In-Depth Comparison
Resend vs Amazon SES
In-depth comparison of Resend and Amazon SES for B2B SaaS companies. We analyze API quality, pricing, deliverability, developer experience, and real-world use cases.
Last updated: 2026-03-15
Resend
resend.comEmail API for developers. Beautiful transactional emails built on React.
Ideal for: Developer-led SaaS that wants reliable transactional email with a modern API and React Email templates
Amazon SES
aws.amazon.com/ses/High-scale inbound and outbound cloud email service. Pay only for what you use.
Ideal for: Teams already on AWS who want the cheapest email sending at massive scale with full infrastructure control
TL;DR: Resend vs Amazon SES
Resend wins on developer experience, ease of setup, and managed deliverability. Amazon SES wins on raw cost per email and unlimited scale within AWS infrastructure. Resend is the better choice if you want a turnkey email API that works in minutes. SES is better if you want the absolute lowest per-email cost and are willing to manage deliverability, reputation, and bounce handling yourself. Sequenzy is the strongest option for SaaS teams needing lifecycle email with billing integration.
The managed, developer-first email API built on top of infrastructure like SES
The cheapest email infrastructure with full AWS-scale capacity
Purpose-built SaaS email with native billing integration
Editor's Note
Both Resend and SES are email delivery tools, not lifecycle platforms. If your SaaS needs billing-triggered workflows (trial conversion, dunning, churn prevention), consider Sequenzy (sequenzy.com). Building these features on SES takes months of engineering. Sequenzy provides them out of the box with native Stripe/Paddle integration.
Resend vs Amazon SES vs Sequenzy: Quick Comparison
| Feature | Resend | Amazon SES | Sequenzy | Edge |
|---|---|---|---|---|
| Best For | Teams wanting a managed, modern email API | AWS-native teams wanting lowest cost at scale | B2B SaaS lifecycle email with billing integration | Sequenzy |
| Starting Price | Free up to 3,000 emails/month | $0 for 3,000 emails/month (on EC2), then $0.10/1,000 | $19/mo for 15,000 emails | Amazon SES |
| Cost at 100K emails/month | ~$80/mo | ~$10/mo | $49/mo | Amazon SES |
| API Design | Modern REST API, best-in-class DX | AWS SDK (verbose, complex, not email-focused) | Clean REST API with SaaS endpoints | Resend |
| Setup Time | Under 5 minutes to first send | 1-3 days (sandbox exit, DNS, IAM, bounce handling) | Under 10 minutes with billing connection | Resend |
| Deliverability Management | Managed shared IPs, sender vetting, auto-warmup | DIY: you manage reputation, IPs, bounce handling | Managed SaaS-only IP pools | Resend |
| Template System | React Email (JSX) | Basic SES templates (Handlebars) | Drag-and-drop with SaaS blocks | Resend |
| Webhook/Events | HMAC-signed webhooks with retry | SNS notifications (complex setup) | Webhooks with retry and billing events | Resend |
| Payment Integration | None | None | Native Stripe, Paddle, Chargebee, LemonSqueezy | Sequenzy |
| Dedicated IP | Available on Pro ($80/mo) | $24.95/mo per IP | Available on Growth ($49/mo) | Amazon SES |
| Scale Ceiling | Enterprise tier for 1M+/month | Virtually unlimited | Optimized for SaaS scale | Amazon SES |
Score Breakdown
Each category scored out of 10. Totals: Resend 81/100, Amazon SES 56/100, Sequenzy 82/100.
Feature-by-Feature Comparison
Detailed feature analysis across every category that matters for B2B SaaS email.
📨 Transactional Email
| Feature | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Send speed | 9/10 Sub-second, optimized for speed | 7/10 Variable. Depends on region and sending quota ramp. | 8/10 Reliable delivery, lifecycle-optimized |
| Template system | 10/10 React Email JSX components | 4/10 Basic SES templates with Handlebars. Limited capabilities. | 8/10 Liquid templates with SaaS blocks |
| Bounce handling | 9/10 Automatic suppression and classification | 5/10 You must set up SNS topics and handle bounces yourself. No auto-suppression. | 8/10 Automatic with payment-aware context |
| Sending quota | 7/10 Plan-based limits, enterprise for higher | 10/10 Starts at 200/day in sandbox. Ramps to millions after review. | 7/10 Plan-based limits |
| Configuration complexity | 10/10 API key and domain verify, done in minutes | 3/10 IAM roles, sandbox exit request, SNS setup, SQS for events, DNS config | 9/10 API key, domain, billing provider connection |
💻 API & Developer Tools
| Feature | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| API design | 10/10 Clean REST API designed for email | 4/10 Generic AWS SDK pattern. Verbose. Not email-specific. | 8/10 Clean REST API with lifecycle endpoints |
| Documentation | 10/10 Excellent, interactive, email-focused | 6/10 Comprehensive but buried in AWS docs. Hard to navigate. | 8/10 SaaS-focused with integration guides |
| SDK quality | 9/10 Purpose-built SDKs in 7 languages | 5/10 AWS SDK (generic, not email-optimized) | 7/10 Node.js and Python SDKs |
| Event notifications | 9/10 HMAC-signed webhooks with retry | 5/10 Requires SNS topic setup, Lambda functions, or SQS queues | 8/10 Webhooks with retry and billing events |
| Sandbox/testing | 8/10 Test mode in development | 4/10 All new accounts start in sandbox (can only send to verified emails) | 7/10 Test mode for development |
🚀 Deliverability & Infrastructure
| Feature | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| IP management | 8/10 Managed shared IPs with sender vetting | 6/10 Shared IPs by default. Dedicated IPs at $24.95/mo each. You manage warmup. | 8/10 SaaS-only IP pools |
| Reputation management | 9/10 Platform manages IP reputation for you | 3/10 You are fully responsible for sender reputation | 8/10 Managed reputation with SaaS focus |
| Domain authentication | 9/10 One-click DNS verification | 6/10 Manual DNS setup through AWS console | 8/10 Guided setup wizard |
| Compliance | 7/10 Suppression lists and unsubscribe support | 6/10 Account-level suppression list. Limited compliance tooling. | 8/10 Built-in compliance with preference center |
| Scale capacity | 7/10 Handles moderate to high volume | 10/10 Virtually unlimited. AWS infrastructure. | 7/10 Optimized for SaaS scale |
📊 Analytics & Monitoring
| Feature | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Dashboard | 6/10 Basic dashboard, most data via API | 4/10 Basic SES console metrics. Most analytics require CloudWatch setup. | 8/10 SaaS-focused dashboard with MRR |
| Delivery tracking | 8/10 Real-time delivery logs | 5/10 Event publishing to SNS/CloudWatch requires setup | 8/10 Real-time with lifecycle context |
| Bounce analytics | 8/10 Detailed bounce classification | 5/10 Bounce notifications via SNS (you build the analytics) | 8/10 Bounce tracking with payment context |
| Cost monitoring | 7/10 Clear plan pricing, predictable costs | 6/10 AWS billing dashboard (can be complex to track email-specific costs) | 8/10 Clear plan pricing |
| Alerts | 7/10 Standard alerting | 7/10 CloudWatch alarms for bounce rates, complaints (requires setup) | 8/10 Alerts with lifecycle context |
🎯 SaaS-Specific Features
| Feature | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Billing integration | 0/10 Not available | 0/10 Not available | 10/10 Native Stripe, Paddle, LemonSqueezy, Chargebee |
| Lifecycle sequences | 0/10 No automation | 0/10 No automation | 9/10 Pre-built onboarding, dunning, churn prevention |
| Dunning emails | 0/10 Not available | 0/10 Not available | 10/10 Auto-triggered by payment failures |
| Trial conversion | 0/10 Not available | 0/10 Not available | 10/10 Pre-built from billing trial status |
| Revenue attribution | 0/10 Not available | 0/10 Not available | 9/10 MRR impact per sequence |
Resend vs Amazon SES vs Sequenzy: Pricing
Resend charges monthly by email volume tier. SES charges per email ($0.10 per 1,000) with no monthly minimums. Sequenzy charges by email volume with all features included.
Free plan: 3,000 emails/month, 1 domain
Free tier: 3,000 emails/month when sending from EC2 (62,000 with free tier)
Free trial: 14 days with full features, then $19/mo
| Tier | Resend | Amazon SES | Sequenzy | Volume |
|---|---|---|---|---|
| Starter | $20/mo 50,000 emails, 10 domains, webhooks, API access | ~$5/mo $0.10/1,000 emails. No monthly fee. Plus data transfer costs. | $19/mo 15,000 emails, all SaaS workflows, billing integration | 50K emails/month |
| Growth | $80/mo 200,000 emails, dedicated IP, team features | ~$20/mo $0.10/1,000 emails. Dedicated IP at $24.95/mo extra. | $49/mo 50,000 emails, dedicated IP, advanced analytics | 200K emails/month |
| Scale | Custom Custom volume, SLA, SSO | ~$100/mo $0.10/1,000 emails. Multiple dedicated IPs. Volume discounts available. | $149/mo 200,000 emails, SLA, SSO, custom onboarding | 1M emails/month |
Resend: Watch Out For
- !No marketing features, need a separate tool
- !Enterprise pricing requires sales conversation
- !No email validation service
Amazon SES: Watch Out For
- !Dedicated IPs cost $24.95/month each (you need multiple for warmup)
- !Data transfer fees for attachments
- !CloudWatch costs for monitoring and alerting
- !Engineering time to build bounce handling, suppression, analytics, and compliance
- !SNS costs for event notifications
- !Lambda/SQS costs if processing events
Sequenzy: Watch Out For
- !Smaller SDK ecosystem
- !Free tier is a 14-day trial
- !Higher per-email cost than raw SES
Pricing Verdict: SES is the cheapest by far on per-email cost: roughly $0.10 per 1,000 emails. But the hidden cost is engineering time. Building bounce handling, suppression lists, analytics, and compliance on SES can take weeks of development. Resend gives you all of that out of the box for a predictable monthly fee. Sequenzy is the best value for SaaS teams because it includes lifecycle automation that would cost $100+/mo extra on top of either SES or Resend.
Cost Comparison Note
SES looks cheapest on paper, but total cost of ownership includes engineering time to build bounce handling, suppression, analytics, and compliance. For a small SaaS team, those engineering weeks are worth $10,000-50,000 in opportunity cost. Sequenzy at $19/mo includes lifecycle automation that would take months to build on SES.
B2B SaaS Use Cases
How each platform handles the email workflows that matter most for B2B SaaS companies.
🎯 User Onboarding Sequences
Automated onboarding email sequences for new signups.
Resend
Build onboarding logic in your code. Send each email via Resend API with React Email templates. Sequencing in your codebase.
Amazon SES
Send emails via SES API when your application triggers each step. You build all sequencing, timing, and branching logic. Templates via SES templates or raw HTML.
Sequenzy
Pre-built onboarding templates connected to billing. Branch by plan, engagement, and payment status. Ready in minutes.
Verdict: Sequenzy wins with ready-made SaaS onboarding templates. Resend at least makes sending easy. SES requires the most engineering effort.
Real-World Example
A SaaS needs a 5-email onboarding series. With SES, a developer builds the queue, timing, and templates. With Resend, they at least get clean templates. With Sequenzy, they customize a pre-built flow.
Example subject line: Welcome to [App]. Here is your quickstart checklist.
🔔 Transactional Notifications
Password resets, receipts, alerts requiring instant delivery.
Resend
Send via API with React Email templates. Managed deliverability. Sub-second delivery.
Amazon SES
Send via SES API or SMTP. Lowest cost per email. You manage IP reputation, bounce handling, and suppression yourself.
Sequenzy
Send via API with SaaS-specific templates for invoices and plan changes. Reliable delivery.
Verdict: Resend is the easiest for transactional email with managed deliverability. SES is the cheapest but requires significant setup. Sequenzy adds SaaS context to transactional templates.
Real-World Example
A SaaS sends 100K transactional emails monthly. Resend: $80/mo, fully managed. SES: ~$10/mo, but you manage everything. Sequenzy: $49/mo with lifecycle features included.
Example subject line: Your password has been reset
💰 Trial-to-Paid Conversion
Strategic trial conversion emails tied to billing events.
Resend
Build conversion logic in your app. Send via Resend API at milestones.
Amazon SES
Build everything from scratch: trial tracking, email scheduling, template management, delivery via SES.
Sequenzy
Purpose-built trial conversion connected to Stripe/Paddle. Pre-built templates for each trial stage.
Verdict: Sequenzy wins decisively. SES provides zero lifecycle features. Resend at least simplifies the sending part.
Real-World Example
A SaaS with 14-day trials needs conversion emails. With SES, developers build the entire system. Sequenzy handles it automatically.
Example subject line: Your trial ends in 3 days.
💳 Payment Failed (Dunning)
Automated payment recovery emails.
Resend
Send dunning emails via Resend API from billing webhooks.
Amazon SES
Build dunning system: webhook processing, email scheduling, template management, SES delivery.
Sequenzy
Automatic dunning from Stripe/Paddle payment failures. Escalating templates. Auto-stops on success.
Verdict: Sequenzy dominates. SES requires building the entire dunning system from scratch, which can take weeks of engineering time.
Real-World Example
A SaaS needs escalating dunning emails. Building this on SES takes 1-2 weeks of development. Sequenzy does it automatically.
Example subject line: Action required: your payment failed
📬 Massive Scale Sending
Sending millions of emails per month at the lowest possible cost.
Resend
Enterprise plan required for 1M+/month. Managed deliverability and support included.
Amazon SES
Built for this. Pay $0.10/1,000 emails with virtually no ceiling. Dedicated IPs for reputation control. AWS infrastructure handles any volume.
Sequenzy
Scale plan handles up to hundreds of thousands/month. Not optimized for multi-million volume.
Verdict: SES is the clear winner for raw volume. At 10M emails/month, SES costs about $1,000. Resend would cost significantly more. Sequenzy is not designed for this scale.
Real-World Example
A platform sends 5M notification emails monthly. SES: ~$500/mo. Resend: custom enterprise pricing. SES is the obvious choice for raw volume.
Example subject line: New notification from [App]
🔄 Churn Prevention
Re-engagement emails for declining users.
Resend
Build detection in your app. Send via Resend API.
Amazon SES
Build everything: behavior tracking, churn scoring, email scheduling, SES delivery.
Sequenzy
Churn prevention combining product usage with billing data. Auto-identify at-risk users. Pre-built win-back sequences.
Verdict: Sequenzy wins with billing-aware churn prevention. Neither Resend nor SES has any churn detection features.
Real-World Example
A SaaS wants automated re-engagement. With SES, developers build the entire system. Sequenzy handles it with subscription context.
Example subject line: We noticed you have not logged in this week.
☁️ AWS-Native Architecture
Your entire stack is on AWS and you want to keep email within the same ecosystem.
Resend
External service. API calls go outside AWS. Additional vendor relationship to manage.
Amazon SES
Native AWS service. IAM-based authentication. No external dependencies. Integrates with CloudWatch, SNS, Lambda, S3, and other AWS services.
Sequenzy
External service. API calls go outside AWS.
Verdict: If you are deeply committed to AWS and want everything in one ecosystem, SES is the natural choice. It integrates with all AWS services and uses IAM authentication.
Real-World Example
A SaaS running entirely on AWS wants email in the same ecosystem. SES integrates with Lambda, CloudWatch, and SNS. Resend and Sequenzy are external services.
Example subject line: N/A (architecture decision)
📈 Upsell & Expansion
Upgrade emails based on usage patterns.
Resend
Your app detects opportunities and sends via Resend API.
Amazon SES
Build detection, scheduling, and delivery entirely in your codebase using SES.
Sequenzy
Automatic triggers on plan limits. Personalized by billing history.
Verdict: Sequenzy automates expansion revenue with billing data. Neither Resend nor SES has upsell features.
Real-World Example
An API platform wants to upsell users hitting limits. Sequenzy automates this. SES and Resend require custom development.
Example subject line: You have used 90% of your API calls this month
The Bigger Picture
The gap between raw email infrastructure (Resend, SES) and SaaS lifecycle needs is significant. Neither platform offers trial conversion, dunning, or churn prevention. Sequenzy was purpose-built to fill this gap for B2B SaaS teams with native billing provider integrations.
Automation Capabilities
Email automation is critical for B2B SaaS. Here is how Resend, Amazon SES, and Sequenzy compare.
| Capability | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Visual workflow builder | No No workflow builder | No No workflow builder | Yes Visual builder with SaaS templates |
| Event-based triggers | No Your app calls the API | No Your app calls SES via Lambda or directly | Yes Product + billing events |
| Drip sequences | No Not available | No Not available (build with Step Functions/Lambda) | Yes Pre-built SaaS lifecycle sequences |
| Conditional branching | No Build in your code | No Build with Step Functions or Lambda | Yes Branch by plan, MRR, trial status |
| Bounce auto-handling | Yes Automatic suppression | No You must process SNS bounce notifications and manage suppression | Yes Automatic with payment context |
| Goal tracking | No Not available | No Not available | Yes Auto-remove on billing events |
| Dynamic content | Yes React components with props | Yes SES templates with variables | Yes Dynamic content with billing data |
API & Developer Experience
For B2B SaaS teams, the API quality directly impacts how fast you can integrate and iterate on email.
Resend API
- SDKs: Node.js, Python, Go, Ruby, PHP, Java, Elixir
- Docs: 10/10
- Webhooks: HMAC-signed webhooks with retry for all events
- Rate Limit: 100 req/s on Pro, higher on Enterprise
- Batch: Batch API for multiple recipients
Amazon SES API
- SDKs: JavaScript, Python, Go, Ruby, PHP, Java, .NET, C++, Rust
- Docs: 6/10
- Webhooks: SNS notifications require topic setup, subscription confirmation, and message parsing. Not traditional webhooks.
- Rate Limit: 14 emails/second default (can be increased via support request)
- Batch: SendBulkTemplatedEmail for up to 50 destinations per call
Sequenzy API
- SDKs: Node.js (official), Python (official), REST API for all languages
- Docs: 8/10
- Webhooks: Webhooks with retry and billing events
- Rate Limit: 50 req/s, higher on Scale
- Batch: Batch sending with per-recipient personalization
Resend Code Example
import { Resend } from "resend";
const resend = new Resend("re_your_api_key");
await resend.emails.send({
from: "Acme <hello@acme.com>",
to: "user@company.com",
subject: "Welcome to Acme",
html: "<h1>Welcome, Sarah!</h1>",
});Amazon SES Code Example
import { SESv2Client, SendEmailCommand }
from "@aws-sdk/client-sesv2";
const client = new SESv2Client({ region: "us-east-1" });
await client.send(new SendEmailCommand({
FromEmailAddress: "hello@acme.com",
Destination: {
ToAddresses: ["user@company.com"],
},
Content: {
Simple: {
Subject: { Data: "Welcome to Acme" },
Body: {
Html: { Data: "<h1>Welcome, Sarah!</h1>" },
},
},
},
}));Sequenzy Code Example
import { Sequenzy } from "sequenzy";
const sq = new Sequenzy("sq_your_api_key");
await sq.subscribers.add({
email: "user@company.com",
firstName: "Sarah",
stripeCustomerId: "cus_abc123",
});
await sq.sequences.trigger({
email: "user@company.com",
sequence: "trial_onboarding",
});Email Deliverability Comparison
Your emails are useless if they do not reach the inbox. Here is how all three platforms handle deliverability.
| Factor | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Infrastructure | Managed infrastructure with sender vetting | AWS infrastructure. You share IPs with all SES senders or buy dedicated. | Managed with SaaS-only sender pools |
| Inbox Placement Rate | ~96-98% (estimated) | ~90-95% on shared IPs (highly variable), better on dedicated | ~96-98% (SaaS-only pools) |
| Dedicated IP | Available on Pro ($80/mo) with auto-warmup | $24.95/mo per IP. You manage warmup. | Available on Growth ($49/mo) |
| Auth Protocols | SPF, DKIM, DMARC, Custom Return-Path | SPF, DKIM, DMARC, custom MAIL FROM | SPF, DKIM, DMARC, Custom Return-Path |
| Reputation Management | Platform manages reputation for you | You monitor and manage your own reputation via SES dashboard | Managed with SaaS-focused approach |
| Account Suspension Risk | Low, managed by platform | SES will suspend accounts exceeding bounce/complaint thresholds | Low, managed by platform |
SES deliverability requires active management. If your bounce rate exceeds 5% or complaint rate exceeds 0.1%, AWS can pause your sending. Resend and Sequenzy handle this automatically with managed suppression lists and sender vetting. SES dedicated IPs help but require careful warmup.
Integration Ecosystem
Resend has ~15 integrations, Amazon SES has ~200, and Sequenzy has ~25. Here is how they compare across key B2B SaaS categories.
Payment & Billing
| Service | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Stripe | Yes (API Only) | Yes (API Only) | Yes (Native) |
| Paddle | Yes (API Only) | Yes (API Only) | Yes (Native) |
| LemonSqueezy | Yes (API Only) | Yes (API Only) | Yes (Native) |
AWS Services
| Service | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Lambda | No (API Only) | Yes (Native) | No (API Only) |
| CloudWatch | No (None) | Yes (Native) | No (None) |
| SNS | No (None) | Yes (Native) | No (None) |
Automation & Workflow
| Service | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Zapier | Yes (Official) | Yes (3rd Party) | Yes (Official) |
| Make (Integromat) | Yes (3rd Party) | Yes (3rd Party) | Yes (Official) |
| n8n | Yes (3rd Party) | Yes (Official) | Yes (3rd Party) |
CRM
| Service | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| HubSpot | No (API Only) | No (API Only) | Yes (Official) |
| Salesforce | No (API Only) | No (API Only) | Yes (3rd Party) |
Development Frameworks
| Service | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Next.js | Yes (Native) | Yes (API Only) | Yes (API Only) |
| Django/Flask | Yes (Official) | Yes (Official) | Yes (Official) |
| Rails | Yes (Official) | Yes (API Only) | Yes (API Only) |
Analytics & Reporting
What data you can track and how each platform helps you measure email performance.
| Metric | Resend | Amazon SES | Sequenzy |
|---|---|---|---|
| Open rate tracking | Per-email via webhooks | Requires event publishing setup to SNS/CloudWatch | Per-sequence and per-campaign |
| Click tracking | Click tracking via webhooks | Available via configuration sets | Link-level with conversion attribution |
| Bounce tracking | Detailed classification | Via SNS notifications (you build the analytics) | With payment-status context |
| Reputation dashboard | Domain health monitoring | SES reputation dashboard with account health | Standard delivery metrics |
| Revenue attribution | Not available | Not available | Native MRR impact per sequence |
| Dashboard | Basic, most data via API | Basic SES console, most analytics require CloudWatch | SaaS-focused with lifecycle metrics |
| Export | API access | CloudWatch metrics export, S3 event publishing | CSV export plus API |
Resend: Unique Features
- + Provider-level delivery breakdown
- + Real-time delivery logs
- + Webhook event replay
- + Domain health monitoring
Amazon SES: Unique Features
- + Account-level reputation dashboard
- + CloudWatch integration for custom metrics
- + S3 event publishing for long-term storage
- + Virtual deliverability manager (paid add-on)
Sequenzy: Unique Features
- + MRR impact per sequence
- + Trial conversion rate tracking
- + Dunning recovery rate dashboard
- + Churn prevention metrics
- + Subscriber lifecycle overview
Pros & Cons
Resend
Pros
- + Best-in-class developer experience and API design
- + Fully managed deliverability (bounce handling, suppression, IP reputation)
- + React Email for templates as React components
- + Under 5 minutes to first email send
- + HMAC-signed webhooks with retry logic
- + Official SDKs in 7 languages
- + Clean, predictable pricing
- + Excellent documentation
Cons
- - Significantly more expensive per email than SES
- - No SMTP relay
- - No AWS-native integration
- - Younger platform with shorter track record
- - No marketing automation
- - Analytics are minimal
- - Enterprise pricing not published
- - No SaaS lifecycle features
Amazon SES
Pros
- + Lowest cost per email in the market ($0.10/1,000)
- + Virtually unlimited sending capacity
- + Native AWS integration (IAM, CloudWatch, Lambda, SNS, S3)
- + Both API and SMTP support
- + Dedicated IPs at $24.95/mo each
- + Global AWS infrastructure with regional sending
- + Enterprise SLA backed by AWS
- + Can receive inbound email via SES receiving
Cons
- - Complex setup taking days instead of minutes
- - You must build bounce handling, suppression, and compliance yourself
- - SNS-based events are much harder than webhooks
- - Sandbox restrictions delay getting started
- - AWS SDK is verbose and not email-focused
- - Risk of account suspension for high bounce/complaint rates
- - No visual dashboard for email analytics
- - No templates, automation, lifecycle, or marketing features
Who Should Use What?
Specific recommendations based on your company type and needs.
Early-stage SaaS
Pre-PMF startup wanting to get email working fast.
Sequenzy at $19/mo gives you transactional email plus lifecycle sequences and billing integration. SES would take days to set up and weeks to build the features Sequenzy includes.
AWS-native architecture
Your stack is entirely on AWS and you want email in the same ecosystem.
SES integrates natively with IAM, Lambda, CloudWatch, and other AWS services. If you are already deep in AWS and have engineering resources, SES is the natural choice.
Cost-sensitive high-volume sender
You send 5M+ emails monthly and want the lowest per-email cost.
At $0.10/1,000 emails, SES costs about $500 for 5M emails. Any managed platform would cost significantly more. Just budget for engineering time to build the infrastructure around it.
Developer tool wanting best DX
Engineering team that values clean APIs and fast setup.
Resend has the best developer experience. 5 minutes to first email vs. days with SES. React Email templates, clean SDKs, and real webhooks instead of SNS.
Product-led growth SaaS
Self-serve signups, trials, billing-aware lifecycle email.
PLG SaaS needs billing-aware lifecycle email. Building this on SES would take months of engineering. Sequenzy does it out of the box with native Stripe/Paddle integration.
Bootstrapped SaaS watching costs
Need transactional and lifecycle email on a tight budget.
While SES is cheapest per email, the engineering time to build lifecycle email on SES costs far more than Sequenzy at $19-49/mo. True cost of ownership favors Sequenzy for SaaS teams.
Migration Guide
Migrating from Resend to Amazon SES
Steps
- 1. Set up AWS account and enable SES
- 2. Request production access (exit sandbox)
- 3. Verify sending domain with DNS records
- 4. Set up IAM roles and credentials
- 5. Convert React Email templates to SES templates or raw HTML
- 6. Build bounce and complaint handling via SNS
- 7. Set up event publishing via configuration sets
- 8. Build suppression list management
- 9. Update API calls to use AWS SDK
- 10. Warm up dedicated IPs if using them
- 11. Test all flows end-to-end
Watch Out For
- ! Sandbox exit can take 1-3 business days
- ! You must build bounce handling and suppression from scratch
- ! SNS event processing is very different from webhooks
- ! IP warmup takes 2-4 weeks for dedicated IPs
- ! SES can suspend your account if bounce/complaint rates are too high
Migrating from Amazon SES to Resend
Steps
- 1. Sign up for Resend and verify domain
- 2. Get API key and install SDK
- 3. Update API calls from AWS SDK to Resend SDK
- 4. Replace SNS event processing with Resend webhooks
- 5. Migrate templates to React Email or HTML
- 6. Test all email flows
- 7. Switch traffic and decommission SES resources
Watch Out For
- ! Moving from SES cost to Resend pricing is a significant price increase per email
- ! Any Lambda/SNS/SQS architecture around SES needs to be replaced
- ! If using SES for inbound/receiving, you need a replacement
- ! AWS SDK authentication patterns do not apply to Resend
The Bottom Line
Choose Resend if...
- ✓ You want a managed email API that works in minutes, not days
- ✓ Developer experience and clean APIs are your top priority
- ✓ You want managed deliverability without DIY bounce handling
- ✓ You build email templates in React
- ✓ You prefer predictable monthly pricing over per-email billing
- ✓ You do not want to manage SES infrastructure, SNS topics, and IAM roles
Choose Amazon SES if...
- ✓ Lowest per-email cost is your top priority
- ✓ You send millions of emails per month
- ✓ Your stack is on AWS and you want native integration
- ✓ You have engineering resources to build email infrastructure
- ✓ You need inbound email receiving via SES
- ✓ You need SMTP relay alongside API access
Frequently Asked Questions
Is Resend built on top of Amazon SES?
Resend uses AWS infrastructure for some of its sending, but it is not simply a wrapper around SES. Resend adds managed deliverability, a modern API, React Email templates, webhooks, bounce handling, and suppression management that SES does not provide. Think of it as a managed email service that handles the infrastructure complexity for you.
How much cheaper is SES than Resend?
SES is roughly 4-8x cheaper on per-email cost alone. At 100K emails/month: SES costs ~$10, Resend costs ~$80. But SES requires significant engineering investment to build bounce handling, suppression lists, analytics, and compliance. Factor in 2-4 weeks of engineering time and ongoing maintenance when comparing total cost.
Can SES suspend my account?
Yes. If your bounce rate exceeds 5% or complaint rate exceeds 0.1%, AWS will put your account under review and may pause sending. This is a real risk without proper bounce handling and list hygiene. Resend and Sequenzy manage this automatically with suppression lists and sender vetting.
How long does SES take to set up compared to Resend?
Resend takes about 5 minutes to send your first email. SES typically takes 1-3 days: you start in sandbox mode (can only send to verified addresses), need to request production access, set up DNS authentication, configure SNS for events, and build bounce handling. The time difference is significant.
Should I use SES directly or a managed service like Resend?
Use SES directly if: you send millions of emails monthly and cost is the priority, you are already on AWS, and you have engineering resources to build and maintain email infrastructure. Use Resend if: you want to focus on your product instead of email plumbing, you value developer experience, and you are willing to pay more per email for a managed solution.
Does SES support inbound email?
Yes, SES can receive inbound emails and route them to S3, Lambda, or SNS. This is a unique capability among email services. Resend and Sequenzy do not support inbound email.