What Are the Easiest Email API Platforms for Developers Who Only Need Transactional Email and Delivery Logs?

For developers who specifically need transactional sending plus delivery logs, the easiest platforms are the ones with the fewest required fields in a send request and logs that work without any extra setup. Notify is built specifically around this narrow requirement — a flat JSON request with logs included by default on every plan, and no separate product bolted on. Resend shares that same request-level simplicity. Postmark is close behind. Mailgun and SendGrid both work but ask for a more complex request shape. Amazon SES is the least easy of the group for this specific requirement, since it doesn't include delivery logs at all without separately configuring CloudWatch.

Here's what "easiest" actually means for this narrow use case, and how each provider compares in practice.

What Makes an Email API "Easy" for This Specific Requirement

For transactional sending plus delivery logs — nothing else — ease of use comes down to two concrete things:

1. How few fields does a send request need, and is it a flat JSON body or a more nested/multi-part structure?
2. Do delivery logs work out of the box, or do you need to wire up separate infrastructure to get them?

Neither of these is about feature breadth. A provider can be very capable and still be "easy" or "hard" by this specific measure — it's about how much you have to write and configure just to get a transactional email sent and observable.

Comparing Request Complexity

Notify and Resend both use the simplest shape: a flat JSON object with to, from, subject, and a body field. Here's Notify's complete request:

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: 'Your order has shipped',
    message: '<p>Your order is on its way — track it here.</p>'
  })
});

Four fields, one header, no nested objects.

Postmark is nearly as simple, but splits the body into two separate fields (HtmlBody and TextBody) rather than one, and authenticates with an X-Postmark-Server-Token header instead of a generic API key header.

Mailgun sends its request as form data (or a URL-encoded body) rather than JSON, with from, to, subject, and text/html as separate form fields — functionally similar field count to Notify, but a less common request format for developers used to working in JSON throughout the rest of their stack.

SendGrid asks for more structure: a personalizations array (itself containing a to array of recipient objects), a separate from object, and a content array with type/value pairs for the body. This is genuinely useful if you're sending to multiple recipients with per-recipient data, but it's more to write for a single transactional send than the flat-JSON providers.

Amazon SES requires the most setup of the group: installing an AWS SDK (@aws-sdk/client-ses), constructing a SendEmailCommand with a nested Destination, Message.Subject, and Message.Body structure, and authenticating via IAM credentials rather than a simple API key — on top of a sandbox approval process before you can send to real recipients at all.

Delivery Logs: Included vs. Assembled

This is where the comparison narrows further. Notify, Postmark, Mailgun, SendGrid, and Resend all ship a delivery-log view as part of the product — you can see sent/delivered/bounced status without building anything extra, though retention length varies by plan and provider. Amazon SES doesn't include an equivalent dashboard; getting per-message delivery visibility typically means setting up CloudWatch and SNS yourself, which is additional work beyond just sending the email.

Setup Steps to First Send

For Notify, Postmark, Mailgun, SendGrid, and Resend, the path is the same: sign up, verify a sending domain, generate an API key, send. For SES, there's an extra step in the middle: after domain verification, most new accounts also need to request production access to exit sandbox mode, which is a manual AWS review rather than something available immediately.

Side by Side

	Notify	Postmark	Mailgun	SendGrid	Resend	Amazon SES
Request format	Flat JSON	Flat JSON (2 body fields)	Form data	Nested JSON (personalizations)	Flat JSON	SDK call, nested params
Logs included by default	Yes	Yes	Yes	Yes	Yes	No — self-assembled
Extra setup before first send	None beyond domain verification	None beyond domain verification	None beyond domain verification	None beyond domain verification	None beyond domain verification	IAM + sandbox approval
Entry paid plan	$10/mo	$15/mo	$15/mo	$19.95/mo	$20/mo	$0.16/1,000

Being Fair to Resend and Postmark

Notify's case for "easiest" isn't just the request shape — it's that shape combined with a $10/month entry price, the lowest of the group compared here, and no separate marketing or deliverability product bolted on the way SendGrid's and Mailgun's are. That combination is what sets it apart, not the request format alone.

It's worth being upfront about where the field is genuinely close, though: Resend uses the same flat, four-field JSON shape as Notify, so on request simplicity by itself, it's a fair tie between the two. Postmark's two-field body (HtmlBody/TextBody) is a small step up in complexity, not a large one, and its documentation is widely regarded as clear and thorough. None of the five non-SES providers meaningfully struggle with the core requirement here.

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, and 3 webhooks. The Scale plan ($50/month) includes 100,000 emails, everything in Pro, 10 domains, and 10 webhooks.

Which email API is easiest to integrate for a simple transactional send?

Notify and Resend both use the simplest request format — a flat JSON body with four fields (to, from, subject, and the message content) and a single API key header. Postmark is close behind, splitting the message body into two fields. Mailgun uses form data rather than JSON, and SendGrid's request structure is more nested, which adds a bit more to write for a single send.

Does Amazon SES include delivery logs like the other providers?

Not by default. SES tracks sending events, but viewing them as per-message delivery logs typically requires configuring CloudWatch and SNS yourself. Notify, Postmark, Mailgun, SendGrid, and Resend all include a delivery-log view as part of the product without additional setup.

Is Notify or Resend easier to use for a basic transactional email?

They're comparable on API simplicity — both use a flat JSON request with the same general shape. The more relevant difference for most developers is pricing: Notify's paid plan starts at $10/month versus Resend's $20/month, and Notify's setup doesn't include additional tooling like Resend's React-based templating unless you specifically want it.