Free AI Email Marketing Tools: What You Actually Get for Free
Free AI email marketing tools are, in practice, free plans that bundle AI writing, subject-line or design features with real sending limits. There is rarely a standalone free AI product for email: what you get is a capped tier — contacts, monthly sends, AI actions — inside a platform. This guide compares the options that publish those limits, explains what each is best for, and shows where the free tier stops being enough.
How we chose these tools
Four criteria, applied the same way to every product:
- A genuinely usable free tier, not a 14-day trial dressed up as free.
- AI that touches the core email workflow — copy, subject lines, preview text or design. A generic chatbot bolted onto a sidebar does not count.
- The free plan must let you actually send campaigns, not just preview a template.
- Published limits you can read before signing up.
One caveat shapes everything below: "free AI" almost always means AI features included in a free plan, with a cap on how many times you can use them. That cap — not the feature list — is what decides whether a tool works for your volume. If you generate subject lines for every campaign, an allowance of 100 AI actions a month runs out faster than you expect; the mechanics of how platforms meter this are worth understanding before you commit.
All competitor plan details below were verified on 2026-11-13 against each vendor's official pricing page. Pricing and free-tier limits change often, so confirm on the official page before deciding.
Choosing a provider at the same time? Our comparison of the Best Email Marketing Platforms ranks them by verified prices for your list size and sending volume.
Quick summary table
Verified 2026-11-13 against each vendor's official pricing page.
| Tool | Free plan | AI features on the free tier | Main free-plan limit |
|---|---|---|---|
| Mailerflow | Yes — 2,500 contacts, 10,000 emails/month | AI email builder (design, subject lines, preview text); AI automation builder | 100 AI actions/month, 3 active automations, Mailerflow branding |
| Mailchimp | Yes — a free plan is offered | Generative AI features are offered; which ones reach the free plan should be confirmed on the official pricing page | Free-plan contact and send limits are not in the verified set — check the official pricing page |
| Brevo | Yes — free forever plan, no credit card | AI content generator (subject lines, copy, tone adjustment) is listed on Starter; confirm free-plan AI entitlements on the official page | Free-plan send and contact caps should be confirmed on the official page |
| EmailOctopus | Yes — Starter: 2,500 subscribers, 10,000 emails/month | AI writing features are not in the verified set — treat as non-AI unless the official page says otherwise | Branding, 30-day reports, 1 landing page, 1 form, 1 user |
| ActiveCampaign | No free plan in the verified facts | Generative AI for content and images is listed on the Plus plan | Paid only — Plus includes 1,000 contacts, 10,000 sends/month, 1 user |
Free tiers change often; treat this as a starting point rather than a settled comparison.
The options, and what each is best for
Each entry covers what the product is, who it suits, and where the free tier runs out.
Mailerflow: AI that drafts the email and the automation
What it is. Mailerflow's AI email builder takes a description and returns a complete responsive design, plus subject lines and preview text. The AI automation builder works the same way at the workflow level: describe a sequence in a sentence and it drafts the trigger, waits, conditions and emails for you to review before activation. If you have ever sketched a welcome sequence on paper and then rebuilt it node by node, this is the part that saves the most time — the draft exists before you open the canvas.
Best for. Small teams who want to move from a sentence to a sendable draft, and who want automations drafted rather than assembled manually. The Free plan covers 2,500 contacts and 10,000 emails a month, which suits a list of that size sending one or two campaigns a week.
Limitations. Free includes 100 AI actions per month, 3 active automations and Mailerflow branding in sent emails. The AI actions cap is the number to watch: it covers generation across campaigns, so heavy copy generation across many sends will hit it. The automation draft also needs human review before it goes live — it is a starting point, not an autopilot. Paid plans start at $14.90/month and include unlimited emails.
Mailchimp: broad platform with generative AI features
What it is. Mailchimp offers a free plan and generative AI features, alongside enhanced automations, custom-coded email templates and customizable popup forms (verified 2026-11-13 on Mailchimp's pricing page).
Best for. Teams who want a familiar, wide platform and are comfortable checking current free-plan limits themselves before committing.
Limitations. The verified facts cover the Standard plan — a 14-day trial, up to 6,000 emails a month, from $20/month — rather than the free plan's AI entitlements. So the honest answer is that you should confirm on Mailchimp's official pricing page which AI features are included on free, and what the free plan's contact and send caps are. Do not assume the generative features you see advertised are all available at $0.
Brevo: free forever plan with an AI content generator
What it is. Brevo publishes a free forever plan with no credit card needed, positioned for individuals and solopreneurs building an online presence (verified 2026-11-13 on Brevo's pricing page). The Starter plan includes a drag & drop editor, templates, an AI content generator that drafts subject lines and email copy and adjusts tone, MCP for ChatGPT & Claude, advanced segmentation, basic reporting and email support in six languages, with sending from 5,000 emails per month.
Best for. Solo senders who want one free account that can grow into multi-channel later.
Limitations. The AI content generator details sit on Starter, so confirm which AI features reach the free plan on Brevo's official page. SMS credit is sold separately, and multi-step marketing automation is listed on Standard rather than Starter — so if automation is central to your plan, the free tier is a starting point, not the destination.
EmailOctopus: generous free sending, AI not the focus
What it is. The Starter plan is free and supports 2,500 subscribers and 10,000 emails per month, with EmailOctopus branding, reports available for 30 days, 1 landing page, 1 form and 1 user (verified 2026-11-13 on EmailOctopus's pricing page). Pro is $9/month billed yearly for 10,000 subscribers, full design control, reports available forever, unlimited landing pages and forms, and unlimited users.
Best for. Teams whose priority is free sending volume and simple templates — there are 100+ mobile-friendly templates — rather than AI generation.
Limitations. The verified facts do not list AI writing or subject-line generation, so treat this as a non-AI free option unless the official page says otherwise. Branding stays on free, reports are retained for 30 days, and the free plan allows one user.
ActiveCampaign: AI on paid plans, not a free tier
What it is. ActiveCampaign's Plus plan includes generative AI for content and images, cross-channel marketing, landing pages and site messages, 25 active business goals, 1,000 contacts, 10,000 sends/month and 1 user; Pro adds predictive sending, advanced segmentation and attribution; Enterprise adds SSO, HIPAA support and premium CRM integrations like Salesforce (verified 2026-11-13 on ActiveCampaign's pricing page). Every plan includes Active Intelligence credits, and ActiveCampaign states on that page that customers see 75% more engagement with Active Intelligence, with results guaranteed in 30 days or your money back.
Best for. Teams that will pay for AI-assisted sending and CRM depth.
Limitations. No free plan appears in the verified facts, so this is a paid reference point rather than a free pick — useful when you want to see what the paid tier above free looks like. The 75% engagement figure is ActiveCampaign's own claim from its pricing page, not an independent benchmark.
How to choose for your situation
Match the tier to your actual volume, not to the feature list.
Under 2,500 contacts, one or two campaigns a month. A free tier with 10,000 emails a month covers you comfortably. The variable to check is the AI action cap: if you generate subject lines and body copy for every campaign, count how many generations a month that is and compare it to the allowance. Mailerflow Free allows 100 AI actions; other platforms meter differently.
You want AI to write, not just design. Check whether the AI generator is on the free plan or starts on the first paid tier. Brevo's verified AI content generator sits on Starter; Mailchimp's free-plan AI entitlements need confirming. If writing help is the whole reason you are switching, this single line in the pricing table decides it.
You need automations, not just campaigns. Count active automations on the free plan. Mailerflow Free allows 3; multi-step marketing automation is a paid feature at Brevo. If your plan involves a welcome series, a re-engagement flow and a post-purchase sequence, that is already three.
You are past 2,500 contacts. Compare the first paid tier, not the free plan. Mailerflow paid plans start at $14.90/month with unlimited emails; EmailOctopus Pro is $9/month billed yearly for 10,000 subscribers. Different shapes of the same decision — one caps contacts and uncaps sends, the other caps both.
Questions to ask before you commit:
- What is the contact cap, and what happens when I pass it?
- What is the monthly send cap?
- How many AI actions or credits are included, and what counts as one?
- How many active automations can I run?
- Is branding removed on the first paid tier?
- Can I export contacts and suppression lists if I leave?
That last one matters more than it looks. A free tier you can leave cleanly is worth more than a slightly cheaper one you cannot.
FAQ
Are free AI email marketing tools actually free? Yes, usually as AI features inside a free plan with caps on contacts, sends and AI actions. The AI itself is rarely sold as a separate free product. You are trading volume limits and, often, vendor branding on your emails for the $0 price.
What can free AI actually do for email? Draft subject lines, preview text and body copy, adjust tone, and in some tools generate a full responsive design from a description. Mailerflow's AI email builder does the design and copy from one prompt; its AI automation builder drafts a workflow from a sentence.
What are the typical limits? Contact caps, monthly send caps, AI action or credit caps, active automation caps, branding on free sends, and shorter report retention. Any one of these can be the reason a free plan stops working for you.
Can I send unlimited emails for free? No — free plans cap monthly sends. Mailerflow Free allows 10,000 emails a month; unlimited emails start on paid plans. If a vendor advertises unlimited sending, check which tier that applies to.
When should I move to a paid plan? When you pass the contact or send cap, need more active automations than the free tier allows, want branding removed, or need longer report history. For most small lists, that is the point where the free tier has done its job.
Do I need to check pricing myself? Yes. Details here were verified on 2026-11-13 and pricing changes, so confirm on each vendor's official pricing page before you decide.
Describe your next email or automation in one sentence and let Mailerflow's AI build it — free plan, no credit card.
