Nitrosend is the better choice than Sendy on five of the seven things this review compares: running email from an AI agent, on-brand design without a designer, the free plan, sending transactional and marketing email on one plan, and the hands-on editor. Sendy is a self-hosted newsletter app: you buy a $69 license, install it on your own server and send through your own Amazon SES account, which makes it the cheapest way to email a big list if you are willing to run it. Nitrosend is a hosted platform an agent runs from inside Claude, ChatGPT, Cursor or Codex, with sending reputation, warm-up and transactional email handled for you. To set it up, add the Nitrosend MCP server (api.nitrosend.com/mcp) to the assistant and sign in with OAuth, with no API key to paste, as the Claude Code setup guide shows.
Nitrosend vs Sendy, 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 Sendy, side by side
Checked September 25, 2026| Question | Nitrosend | Sendy |
|---|---|---|
| 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. | No. No. Only through its API on your server. |
| Official MCP serverIs there a first-party MCP server for marketing email? | Yes. Yes. Listed as com.nitrosend/nitrosend on the official MCP registry. | No. No. |
| Brand from your websiteDoes it learn your fonts, colors and voice from your website? | Yes. Yes. Brand Kit scans the site, including voice. | No. No. |
| Hosted for youDoes the vendor run the servers? | Yes. Yes. | No. No. You install and run it yourself. |
| Transactional includedAre receipts and resets in the same product as newsletters? | Yes. Yes, on every plan including Free. | No. No. Newsletters and autoresponders only. |
| Free planIs there a free plan? | Yes. Yes. 8,000 emails, then 500 a month, forever. | No. No. |
| Deliverability handledDoes the vendor manage sending reputation and warm-up? | Yes. Yes. Daily limits ramp with sender standing. | No. No. You manage your own SES account. |
| Unlimited contactsCan you store any number of contacts at no extra cost? | Yes. Yes. | Yes. Yes. |
Nitrosend meets 8 of 8 yes-or-no questions on this page, Sendy 1 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. Sendy takes the top mark on cost, and it deserves it.
Each test, scored
Points out of 100, scores out of 10, September 25, 2026| What we compared | Points | Nitrosend | Sendy |
|---|---|---|---|
| Run from an AI agent | 20 | 9 out of 10 | 2 out of 10 |
| On-brand design, no designer | 10 | 9 out of 10 | 4 out of 10 |
| Cost as the list grows | 20 | 9 out of 10 | 10 out of 10 |
| Free plan headroom | 10 | 7 out of 10 | 1 out of 10 |
| Transactional and marketing, one plan | 10 | 9 out of 10 | 2 out of 10 |
| Hands-on editor and templates | 15 | 6 out of 10 | 5 out of 10 |
| Integrations, support, track record | 15 | 5 out of 10 | 5 out of 10 |
| Total score | 100 | 77.5 out of 100 | 46 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 2Sendy
46 out of 100Total
- Priced by
- One-time license plus Amazon SES
- Free plan
- None
- Entry plan
- $69 once, self-hosted
- Run from an AI agent2 out of 10Self-hosted with an API and an AI writing add-on, but no MCP server or connector (Sendy).
- On-brand design, no designer4 out of 10Drag-and-drop editor and an AI template add-on. No brand learning from your website (Sendy).
- Cost as the list grows10 out of 10A $69 one-time license, then Amazon SES at about $1.6 per 10,000 emails, plus hosting (Sendy).
- Free plan headroom1 out of 10No free plan. A paid license you install yourself (Sendy).
- Transactional and marketing, one plan2 out of 10Newsletters and autoresponders only. Receipts and resets need SES or another provider directly (Sendy).
- Hands-on editor and templates5 out of 10Drag-and-drop editor and reports, 4.3 of 5 on G2, with Outdated Design a complaint (G2).
- Integrations, support, track record5 out of 10Zapier integration, several SMTP providers supported, and full control of your own install (Sendy).
The verdict in short
Sendy is only better on one: cost, because a one-time license plus SES at about $1.6 per 10,000 emails, Sendy's own figure, is close to free. The two tie on integrations and support, where Sendy's strength is control: you own the install and can plug it into thousands of apps through Zapier.
At a glance
Nitrosend and Sendy are scored here on the same 7 tests, 100 points in all: Nitrosend 77.5 out of 100, Sendy 46 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). Sendy takes its best score on Cost as the list grows (10 out of 10) and its lowest on Free plan headroom (1 out of 10). Sendy scores higher on Cost as the list grows. Scores are unadjusted, and every Sendy 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. Sendy prices are its one-time license plus Amazon SES sending at the rate Sendy quotes, before server hosting.
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
Sendy costs $69 once, for one domain, and updates are free up to the next major version (Sendy's FAQ gives 7.x and 8.x as the steps). Sending runs through your own Amazon SES account, which Sendy puts at $1.6 per 10,000 emails, and there is no charge for contacts. The catch is everything else: a server to host it, setting up and warming SES yourself, and handling bounces, complaints and updates. Sendy sells an installation service for people who would rather not.
Nitrosend's paid plans start at $20 a month for 20,000 emails, with unlimited contacts, as the Nitrosend pricing page sets out. The difference is that the domain setup, sending reputation, daily ramp and delivery safety checks are part of the product. What email marketing actually costs looks at the trade-off between cheap sending and managed sending.
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 | Sendy |
|---|---|---|
| 10,000 contacts, two campaigns a month (20,000 emails) | Pro, $20 a month (20,000 emails) | About $3.20 a month in SES, after the $69 license |
| 50,000 contacts, two campaigns a month (100,000 emails) | Ultra, $100 a month (125,000 emails) | About $16 a month in SES |
| 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 | About $32 a month in SES |
| Add transactional email | Counted in the same allowance | Not part of Sendy |
The SES figures above leave out hosting, which for a small server is usually a few dollars a month more. 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 Sendy is the better pick
Sendy takes one of the seven tests outright and ties another.
- Cost. Nothing in this category is cheaper for a large list than a one-time license and raw SES pricing. One sender quoted on Sendy's site puts around a million newsletter emails a month through SES and calls it "a huge cost saving".
- Control. A tie on the integrations test. You own the install and the data, and Sendy's site lists native support for several SMTP providers besides SES and a Zapier integration that reaches thousands of apps.
The trade is work, and for an agent the API only runs one way. Sendy's API has eight methods: five for subscribers, one each to fetch brands and lists, and one to create and send a campaign. None of them returns a campaign's opens, clicks or bounces, which stay in the web app's reports, so an agent can send through Sendy but cannot read back how the send did before it plans the next one. The same page notes that a campaign created through the API only goes out if a cron job is running on the server, which the agent has no way to check. Sendy is a PHP application you install, update and secure yourself, its 42 reviews on G2 mention outdated design, and there is no MCP server. Its AI Assistant works inside Sendy on an OpenAI or Claude key pasted into each brand's settings, as Sendy's setup notes describe.
Nitrosend is the managed, agent-first version of the same idea, and it closes that loop in the same chat. Its MCP tools include nitro_get_insights, for campaign analytics with trends and benchmarks, and nitro_query, for past campaigns, messages and suppressions, both listed in the setup guide. An agent can check how the last send did before it drafts the next. It runs inside the assistant you already use, including as an app inside ChatGPT, and Brand Kit gives the agent the brand's logo, colors, fonts and voice. The AI email marketing guide shows the workflow.
Moving from Sendy to Nitrosend
Sendy has no Nitrosend connector, but its lists export cleanly.
- Subscribers. Export each Sendy list as CSV with custom fields, and import them in Contacts or through the imports API. Bring consent status across, because only subscribed contacts should be sendable.
- Autoresponders. Describe each Sendy autoresponder to the agent and it rebuilds it as a flow. Check each one before it goes live.
- Sending. Verify the domain in Nitrosend and ramp up, sending to the most engaged subscribers first. Reputation belongs to the sending domain, so plan the ramp even if SES was warm. The domain warm-up guide covers it.
- Transactional. Receipts and resets that went straight through SES can move to the Nitrosend API on the same plan. The transactional email section explains how.
- Keep SES if you like. Nitrosend's default sender already runs on SES. On paid plans you can connect your own SES account instead, which keeps your quotas, your reputation and your region, while Nitrosend handles composing, audiences, automation, tracking and suppression, as the SES setup docs explain.
Which one to pick
Pick Sendy if the lowest possible bill matters most, someone on the team is happy to host, update and secure a PHP app and run an SES account, and email is sent by hand from a simple editor.
Pick Nitrosend if an agent should write, design and send the email from the assistant the team already uses and read the results before the next send, nobody wants to run a server or manage sending reputation, 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 Sendy FAQ
Yes. Sendy is a $69 one-time license plus Amazon SES at about $1.6 per 10,000 emails, before hosting. Nitrosend is free to start and $20 a month for 20,000 emails, with sending reputation and warm-up managed for you.
No. Sendy has an API on your own install and an optional AI assistant for writing templates, but no MCP server or connector for Claude or ChatGPT, and no API method that returns a campaign's results.
Add the Nitrosend MCP server (api.nitrosend.com/mcp) in Claude and sign in with OAuth. Import the lists exported from Sendy as CSV in Contacts or through the imports API, then ask Claude for the campaign and it drafts it in your Brand Kit. Campaigns stay drafts until approved, a single transactional email sends on the call, and after a send Claude can read the results with nitro_get_insights. The same server works in ChatGPT, Cursor and Codex.
Yes. Nitrosend's Pro, Ultra and Enterprise plans let you bring your own sending keys, including Amazon SES, SendGrid, Resend, Mailgun and Postmark.
No. Sendy sends newsletters and autoresponders to lists. Receipts and password resets go through SES or another provider directly.
No. Nitrosend is hosted. You connect it to your assistant and verify a sending domain.
Sending reputation belongs to the domain. Verify it, send to the most engaged subscribers first, and let the daily limit ramp. This review does not score deliverability, because neither product publishes a comparable inbox-placement number.