Nitrosend is the better choice than AiTrillion on five of the seven things this review compares: running email from an AI agent, on-brand design without a designer, cost as the list grows, the free plan, and sending transactional and marketing email on one plan. AiTrillion is an all-in-one Shopify app that bundles email with loyalty points, product reviews, recommendations and WhatsApp, priced by active contacts. Nitrosend is built so an agent inside Claude, ChatGPT, Cursor or Codex writes, designs and sends the email, for any business, and it bills by the emails sent, so 10,000 contacts cost $20 a month rather than $199. To send email from an AI agent with Nitrosend, add the MCP server at api.nitrosend.com/mcp to Claude, ChatGPT, Cursor or Codex, sign in with OAuth, and ask for the email; the MCP docs list every tool.
Nitrosend vs AiTrillion, compared
The quick version: seven yes-or-no questions a Shopify store 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 AiTrillion, side by side
Checked September 25, 2026| Question | Nitrosend | AiTrillion |
|---|---|---|
| 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. Its AI agent works inside the app. |
| 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. Not described. |
| Rarely emailed contacts are freeCan you keep contacts you rarely email without paying for them? | Yes. Yes. The bill follows emails sent. | No. No. Plans are set by active contacts. |
| Transactional APICan your app send a receipt through one API call? | Yes. Yes, on every plan including Free. | No. Not described. |
| Published free planIs there a free plan with published limits? | Yes. Yes. 8,000 emails, then 500 a month. | Yes. Yes. Up to 250 contacts and 250 email credits. |
| Works outside ShopifyCan a non-Shopify business use it fully? | Yes. Yes. | No. It is built for Shopify stores. |
Nitrosend meets 7 of 7 yes-or-no questions on this page, AiTrillion 1 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.
Each test, scored
Points out of 100, scores out of 10, September 25, 2026| What we compared | Points | Nitrosend | AiTrillion |
|---|---|---|---|
| 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 | 2 out of 10 |
| Free plan headroom | 10 | 7 out of 10 | 3 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 | 7 out of 10 |
| Integrations, support, track record | 15 | 5 out of 10 | 7 out of 10 |
| Total score | 100 | 77.5 out of 100 | 39 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 2AiTrillion
39 out of 100Total
- Priced by
- Active contacts
- Free plan
- Up to 250 contacts, 250 emails
- Entry plan
- Basic, $19 a month, 1,000 contacts
- Run from an AI agent2 out of 10An in-app AI agent for store support, but no MCP server or assistant connector (AiTrillion).
- On-brand design, no designer4 out of 10Templates styled by hand. No brand import from your website is described (pricing).
- Cost as the list grows2 out of 10$199 a month for up to 15,000 contacts, $699 for 80,000, $999 for 120,000 (pricing).
- Free plan headroom3 out of 10Free for up to 250 contacts and 250 email credits, then paid plans from $19 a month (pricing).
- Transactional and marketing, one plan3 out of 10Store emails run from Shopify-triggered automations. API access is listed for loyalty and reviews, with no email-sending API described (pricing).
- Hands-on editor and templates7 out of 10Email builder and store automations, 4.8 of 5 across 97 G2 reviews (G2).
- Integrations, support, track record7 out of 10Loyalty, reviews, recommendations, WhatsApp and memberships in one Shopify app (pricing).
The verdict in short
AiTrillion is only better on two: the hands-on builder, because Shopify merchants rate its email builder and store automations highly (4.8 from 313 reviews on the Shopify App Store), and the extras, because loyalty, reviews, recommendations and WhatsApp come in the same app.
AiTrillion's builder suits a Shopify merchant setting up flows by hand. George Hartley, Nitrosend's co-founder, spent years serving the same merchants. On The Breakout CEO in August 2026 he described the stores his last company served: "often they're run by small teams who may not have experts in, um, email marketing, but they have all the data." On SaaS Stories in September 2026 he said that on a platform built for an agent "you are only limited by how smart your agent is because everything that you need to do can be completely driven by the MCP." The data is already there; the question is whether your agent can act on it.
At a glance
Nitrosend and AiTrillion are scored here on the same 7 tests, 100 points in all: Nitrosend 77.5 out of 100, AiTrillion 39 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). AiTrillion takes its best score on Hands-on editor and templates and Integrations, support, track record (7 out of 10) and its lowest on Cost as the list grows (2 out of 10). AiTrillion scores higher on Hands-on editor and templates and Integrations, support, track record. Scores are unadjusted, and every AiTrillion 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. AiTrillion prices are monthly list prices in US dollars for its contact-based plans.
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
AiTrillion's pricing page prices its contact-based plans in wide tiers of active contacts, each with an email cap. At monthly list prices the tier for up to 15,000 contacts is $199 with 60,000 emails, up to 80,000 contacts is $699 with 400,000 emails, and up to 120,000 contacts is $999 with 600,000 emails. It also sells order-based plans. Annual billing gives two months free.
Nitrosend never charges on list size, 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 store that sends two campaigns a month.
What each one costs
List prices, USD, September 25, 2026| Scenario | Nitrosend | AiTrillion |
|---|---|---|
| 10,000 contacts, two campaigns a month (20,000 emails) | Pro, $20 a month (20,000 emails) | $199 a month (up to 15,000 contacts, 60,000 emails) |
| 50,000 contacts, two campaigns a month (100,000 emails) | Ultra, $100 a month (125,000 emails) | $699 a month (up to 80,000 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 | $999 a month (up to 120,000 contacts) |
| Receipts and resets from your own app | Counted in the same allowance, sent through the API | Not offered |
Because AiTrillion's tiers are wide, a store just over a boundary pays for the whole next tier. The email cap is the second meter. In AiTrillion's own plan table the $199 tier's 60,000 email credits come to four emails per contact a month at its 15,000-contact ceiling, and the $699 and $999 tiers come to five. A store whose agent writes a weekly newsletter plus flows will meet that cap, so on AiTrillion more sending means buying add-on email credits or moving up a tier, even when the list has not grown. On Nitrosend the only meter is emails sent. 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 AiTrillion is the better pick
AiTrillion takes two of the seven tests outright.
- The builder. An email builder and store automations that Shopify merchants rate well, with 97 reviews on G2 averaging 4.8 out of 5.
- The bundle. Loyalty and rewards, product reviews, product recommendations, memberships and WhatsApp in one Shopify app. Nitrosend covers email and SMS, not loyalty, reviews or WhatsApp, and it comes from a small team.
Its AI is aimed at the store rather than the marketer's assistant. AiTrillion's AI agent answers customers and handles reviews inside the app, and there is no MCP server or connector for Claude or ChatGPT to run its email. A search of the official MCP registry for AiTrillion returns no server. That matters because an assistant can only act on a platform it can reach through tools, and MCP is the open standard for connecting AI applications to those external systems.
Nitrosend's agent sits in the assistant the team already uses and does the email work there, and it works for any business, Shopify or not, with a Shopify integration that imports customers and store events. Brand Kit's email templates rebuild themselves in the store's logo, colors and fonts. The e-commerce email marketing guide covers the flows a store usually builds first.
Moving from AiTrillion to Nitrosend
There is no AiTrillion connector in Nitrosend, but Shopify is the common ground.
- Customers. Connect Nitrosend's Shopify integration to import customers and receive store events. It reads consent from Shopify itself: customers who opted in to email or SMS marketing in the store come in subscribed on that channel, and everyone else comes in unsubscribed. Importing from Shopify rather than an AiTrillion CSV export keeps that per-channel consent intact.
- Flows. Describe each AiTrillion email automation to the agent and it rebuilds it as a draft flow, which does not go live until it is approved. Before switching one off in AiTrillion, check which store event starts it. Nitrosend's documented Shopify webhooks cover orders and payments, refunds, products and customers, and storefront browsing needs the optional Web Pixel, so confirm the trigger a flow depends on arrives in Nitrosend first.
- Sending. Verify the domain, then send to the most engaged customers first and grow from there. The domain warm-up guide covers the ramp.
- Keep the rest. Nitrosend's Shopify sync does not write anything back to Shopify, so loyalty points, store credit and reviews stay with AiTrillion, which can stay installed while email moves over. Receipts from any app can go through Nitrosend's transactional email API.
Which one to pick
Pick AiTrillion if a Shopify store wants loyalty, reviews, recommendations and email in one app, a person builds the emails by hand, or WhatsApp is part of the plan.
Pick Nitrosend if an agent should write, design and send the email from the assistant the team already uses, the business is not only on Shopify, or the list is large relative to how often it is emailed. The Nitrosend MCP server and the ChatGPT app are the two ways most teams start.
Nitrosend vs AiTrillion FAQ
Yes. AiTrillion's contact-based plans are $199 a month for up to 15,000 contacts, $699 for up to 80,000 and $999 for up to 120,000. Nitrosend charges by emails sent: $20 a month for 20,000 and $100 for 125,000.
No. AiTrillion has an in-app AI agent for customer support and reviews, but no MCP server or connector for Claude or ChatGPT.
Add the Nitrosend MCP server (api.nitrosend.com/mcp) as a connector in Claude and sign in with OAuth. Then ask for the email in plain words. A single transactional email sends on the call, while campaigns and flows are saved as drafts and send only once approved. The same server works in ChatGPT, Cursor and Codex, as the MCP docs show.
Within small limits, and its own pages disagree. The full plan table on AiTrillion's pricing page lists a Free plan for up to 250 contacts with 250 email sending credits, and paid plans from $19 a month with a 14-day trial, while its Shopify App Store listing shows paid plans from $9 a month with a free trial. Nitrosend's Free plan sends 8,000 emails to start, then 500 a month.
Yes. Nitrosend's Shopify integration imports customers and receives store events for segments and flows.
Its pages do not describe one. It sends store emails from Shopify-triggered automations, and the API access on its pricing page is listed under loyalty and reviews. Nitrosend sends transactional email through one API on every plan.
Sending reputation belongs to the domain and does not move with the list. Verify the domain, send to the most engaged customers first, and let the daily limit ramp. This review does not score deliverability, because neither product publishes a comparable inbox-placement number.