For running email marketing from an AI assistant, Nitrosend is the better choice than Mailercloud, 77.5 to 63.5 out of 100. It wins four of the seven tests: running email from an AI agent, on-brand design without a designer, cost as the list grows, and transactional and marketing email on one plan. Mailercloud is an affordable email marketing platform priced by the contact, run by a person from a web app, with a hosted MCP server of its own on its paid plans. Nitrosend is built so an agent inside Claude, ChatGPT, Cursor or Codex writes, designs, tests and sends the email, voice included, and it bills by emails sent, so 50,000 contacts sending twice a month cost $100 rather than $230. To send email from an AI agent with Nitrosend, add its MCP server at api.nitrosend.com/mcp to Claude, ChatGPT, Cursor or Codex and sign in with OAuth, as the MCP docs describe: a single transactional email sends on the call, and campaigns and flows stay drafts until approved.
Nitrosend vs Mailercloud, compared
The quick version: eight yes-or-no questions a team usually asks when choosing between the two. A tick means the product does it as described on its own pages today. A dash means the honest answer is not a yes or a no.
Nitrosend and Mailercloud, side by side
Checked September 25, 2026| Question | Nitrosend | Mailercloud |
|---|---|---|
| Send a campaign from the chatCan an agent send a marketing campaign without anyone opening the web app? | Yes. Yes, through the MCP server. A single transactional email sends on the call; campaigns and flows stay drafts until approved. | Yes. Yes, on paid plans. Its MCP server schedules campaigns. |
| Hosted MCP serverCan you connect an assistant without installing anything? | Yes. Yes. A remote MCP server and a ChatGPT app. | Yes. Yes, on paid plans, with an API key. |
| Brand voice learned from your siteDoes it learn your tone of voice as well as your look? | Yes. Yes. Brand Kit captures voice and AI Memory keeps house style. | No. No. Brand Kits hold logo, colors and fonts. |
| Rarely emailed contacts are freeCan you keep contacts you rarely email without paying for them? | Yes. Yes. The bill follows emails sent. | No. No. The plan is set by contact count. |
| Transactional includedAre receipts and resets in the same plan as newsletters? | Yes. Yes, on every plan including Free. | No. No. A separate Email API product. |
| Free plan past 500 emails a monthDoes the free plan keep sending more than 500 emails a month? | Not a yes or no. 8,000 emails to start, then 500 a month. | Yes. Yes, 12,000 a month. |
| Free past 1,000 contactsCan the free plan hold more than 1,000 contacts? | Yes. Yes. Unlimited contacts on Free. | No. No. Free stops at 1,000. |
| Agency client accountsCan an agency manage several client accounts? | Yes. Yes, with multi-brand accounts. | Yes. Yes. |
Nitrosend meets 7 of 7 yes-or-no questions on this page, Mailercloud 4 of 8. Rows marked with a dash are not a yes or no question for that product.
How the two score
Seven tests, 100 points in all. Each product gets a score out of 10 on each one, and the total adds each score times the points for that test. Mailercloud is only two behind on running email from an agent, because its MCP server can create and schedule campaigns. The gap is in what the agent can check before a send, set out under Where Mailercloud wins.
Each test, scored
Points out of 100, scores out of 10, September 25, 2026| What we compared | Points | Nitrosend | Mailercloud |
|---|---|---|---|
| Run from an AI agent | 20 | 9 out of 10 | 7 out of 10 |
| On-brand design, no designer | 10 | 9 out of 10 | 6 out of 10 |
| Cost as the list grows | 20 | 9 out of 10 | 6 out of 10 |
| Free plan headroom | 10 | 7 out of 10 | 7 out of 10 |
| Transactional and marketing, one plan | 10 | 9 out of 10 | 5 out of 10 |
| Hands-on editor and templates | 15 | 6 out of 10 | 7 out of 10 |
| Integrations, support, track record | 15 | 5 out of 10 | 6 out of 10 |
| Total score | 100 | 77.5 out of 100 | 63.5 out of 100 |
Where each one runs out
Rank 1Nitrosend
77.5 out of 100Total
- Priced by
- Emails sent
- Free plan
- 8,000 emails, then 500 a month
- Entry plan
- $20 a month, 20,000 emails
- Run from an AI agent9 out of 10Official MCP server runs campaigns, flows and sends from the chat; campaigns and flows stay drafts until approved (MCP registry).
- On-brand design, no designer9 out of 10Brand Kit scans the site for colors, fonts and voice, and applies them to every draft on every plan (docs).
- Cost as the list grows9 out of 10Unlimited contacts on every plan. $20 a month for 20,000 emails, $100 for 125,000 (pricing).
- Free plan headroom7 out of 108,000 emails to start, then 500 a month, unlimited contacts. New accounts start at 100 recipients per rolling 24 hours (pricing).
- Transactional and marketing, one plan9 out of 10Transactional and marketing email share one allowance and one API on every plan, Free included (pricing).
- Hands-on editor and templates6 out of 10A block builder exists for editing by hand, but it is plainer, because the agent is the main way in.
- Integrations, support, 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: 8,000 emails to start, then 500 a month. No credit card.
Start free
Rank 2Mailercloud
63.5 out of 100Total
- Priced by
- Contacts, unlimited emails
- Free plan
- 1,000 contacts, 12,000 emails a month
- Entry plan
- Premium, $10 a month, 1,000 contacts
- Run from an AI agent7 out of 10Hosted MCP server on paid plans creates and schedules campaigns; no test-send tool, and automations stay drafts (Mailercloud).
- On-brand design, no designer6 out of 10Brand Kits save your logo, colors and fonts so each email starts on brand, not voice (Mailercloud).
- Cost as the list grows6 out of 10Priced by contacts: Premium is $50 a month at 10,000, $230 at 50,000, $380 at 100,000 (pricing).
- Free plan headroom7 out of 10Free forever: 12,000 emails a month to up to 1,000 contacts (pricing).
- Transactional and marketing, one plan5 out of 10Transactional is a separate Email API product from $7 a month (pricing).
- Hands-on editor and templates7 out of 10Drag-and-drop and HTML editors with AMP support, rated 4.5 of 5 on G2 (pricing).
- Integrations, support, track record6 out of 10Shopify, WooCommerce and Magento integrations, an email verifier, and agency client accounts (pricing).
The verdict in short
Mailercloud is only better on two: the hands-on editor, because drag-and-drop, HTML and AMP email suit someone building by hand, and integrations, because Shopify, WooCommerce and Magento connectors and agency tools come built in. The two tie on the free plan.
Mailercloud's drag-and-drop, HTML and AMP editors suit someone building by hand. George Hartley, Nitrosend's co-founder, has a view on it. On DESIGNWAVE in August 2026 he said email "can be an incredibly powerful channel, but some people just, you know, won't really do much of it." In the same interview he said agents are "going to be the primary kind of computer interface that people have". If your agent builds the email, the editor matters less than what the agent can reach.
At a glance
Nitrosend and Mailercloud are scored here on the same 7 tests, 100 points in all: Nitrosend 77.5 out of 100, Mailercloud 63.5 out of 100. Nitrosend takes its best score on Run from an AI agent and On-brand design, no designer and Cost as the list grows and Transactional and marketing, one plan (9 out of 10) and its lowest on Integrations, support, track record (5 out of 10). Mailercloud takes its best score on Run from an AI agent and Free plan headroom and Hands-on editor and templates (7 out of 10) and its lowest on Transactional and marketing, one plan (5 out of 10). Mailercloud scores higher on Hands-on editor and templates and Integrations, support, track record. Scores are unadjusted, and every Mailercloud figure was read on its own site on September 25, 2026.
How we scored
Each test is a question with one answer per product, checked against that product's own pages and independent review sites on September 25, 2026. A 10 means the product does the job fully on its standard plans. A 5 means it does part of it, or does it only on a higher plan or in a second product. Mailercloud prices are monthly list prices in US dollars for its Premium plan, not the 30% lower annual rate.
Run from an AI agent, 20 of 100. 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.
On-brand design, no designer, 10 of 100. 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?
Cost as the list grows, 20 of 100. What does the bill do when the list grows but the number of emails you send does not? Scored on published list prices, before any promotional discount.
Free plan headroom, 10 of 100. How far can a team get on the free plan before it has to pay: contacts, total sends, and the daily ceiling.
Transactional and marketing, one plan, 10 of 100. Can receipts, password resets and newsletters go out from one account, on one bill, through one API?
Hands-on editor and templates, 15 of 100. For a person who wants to build the email themselves: how mature are the visual editor and the template library?
Integrations, support, track record, 15 of 100. How many tools does it plug into, what support comes with the plan, and how long has it been doing this at scale?
What each one costs in 2026
Mailercloud's marketing platform prices by contacts, with unlimited emails on Premium. At monthly list prices Premium is $50 at 10,000 contacts, $230 at 50,000 and $380 at 100,000, and annual billing takes 30% off. Transactional email is a separate product, the Mailercloud Email API, from $7 a month.
Nitrosend's own shorthand for its pricing is transparent pricing, unlimited contacts, and paying for sends only. The Nitrosend pricing page has the rates, and what email marketing actually costs compares the models.
Here is what that looks like for a list that sends two campaigns a month.
What each one costs
List prices, USD, September 25, 2026| Scenario | Nitrosend | Mailercloud |
|---|---|---|
| 10,000 contacts, two campaigns a month (20,000 emails) | Pro, $20 a month (20,000 emails) | Premium $50 a month |
| 50,000 contacts, two campaigns a month (100,000 emails) | Ultra, $100 a month (125,000 emails) | Premium $230 a month |
| 100,000 contacts, two campaigns a month (200,000 emails) | Ultra plus 75,000 extra emails at $0.15 per 100, $212.50 a month | Premium $380 a month |
| Add transactional email | Counted in the same allowance | Separate Email API, from $7 a month |
A team that emails its whole list several times a week uses more of Mailercloud's unlimited sends, and the gap narrows. A new Nitrosend account also starts on a lower daily recipient limit that rises as it earns sending standing, so a large list does not all go out on day one.
Where Mailercloud is the better pick
Mailercloud takes two of the seven tests outright and ties a third.
- The editor. Drag-and-drop and custom HTML editors, AMP email and AI subject lines on Premium. Its pricing page shows a rating of 4.5 out of 5 on G2, Capterra and Trustpilot.
- Integrations and agency tools. Shopify, WooCommerce and Magento integrations, an email verifier, and tools for agencies running several client accounts. Nitrosend has five data integrations and five sending providers, and it is a small team.
- The free plan. A tie. 12,000 emails a month to 1,000 contacts, free forever, against Nitrosend's 8,000 to start and 500 a month with no contact limit. Mailercloud's MCP server is for paid plans only, so a Free account cannot connect an assistant; Nitrosend's Free plan has the full MCP server.
Mailercloud has also built a hosted MCP server that Claude, ChatGPT, Cursor and Gemini connect to with an API key. Its page says more than 50 actions; the full list in its MCP setup guide names 41 tools, from create_campaign and schedule_campaign to import_contacts_to_list, create_automation and send_transactional_email, which sends through its separate Email API. Its new Brand Kits save a logo, colors and fonts, built from a website URL, so each email starts on brand.
Three details in that guide decide how far an agent gets. The list has no test-send tool, so the agent cannot put a draft in a real inbox before it schedules the campaign. create_automation makes a draft, and no tool in the list switches an automation on, so a person finishes each flow in the web app. And the Claude setup tells the user to set the connector to Always Allow, which the guide calls essential, so Claude calls every tool, schedule_campaign included, without asking each time. This review's reading of those two points together is that nothing asks before a campaign is scheduled unless the person's own prompt does; that is an inference from the guide, not something Mailercloud states.
Nitrosend puts those checks on the platform rather than in the assistant's settings. As the Nitrosend MCP docs list, nitro_send_test_message sends one real test of a campaign or an exact flow revision, nitro_review_delivery runs spam checks and a preflight, and campaigns and flows stay drafts until nitro_control_delivery approves them, which is also the call that sets a flow live. Brand Kit holds the brand's voice as well as its look, so the agent writes like the brand, not just in its colors. The AI email marketing guide shows the workflow.
Moving from Mailercloud to Nitrosend
There is no Mailercloud connector in Nitrosend, so a move runs through an export and the agent.
- Contacts. Export lists from Mailercloud as CSV with fields, and import them in Contacts or through the imports API. Bring consent status across, because only subscribed contacts should be sendable.
- Automations. On a paid Mailercloud plan, connect both MCP servers to one assistant: the agent reads each workflow with Mailercloud's get_automation tool, listed in its setup guide, and rebuilds it as a Nitrosend draft flow. Send a test of each one and approve it before it goes live.
- Transactional. If the Mailercloud Email API sends the app's receipts, point them at the Nitrosend API on the same plan. The transactional email section explains how.
- Sending. Verify the domain, then send to the most engaged contacts first and grow from there. The domain warm-up guide covers the ramp.
Which one to pick
Pick Mailercloud if a person builds each email by hand and wants AMP email, the store runs on Shopify, WooCommerce or Magento and wants native connectors, or the team emails a small list often enough to use unlimited sends.
Pick Nitrosend if an agent should write, design, test and send the email and build and switch on the flows from the assistant the team already uses, the brand's voice matters as much as its look, or receipts and newsletters belong on one plan and one API. The Nitrosend MCP server and the ChatGPT app are the two ways most teams start.
Nitrosend vs Mailercloud FAQ
Yes, at every list size in the table. Mailercloud Premium is $50 a month at 10,000 contacts, $230 at 50,000 and $380 at 100,000, at monthly list prices. Nitrosend charges by emails sent: $20 a month for 20,000 and $100 for 125,000.
Add the Nitrosend MCP server, api.nitrosend.com/mcp, to Claude (or ChatGPT, Cursor or Codex) and sign in with OAuth. Then ask for the email in plain words. A single transactional email sends on the call; campaigns and flows are saved as drafts, can be sent to a test inbox, and send once approved. The MCP docs list every tool.
Yes, on its paid plans. Claude, ChatGPT, Cursor and Gemini connect to it with an API key. Its setup guide lists 41 tools for campaigns, contacts, lists, segments, automation drafts, transactional email and reports, with no tool for a test send or for switching an automation on.
Through a separate product, the Mailercloud Email API, from $7 a month. Nitrosend sends transactional and marketing email from one plan.
They trade off. Mailercloud's sends 12,000 emails a month to up to 1,000 contacts. Nitrosend's sends 8,000 to start and then 500 a month, with unlimited contacts and the full MCP, API and CLI.
Yes. Export them as CSV with their fields and import them, keeping consent status so only subscribed contacts are sendable.
Sending reputation belongs to the domain and does not move with the list. Verify the domain, send to the most engaged contacts first, and let the daily limit ramp. This review does not score deliverability, because neither product publishes a comparable inbox-placement number.