Starter
For your first email program.
$16USD / month
$192 billed yearly.
20,000 emails / month
Choose Starter- 5 brands · 3 seats
- 5 custom sending domains
- 500 email verifications/month
- $1.50 / 1,000 extra emails
Nitrosend is the best Campaign Monitor alternative for teams and agencies that run email from an AI assistant, with the top score of 76.5 out of 100. It scores 9 out of 10 on working from your AI assistant, the highest of the eight. To connect it, add the MCP server at api.nitrosend.com/mcp to Claude, ChatGPT, Cursor or Codex and sign in with OAuth. The assistant then writes each brand's campaign in its own colors, fonts and voice, and the campaign stays a draft until you approve it. Campaign Monitor has no official MCP server, and its API builds a campaign from the URL of an HTML file, so an assistant has to publish the email somewhere public before it can even create the draft. Contacts are unlimited on every Nitrosend plan, so a client list that sends twice a year costs nothing while it sits there. It also costs the least here: $20 a month for 20,000 emails and $650 for a million emails on Scale including overage. Brevo comes next at 74, then Klaviyo at 64.
The ranking
Rank 1Nitrosend
76.5 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 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 out of 10Brand Kit scans the site for colors, fonts and voice, and applies them to every draft on every plan (docs).
- Price8.5 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 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 out of 10Transactional and marketing email share one allowance and one API on every plan, Free included (pricing).
- Editor for building by hand6 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 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).
Nitrosend
Ask your agent for the next campaign
Connect Nitrosend to Claude, ChatGPT, Cursor or Codex, point Brand Kit at your site, and describe the email. Contacts are unlimited on every plan.
Free: 5,000 emails to start, then 500 a month. No credit card.
Start free
Rank 2Brevo
74 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 out of 10Official MCP server manages campaigns, contacts and templates, but lists no module for automations (Brevo developers).
- Emails in your brand, no designer7 out of 10Brand library fetches logo, colors, fonts and links from your site into the editor, not voice (Brevo help).
- Price6 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 out of 10300 emails a day, up to 100,000 contacts, transactional email included, free forever (Brevo help).
- Receipts and newsletters on one plan9 out of 10Every plan, Free included, has transactional email by API and SMTP in the same volume (pricing FAQ).
- Editor for building by hand8 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 out of 10150+ integrations, SMS, WhatsApp and a CRM in one account, phone support on Professional (pricing).
Rank 3Klaviyo
64 out of 100Total
- Priced by
- Active profiles
- Free plan
- 250 profiles, 500 emails a month
- Entry plan
- $20 a month, 500 profiles
- Works from your AI assistant8 out of 10Official remote MCP server with more than 300 tools, including
send_campaignandcreate_flow(Klaviyo developers). - Emails in your brand, no designer7 out of 10Brand library detects logos, colors, buttons and fonts from your site, but not voice (Klaviyo help).
- Price2 out of 10Billed by active profiles. $150 a month at 10,000, and 500,000 is by quote (pricing).
- Free plan4 out of 10250 active profiles and 500 emails a month, with email support for 60 days (pricing).
- Receipts and newsletters on one plan6 out of 10Transactional runs as approved flow messages on the same plan, with each message reviewed by Klaviyo first (help).
- Editor for building by hand9 out of 10Mature editor and flow builder, 4.6 of 5 across 1,362 reviews, Ease of Use the top tag (G2).
- Integrations, support and track record9 out of 10400+ pre-built integrations, deep Shopify data, and SMS, WhatsApp and reviews in one account (Klaviyo).
Rank 4MailerLite
61.5 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 out of 10Official MCP server with
create_campaign,schedule_campaignandcreate_automationtools (MailerLite help). - Emails in your brand, no designer7 out of 10Brand styles pull logo, colors, fonts and links from your site's URL, but not voice (MailerLite help).
- Price3 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 out of 10250 subscribers and 2,500 emails a month, with 3 automations and knowledge base support (pricing).
- Receipts and newsletters on one plan5 out of 10Transactional email is MailerSend, a separate product the pricing table links out to (pricing).
- Editor for building by hand8 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 out of 10100+ integrations, sites and landing pages built in, and 24/7 live chat on Power (pricing).
Rank 5Omnisend
61.5 out of 100Total
- Priced by
- Contacts emailed
- Free plan
- 250 contacts, 500 emails a month
- Entry plan
- $16 a month, 500 contacts
- Works from your AI assistant8 out of 10Official Claude connector and ChatGPT plugin, connected by OAuth, whose execute tool runs Send campaign, Create automation workflow and Enable automation workflow (docs).
- Emails in your brand, no designer7 out of 10Imports logo, colors and fonts from your Shopify, WooCommerce or BigCommerce store, not voice (Omnisend help).
- Price3 out of 10Billed by contacts. Standard is $132 a month at 10,000, and above 150,000 it is by quote (pricing).
- Free plan4 out of 10500 emails a month to up to 250 contacts, with 24/7 support (pricing).
- Receipts and newsletters on one plan6 out of 10Order and shipping emails run as automations on every plan, triggered by store events (Omnisend help).
- Editor for building by hand7 out of 104.6 of 5 across 1,245 reviews, but Limited Templates is a recurring complaint (G2).
- Integrations, support and track record8 out of 10335+ integrations, web push and 24/7 live chat on every plan, and SMS on Pro (pricing).
Rank 6ActiveCampaign
58.5 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 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 out of 10AI Brand Kit imports colors, fonts and logos from your URL and builds templates in its editor (ActiveCampaign).
- Price2 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 out of 10No free plan. A 14-day trial with up to 100 email sends (help).
- Receipts and newsletters on one plan5 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 out of 10Mature email designer and automation builder, 4.4 of 5 across 14,799 reviews (G2).
- Integrations, support and track record9 out of 101,000+ apps and integrations, premium Salesforce and Dynamics connectors, and a built-in CRM (apps).
Rank 7Constant Contact
51.5 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 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 out of 10BrandKit scans your website for logo, colors and images, but not voice (help).
- Price3 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 out of 10No free plan. The trial allows up to 100 email sends in total (help).
- Receipts and newsletters on one plan2 out of 10Its community manager says it is not designed for transactional email and has no transactional API (community).
- Editor for building by hand8 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 out of 10About 300 integrations, events, SMS and social tools, and phone support (pricing).
Rank 8Emma
34.5 out of 100Total
- Priced by
- Plan, with lists over 10,000 contacts quoted
- Free plan
- None
- Entry plan
- Emma Lite, $105 a month
- Works from your AI assistant1 out of 10No MCP server, and the public API manages lists and pending mailings but cannot create a campaign (API docs).
- Emails in your brand, no designer4 out of 10Brand Import scans your site for fonts and color palettes, with no logo or voice (Emma).
- Price3 out of 10Emma Lite is $105 a month and Teams $205, and any list over 10,000 contacts is quoted (pricing).
- Free plan1 out of 10No free plan or free trial on the pricing page, which leads with Request A Demo (pricing).
- Receipts and newsletters on one plan2 out of 10Transactional email appears nowhere on the pricing or integrations pages, and the API cannot send new mail (API docs).
- Editor for building by hand7 out of 10Drag-and-drop editor, template gallery, saved rows and code-your-own on every plan (pricing).
- Integrations, support and track record6 out of 10Native Salesforce, Blackbaud, HubSpot and Dynamics 365 connectors plus Zapier to 500+ services (integrations).
How they compare
How each one scores
Scores out of 10, November 10, 2026| What we compared | Nitrosend | Brevo | Klaviyo | MailerLite | Omnisend | ActiveCampaign | Constant Contact | Emma |
|---|---|---|---|---|---|---|---|---|
| Works from your AI assistant20 points | 9 out of 10 | 7 out of 10 | 8 out of 10 | 8 out of 10 | 8 out of 10 | 8 out of 10 | 5 out of 10 | 1 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 | 7 out of 10 | 4 out of 10 |
| Price20 points | 8.5 out of 10 | 6 out of 10 | 2 out of 10 | 3 out of 10 | 3 out of 10 | 2 out of 10 | 3 out of 10 | 3 out of 10 |
| Free plan10 points | 7 out of 10 | 8 out of 10 | 4 out of 10 | 5 out of 10 | 4 out of 10 | 1 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 | 6 out of 10 | 5 out of 10 | 6 out of 10 | 5 out of 10 | 2 out of 10 | 2 out of 10 |
| Editor for building by hand15 points | 6 out of 10 | 8 out of 10 | 9 out of 10 | 8 out of 10 | 7 out of 10 | 8 out of 10 | 8 out of 10 | 7 out of 10 |
| Integrations, support and track record15 points | 5 out of 10 | 8 out of 10 | 9 out of 10 | 7 out of 10 | 8 out of 10 | 9 out of 10 | 9 out of 10 | 6 out of 10 |
| Total scoreout of 100 | 76.5 out of 100,1st | 74 out of 100,2nd | 64 out of 100,3rd | 61.5 out of 100,tied 4th | 61.5 out of 100,tied 4th | 58.5 out of 100,6th | 51.5 out of 100,7th | 34.5 out of 100,8th |
Here are the seven yes-or-no questions teams and agencies usually ask before they move off Campaign Monitor. A tick means the platform does it, as described on its own pages today. A dash means the answer is not a clean yes or no.
8 services, side by side
Checked November 10, 2026QuestionNitrosendBrevoKlaviyoMailerLiteOmnisendActiveCampaignConstant ContactEmma
NitrosendBrevoKlaviyoMailerLiteOmnisendActiveCampaignConstant ContactEmmaSend 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.Klaviyo: Yes.MailerLite: Yes.Omnisend: Yes.ActiveCampaign: Yes.Constant Contact: No.Emma: 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. |
| Klaviyo | Yes. Yes. The official MCP server has a send_campaign tool. |
| MailerLite | Yes. Yes. Its MCP server can create and schedule campaigns. |
| Omnisend | Yes. Yes. Its connector's execute tool runs Send campaign. |
| 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. |
| Emma | No. No. There is no MCP server and the API cannot create a campaign. |
Official MCP serverIs there a first-party MCP server an AI assistant can connect to?Nitrosend: Yes.Brevo: Yes.Klaviyo: Yes.MailerLite: Yes.Omnisend: Yes.ActiveCampaign: Yes.Constant Contact: Yes.Emma: No.
| Service | Answer |
|---|---|
| Nitrosend | Yes. Yes. Listed as com.nitrosend/nitrosend on the official MCP registry. |
| Brevo | Yes. Yes, remote-hosted, with 27 modules. |
| Klaviyo | Yes. Yes, remote-hosted, with more than 300 tools. |
| MailerLite | Yes. Yes. It can also build automations, with create_automation. |
| Omnisend | Yes. Yes, as a ChatGPT plugin and a Claude connector. |
| ActiveCampaign | Yes. Yes, a remote MCP URL on every plan. |
| Constant Contact | Yes. Yes, as an official Claude connector, plus a ChatGPT app. |
| Emma | No. No. None on the official registry or Emma's site. |
Brand kit from your siteDoes it pick up your logo, colors and fonts from your website?Nitrosend: Yes.Brevo: Yes.Klaviyo: Yes.MailerLite: Yes.Omnisend: Yes.ActiveCampaign: Yes.Constant Contact: Yes.Emma: Not a yes or no.
| 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. |
| Klaviyo | Yes. Yes. The brand library detects logos, colors, buttons and fonts. |
| MailerLite | Yes. Yes. Brand styles pull logo, colors, fonts and links. |
| Omnisend | Yes. Yes. It imports logo, colors and fonts from the connected store. |
| ActiveCampaign | Yes. Yes, with the AI Brand Kit. |
| Constant Contact | Yes. Yes. BrandKit scans for logo, colors and images. |
| Emma | Not a yes or no. Brand Import pulls fonts and colors from your site, not logo or voice. |
Rarely emailed contacts are freeDo contacts you rarely email stop counting toward the bill?Nitrosend: Yes.Brevo: Yes.Klaviyo: No.MailerLite: No.Omnisend: No.ActiveCampaign: No.Constant Contact: No.Emma: Not a yes or no.
| Service | Answer |
|---|---|
| Nitrosend | Yes. Yes. Contacts are unlimited on every plan. |
| Brevo | Yes. Yes. The bill follows emails sent. |
| Klaviyo | No. No. Every active profile counts toward the plan. |
| MailerLite | No. No. The plan is set by subscriber count. |
| Omnisend | No. No. The plan is set by list size. |
| ActiveCampaign | No. No. The plan is set by how many contacts you hold. |
| Constant Contact | No. No. The plan is set by contact count. |
| Emma | Not a yes or no. Priced by plan. The page does not say how contacts are counted. |
Transactional includedAre receipts and resets in the same plan as newsletters?Nitrosend: Yes.Brevo: Yes.Klaviyo: Not a yes or no.MailerLite: No.Omnisend: No.ActiveCampaign: No.Constant Contact: No.Emma: No.
| Service | Answer |
|---|---|
| Nitrosend | Yes. Yes, on every plan including Free. |
| Brevo | Yes. Yes, on every plan including Free. |
| Klaviyo | Not a yes or no. Through approved, metric-triggered flows rather than a send call. |
| MailerLite | No. No. Transactional is MailerSend, a separate product. |
| Omnisend | No. No. Transactional emails run as store-triggered automations. |
| ActiveCampaign | No. No. Transactional is Postmark, billed separately. |
| Constant Contact | No. No. It is not built for transactional email. |
| Emma | No. No. Transactional email is not offered on the pricing page. |
Free planIs there a free plan with no time limit?Nitrosend: Yes.Brevo: Yes.Klaviyo: Yes.MailerLite: Yes.Omnisend: Yes.ActiveCampaign: No.Constant Contact: No.Emma: No.
| Service | Answer |
|---|---|
| Nitrosend | Yes. Yes. 5,000 emails to start, then 500 a month. |
| Brevo | Yes. Yes, 300 emails a day. |
| Klaviyo | Yes. Yes, up to 250 active profiles and 500 emails a month. |
| MailerLite | Yes. Yes, with a cap on subscribers and on emails a month. |
| Omnisend | 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. |
| Emma | No. No. Paid plans start at $105 a month. |
Mature drag-and-drop editorIs there a polished visual editor for a person building by hand?Nitrosend: Not a yes or no.Brevo: Yes.Klaviyo: Yes.MailerLite: Yes.Omnisend: Yes.ActiveCampaign: Yes.Constant Contact: Yes.Emma: 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. |
| Klaviyo | Yes. Yes, and reviewers rate it highly. |
| MailerLite | Yes. Yes, plus custom HTML and simple editors. |
| Omnisend | Yes. Yes, a drag-and-drop editor with prebuilt store workflows. |
| ActiveCampaign | Yes. Yes, and a mature automation builder. |
| Constant Contact | Yes. Yes, with hundreds of templates. |
| Emma | Yes. Yes, plus a template gallery and code-your-own emails. |
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 6 yes for Klaviyo5 of 7 yes for MailerLite5 of 7 yes for Omnisend4 of 7 yes for ActiveCampaign3 of 7 yes for Constant Contact1 of 5 yes for Emma
At a glance
8 services, the same 7 tests, 100 points in all. In order: Nitrosend 76.5, Brevo 74, Klaviyo 64, MailerLite 61.5, Omnisend 61.5, ActiveCampaign 58.5, Constant Contact 51.5, Emma 34.5. Nitrosend has the best score on Works from your AI assistant, Emails in your brand, no designer, Price and Receipts and newsletters on one plan. Every price and feature was read on each company's own pages on November 10, 2026.
When another platform is the better pick
Nitrosend does not win every test. Read these before you choose it.
- Stay on Campaign Monitor if you rebill clients with a markup. Its agency features add a markup to each client's bill and handle the billing, remove Campaign Monitor's branding from the app and lock template sections so a client cannot break the design. Nitrosend's pricing lists brands, seats and removable footer branding, but no client billing.
- Pick Brevo if you want email and SMS on one bill priced by sends. It scores higher on free plan, 8 to 7, and beats Nitrosend on editor and track record, and its transactional email is on every plan like Nitrosend's. Standard, with automation, is $69 a month for 20,000 emails.
- Pick Klaviyo if a store drives your sending. It scores 9 on the editor and 9 on track record, with 400+ integrations and deep Shopify data. It bills on active profiles, $150 a month at 10,000.
- Pick MailerLite if your clients are newsletter-shaped and you want a design-led editor at a published price. Its editor scores 8, and Comfort is $89 a month at 10,000 subscribers.
- Pick ActiveCampaign if behavior drives your email. 1,000+ integrations and a built-in CRM earn it a 9 on track record, though there is no free plan.
- Pick Omnisend for a smaller store that wants email and SMS in one automation. Its integrations and support score 8, with 24/7 live chat on every plan.
- Pick Constant Contact if you want a phone number to call. It scores 9 on track record, the joint highest here. An answer in its own community forum says it is not designed for transactional email.
- Pick Emma only if you want Campaign Monitor's owner without Campaign Monitor. It has a capable editor, a 7, but Marigold owns both, it has no free plan, and it scores 1 out of 10 on working from your AI assistant, the lowest here.
Why people leave Campaign Monitor
Campaign Monitor now sits inside Marigold, which lists Campaign Monitor, Emma and Vuture as its products. Its pricing page runs a Lite, Essentials, Premier and Enterprise ladder in Australian dollars, and its FAQ says other currencies, US dollars included, are arranged with you rather than published. On September 25, 2026 Lite was A$180 a month at 10,000 subscribers and Essentials A$277. Lite allows five times your subscriber count in emails a month, so a weekly sender belongs on Essentials, which is unlimited. There is no free plan, only a 30-day trial capped at 500 contacts and 500 emails.
The review record is where it gets uncomfortable. Campaign Monitor has a TrustScore of 2.2 out of 5 across 200 Trustpilot reviews, read on October 2, 2026, and the complaint that keeps coming back in the dated negatives is deleted accounts rather than raised bills. One reviewer on May 16, 2026 writes that after more than ten years the account and all its data were permanently deleted for inactivity. Another on August 31, 2024 writes that the account was closed without notice and all previous campaigns were lost. For an agency holding a seasonal client that sends twice a year, a quiet account reads as an at-risk account.
A second 12-month clock is easier to miss. Campaign Monitor's own policies count permission as valid only if it was given in the last 12 months, or if the person has been emailed during that time. A client list left unmailed for more than a year fails that test, and exporting it to another platform does not make it fresh. Mail the people who engaged recently first, and reconfirm the rest before they get a newsletter.
Agencies give up more in a move than single brands do. Campaign Monitor's agency tooling gives each client account its own API key, shares templates and automations across client accounts and handles client billing with a markup, and the same pricing page notes that select AI features may not be available to agency accounts. List which of these you use before you leave. Because Marigold owns Emma as well, moving to Emma is a move inside one company. In fairness, Campaign Monitor's templates and brand controls are good, and if your only complaint is the bill, get a renewal quote before you start moving. The Nitrosend and Campaign Monitor head to head goes through the two line by line.
What each one costs in 2026
The platforms here charge in two ways. Nitrosend and Brevo charge by emails sent. The rest charge by the size of your list, and Emma charges by plan with any list over 10,000 contacts quoted. To compare them fairly, the table prices the same two lists on every platform: 10,000 contacts emailed twice a month, which is 20,000 emails, and 500,000 contacts emailed twice a month, which is a million.
What sending costs
List prices, USD, monthly, November 10, 2026| Service | 20,000 emails a month | 1,000,000 emails a month |
|---|---|---|
| Nitrosend (pricing page) | $20Starter, contacts unlimited | $650Scale, contacts unlimited, including overage |
| Brevo (pricing page) | $69Standard, the first plan with automation. Starter is $32 without it | $999Professional. Standard stops at 500,000 emails |
| Klaviyo (pricing page) | $150Email, 10,000 active profiles | Ask salesBy quote. The published slider stops at 150,000 profiles, $1,955 |
| MailerLite (pricing page) | $89Comfort, 10,000 subscribers | Ask salesEnterprise, by quote. Published tiers stop at 200,000, $819 on Comfort |
| Omnisend (pricing page) | $132Standard, paid monthly. The page opens on a 30% prepay discount | Ask salesBy quote. Published tiers stop at 150,000 contacts, $1,456 |
| ActiveCampaign (pricing page) | $149Starter, billed yearly, 5 actions per automation. No monthly price is published | Ask salesBy quote. Published tiers stop at 50,000 contacts |
| Constant Contact (pricing page) | $120Lite, one automation template. Standard is $160 | Ask salesBy quote. Published tiers stop at 50,000 contacts |
| Emma (pricing page) | $105Emma Lite. The page does not say how many contacts this covers | Ask salesBy quote. Lists over 10,000 contacts are quoted |
At 20,000 emails a month Nitrosend is $20. Brevo is $69, MailerLite $89, Emma $105, Constant Contact $120, Omnisend $132, ActiveCampaign $149 billed yearly and Klaviyo $150. Campaign Monitor itself does not publish US dollar prices, and was A$180 on Lite for 10,000 subscribers.
At a million emails a month Nitrosend is $650 and Brevo $999. Klaviyo, MailerLite, Omnisend, ActiveCampaign, Constant Contact and Emma publish no price at that size.
The bigger difference is what the $20 buys. Contacts are unlimited on every Nitrosend plan, so a dormant client list costs nothing, receipts and password resets go out on the same allowance as your campaigns, and your AI assistant runs each brand. If you manage client accounts, count the contacts you hold across all of them before you compare, because that is the number the other platforms bill.
How we scored
Every platform 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 they decide what running email costs you in time and money. The editor and track record, where the older platforms are strongest, share 30 points, so a platform that is better there gets full credit for it.
Each test is a question with one answer per service, checked against the service's own pages on November 10, 2026. A 10 means it does the job fully on its normal plans. A 5 means it does part of it, or only on a higher plan or in a second product.
Works from your AI assistant, 20 points. Can an agent inside Claude, ChatGPT, Cursor or Codex compose a marketing campaign, test it, and send it, with no person opening the web app between the prompt and the send? An approval step the person answers in the chat counts as inside the agent. Moving into the web app to finish does not. Scored on one written rule for every vendor: a first-party server the vendor runs and that can send counts fully; a third-party wrapper (Zapier, Composio, Kanopi, community servers) counts for less; a server that only drafts or reads counts for less than one that sends.
Emails in your brand, no designer, 10 points. Does the product learn your logo, colors, fonts and voice from your own site and apply them to every email it drafts, on the plan most small teams start on?
Price, 20 points. What does email cost each month at 20,000 emails, a 10,000-contact list emailed twice, and at 1,000,000, a 500,000-contact list emailed twice? Scored on list prices in US dollars, paid monthly, at the cheapest plan that holds the contacts, covers the sends and includes automated emails such as a welcome series. Every ranking on this site uses the same fixed scale. At 20,000 emails, $20 or less scores 10, then $25 scores 9, $32 scores 8, $40 scores 7, $50 scores 6, $70 scores 5, $100 scores 4 and $140 scores 3. At 1,000,000, $500 or less scores 10, then $625, $800, $1,000, $1,250, $1,750, $2,500 and $3,500 step down the same way. Anything dearer, or a price given only by quote, scores 2. A free product scores 10. The score is the average of the two.
Free plan, 10 points. How far can a team get on the free plan before it has to pay: contacts, total sends, and the daily ceiling.
Receipts and newsletters on one plan, 10 points. Can receipts, password resets and newsletters go out from one account, on one bill, through one API?
Editor for building by hand, 15 points. For a person who wants to build the email themselves: how mature are the visual editor and the template library?
Integrations, support and track record, 15 points. How many tools does it plug into, what support comes with the plan, and how long has it been doing this at scale?
One thing is not scored: inbox placement. None of these platforms publishes a comparable deliverability number, so a score there would be a guess dressed up as a measurement.
Which Campaign Monitor alternative is best for an agency running client email?
Nitrosend, if your AI assistant is going to do the client work. Each client becomes a brand with its own Brand Kit and its own sender, plans include 3, 5, 10 or unlimited brands, and contacts are unlimited on all of them. Email volume is shared across the account, while each sender keeps its own reputation (pricing). The detail that matters day to day is how the assistant moves between clients. Over an OAuth connection it switches brand with one tool call, by name, while a connection made with an API key is pinned to that key's brand and cannot switch. That gives an agency a clean split: its own assistant signs in with OAuth and works across every client, and an assistant set up for a single client on that client's API key stays on that client's brand. MailerLite suits clients who are newsletter-shaped and want one predictable invoice per account. Email marketing for agencies covers how to set that up, and what MCP is explains how the assistant connects.
Agencies shaped that feature before Nitrosend went looking for them. George Hartley, its co-founder, said on The Breakout CEO in August 2026: "we got a couple of agencies discover us off X and like the ability to set up a client and admin and kind of optimize clients and flick between them as well." When the agency setup launched in September he wrote on LinkedIn: "Agencies found Nitrosend before we found them." and "your agent does the setup, you just approve what ships." On SaaS Stories he put the time saving plainly: "it's like a prompt or two instead of an afternoon."
What happens to my templates when I leave?
Templates do not port. A Campaign Monitor template is HTML marked up with its own template language, tags that mark which sections are editable, repeatable or filled from an RSS feed, and no other platform reads those tags. Export the HTML of the two or three templates that earn money, strip the tags and hand the result to the assistant as a design reference. With Brand Kit set, it writes new emails in the brand's colors, fonts and voice, so the rest of the library can stay behind. Contacts do port, as CSV with their custom fields, and those are what to get out cleanly.
How to move off Campaign Monitor without hurting deliverability
- Export every client's lists, and each client's suppression list, while the account is live. Campaign Monitor keeps a suppression list per client account, apart from the lists, and those addresses must stay unmailable in the new tool. Do it early, given the reports of quiet accounts being deleted.
- Check what you exported. The email blacklist checker tells you what you are carrying, and your email bounce rate on the first sends tells you how clean it is.
- Authenticate each brand's sender. Keep both senders in one SPF record per domain during the overlap. The email authentication guide covers the records.
- Warm up rather than switching in one send. How to warm up an email domain has the ramp, and run an inbox placement test before the first large campaign.
- Move one client at a time. A problem on one brand should not stall the rest.
The same method applies on ActiveCampaign's alternatives, Klaviyo's and Brevo's.
Campaign Monitor alternatives FAQ
Nitrosend, with the top score in this review, 76.5 out of 100. It runs several brands under one login, contacts are unlimited on every plan, it is $20 a month for 20,000 emails, and your AI assistant writes each brand's campaigns, which stay drafts until you approve them. Pick Brevo for email and SMS priced by sends, Klaviyo or Omnisend for a store, MailerLite for design-led newsletters at a published price, ActiveCampaign for deep automation and Constant Contact for phone support.
Marigold, which lists Campaign Monitor, Emma and Vuture as its products. Campaign Monitor's pricing now runs a Lite, Essentials, Premier and Enterprise ladder, priced in Australian dollars.
In Australian dollars, because that is the only currency its pricing page served on September 25, 2026. At 10,000 subscribers Lite was A$180 a month and Essentials A$277, and at 50,000 they were A$606 and A$985. Enterprise is by quote. Lite allows five times your subscriber count in emails a month, so compare Essentials if you send weekly.
Nitrosend, which scores 9 out of 10 on working from your AI assistant, the highest here. Its official MCP server is listed as com.nitrosend/nitrosend on the official MCP registry, so Claude, ChatGPT, Cursor or Codex can write a campaign and send it, and campaigns and flows stay drafts until you approve them. Klaviyo, MailerLite, Omnisend and ActiveCampaign score 8, Brevo 7, and Constant Contact 5. Emma scores 1, because it has no MCP server and its API cannot create a campaign. Campaign Monitor itself has no official MCP server either.
Add the Nitrosend MCP server at api.nitrosend.com/mcp as a connector in Claude and sign in with OAuth. Create one brand per client and point each Brand Kit at that client's site. Then ask Claude to switch to the client's brand, import the contacts you exported from Campaign Monitor, and write the next campaign. Claude can send a test first. The campaign stays a draft until you approve it, and a send to the whole list needs a separate confirmation.
Several, at small scale. Brevo is free at 300 emails a day. MailerLite is free to 250 subscribers and 2,500 emails a month. Klaviyo and Omnisend are free to 250 contacts and 500 emails. Nitrosend gives 5,000 emails to start, then 500 a month, with unlimited contacts and full API, MCP and CLI access. Campaign Monitor itself has no free plan, only a 30-day trial.
For campaigns, flows, segments, templates, contacts and transactional sending, yes, in one account with unlimited contacts, and with transactional and marketing kept in separate streams. Two things it does not replace: Campaign Monitor's client billing with a markup, and a hands-on editor as full as the older platforms'. Nitrosend's block builder scores 6 here, because the assistant is the main way in.
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