door

Mailchimp:

  • Mature template ecosystem
  • Tons of native integrations (especially in ecommerce)
  • Better fit if you rely on specific third-party tools that “just work” with Mailchimp

If you’re building a creator stack, ConvertKit is worth mentioning: its editor and tagging model can be a smoother match for text-heavy newsletters and simple monetization flows. If you’re running multi-channel (email + SMS + WhatsApp), Brevo can be the more pragmatic hub.

5) So which should you choose? A practical decision matrix

If you want the blunt version:

  • Choose MailerLite if you care about cost control, straightforward automations, and a UI that doesn’t fight you.
  • Choose Mailchimp if you’re already integrated into its ecosystem (ecommerce, agencies, legacy workflows) and can justify paying for convenience.

Migration caution (non-negotiables):

  • Recreate forms and double-check consent fields
  • Warm up your sending (don’t blast your full list day one)
  • Verify SPF/DKIM/DMARC on your sending domain
  • Map tags/segments before importing

Soft close: if you’re on the fence, test your two most important flows (welcome + re-engagement) in both tools with a small segment first. The platform that makes those flows easiest to maintain is usually the right one—more than any feature checklist.

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