Verdict: Brevo is the best AI email marketing tool for small business in 2026. Its paid ladder starts at $9 a month, it bills on email volume rather than contact count, and automation plus AI send-time optimisation arrive at $18 a month (Brevo pricing, checked 22 September 2026). MailerLite is the runner-up and the better pick for the simplest editor and a usable free plan; Mailchimp is the incumbent most small businesses should stop defaulting to, because its 2026 free tier was cut hard and it still bills unsubscribed contacts.
TL;DR
- Best overall: Brevo. Unlimited contacts, pay per email sent, automation at $18/mo (Brevo).
- Best free tier: MailerLite. Free is now 250 subscribers and 2,500 emails a month after the June 2026 plan change (MailerLite).
- Best for ecommerce: Klaviyo. Genuine predictive analytics, but the bill climbs with active profiles (Klaviyo pricing).
- Best automation depth: ActiveCampaign, from $15/mo billed annually, no free plan (ActiveCampaign).
- Skip by default: Mailchimp free. 250 contacts, 500 emails a month, no automation, no scheduling (Mailchimp pricing).
- Last verified: 22 September 2026.
Which AI email marketing tool is best for a small business?
Brevo for most, MailerLite if simplicity matters more than headroom, Klaviyo only with real purchase data to feed it. Brevo wins structurally: it charges for emails sent, not people stored — a large quiet list costs a fraction of the contact-count bill.
| Factor | Brevo | MailerLite | GetResponse | ActiveCampaign | Klaviyo | Mailchimp |
|---|---|---|---|---|---|---|
| Entry paid price | $9/mo (Starter, 5,000 emails) | $12/mo (Comfort, 500 subs) | $19/mo (Starter) | $15/mo annual (Starter) | $20/mo (500 profiles) | $13/mo (Essentials, 500 contacts) |
| Free tier | 300 emails/day, unlimited contacts | 250 subscribers, 2,500 emails/mo | 500 contacts, 2,500 emails/mo | None (14-day trial) | 250 profiles, 500 emails/mo | 250 contacts, 500 emails/mo |
| Standout AI | AI copy and subject lines; send-time optimisation at $18 | AI writing assistant; MCP server for AI agents | AI generators, Perfect Timing sending | Active Intelligence automation builder, predictive sending | Predicted CLV, churn risk, next order date | Content Optimizer, send-time optimisation (Standard+) |
| Best for | Service businesses, large quiet lists | Newsletters, creators, first-time senders | Course and webinar sellers | Automation-heavy B2B and agencies | Shopify and ecommerce stores | Teams tied to its template and app ecosystem |
| Key limitation | Daily send caps on free; heavy senders pay per volume | Email ceiling is 10x your subscriber tier on Comfort | Only one automation workflow on Starter | No free plan; no unlimited-send tier | Usage-based billing scales fast | Bills unsubscribed contacts; automation locked above free |
All prices are list prices from each vendor's own pricing page on 22 September 2026, billed monthly unless noted.
What changed in email marketing pricing during 2026?
Three repricings happened this year, which is why a 2025 comparison will mislead you.
Mailchimp cut its free plan from 500 contacts and 1,000 monthly emails to 250 contacts and 500 monthly emails, with a 250-per-day cap, no automation, no scheduling and support limited to 30 days (Mailchimp pricing; dated February 2026 by SaaSProbe).
MailerLite renamed its plans on 16 June 2026 — Growing Business became Comfort, Advanced became Power — raised paid tiers, and cut the free plan to 250 subscribers and 2,500 monthly emails, migrating existing free accounts on 1 July 2026 (MailerLite plan update FAQ).
ActiveCampaign rebuilt its lineup around Active Intelligence across Starter, Plus, Pro and Enterprise, and added WhatsApp as a paid add-on; there is no free plan, only a 14-day trial (ActiveCampaign pricing).
What does the real bill look like at 2,500 and 10,000 contacts?
Entry prices are marketing; what matters is the bill at the list size you will actually reach. The table below is modelled from each vendor's published pricing ladder, billed monthly — approximate, not quoted.
| List size | Brevo | MailerLite | GetResponse | ActiveCampaign | Klaviyo | Mailchimp |
|---|---|---|---|---|---|---|
| 2,500 contacts | ~$18 (Standard, volume-based) | $25 (Comfort) | $59 (Marketer, unlimited sends) | ~$25-49 | ~$45-60 | $60 (Standard) |
| 10,000 contacts | ~$40-60 (volume-based) | $73 (Comfort) | ~$59-99 | ~$60-100 | ~$175-240 | $135 (Standard) |
Ladder sources: Brevo, MailerLite, GetResponse, ActiveCampaign, Klaviyo and Mailchimp. The Klaviyo 10,000-contact figure and the ActiveCampaign ranges come from third-party ladder tracking — confirm both in live checkout before budgeting. Brevo's figures are modelled from its volume bands: a typical small-business list sends a few thousand emails a month, inside the entry 5,000-email band (Brevo pricing).
A second axis almost nobody compares: the send cap. Mailchimp allows 10x on Essentials and 12x on Standard (Mailchimp pricing); MailerLite Comfort allows 10x its tier ceiling (MailerLite pricing); ActiveCampaign runs 10x to 12x (ActiveCampaign pricing) — exceed it and you pay overage or upgrade. GetResponse paid plans and MailerLite Power remove the cap under fair use; Brevo inverts the model, charging for volume with contacts unlimited.
Why is Brevo the best AI email marketing tool for small business?
Brevo's free plan gives 300 emails a day (roughly 9,000 a month) with unlimited contacts and AI subject lines (Brevo pricing). Starter at $9 a month covers 5,000 emails, the drag-drop editor, the AI content generator with tone adjustment, advanced segmentation and branding removal. Standard at $18 monthly ($16.17 annual) adds unlimited multi-step automation, A/B testing, AI send-time optimisation and landing pages. Professional starts at $449 with contact scoring, Aura AI segmentation, an AI data analyst, WhatsApp and push (Brevo pricing).
The honest limitations: the free plan's daily cap makes a single large launch send awkward, the volume model punishes aggressive daily senders, and templates are functional rather than beautiful. If you mail your whole list every weekday, run the volume maths first.
Is MailerLite a better choice than Brevo?
For a first newsletter, often yes. MailerLite free covers 250 subscribers, 2,500 emails a month and 3 automations. Comfort starts at $12 a month (500-subscriber tier) with the AI writing assistant, 50 automations and branding removal; Power starts at $25 with unlimited sends under fair use and 24/7 live chat (MailerLite pricing). MailerLite also ships an MCP server letting an AI assistant such as Claude or ChatGPT operate campaigns directly — unusual in this category, and worth reading alongside our comparison of model infrastructure choices for small business.
The tradeoff is headroom. Comfort's email allowance is tied to a multiple of your subscriber tier, so a list that mails frequently outgrows it sooner than Brevo's volume bands.
Should you still default to Mailchimp?
Only if you need its template library, app integrations or an existing team workflow. Mailchimp Standard is $20 a month at 500 contacts and $135 at 10,000, with Premium at $350 a month for unlimited seats and audiences; its AI features, including generative content and send-time optimisation, sit on Standard and above (Mailchimp pricing). The detail that catches people out: Mailchimp counts all contacts, including unsubscribed and non-subscribed records, so a badly cleaned list is still being billed.
When are Klaviyo, ActiveCampaign or GetResponse the right call?
Klaviyo earns its price when you have transaction data: predicted lifetime value, churn risk and next-order date per customer are real models, and its Shopify sync is the deepest in the category. It starts at $20 a month for 500 profiles, usage-based from there (Klaviyo pricing). A services business with no purchase history gives those models nothing to learn.
ActiveCampaign suits automation-heavy B2B teams and agencies who want a CRM-adjacent visual canvas, predictive sending and conditional content, from $15 a month billed annually (ActiveCampaign pricing). GetResponse fits creators: Starter at $19 monthly ($15.58 annual) with unlimited sends, Marketer at $59 ($48.38 annual) for abandoned-cart recovery and funnels, Creator at $69 for webinars and paid newsletters (GetResponse pricing).
How should you score these tools before buying?
Use a four-question rubric, not a feature checklist. Are you paying for AI plumbing (send-time optimisation, predictive segmentation, subject-line testing on your own data) or sparkle a free chatbot matches? Does the billing model match your shape? What is the send cap as a multiple of your list? And what the bill becomes once your list triples — the one you will actually live with.
Most shortlists collapse to two candidates within ten minutes. The same logic applies to adjacent tooling, such as AI accounting tools or AI customer service software.
Which tool should you choose for your situation?
- Under 500 subscribers, still testing: MailerLite Free or Brevo Free. Both are usable in production.
- Service business sending nurture sequences and quotes: Brevo Standard, $18 a month.
- Ecommerce store with purchase and browsing data: Klaviyo, and budget for usage-based billing.
- Automation-heavy B2B or agency work: ActiveCampaign Plus or above.
- Creator selling courses or digital products: GetResponse Creator or MailerLite Power.
- On Mailchimp out of habit: price the unsubscribed-contact billing first, then decide.
If your bottleneck is process rather than email, AI project management software and AI meeting assistants usually pay back faster than a platform migration.
What are the credible alternatives?
- Omnisend: ecommerce-focused with SMS built in — the lighter Klaviyo alternative.
- ConvertKit/Kit: creators and paid newsletters rather than campaigns.
- Beehiiv: newsletter-native with growth and monetisation tooling.
- Zoho Campaigns: worth a look if you already run Zoho CRM.
- Amazon SES plus a front end: cheapest at volume; you supply the marketing layer.
FAQ
Q: Is Brevo worth it for a small business?
A: Yes for most — $9 a month for 5,000 emails and $18 for unlimited multi-step automation with unlimited contacts is the cheapest route to real automation (Brevo pricing, checked 22 September 2026).
Q: Brevo vs Mailchimp for a service business?
A: Brevo, in most cases. Mailchimp Standard is $20 a month at 500 contacts and bills unsubscribed records (Mailchimp pricing); Brevo charges by email volume and keeps contacts unlimited.
Q: What is the cheapest AI email marketing tool?
A: Brevo Starter at $9 a month (Brevo pricing); MailerLite Comfort at $12 with an AI writing assistant is next (MailerLite pricing).
Q: Which email marketing tool has the best free plan in 2026?
A: Brevo for unlimited contacts on a 300-per-day cap (Brevo pricing); MailerLite for automation on a free plan at 250 subscribers and 2,500 monthly emails (MailerLite pricing). Mailchimp free is the weakest.
Q: Do I need Klaviyo if I run a Shopify store?
A: Not always, but it is the strongest fit once you have purchase history for its predictive models; new stores can start on Brevo or Omnisend and migrate later (Klaviyo pricing).
Q: Will AI features replace an email marketer?
A: No. The useful AI is optimisation, not strategy: send-time prediction, segmentation, subject-line testing. Offer, list hygiene and positioning still decide whether a campaign works.
Last verified: 22 September 2026. All pricing taken from vendor pricing pages on that date: Brevo, MailerLite, GetResponse, ActiveCampaign, Klaviyo, Mailchimp. Prices change without notice; confirm in checkout before you buy.
Updates: 22 September 2026 — this page replaces our June 2026 email-marketing comparison, which has been archived; all figures below were re-verified after the 2026 repricing wave.
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