The best small business email marketing programs for AI

Nitrosend is the best email marketing program for a small business that runs its email from AI, with the top score of the six reviewed here, 76.5 out of 100. It scores 9 out of 10 on working from your AI assistant, the heaviest test, and nobody on your team needs to learn it. Your AI assistant, whether Claude, ChatGPT, Cursor or Codex, writes each campaign in your brand's colors, fonts and voice and sends it once you approve it. Contacts are unlimited on every plan, and your receipts and newsletters go out on one plan and one bill. It costs $20 a month for 20,000 emails and $650 for a million emails on Scale including overage, the lowest paid price here at both volumes. Brevo comes next, at 74.

To run your email from an AI assistant with Nitrosend, add its MCP server, api.nitrosend.com/mcp, as a connector in Claude, ChatGPT, Cursor or Codex and sign in with OAuth. The MCP setup docs cover each one.

The ranking

Rank 1

Nitrosend

nitrosend.com

76.5/100 out of 100Total

Priced by

Emails sent

Free plan

5,000 emails, then 500 a month

Entry plan

$20 a month, 20,000 emails

• Works from your AI assistant9/10 out of 10Official MCP server runs campaigns, flows and sends from the chat; campaigns and flows stay drafts until approved (MCP registry).
• Emails in your brand, no designer9/10 out of 10Brand Kit scans the site for colors, fonts and voice, and applies them to every draft on every plan (docs).
• Price8.5/10 out of 10Unlimited contacts on every plan. $20 a month for 20,000 emails and $650 for a million emails on Scale including overage (pricing).
• Free plan7/10 out of 105,000 emails to start, then 500 a month, unlimited contacts. New accounts start at 100 recipients per rolling 24 hours (pricing).
• Receipts and newsletters on one plan9/10 out of 10Transactional and marketing email share one allowance and one API on every plan, Free included (pricing).
• Editor for building by hand6/10 out of 10A block builder exists for editing by hand, but it is plainer, because the agent is the main way in.
• Integrations, support and track record5/10 out of 10Shopify, Stripe, HubSpot, Attio and Mailchimp, five bring-your-own sending providers, a Node SDK, a CLI and signed webhooks for transactional email, but a young product from a small team (docs).

Rank 2

Brevo

brevo.com

74/100 out of 100Total

Priced by

Emails sent

Free plan

300 emails a day, 100,000 contacts

Entry plan

$9 a month, 5,000 emails

• Works from your AI assistant7/10 out of 10Official MCP server manages campaigns, contacts and templates, but lists no module for automations (Brevo developers).
• Emails in your brand, no designer7/10 out of 10Brand library fetches logo, colors, fonts and links from your site into the editor, not voice (Brevo help).
• Price6/10 out of 10Priced by emails sent. $69 a month for 20,000 on Standard, $32 on Starter without automation, and $999 for a million on Professional (pricing).
• Free plan8/10 out of 10300 emails a day, up to 100,000 contacts, transactional email included, free forever (Brevo help).
• Receipts and newsletters on one plan9/10 out of 10Every plan, Free included, has transactional email by API and SMTP in the same volume (pricing FAQ).
• Editor for building by hand8/10 out of 10Drag-and-drop editor and templates, 4.5 of 5 across 2,722 reviews, Ease of Use the top tag (G2).
• Integrations, support and track record8/10 out of 10150+ integrations, SMS, WhatsApp and a CRM in one account, phone support on Professional (pricing).

Rank 3

MailerLite

mailerlite.com

61.5/100 out of 100Total

Priced by

Subscribers

Free plan

250 subscribers, 2,500 emails a month

Entry plan

$12 a month, 500 subscribers

• Works from your AI assistant8/10 out of 10Official MCP server with create_campaign, schedule_campaign and create_automation tools (MailerLite help).
• Emails in your brand, no designer7/10 out of 10Brand styles pull logo, colors, fonts and links from your site's URL, but not voice (MailerLite help).
• Price3/10 out of 10Priced by subscribers. $89 a month at 10,000 on Comfort, and a quote above 200,000, where Comfort is $819 (pricing).
• Free plan5/10 out of 10250 subscribers and 2,500 emails a month, with 3 automations and knowledge base support (pricing).
• Receipts and newsletters on one plan5/10 out of 10Transactional email is MailerSend, a separate product the pricing table links out to (pricing).
• Editor for building by hand8/10 out of 10Three editors on every plan, drag-and-drop included, and 4.6 of 5 across 1,113 reviews (G2).
• Integrations, support and track record7/10 out of 10100+ integrations, sites and landing pages built in, and 24/7 live chat on Power (pricing).

Rank 4

Mailchimp

mailchimp.com

59/100 out of 100Total

Priced by

Contacts held

Free plan

250 contacts, 500 sends a month

Entry plan

$13 a month, 500 contacts

• Works from your AI assistant5/10 out of 10Its Claude and ChatGPT app drafts campaigns, but Mailchimp's own guide says to finish and send in the web app (Mailchimp).
• Emails in your brand, no designer7/10 out of 10Brand Kit pulls fonts from your site and generates on-brand layouts, on Essentials and above only (Mailchimp help).
• Price3/10 out of 10Priced by contacts. $110 a month at 10,000 on Essentials, $135 on Standard, and a quote at 500,000 (pricing).
• Free plan4/10 out of 10250 contacts and 500 sends a month, with at most 250 a day (Mailchimp help).
• Receipts and newsletters on one plan5/10 out of 10Transactional is a separate add-on for Standard and Premium, at $20 per 25,000 emails (pricing).
• Editor for building by hand9/10 out of 10Mature drag-and-drop editor and templates, the most common praise from reviewers, 4.3 of 5 across 12,990 reviews (G2).
• Integrations, support and track record9/10 out of 10300+ integrations, 24/7 support on paid plans, phone support on Premium, and two decades at scale (pricing).

Rank 5

ActiveCampaign

activecampaign.com

58.5/100 out of 100Total

Priced by

Contacts held

Free plan

None, a 14-day trial

Entry plan

$15 a month, 1,000 contacts, billed annually

• Works from your AI assistant8/10 out of 10Official MCP server creates a campaign and sends or schedules it once you approve its summary in the chat, and manages contacts, lists, tags and automations (tools).
• Emails in your brand, no designer7/10 out of 10AI Brand Kit imports colors, fonts and logos from your URL and builds templates in its editor (ActiveCampaign).
• Price2/10 out of 10Priced by contacts. Starter is $149 a month at 10,000, billed yearly because no monthly price is published, and above 50,000 it is by quote (pricing).
• Free plan1/10 out of 10No free plan. A 14-day trial with up to 100 email sends (help).
• Receipts and newsletters on one plan5/10 out of 10Transactional email is Postmark, a separate product with its own account and bill, linked by an app (ActiveCampaign).
• Editor for building by hand8/10 out of 10Mature email designer and automation builder, 4.4 of 5 across 14,799 reviews (G2).
• Integrations, support and track record9/10 out of 101,000+ apps and integrations, premium Salesforce and Dynamics connectors, and a built-in CRM (apps).

Rank 6

Constant Contact

constantcontact.com

51.5/100 out of 100Total

Priced by

Contacts held

Free plan

None, a trial with 100 sends

Entry plan

$12 a month, 500 contacts

• Works from your AI assistant5/10 out of 10Its Claude connector drafts and previews emails, then hands you a link to finish sending in Constant Contact (help).
• Emails in your brand, no designer7/10 out of 10BrandKit scans your website for logo, colors and images, but not voice (help).
• Price3/10 out of 10Priced by contacts. $120 a month at 10,000 on Lite, $160 on Standard, and a quote above 50,000 (pricing).
• Free plan1/10 out of 10No free plan. The trial allows up to 100 email sends in total (help).
• Receipts and newsletters on one plan2/10 out of 10Its community manager says it is not designed for transactional email and has no transactional API (community).
• Editor for building by hand8/10 out of 10Hundreds of templates and a drag-and-drop editor, 4.1 of 5 across 7,536 reviews (G2).
• Integrations, support and track record9/10 out of 10About 300 integrations, events, SMS and social tools, and phone support (pricing).

How they compare

How each one scores

Scores out of 10, November 10, 2026

Scores out of 10 for 6 services on 7 tests, with the total out of 100.

What we compared	Nitrosend	Brevo	MailerLite	Mailchimp	ActiveCampaign	Constant Contact
Works from your AI assistant20 points	9 out of 10	7 out of 10	8 out of 10	5 out of 10	8 out of 10	5 out of 10
Emails in your brand, no designer10 points	9 out of 10	7 out of 10	7 out of 10	7 out of 10	7 out of 10	7 out of 10
Price20 points	8.5 out of 10	6 out of 10	3 out of 10	3 out of 10	2 out of 10	3 out of 10
Free plan10 points	7 out of 10	8 out of 10	5 out of 10	4 out of 10	1 out of 10	1 out of 10
Receipts and newsletters on one plan10 points	9 out of 10	9 out of 10	5 out of 10	5 out of 10	5 out of 10	2 out of 10
Editor for building by hand15 points	6 out of 10	8 out of 10	8 out of 10	9 out of 10	8 out of 10	8 out of 10
Integrations, support and track record15 points	5 out of 10	8 out of 10	7 out of 10	9 out of 10	9 out of 10	9 out of 10
Total scoreout of 100	76.5 out of 100,1st	74 out of 100,2nd	61.5 out of 100,3rd	59 out of 100,4th	58.5 out of 100,5th	51.5 out of 100,6th

Here are the seven yes-or-no questions small business owners usually ask before they pick an email program. A tick means the program does it, as described on its own pages today. A dash means the answer is not a clean yes or no.

6 services, side by side

Checked November 10, 2026

QuestionNitrosendBrevoMailerLiteMailchimpActiveCampaignConstant Contact

Send a campaign from the chatCan an agent send a marketing campaign without anyone opening the web app?Nitrosend: Yes.Brevo: Not a yes or no.MailerLite: Yes.Mailchimp: No.ActiveCampaign: Yes.Constant Contact: No.

Service	Answer
Nitrosend	Yes. Yes, through the MCP server. Campaigns stay drafts until approved.
Brevo	Not a yes or no. Its MCP server creates and manages email campaigns. Its docs list no module for automations.
MailerLite	Yes. Yes. Its MCP server can create and schedule campaigns.
Mailchimp	No. Not yet. Its Claude and ChatGPT app drafts the campaign, and Mailchimp's own guide has you finish and send in the web app.
ActiveCampaign	Yes. Yes, once you approve its summary in the chat.
Constant Contact	No. No. Claude hands you a link to finish sending in Constant Contact.

Official MCP serverIs there a first-party MCP server for marketing email?Nitrosend: Yes.Brevo: Yes.MailerLite: Yes.Mailchimp: Not a yes or no.ActiveCampaign: Yes.Constant Contact: Yes.

Service	Answer
Nitrosend	Yes. Yes. Listed as com.nitrosend/nitrosend on the official MCP registry.
Brevo	Yes. Yes, remote-hosted, with 27 modules.
MailerLite	Yes. Yes. It can also build automations, with create_automation.
Mailchimp	Not a yes or no. Official Claude and ChatGPT app and connectors on Standard and above. The only official MCP server covers Transactional.
ActiveCampaign	Yes. Yes, a remote MCP URL on every plan.
Constant Contact	Yes. Yes, as an official Claude connector, plus a ChatGPT app.

Brand kit from your siteDoes it pick up your logo, fonts and colors from your website?Nitrosend: Yes.Brevo: Yes.MailerLite: Yes.Mailchimp: Yes.ActiveCampaign: Yes.Constant Contact: Yes.

Service	Answer
Nitrosend	Yes. Yes. Brand Kit reads colors, fonts and voice from your site.
Brevo	Yes. Yes. The brand library fetches logo, colors, fonts and links.
MailerLite	Yes. Yes. Brand styles pull logo, colors, fonts and links.
Mailchimp	Yes. Yes, on Essentials and above.
ActiveCampaign	Yes. Yes, with the AI Brand Kit.
Constant Contact	Yes. Yes. BrandKit scans for logo, colors and images.

Rarely emailed contacts are freeDoes holding a contact you rarely email cost nothing?Nitrosend: Yes.Brevo: Yes.MailerLite: No.Mailchimp: No.ActiveCampaign: No.Constant Contact: No.

Service	Answer
Nitrosend	Yes. Yes. Contacts are unlimited on every plan.
Brevo	Yes. Yes. The bill follows emails sent.
MailerLite	No. No. The plan is set by subscriber count.
Mailchimp	No. No. Every contact counts toward the tier, unsubscribed and non-subscribed ones included.
ActiveCampaign	No. No. The plan is set by how many contacts you hold.
Constant Contact	No. No. The plan is set by contact count.

Transactional includedAre receipts and resets in the same plan as newsletters?Nitrosend: Yes.Brevo: Yes.MailerLite: No.Mailchimp: No.ActiveCampaign: No.Constant Contact: No.

Service	Answer
Nitrosend	Yes. Yes, on every plan including Free.
Brevo	Yes. Yes, on every plan including Free.
MailerLite	No. No. Transactional is MailerSend, a separate product.
Mailchimp	No. Add-on to Standard or Premium, $20 per 25,000 emails.
ActiveCampaign	No. No. Transactional is Postmark, billed separately.
Constant Contact	No. No. It is not built for transactional email.

Free plan with no time limitIs there a free plan that does not expire?Nitrosend: Yes.Brevo: Yes.MailerLite: Yes.Mailchimp: Yes.ActiveCampaign: No.Constant Contact: No.

Service	Answer
Nitrosend	Yes. Yes. 5,000 emails to start, then 500 a month.
Brevo	Yes. Yes, 300 emails a day.
MailerLite	Yes. Yes, with a cap on subscribers and on emails a month.
Mailchimp	Yes. Yes, up to 250 contacts.
ActiveCampaign	No. No. A 14-day trial with up to 100 sends.
Constant Contact	No. No. A trial with up to 100 sends.

Mature drag-and-drop editorIs there a polished visual editor for a person building by hand?Nitrosend: Not a yes or no.Brevo: Yes.MailerLite: Yes.Mailchimp: Yes.ActiveCampaign: Yes.Constant Contact: Yes.

Service	Answer
Nitrosend	Not a yes or no. A block builder exists. The agent is the main way in.
Brevo	Yes. Yes, with templates and a brand library.
MailerLite	Yes. Yes, plus custom HTML and simple editors.
Mailchimp	Yes. Yes, and reviewers rate it highly.
ActiveCampaign	Yes. Yes, and a mature automation builder.
Constant Contact	Yes. Yes, with hundreds of templates.

Yes answersOut of the questions that have a yes or no for that service6 of 6 yes for Nitrosend6 of 6 yes for Brevo5 of 7 yes for MailerLite3 of 6 yes for Mailchimp4 of 7 yes for ActiveCampaign3 of 7 yes for Constant Contact

When another program is the better pick

Nitrosend does not win every test. Read these before you choose it.

• Pick Brevo if you hold a big list and mail it rarely. It bills on emails sent rather than contacts held, and its free plan is 300 emails a day and free forever. It beats Nitrosend on free plan, 8 to 7, on the editor, 8 to 6, and on integrations and track record, 8 to 5. Automation starts on Standard, $69 a month at 20,000 emails, and Starter is $32 without it.
• Pick MailerLite if you want the plainest job done at a low price. It scores 8 on the editor, and its MCP server can create and schedule campaigns and draft automations. Comfort is $89 a month at 10,000 subscribers, and the free plan is 250 subscribers and 2,500 emails a month.
• Pick ActiveCampaign if the automation is the product. It scores 9 on integrations and track record and 8 on the editor, with an automation builder and a CRM in the same account (pricing). Starter is $149 a month at 10,000 contacts, billed yearly, and there is no free plan.
• Pick Constant Contact if integrations and a familiar editor matter more than price. It scores 9 on integrations and track record and 8 on the editor, and its Claude connector drafts the email, then hands you a link to launch it in Constant Contact. Lite is $120 a month at 10,000 contacts, and there is no free plan.
• Pick Mailchimp if the familiarity is worth the bill. It scores 9 on the editor, the best here, and 9 on integrations and track record. It bills on every contact, unsubscribed ones included, from $110 a month at 10,000 on Essentials and $135 on Standard. The Mailchimp alternatives page covers where people went.

What each one costs in 2026

Four of the six charge for every contact you hold, whether you email it or not. Mailchimp, MailerLite, Constant Contact and ActiveCampaign all price by list size. Brevo and Nitrosend charge for the emails you send, and Nitrosend does not charge for contacts at all.

At 20,000 emails a month, a 10,000-contact list emailed twice, Nitrosend is $20. Brevo is $69 on Standard, MailerLite $89, Mailchimp $110, Constant Contact $120 and ActiveCampaign $149 billed yearly.

At a million emails a month, Nitrosend is $650. Brevo is $999 on Professional, because Standard stops at 500,000 emails. The other four publish no price at 500,000 contacts, so the answer is a sales call. What email marketing really costs has the wider math.

The bigger difference is what the $20 buys. The Nitrosend pricing page puts contacts at unlimited on every plan, and receipts and newsletters draw on the same allowance. If you would otherwise pay a contact-priced program for the list and a second service for order confirmations, add the two bills together before you compare.

How we scored

Every program gets a score out of 10 on the same seven tests. Each test is worth a set number of points, 100 in all. Working from your AI assistant and price are worth the most, 20 points each, because a small business rarely has a marketer or a spare hour. The editor and the track record, where the older programs are strongest, share 30 points, so a program that is better there gets full credit for it.

One thing is not scored: inbox placement. None of these programs publishes a comparable deliverability number, so a score there would be a guess dressed up as a measurement.

Key features to look for in a small business email program

Ignore feature lists. Five things decide whether the tool gets used, and keeps you out of trouble.

• How the contacts are counted. Per-contact billing punishes a business with a long history and a slow send cadence, which is most small businesses. Per-send billing punishes high frequency to a small list. Work out which shape you are before you compare prices.
• Whether the automation runs without you. A welcome series, an abandoned cart and a winback are the three that earn money. If they take a week to build you will not build them. The email automation workflow page has the three in order.
• Whether segmentation works for a non-marketer. Gmail's sender guidelines ask senders to keep spam reports below 0.10% and never reach 0.30%, and that line is crossed by who you sent to far more often than by what you wrote. Email segmentation covers the basic cuts.
• Whether it catches the legal basics before you send. Every marketing email needs a physical postal address. The FTC's CAN-SPAM guide accepts a PO box registered with the Postal Service or a registered private mailbox, so a business run from home does not have to print its home address. Nitrosend's Brand Kit holds the address, and its status check blocks campaign approval and live sends until one is set, so an assistant cannot send a campaign without it.
• A drag-and-drop editor, but less than you think. Every tool here has one. The campaigns that work are usually plain, and the most produced ones are often the ones people ignore.

Which email program is cheapest for a small business?

It depends on how each one counts you. Brevo and Nitrosend bill on emails sent, so a business holding 20,000 contacts and mailing them monthly pays for 20,000 emails rather than for 20,000 people. Mailchimp, MailerLite, Constant Contact and ActiveCampaign bill on contacts held, so the same business pays every month whether it sends or not. Compare at your real contact count and send volume, never at the entry price, and check whether unsubscribed contacts still count against you. On Mailchimp they do: its pricing help counts subscribed, unsubscribed and non-subscribed contacts. Email marketing for small business covers what to send once the tool is picked.

Can I run email marketing without hiring a marketer?

Yes, and it is now the normal case. The bottleneck in a small business is rarely the software. It is that nobody has an hour. In Constant Contact's Small Business Now survey of more than 1,300 small businesses, 56 percent said they have an hour or less a day for marketing, and 52 percent routinely put it off. A program that needs an afternoon in a dashboard waits for an afternoon that never comes. One your AI assistant can operate gets used, which is why that test carries the most points here.

George Hartley, Nitrosend's co-founder, has built for this owner twice. Of SmartrMail, his previous email company, he said on The Breakout CEO in August 2026 that Shopify and BigCommerce stores, "often they're run by small teams who may not have experts in, um, email marketing, but they have all the data." His advice now is shorter. On SaaS Stories in September he said he would "just say hey tell AI my goal is to like you know send a good volume of email to the right people set it up for me". The hour a day goes further when the assistant does the setting up and you do the approving.

The assistants do not all get the same distance. Nitrosend's and MailerLite's MCP servers can take a campaign through to sending from the chat. Brevo's creates and manages campaigns. ActiveCampaign's creates a campaign and sends it once you approve its summary in the chat. Mailchimp's Claude guide has you move into your account to finalize and send. Agentic email explains what the term covers.

Handing the work to an assistant does not hand over the responsibility. The FTC's CAN-SPAM guide says that even if you hire another company to handle your email marketing, you can't contract away your legal responsibility, and each email in violation can cost up to $53,088. So the step that matters is the one where you say yes. In Nitrosend, building a campaign never sends it. It stays a draft until a separate approval, and a send to every contact needs one more explicit confirmation (MCP examples).

What should a small business send, and how often?

Start with three automated emails and one campaign a month. The welcome email, the abandoned cart if you sell online, and a winback at ninety days do most of the work, and they run without you. One monthly campaign in plain language, from whoever founded the business, will beat a weekly produced newsletter written by nobody in particular. Frequency is the fastest way to burn a list, and every unsubscribe is a customer you paid to acquire.

Moving from your current program without losing deliverability

The import takes an afternoon. The reputation takes weeks.

• Export contacts and engagement history together. Do it while you still have access, because engagement history is what lets you send to people who actually open things during the switch.
• Clean what you exported. A list does not improve by changing programs. The email blacklist checker shows what you are carrying.
• Authenticate the new sender on your domain. List both senders in one SPF record during the overlap. The email authentication page has the records.
• Rebuild the automations that earn money first. A contact export carries people, not flows, so describe each flow to your assistant and have it rebuild them in the new program.
• Send to your most engaged people first and widen slowly. How to warm up an email domain has the ramp, and your bounce rate tells you when to slow down.

Small business email programs FAQ

Related reading

• Email segmentation
• Email automation workflows
• Agentic email, explained
• Email authentication explained
• Email bounce rate

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