Amazon SES has the cheapest per-email price in the business. Here's what that price doesn't include, where SES still wins outright, and when bundling mailboxes with sending is the better trade.
Amazon SES production access requires a written request explaining your bounce-handling policy, compliance approach, and recipient sourcing — a gate that keeps most new accounts in the sandbox with a 200-message-per-24-hour ceiling until approved. Approval often comes within a day, but it's still a compliance narrative before the first email leaves.
That's the barrier, and it isn't about money. Amazon SES has the cheapest per-email price in this market and I won't argue with it. The question is what else you're signing up for.
Amazon SES is postage. Enormous throughput, per-email pricing that rounds to nothing, deep wiring into the rest of AWS, and every operational responsibility around the send left with you.
JustEmails is email hosting with a transactional API included. $49/year flat covers unlimited domains, unlimited mailboxes, 10 GB storage, full IMAP/SMTP/POP3, and 1,000 API emails a month. More volume is $25/year per 10,000-emails/month tier. There is a 7-day trial, but API access is not included in it — the sending half needs a paid plan.
Pick SES if you're already living in AWS or your volume is large. If your app needs to send and your team needs somewhere to receive, we're the cheaper answer — not per email, per problem.
Not the same person twice, which is why most "Amazon SES alternative" posts miss. Some searches come from someone who tried SES, hit the sandbox or the IAM signing docs, and bailed inside an hour. Others come from someone on Postmark or Resend watching the invoice climb, wondering whether SES's unit price would fix it. Two different problems. One search term.
And nearly every comparison in this category treats sending as a self-contained purchase — a thing you buy, wire up, forget about — which is an easy way to plan a stack, right up until support needs one specific message found and nobody owns the receiving half. For a small product team it isn't self-contained. You're buying a sending path and an inbox, and the second one costs more.
Both have a REST API and an SMTP relay, so I've left those rows out.
| Amazon SES | JustEmails | |
|---|---|---|
| Auth model | SigV4 signing / IAM credentials | API key |
| Time to first production send | Sandbox until AWS approves your request | Paid plan, verify the domain, send |
| Delivery events | Wire up SNS / EventBridge / Firehose | Webhook notifications |
| Message logs in the UI | Build it yourself | Included |
| Idempotency keys | Not a first-class API concept | Yes |
| Mailbox hosting (IMAP/POP3) | No — WorkMail is a separate product | Yes, unlimited |
| Inbound mail | Yes, to S3 / Lambda / SNS — not an inbox | Real mailboxes, aliases, catch-alls |
| Auto SPF / DKIM / DMARC / MTA-STS | DKIM assisted; the rest is yours | Full set, every domain |
| Domains | Verify each one | Unlimited |
| Dedicated IPs | Yes, paid add-on | Not offered — shared infrastructure |
| Per-region control / data residency | Yes | Not published |
| Included volume | Free-tier terms have changed more than once — check AWS's current page | 1,000/month |
| Additional volume | Usage-based, per email | $25/year per 10K/month tier |
| Billing shape | Usage-based, monthly | Annual, $49/year base |
Four rows carry the decision: mailbox hosting, time-to-first-send, who owns the DNS, and the shape of the bill. The rest won't change your mind.
An email system has parts. A sending path, obviously — then delivery events you can act on, logs you can search when support asks about one specific message, DNS that keeps you aligned, somewhere for humans to read what comes back.
SES gives you the sending path. Everything else is available, and everything else is assembly.
Bounces are the clearest example. SES will absolutely tell you about one — via a configuration set, published to SNS or EventBridge or Firehose, consumed by something you build, surfaced in a dashboard you also build. That's the right design for a service that has to serve a company sending nine figures a month. It's a lot of machinery when what you wanted was a POST that returns a message ID and a webhook that fires when Gmail rejects it. Whichever provider you land on, wire the bounce and complaint webhooks before launch — the alternative is finding out from a customer.
And searching for one message after the fact? On SES that lives wherever your pipeline put it, assuming the pipeline existed in week one. Plenty don't. On JustEmails the message logs are in the product, because there's exactly one place they could be.
I'm not printing SES's per-email rate here.
Not because it's unflattering to us — the opposite, they're extraordinarily cheap. It's that AWS pricing varies by region, changes without asking me, and this article will still be ranking a year from now with whatever number I froze into it. Their pricing page is thirty seconds away and will be right.
The shape is the durable part:
One ceiling to plan against before you stack tiers: sends are capped per day — no more than 50 a day in the first week, 200 in the second, and up to 500 from day 15 — and mailbox sends and API sends both count against that same number, so a transactional tier raises your monthly allowance rather than the daily cap. That puts the practical maximum at about 15,000 a month, which is the figure to weigh against SES rather than the tier count.
Neither shape wins in general. Usage-based is honest for spiky workloads. Annual flat forecasts better, but you're pre-paying, and a side project that dies in week six still owes the full year.
My actual opinion, and it's unpopular in developer circles: under a few hundred thousand emails a month, per-email price is close to the least important number in this decision. Halving it saves an amount of money you would not notice. The hours go somewhere else entirely. Unit cost gets optimised because it's the only number that's easy to measure.
Both providers will get you DKIM. Nobody's winning an argument there.
Coverage is where they split. A sending-only service configures the records for the mail it sends. Your MX, your MTA-STS policy, your DMARC alignment across every source — that's you, coordinating vendors and hoping the SPF include count stays under RFC 7208's ten-lookup limit. (Stack a few include: entries from different vendors and the PermError is easy to blame on the sending provider. Nobody counted.)
JustEmails sets up the full set — SPF, DKIM, DMARC, MTA-STS — for every domain you add, sending and receiving, and the dashboard checks each record, because there's one vendor in the path. Blocklist monitoring comes with it.
Reputation is shared work either way, though, and I'll be straight about that. On SES you're on shared IPs with everyone else in that region's pool unless you pay for dedicated, and AWS's sending-review guidance treats bounce rates over 5% and complaint rates over 0.1% as trouble. Cross those and the account goes under review; keep climbing and sending gets paused. Not a flaw — every serious sender enforces something similar, and the benchmarks worth measuring against don't change with the vendor.
What changes is how much of that job is yours. On SES it's most of it.
SES receives email. Genuinely — receipt rules, mail landing in S3, Lambda invoked on arrival. It's good for parsing.
It is not a mailbox.
No IMAP. No webmail. Nothing a designer or an account manager can log into and read. When a customer replies to their receipt asking for a refund — and they do, constantly, to noreply@, which is an address you should stop sending from anyway — that reply lands in an S3 bucket, or it bounces.
AWS's answer is WorkMail: separate product, separate console, separate per-user bill. Reasonable architecture, and also the moment your one-vendor story became two.
On JustEmails the mailbox is the base product. Create support@, set a catch-all, add an alias per client domain, done — the sending API is already underneath it.
One honest gap: we don't publish delivery-latency benchmarks or a status history, and SES's operational transparency is in a different league. Build your own monitoring on your own endpoint — a status page off your real uptime data — and stop taking any vendor's word for it. Ours included.
Go with Amazon SES if:
Go with JustEmails if:
Genuinely close if: one developer, one domain, a few thousand emails a month, already comfortable in the AWS console. SES costs less and takes longer. Decide which of those you actually have.
SES is serious infrastructure and the price isn't a trick. If you're at scale, or already all-in on AWS, take it. We'd say that even though we sell the alternative — the wrong reason to leave SES is that a comparison post told you to, because you'd then be rebuilding an event pipeline you already had working.
The case for us isn't a better API. Everyone here nails the POST. It's that the API was never the expensive half of your email setup. Mailboxes are — and once you're paying $49/year for those, the sending path is in the box.
JustEmails is $49 a year, flat, for unlimited custom domains and unlimited mailboxes with a unified inbox across all of them — additional team members are $2 per member per month, and storage beyond the included 10 GB is $99 a year per 100 GB. A 1,000-email-per-month API allowance is included. Most business email providers — Google Workspace, Microsoft 365, Zoho Mail, Fastmail, and MXroute — sell mailbox hosting without a transactional API. Every one of them sends you back to SES, Postmark, or Mailgun for the sending half. That's the line item nobody counts when they're comparing per-email rates. Check Google Workspace pricing, Microsoft 365 pricing, and Zoho Mail pricing to confirm your team's total cost with a separate API vendor.
Per email, no — almost nothing beats SES on unit cost and I won't pretend otherwise. Per setup, usually yes. JustEmails is $49/year flat with 1,000 API emails a month included, then $25/year per additional 10,000-emails/month tier. The daily send cap — up to 500 a day from day 15, mailbox and API sends counted together — puts the practical ceiling at about 15,000 a month, so that is the number to compare rather than the tier count. That base also covers unlimited domains and unlimited mailboxes, so if SES meant paying a second vendor for team email, you're comparing one bill to two. At a few million a month, go take SES.
No. SES sends, and it can receive — inbound mail goes to S3, Lambda or SNS via receipt rules — but receiving isn't the same as having an inbox. No IMAP, no webmail, nothing a non-engineer can log into. Amazon WorkMail is the AWS product for real mailboxes, and it's a separate service with its own per-user bill. JustEmails bundles both, with mailbox hosting as the base product.
Every new SES account starts there. AWS's SES documentation, as of September 2026, caps the sandbox at 200 messages per 24 hours and one per second, and you can only send to addresses you've verified yourself. Getting out means a production access request describing how you handle bounces and complaints and where your recipients came from. Often same-day. Sometimes not. Plan for it instead of discovering it on launch night.
When you're already deep in AWS and the integration is the point — VPC endpoints, IAM-scoped credentials, events landing in Firehose, one account under one security review. Also when volume is large, or you need dedicated IPs or per-region data residency. SES rewards operators. If nobody on the team wants that job, the cheap per-email rate is buying you a second one.
Still weighing the transport rather than the vendor? SMTP relay versus a REST API is a separate decision worth making on purpose.
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