Resend vs Amazon SES for SaaS transactional email

Choosing between Resend and Amazon SES for SaaS transactional email is a slightly different comparison than most, because Resend publicly runs on top of Amazon SES infrastructure. You are not choosing between two competing sending engines. You are choosing between raw AWS infrastructure that you assemble yourself, and a managed API, SDK, and template layer built on that same infrastructure. The honest answer depends on whether your team has the engineering time to own bounce handling, suppression lists, and templating, or would rather pay for that layer to already exist. This is the comparison written to be fair to both, because picking the wrong one for the wrong reason is the expensive mistake.

The real question: build it yourself or pay for it built.

Amazon SES is infrastructure, priced like infrastructure: about $0.10 per 1,000 emails, plus attachment costs and $24.95 a month per dedicated IP if you want one. It is one of the cheapest ways to send email at scale that exists. What it does not include is a developer friendly API layer, a templating UI, or automatic bounce handling. You build those yourself, or you use a service that already built them.

Resend is one of the services that already built them, and it has publicly acknowledged that it runs on Amazon SES under the hood. Resend launched in 2023 with a TypeScript first API, React Email for writing templates as components, and SDKs for Node, Python, Ruby, Go, Elixir, and PHP. So the framing that helps: SES is the engine, and Resend is a finished car built on that engine, with a dashboard, warranty, and customer support included. Both are legitimate choices. The decision is about who does the assembly work.

Developer experience: an API you call versus infrastructure you configure.

Resend's workflow is close to as simple as transactional email gets: install the SDK, call send, and the API key, webhook signing, and template rendering are already wired up. React Email lets you write and preview templates as components in your own codebase, version controlled like the rest of your app.

Amazon SES starts in sandbox mode, which restricts you to sending only to verified addresses until you submit a production access request and AWS approves it. There is no templating UI. SES templates exist, but only through the API, so you either build your own rendering layer or hand code every email body. Configuration Sets let you publish detailed event data to SNS, Kinesis, or CloudWatch, which is powerful but requires you to design the pipeline that consumes it. None of this is hard for a team that already lives in AWS, but it is real work compared to an API that already does it for you.

If your team wants to ship email quickly without becoming the owner of that plumbing, Resend removes the work. If your team already has AWS expertise in house and wants full control over the pipeline, SES gives you that control at the cost of building it yourself.

Bounce handling, suppression, and the parts nobody enjoys building.

This is the area where the choice matters most in practice. On Amazon SES, you are responsible for subscribing to bounce and complaint notifications through Amazon SNS, parsing them, and maintaining your own suppression list so you stop emailing addresses that bounce or complain. Skip this and your sender reputation degrades quietly until deliverability collapses, often before anyone notices why.

Resend handles bounce and complaint processing as part of the managed layer, along with webhooks that carry signed JSON payloads for every event, so you can react to a bounce or complaint in your own system without building the SNS pipeline first. This single difference is often the deciding factor for a small team: building reliable suppression list handling correctly is not a large amount of code, but it is the kind of infrastructure work that is easy to get subtly wrong and expensive to debug later.

Marketing sends and the line between transactional and bulk mail.

Amazon SES does not distinguish between transactional and marketing mail as a product concept. It sends what you tell it to send, and AWS's own acceptable use policies expect you to manage list hygiene and consent yourself. There is no built in Audiences product or unsubscribe management, you build or buy that separately.

Resend separates the two along product lines: the core send API for transactional mail, and Broadcasts and Audiences, billed by contact count, for marketing sends, with unsubscribe handling built in. If your product needs both transactional and marketing email and you do not want to build list management from scratch, that is a meaningful difference in scope, not just price.

Pricing at the volumes you will actually send.

All figures below are current as of September 2026, and both AWS and Resend change pricing periodically, so confirm on the vendor's page before deciding. SES's free tier covers 3,000 messages a month for 12 months when sending from EC2 or another AWS service, which mirrors Resend's own free tier of 3,000 a month with a 100 a day cap. Above that, the gap opens fast: SES costs roughly $0.10 per 1,000 emails, so 10,000 emails costs about a dollar in pure sending fees, while Resend's Pro plan for the same volume is $20 a month. At 500,000 emails a month, raw SES sending cost is roughly $50, against Resend's Scale plan from $90 a month.

That per email gap looks decisive in a spreadsheet, but it leaves out the cost of the engineering time to build bounce handling, suppression management, and a templating layer on raw SES, and the ongoing cost of maintaining it. For a team sending under a few hundred thousand emails a month, the time saved by Resend's managed layer is often worth more than the per email savings from SES. Past that volume, with an engineering team already comfortable in AWS, the math starts to favor building on SES directly.

Analytics, webhooks, and support.

SES publishes event data through Configuration Sets to SNS, Kinesis, or CloudWatch, which is flexible and scales well, but it is a data feed, not a dashboard, so you build the reporting layer yourself. Support follows your existing AWS support plan, so the response time you get depends on the AWS support tier your organization already pays for, rather than anything specific to SES.

Resend gives you a dashboard out of the box along with real time, signed webhooks for delivery, opens, clicks, bounces, and complaints, and turns open and click tracking off by default as a privacy conscious choice you can opt into. Its support is well regarded by users for being fast and helpful, reachable directly rather than through a general AWS support queue.

How to choose between Resend and Amazon SES.

Choose Amazon SES if your volume is very high, your team already lives in AWS, and you have engineers available to own bounce handling, suppression lists, and monitoring as part of your infrastructure. The per email cost at scale is hard to beat, and Configuration Sets give you full control over how event data flows into your own systems.

Choose Resend if you want a turnkey API, React Email, and managed deliverability without building that layer yourself, and your volume is under a few hundred thousand emails a month where the price difference is easily worth the engineering time saved. You can read the setup specifics in the GetFluxly guides for the Resend integration and the AWS SES integration.

If you are still deciding whether to run a dedicated transactional provider at all, or which one, the wider survey in choosing a transactional email provider covers the full field, the head to head in Resend vs Postmark is worth reading if Postmark is also on your shortlist, and the guidance in transactional email best practices for SaaS applies no matter which one you pick.

Resend versus Amazon SES, common questions answered.

Is Resend or Amazon SES better for SaaS transactional email?

Neither is universally better, and the two are not solving the exact same problem. Amazon SES is raw sending infrastructure: extremely cheap, but you build the bounce handling, suppression list, and templating yourself. Resend is a managed layer that happens to run on that same infrastructure, giving you an API, SDKs, React Email, and webhooks out of the box. Choose SES if you already live in AWS and have engineering time to own the plumbing. Choose Resend if you want to ship without building that plumbing, and your volume is under a few hundred thousand emails a month.

How do Resend and Amazon SES pricing compare at volume?

At low volume the two are close: Resend's free tier covers 3,000 emails a month, and SES has its own free tier of 3,000 messages a month for 12 months when sending from EC2 or another AWS service. At real volume, SES is dramatically cheaper on a pure per email basis, about $0.10 per 1,000 emails, plus a dedicated IP at $24.95 a month if you want one. Resend's Pro plan is $20 a month for 50,000 emails, which is a large multiple of the raw SES cost for the same volume, and that gap widens as you scale. The difference is what you are paying for: SES sells you the sending engine, Resend sells you everything built on top of it.

Why is Resend more expensive if it runs on SES infrastructure?

Because the price is not for the sending engine, it is for everything Resend built around it. Resend has publicly acknowledged it runs on top of Amazon SES. What you get for the higher price is a documented API, official SDKs for Node, Python, Ruby, Go, Elixir, and PHP, React Email for writing templates as components, signed webhooks for every event, a dashboard, and managed deliverability tuning. Building an equivalent layer yourself on raw SES, including bounce handling, suppression lists, and a template system, takes real engineering time, so the comparison is really Resend's price against your own team's hourly cost to build and maintain that plumbing.

Which requires more engineering work, Resend or SES?

Amazon SES requires meaningfully more engineering work. It starts in sandbox mode, so you have to file a production access request before you can send to unverified addresses. There is no templating UI, only API based templates. You have to wire up your own bounce and complaint handling through Amazon SNS, manage your own suppression list, and use Configuration Sets if you want structured event data flowing to SNS, Kinesis, or CloudWatch. Resend handles all of that inside its managed layer, so the setup is closer to adding an API key and calling send.

Does Amazon SES have a dashboard for building email templates?

Not in the way Resend or most transactional email tools do. SES supports templates, but they are created and managed through the API rather than a visual editor, so there is no drag and drop or live preview built into the AWS console for this purpose. Teams that want a real templating workflow on SES typically build their own layer on top of it, using something like React Email, or route through a tool like Resend that already built that layer using SES as the underlying sending engine.

Can I use GetFluxly with either Resend or Amazon SES?

Yes. GetFluxly is the triggering, profile, and analytics layer, and it connects to whichever provider you use for sending, including Resend, Amazon SES, SendGrid, Postmark, Mailgun, and any custom SMTP relay. The provider keeps its sending reputation and delivery infrastructure. GetFluxly decides which email fires from which product event, who is in the segment that receives it, and what happened after it landed. That means you can switch between Resend and Amazon SES later without rebuilding your automation logic, because the logic lives in GetFluxly, not in the provider.

There is no universally correct answer here, and any comparison that hands you one is selling something. Amazon SES and Resend are not really competitors so much as two layers of the same stack, and the deciding factor is whether your team wants to build the layer above the sending engine or pay for it already built. Whichever you choose, that provider handles the sending and the reputation. GetFluxly sits on top of either one to trigger the right email from a real product event, segment who receives it, and tie the outcome back to what the user actually did next. The sending stays with the infrastructure you trust. The triggering, the profile, and the analytics live in one place above it.