The Best Free Email Marketing Options (And When You'll Outgrow Them)

Free email marketing is real, but 2026 was a rough year for it. Mailchimp halved its free plan in February. MailerLite gutted its own in June. The gap between the generous free tiers and the token ones is now enormous — and picking the wrong one means migrating your list six weeks after you started.

Here's the short version: Kit's free plan (10,000 subscribers) and Brevo's free plan (unlimited contacts, 300 emails/day) are the only two that can carry a real audience. Everything else is a functional demo. Below is what each free tier actually includes as of July 2026, the specific wall you'll hit, and what it costs to climb over it.

The short answer: which free tier to pick

If you're picking a platform for the long haul rather than the next 90 days, the free tier shouldn't be your deciding factor at all. Read our breakdown of the best email tools for newsletter operators crossing 10K subscribers instead — that's where the real cost differences show up.

Kit's free plan is the most generous by a mile

Kit (formerly ConvertKit) gives away 10,000 subscribers and unlimited email sends on its Newsletter plan. No trial clock, no expiry. You also get unlimited landing pages and forms, plus the ability to sell digital products through Kit Commerce — a feature most competitors lock behind a paid tier.

The catch is automation. The free plan includes one email sequence and one automation rule. That's enough for a welcome email. It is not enough for a segmented onboarding flow, a re-engagement campaign, or anything triggered by subscriber behavior. Native integrations with Shopify, Teachable, and similar tools also require the Creator plan, though Zapier still works as a workaround.

Every email carries Kit branding until you upgrade. Creator starts at $39/month for 1,000 subscribers, which is not cheap — you're paying for the automation builder, not the capacity.

Outgrow it when: you need more than one automated sequence, or the branding starts costing you credibility with sponsors.

Brevo: unlimited contacts, but a daily ceiling

Brevo flips the usual model. Instead of capping your list, it caps your sending: unlimited contacts, 300 emails per day. That's roughly 9,000 emails a month if you send every single day, which most people don't.

For a 2,000-person list you email twice a month, that math doesn't work — one send blows through six days of allowance, and unused daily credits don't roll over. For a 250-person list you email weekly, it's plenty. Brevo also throws in a genuine CRM, transactional email, and SMS/WhatsApp campaigns on the free tier, which is unusual.

Outgrow it when: a single campaign exceeds 300 recipients. At that point the Starter plan (around $9/month for 5,000 emails) removes the daily cap entirely, and it's one of the cheaper upgrades in the email marketing category.

HubSpot free: email is the hook for the CRM

HubSpot's free tools include 2,000 marketing emails per month, plus contact management, forms, landing pages, live chat, deal tracking, and meeting scheduling. As a package, nothing else on this list comes close.

The 2,000-email ceiling is the constraint everyone hits first, and it counts per recipient — one campaign to 1,000 contacts burns half your month. You also can't A/B test, use smart content, send by time zone, or cap send frequency. Emails carry HubSpot branding, and you're limited to two users.

HubSpot free is best understood as a CRM that happens to send email. If you want the CRM anyway, the email allowance is free upside. If you only want email, you're accepting a low ceiling for tools you won't use. Our guide to marketing automation for tiny teams covers when that trade makes sense.

Outgrow it when: you send more than two campaigns a month, or you need A/B testing to justify your subject lines.

AWeber and GetResponse: the 500-subscriber middle ground

AWeber's free plan gives you 500 subscribers and 3,000 emails per month — enough for a weekly send to a full 500-person list with room to spare. You get one list, one landing page, basic templates, and AWeber branding. No split testing, no behavioral automation.

GetResponse's free plan allows 500 contacts and 2,500 newsletters per month. It's more restrictive on features: no autoresponders, no automation workflows, no A/B testing, and landing pages are capped at 1,000 unique visitors monthly. Every message carries a GetResponse badge.

Both are honest starter tiers. Neither is a place to build a business. AWeber's send allowance is the more useful of the two if you actually email your list regularly.

Outgrow it when: you cross 500 subscribers, which happens faster than you think if any single piece of content lands.

Mailchimp and Klaviyo: free is a demo now

Mailchimp's free plan is 250 contacts and 500 sends per month, with a 250/day cap. That's down from 500 contacts and 1,000 sends — the cut took effect February 17, 2026. Support is email-only, and only for your first 30 days.

At 250 contacts and 500 sends, you get exactly two campaigns to a full list per month. Mailchimp's free tier is now a product tour, not a plan.

Klaviyo's free plan sits at the same 250 profiles / 500 email sends per month, plus 150 SMS credits. The difference is that Klaviyo doesn't cripple the features — you get the real automation flows and pre-built templates, which makes it a genuinely useful way to evaluate the platform before an ecommerce migration. It's just not a plan you operate on.

Outgrow it when: immediately, unless you're evaluating. Both cross into paid around $20/month at 500 contacts.

Free tiers shrank in 2026 — plan for it

Two things happened this year that should change how you think about "free forever":

• Mailchimp halved its free plan in February 2026 (500 → 250 contacts, 1,000 → 500 sends).
• MailerLite cut its free plan on June 16, 2026, from 500 subscribers and 12,000 monthly emails down to 250 subscribers and 2,500 emails. Feature-level limits follow on August 13, 2026. There's no grandfathering — existing accounts are affected too.

MailerLite was, until recently, the best free plan on the market. It isn't anymore. That's the lesson: a free tier is a marketing decision, not a contract, and it can be revised while your list sits inside it.

Build on a platform whose paid plan you'd be happy to pay for. Free is a runway, not a destination. The same pattern plays out in other categories — see free accounting software and when you'll outgrow it for a near-identical story.

The open-source route: cheap, not free

If you're technical, self-hosted tools like Listmonk and Mautic remove per-subscriber pricing entirely. You install them on a server and connect your own sending infrastructure — usually Amazon SES, Postmark, or similar.

The real cost looks like this: a small VPS runs roughly $5–10/month, and SES-style transactional pricing is a fraction of a cent per email. Sending 100,000 emails a month can land well under $20 — a fraction of what any hosted platform charges at that volume.

What you're paying instead is time. You own deliverability, DNS records, SPF/DKIM/DMARC setup, bounce handling, list hygiene, and IP warming. Get any of those wrong and your emails land in spam with no support team to call. It's a good trade for developers with an existing server, and a bad one for everyone else.

Five signs you've outgrown the free plan

1. You're rationing sends. If you're deciding not to email your list because of a quota, the tool is costing you more than it saves.
2. You need a second automation. Welcome sequence plus anything else means paid on nearly every platform here.
3. The branding is a credibility problem. Sponsors, clients, and paying customers notice the footer.
4. You're segmenting manually. Exporting CSVs to build a segment is a paid feature you're performing by hand.
5. You can't tell what's working. No A/B testing means you're guessing at subject lines forever.

The upgrade math is usually favorable. Brevo's paid entry is around $9/month, Mailchimp Essentials and Klaviyo's Email plan both start near $13–20/month at 500 contacts, and AWeber Lite runs $12.50/month. If email drives any revenue at all, those numbers clear the bar quickly.

For teams sending lifecycle campaigns rather than broadcasts, the calculus is different — see the best email tools for SaaS lifecycle drips. And if you're doing outbound rather than newsletters, free marketing tiers are the wrong tool entirely; start with cold email tools for B2B founders.

Frequently Asked Questions

What is the best free email marketing tool in 2026?

Kit (ConvertKit) has the most generous free plan at 10,000 subscribers with unlimited sends. If you email frequently to a smaller list, Brevo's free plan — unlimited contacts, 300 emails per day — is the better fit. Both are genuinely usable rather than trial-shaped.

Is Mailchimp still free?

Yes, but barely. Mailchimp's free plan dropped to 250 contacts and 500 monthly sends effective February 17, 2026, with a 250-per-day cap. It's enough to evaluate the product, not enough to run a list on.

How many subscribers can I have before I have to pay?

It depends entirely on the platform: 250 on Mailchimp, Klaviyo, and MailerLite; 500 on AWeber and GetResponse; 10,000 on Kit; unlimited on Brevo (which caps sends instead). The subscriber number alone is misleading — check the monthly send allowance too.

Do free email marketing plans put branding on my emails?

Yes, all of them. Kit, Brevo, AWeber, GetResponse, HubSpot, Mailchimp, and Klaviyo all add a badge or footer on free tiers. Removing it is one of the most common reasons people upgrade, and it's usually included in the cheapest paid plan.

Can I switch email platforms later without losing subscribers?

Yes. Subscriber lists export as CSV from every platform here, and several offer free migration services on paid plans. What doesn't transfer cleanly is automation logic, historical engagement data, and your sending reputation — expect a temporary deliverability dip after a move. Migrate before your list gets large, not after.

Are open-source email tools actually free?

No. Listmonk and Mautic are free to license, but you pay for hosting (roughly $5–10/month for a small VPS) and per-email sending through a provider like Amazon SES. Total cost is far lower than hosted platforms at volume, but you take on deliverability and infrastructure work yourself.

Should I choose a platform based on its free tier?

No. Free tiers change — Mailchimp and MailerLite both cut theirs in 2026 with no grandfathering. Pick the platform whose paid plan you'd be willing to pay for, then use its free tier as runway. Our rundown of the email marketing features that became table stakes in 2026 is a better starting filter than price.