For running email marketing from an AI assistant, Nitrosend is the better choice than Mailsoftly, 77.5 to 54.5 out of 100. It wins five of the seven tests: running email from an AI agent, on-brand design without a designer, cost as the list grows, the free plan, and transactional and marketing email on one plan. The other two are ties. Mailsoftly is a founder-led, bootstrapped email platform for small teams, and it is ahead of most on AI, with a hosted MCP server and 139 tools and an AI brand kit on every plan. Nitrosend adds the brand's voice to the kit, sends receipts from the same API, and bills by the emails sent, so 10,000 contacts cost $20 a month rather than $99. 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 Mailsoftly, compared
The quick version: seven yes-or-no questions a small 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 Mailsoftly, side by side
Checked September 25, 2026| Question | Nitrosend | Mailsoftly |
|---|---|---|
| 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, once you grant the separate send permission. |
| Hosted MCP serverCan you connect an assistant without installing anything? | Yes. Yes. A remote MCP server and a ChatGPT app. | Yes. Yes, with OAuth. |
| Brand kit from your websiteDoes it learn your look from your website? | Yes. Yes, with voice and house style kept in AI Memory. | Yes. Yes, on every plan. |
| Rarely emailed contacts are freeCan you keep contacts you rarely email without paying for them? | Yes. Yes. The bill follows emails sent. | No. No. Each plan caps contacts. |
| Transactional includedAre receipts and resets in the same plan as newsletters? | Yes. Yes, on every plan including Free. | No. Not listed. |
| Published price above 30,000 contactsCan you see the price for a larger list without a sales call? | Yes. Yes, on the pricing page. | No. No. Custom pricing above 30,000. |
| Free past 500 contactsCan the free plan hold more than 500 contacts? | Yes. Yes. Unlimited contacts on Free. | No. No. Free stops at 500. |
Nitrosend meets 7 of 7 yes-or-no questions on this page, Mailsoftly 3 of 7. 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. Mailsoftly comes within a point on both of the AI tests.
Each test, scored
Points out of 100, scores out of 10, September 25, 2026| What we compared | Points | Nitrosend | Mailsoftly |
|---|---|---|---|
| Run from an AI agent | 20 | 9 out of 10 | 8 out of 10 |
| On-brand design, no designer | 10 | 9 out of 10 | 8 out of 10 |
| Cost as the list grows | 20 | 9 out of 10 | 3 out of 10 |
| Free plan headroom | 10 | 7 out of 10 | 5 out of 10 |
| Transactional and marketing, one plan | 10 | 9 out of 10 | 3 out of 10 |
| Hands-on editor and templates | 15 | 6 out of 10 | 6 out of 10 |
| Integrations, support, track record | 15 | 5 out of 10 | 5 out of 10 |
| Total score | 100 | 77.5 out of 100 | 54.5 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 2Mailsoftly
54.5 out of 100Total
- Priced by
- Contacts and sends
- Free plan
- 500 contacts, 2,000 sends a month
- Entry plan
- Starter, $19 a month, 1,000 contacts
- Run from an AI agent8 out of 10Hosted MCP server with 139 tools. Sending a campaign is a separate permission you opt into (Mailsoftly).
- On-brand design, no designer8 out of 10AI brand kit from your website on every plan, Free included, with AI email designs (pricing).
- Cost as the list grows3 out of 10Business is $99 a month for 15,000 contacts. Above 30,000 contacts it is custom pricing (pricing).
- Free plan headroom5 out of 10Free for 500 contacts and 2,000 sends a month (pricing).
- Transactional and marketing, one plan3 out of 10No transactional email service is listed on its plans (pricing).
- Hands-on editor and templates6 out of 10Drag-and-drop, rich-text or HTML editor with AI email designs and templates (pricing).
- Integrations, support, track record5 out of 10Shopify, Zapier, SMS and free migration, with a 30-day money-back guarantee (pricing).
The verdict in short
Mailsoftly is not ahead on any of the seven tests outright. The two tie on the hands-on editor, and on extras and support, where Mailsoftly brings Shopify revenue tracking, free migration and a 30-day money-back guarantee, and Nitrosend brings a REST API, a Node SDK, a CLI and five bring-your-own sending providers. Mailsoftly also sends texts, where texting in Nitrosend is coming soon.
On the tests where the two tie, the deciding question is who will run the email. George Hartley, Nitrosend's co-founder, has a view on it. On SaaS Stories in September 2026 he said that when sending goes awry, "often it can be to do with, you know, you might be not segmenting properly or all those things." In the same interview he described moving his own list to a new system with Claude: "what I was getting out actually wasn't optimal, I think." His conclusion: "maybe an agent needs more specific guidance, like a skill basically for setting up emails." If it is an assistant, compare how much of each it can drive.
At a glance
Nitrosend and Mailsoftly are scored here on the same 7 tests, 100 points in all: Nitrosend 77.5 out of 100, Mailsoftly 54.5 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). Mailsoftly takes its best score on Run from an AI agent and On-brand design, no designer (8 out of 10) and its lowest on Transactional and marketing, one plan (3 out of 10). Mailsoftly does not score higher on any test. Scores are unadjusted, and every Mailsoftly 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. Mailsoftly prices are monthly list prices in US dollars, not the 20% lower yearly rate its page opens on.
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
Mailsoftly sells plans with a contact cap and a send cap. At monthly list prices, Starter is $19 for 1,000 contacts, Basic $49 for 5,000, Business $99 for 15,000 and 150,000 sends, and Premium $199 for 30,000. Above 30,000 contacts it is Enterprise, priced on request. The page opens on yearly billing, 20% lower.
Nitrosend does not cap contacts on any plan, and the bill follows the emails sent. 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 | Mailsoftly |
|---|---|---|
| 10,000 contacts, two campaigns a month (20,000 emails) | Pro, $20 a month (20,000 emails) | Business $99 a month (15,000 contacts) |
| 50,000 contacts, two campaigns a month (100,000 emails) | Ultra, $100 a month (125,000 emails) | Custom pricing above 30,000 contacts |
| 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 | Custom pricing |
| Add transactional email | Counted in the same allowance | Not listed |
A new Nitrosend account 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 Mailsoftly is the better pick
Mailsoftly takes none of the seven tests outright and ties two.
- Extras and support. A tie. Shopify integration with revenue tracking from Basic up, Zapier, free migration from other platforms on paid plans, a 30-day money-back guarantee, and invoicing by purchase order, wire or check for schools, government agencies and finance teams that cannot pay by card, all on its pricing page. Its MCP server also runs SMS campaigns, where texting in Nitrosend is coming soon and its MCP tools run email today.
- The editor. A tie. A drag-and-drop, rich-text or custom HTML editor with AI email designs and templates, per its pricing page.
Its agent setup is one of the most complete among smaller platforms. The hosted MCP server signs in with OAuth, publishes 139 curated tools, and a Mailsoftly admin approves each connection on a consent screen that lists the permissions in plain language. Sending is a separate checkbox that starts unchecked, so without it the agent drafts and a person presses send.
Where that line sits matters as much as whether it exists. In Mailsoftly's tool table, sending a test copy of a campaign needs the same send permission as sending the campaign, scheduling it, starting an A/B test or switching an automation on. A connection without it cannot check its own work in an inbox, and a connection that can send a test can also send the campaign. Nitrosend splits the two. Its test-send tool sends one real email to the addresses given and never approves or sends to an audience, and a campaign or flow goes out only through a separate approve step, which its examples list as one of three separate checks alongside Safe Mode and an all-contacts confirmation.
The first day differs too. Mailsoftly's MCP page says a new account needs a sending channel of its own before it can send, either a connected Google or Microsoft mailbox or an authenticated domain, and every account's first campaigns pass a short content review that no setting speeds up. Sending through a connected mailbox, its pricing FAQ allows the Free plan 70 emails a day, or 150 with Google Workspace or Microsoft 365. Each Nitrosend brand reserves a sender at [email protected] that needs no DNS, as the sending domains guide explains, and a new Free account starts at 100 recipients per rolling 24 hours, rising as it earns standing (pricing). Nitrosend can also hold a new account's first campaign for review.
Nitrosend also differs in what the agent knows. Its documentation describes Claude, GPT and Gemini reaching every Nitrosend feature through its MCP server, and Brand Kit and AI Memory hold the brand's tone, audience and goals as well as its look, so drafts read like the brand. Transactional email comes from the same API. The AI email marketing guide shows the workflow.
Moving from Mailsoftly to Nitrosend
There is no Mailsoftly connector in Nitrosend, so a move runs through an export and the agent.
- Contacts. Export subscribed contacts from Mailsoftly as CSV with lists and tags, and import them in Contacts or through the imports API. A Nitrosend CSV import treats the new contacts it creates as subscribed, so unsubscribed and bounced addresses stay out of the file.
- Consent records. Mailsoftly keeps consent evidence and opt-out records that its MCP tools can read. GDPR Article 7 says a sender relying on consent must be able to demonstrate it, so save a copy of those records before the Mailsoftly account closes.
- Automations. Mailsoftly's MCP server reads each automation's trigger and ordered steps, and the saved templates its email steps send. With both servers connected to one assistant, the agent can read them and rebuild each one as a Nitrosend draft flow with its templates. Neither vendor documents that route; it follows from the two tool lists. Check each flow before approving it.
- Brand. Point Brand Kit at the same website so the agent starts from the same look, then add voice notes to AI Memory.
- Sending. Verify the domain, then send to the most engaged contacts first and grow from there. The domain warm-up guide covers the ramp.
- Receipts. Point the app's receipts and resets at the Nitrosend API. The transactional email section explains how.
Which one to pick
Pick Mailsoftly if the team wants Shopify revenue tracking, wants a migration team to move the account for it, or needs to pay by invoice. Its 30-day money-back guarantee helps too, though its terms on the pricing page say a refund may be refused once bulk campaigns have gone out.
Pick Nitrosend if an agent should write, design and send the email in the brand's voice from the assistant the team already uses, the list is heading past 30,000 contacts, 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 Mailsoftly FAQ
Yes. Mailsoftly Business is $99 a month for 15,000 contacts at monthly list price, and above 30,000 contacts it is custom pricing. Nitrosend charges by emails sent: $20 a month for 20,000 and $100 for 125,000, with unlimited contacts.
Yes. Mailsoftly runs a hosted MCP server with OAuth and 139 tools for contacts, lists, segments and campaigns. Sending is a separate permission you must grant, and sending a test copy needs that same permission.
Yes. Its pricing page lists an AI brand kit built from your website on every plan. Nitrosend's Brand Kit also stores the brand's voice, and AI Memory keeps house style the agent reads before every draft.
Its plans do not list a transactional email service. Nitrosend sends transactional and marketing email from one plan and one API.
Yes, for 500 contacts and 2,000 sends a month. Nitrosend's Free plan sends 8,000 emails to start and then 500 a month, with unlimited contacts.
Add Nitrosend's MCP server at api.nitrosend.com/mcp as a connector in Claude, or in ChatGPT, Cursor or Codex, and sign in with OAuth. Ask it to set up Brand Kit from your website, then describe the campaign. The agent saves it as a draft, can send a real test to your inbox, and the campaign goes out once it is approved.
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.