Kit vs MailerLite: Which Email Platform Is Right for Your Business?

The short answer: this is the one email comparison with a clean crossover point. Kit wins if you’re not paying yet — its free plan covers 10,000 subscribers with unlimited broadcasts, the most generous free tier in the category. MailerLite wins once you are paying — it’s roughly half the price at every paid tier ($49 vs $89/month at 5,000 subscribers). And there’s a second, more important split: Kit is built for people who sell through email (digital products, paid newsletters, courses), while MailerLite is built for people who send email (broadcasts, automations, beautiful campaigns). Pick by your business model, not the sticker price.

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The mechanism that decides this: the inverted cost curve

Most head-to-heads are simple — one vendor is cheaper everywhere, and features do the deciding. Kit and MailerLite are the rare pair where the cost curve inverts:

• Kit is the cheapest way to have a big free list, and the most expensive way to have a paid one. The free Newsletter plan holds 10,000 subscribers — forty times MailerLite’s free plan. But paid Creator starts at $39/month for 1,000 subscribers, exactly double MailerLite’s $19/month Comfort tier, and the gap never closes. After September 2025’s price increase (entry cost more than doubled from $15 to $33–39/month), Kit’s paid tiers are premium pricing.
• MailerLite is the cheapest way to run automation, and a poor way to stay free. Its Comfort plan at 2,500 subscribers costs $33/month with full automation; Kit needs $59/month for the same. But MailerLite’s free plan ends at 250 subscribers — a broadcaster who outgrows it starts paying immediately.

Both bill on the same axis — subscriber count — and both count only unique active subscribers. Kit states it explicitly (“subscribers are only counted if they are unique and active”), and MailerLite bills only active subscribers too, so neither vendor has a dead-contact tax hidden in the counting.

So the cost question reduces to two numbers you already know: your list size, and whether you need real automation. If you don’t pay and don’t automate, Kit is free until 10,000. The moment sequences matter, MailerLite is the cheaper platform at every size.

Pricing head-to-head (researched 2026-10-18)

Monthly billing, USD, per-subscriber tiers. Kit figures from kit.com/pricing, cross-checked against current third-party pricing breakdowns (all agree to the dollar). MailerLite figures from our own MailerLite pricing research. Annual billing saves ≈15% on Kit, 10% on MailerLite.

What the table doesn’t show, but decides real bills:

• Kit’s free plan has a hard ceiling. Above 10,000 subscribers you’re forced onto Creator, and the free plan only allows one basic visual automation — no sequences, no A/B testing, Kit branding stays on, one user seat. A serious newsletter hits the automation wall long before the subscriber wall.
• MailerLite’s Comfort plan has a send cap. Comfort caps monthly sends at 10× your subscriber tier (the 2,500 tier allows 25,000 sends). Frequent senders price Power ($49 at that tier) for unlimited sends, not Comfort.
• The jump that matters isn’t free→paid; it’s free→automated. On Kit, turning on a second automation moves you from $0 to $39/month overnight. On MailerLite, automation is included from the free plan up — the cost curve is smooth, not a cliff.

Three worked examples: your list, your money

Example 1 — a creator’s weekly newsletter, 800 subscribers, no sequences.

• Kit: inside the free plan. Unlimited broadcasts. $0/month.
• MailerLite: 800 subscribers exceeds the free plan, so Comfort. $19/month.

Kit wins by $19/month, or $228 a year. This is Kit’s home turf: the broadcast-only list that would pay to exist anywhere else.

Example 2 — a service business, 4,000 subscribers, welcome sequence + abandoned-cart flows.

• Kit: the second automation kills the free plan → Creator at 5,000 tier. $89/month.
• MailerLite: Comfort at 5,000 tier, full automation included. $49/month.

MailerLite wins by $40/month. This is the moment most Kit users discover the cliff: the automation you need costs $89/month here and $49/month there.

Example 3 — a coach with 6,000 subscribers selling a $99 course, ≈$10,000 in annual course revenue.

• Kit Creator: $89/month ($1,068/year) + digital-product fees of 3.5% + 30c per sale — about $350 on $10,000 of revenue.
• MailerLite Comfort: $49/month ($588/year) + Stripe processing on sales (≈2.9% + 30c — about $320) if you sell through MailerLite’s Stripe integration.

Roughly a wash on money: ≈$1,418/year for Kit versus ≈$908/year for MailerLite. The decider isn’t price — it’s whether the course business lives or dies on automation and recommendation features. A coach whose revenue depends on segmentation, referral systems, and the Creator Network’s list growth gets Kit’s margin back. One who just needs checkout links in emails keeps the $500.

Features head-to-head

Bold takeaways from that table:

• Kit’s real product is monetization, not email. Nobody picks Kit for its templates. They pick it because selling a course, running a paid newsletter, or growing through the Creator Network’s recommendations is native functionality — the email tool and the storefront are one account. MailerLite can do each of those, but through integrations that feel bolted on.
• MailerLite’s real product is the email itself. A better editor, better templates, a website builder, and the simplest serious automation in the category — for the business whose email is marketing rather than the business model, that’s the whole job.
• Kit’s tag system is a philosophy difference, not a feature gap. MailerLite organizes subscribers into lists; Kit tags every subscriber by interest, entry point, and action, so one person can belong to three overlapping audiences from a single list. For a creator selling three different products to one audience, that’s the cleanest segmentation in the category. For a local business with one newsletter, it’s complexity without payoff.
• The refund policy tells you who sells to whom. Kit offers 30 days no-questions-asked because creators churn when revenue doesn’t come. MailerLite generally doesn’t refund because its pricing is already the moat. Try either on a monthly plan before committing to annual.

Deliverability: the honest answer

Both platforms run reputable shared infrastructure, and at this level your own setup dominates the outcome: SPF, DKIM, and DMARC authentication on your domain, an opt-in list, and real engagement matter far more than the vendor. MailerLite has one structural advantage worth noting: its stricter approval process (domain authentication before you can send) keeps spammers off the shared IPs your emails ride on — a mild annoyance on day one that’s a deliverability feature from day two. We covered the full mechanism in our email deliverability guide.

The verdict: best for each business type

Pick Kit if:

• Your newsletter is a business asset, not a marketing channel — you sell products, courses, paid subscriptions, or sponsorships through it.
• You want the biggest free runway in the category (10,000 subscribers at $0) while you grow.
• You segment one audience across multiple offers and want tagging instead of lists.
• You want list growth through the Creator Network’s recommendations, paid recommendations, and a referral system.
• Typical fit: creators, coaches, authors, course sellers, newsletter entrepreneurs.

Pick MailerLite if:

• You want the cheapest serious email marketing at every paid tier — roughly half Kit’s price from 1,000 subscribers up.
• You need automation on a budget: MailerLite includes it from the free plan up, with no $39/month cliff.
• You care how your emails look: the drag-and-drop editor and templates are the better design tool.
• You’re a general small business whose email is a channel — newsletters, promotions, announcements — not the product.
• Typical fit: local businesses, service businesses, small e-commerce stores, freelancers.

Before you decide, run these three checks: (1) on Kit, count your automations — one basic visual automation is all the free plan allows, so a welcome sequence plus anything else means Creator; (2) on MailerLite, check your monthly send volume against Comfort’s 10× tier cap — frequent senders price Power, not Comfort; (3) on either, project 12 months of list growth: Kit’s tiers climb fast after 10,000 subscribers ($139/month), so a fast-growing list is cheaper on MailerLite long before it looks expensive today.

For the full picture of what email marketing software costs across all vendors — including the free-tier traps and pricing-model patterns behind this comparison — see our email marketing software cost guide. And if you’re still choosing your platform, our how to choose email marketing software guide walks through the decision step by step.

Prices checked 2026-10-18 from Kit’s official pricing page, with Kit tier pricing cross-checked against current third-party pricing breakdowns (they agree to the dollar at every band), and MailerLite pricing from our 2026-10-10 vendor research. Kit rebranded from ConvertKit in October 2024 and raised paid prices in September 2025 — older reviews may show lower figures. Both vendors change plans periodically; verify your exact tier on the vendor’s pricing page before committing.