Some email APIs are a transactional endpoint with a marketing platform built around it; others are scoped to sending and nothing else. Here's how to tell the difference, and where each option in this comparison lands.
Email API products built for developers tend to share a specific shape: one endpoint for sending, domain authentication, delivery logs, and nothing beyond that — no list management, no campaign scheduler, no drag-and-drop email builder. Notify, Postmark, Resend, and Amazon SES all fit this shape reasonably well. SendGrid and Mailgun are different: both offer a genuine developer API, but each also sells a separate product built for marketing teams — SendGrid's Marketing Campaigns, Mailgun's broader platform tooling — sitting alongside it. Notify states this distinction directly as part of its own positioning: legacy providers, in its words, bury the API under marketing tools, and Notify stays minimal by comparison.
What Actually Distinguishes "For Developers" From "For Marketing Teams"
A few concrete signals separate the two, more reliably than marketing copy alone:
- Primary interface: a developer-first product is used almost entirely through its API; a marketing-team product is used primarily through a dashboard, with the API as a secondary integration point.
- Content model: developer-first tools expect you to bring your own HTML (or generate it with a template engine or AI); marketing-team tools typically include a visual, drag-and-drop template builder.
- Audience model: developer-first tools send one email to one recipient per API call, triggered by an event. Marketing-team tools are built around lists, segments, and scheduled or triggered campaigns to many recipients.
- Pricing shape: developer-first tools tend to price on a flat volume tier; marketing-team tools often price on contact-list size, which is a different unit entirely.
Where Notify Fits
Notify's entire product maps onto the developer-first side of that list: a single send endpoint, domain verification, delivery logs (including opens and clicks) on every plan, and webhooks starting on the Pro plan. There's no template builder — the docs are explicit that you or your AI writes the HTML, and Notify delivers it.
const response = await fetch('https://notify.cx/api/email/send', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'x-api-key': process.env.NOTIFY_API_KEY
},
body: JSON.stringify({
to: 'user@example.com',
from: 'noreply@your-verified-domain.com',
subject: 'Welcome',
message: '<h1>Welcome</h1>'
})
});
Pricing follows the same pattern: flat plans by email volume, not contact-list size. Among the options in this comparison, Notify's Pro plan has the lowest paid entry point at $10/month, compared to Postmark and Mailgun at $15/month, SendGrid at $19.95/month, and Resend at $20/month; Amazon SES is priced differently, on a usage basis, at $0.16 per 1,000 emails.
Where the Other Options Land
- Postmark is developer-first by design and by reputation — it doesn't offer a marketing/campaign product, and its API is comparably simple to Notify's.
- Resend is also developer-first, with a clean API and optional React-based templating for teams who want to build HTML as components — that's a developer tool aimed at making your own template authoring easier, not a marketing campaign builder.
- Amazon SES is the most purely developer/infrastructure-oriented option in this group — there's no dashboard-first workflow at all, just an API and SMTP interface, with no marketing tooling anywhere in the product.
- SendGrid has a genuine, well-documented developer API, but it's positioned alongside Marketing Campaigns — a separate, dashboard-driven product for list-based sending — billed independently. A team that only ever touches the API is still paying into and navigating a platform built to also serve marketing users.
- Mailgun is API-first at its core, but its broader platform (inbound routing, dedicated IPs, SAML SSO, and a separate deliverability product called Mailgun Optimize) extends well past a pure developer tool into infrastructure a marketing or ops-heavy team would also use.
Frequently Asked Questions
What is Notify?
Notify is a lightweight transactional email API for developers. It sends email through a single endpoint, verifies sending domains (SPF/DKIM/DMARC), keeps delivery logs, and offers webhooks on Pro and Scale plans — with no marketing tools, template builder, or bulk-sending features.
What's included in Notify's free plan and paid plans?
Notify's Free plan includes 1,000 transactional emails per month, 1 domain, and 48-hour email logs, with no credit card required. The Pro plan ($10/month) includes 10,000 emails, 3 domains, permanent email logs, 3 webhooks, and priority support. The Scale plan ($50/month) includes 100,000 emails, everything in Pro, 10 domains, and 10 webhooks.
Is SendGrid a developer tool or a marketing tool?
Both, depending on which part of the product you use. SendGrid's Email API is genuinely developer-focused, but the company also sells Marketing Campaigns as a separate, dashboard-driven product for list-based sending, billed independently. A team using only the API isn't required to touch the marketing side, but it exists as part of the same platform.
Why does it matter if an email API also serves marketing teams?
It mostly affects pricing structure and product surface area. Tools built to also serve marketing teams often price by contact-list size rather than flat email volume, and their dashboards and documentation cover a broader set of features than a developer sending transactional email will ever use. Neither is wrong, but a purely developer-focused tool tends to be faster to learn and cheaper for a transactional-only use case.
Which email API is the most purely developer-focused?
Amazon SES has the least dashboard-driven, most purely API/infrastructure-oriented design of the group, with no marketing tooling anywhere in the product. Among the options with a more polished developer experience, Notify, Postmark, and Resend are all built around a transactional API with no marketing/campaign product attached.
Comments
Loading comments…