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Best Free Transactional Emails of 2026

Updated · 3 picks · live pricing · affiliate disclosure

React Email native with first-class developer experience; YC W23 since 2023.

BEST OVERALL5.5/10$228/yr more

Resend

React Email native with first-class developer experience; YC W23 since 2023.

Free 3K emails/mo; cancel anytime
Try ResendSee full review

How it stacks up

  • Free 3K emails/mo

    vs Loops 1K contacts free

  • Pro 50K $20/mo upgrade

    vs Amazon SES 62K from EC2

  • React Email native

    React Email native

#2
Amazon SES5.5/10

From $24.95/mo

View
#3
Loops4.8/10

From $49/mo

View

All picks at a glance

#PickBest forStartingScore
1ResendBest free for React stacks, 3K emails monthly with React Email native$20.00/mo5.5/10
2Amazon SESBest free at scale, 62K emails monthly from EC2 on AWS$24.95/mo5.5/10
3LoopsBest free for SaaS startups, 1K contacts unlimited transactional$49.00/mo4.8/10

Quick pick by use case

If you only have thirty seconds, find your situation below and skip to that pick.

If I am building a SaaS startup with under one thousand active usersLoopsLoops Free 1K contacts unlimited transactional; Pro 10K at $49/mo upgrade. Marketing+trans unified.If I am building a React or Next.js hobby project under three thousand emails monthlyResendResend Free 3K emails/mo with React Email native; Pro 50K at $20/mo upgrade.If I am hosting on AWS and want the largest free monthly ceiling at scaleAmazon SESAmazon SES Free 62K emails/mo from EC2; PAYG at $0.10/1K emails above. AWS-native.

Compare all 3 picks

Top spec
#1Resend5.5/10$20.00/mo—$228/yr moreFree 3K emails/mo
#2Amazon SES5.5/10$24.95/mo—$287.40/yr moreFree 62K from EC2
#3Loops4.8/10$49.00/mo—$576/yr moreFree 1K contacts unlimited
#1

Resend

5.5/10$228/yr more

Best free for React stacks, 3K emails monthly with React Email native

Try ResendSee Resend alternatives

React Email native with first-class developer experience; YC W23 since 2023.

PlanMonthlyWhat you get
FreeFreeFree 3,000 emails a month with 100/day, REST API, and React Email native templates
Pro 50K$20.00/mo$20 a month for 50,000 emails with custom domains, webhooks, and email analytics; the realistic developer paid entry
Pro 100K$80.00/mo$80 a month for 100,000 emails with all Pro features and dedicated IP add-on available
EnterpriseCustomCustom contract with SLA, SOC 2 audit access, premium support, and dedicated account manager

Resend is the React-stack free pick and the right call for hobby projects and side apps on React or Next.js. Founded 2023 in YC W23. The wedge for free readers: React Email is the load-bearing primary developer experience, not a third-party templating add-on, and the free tier is the most generous catalog free tier with React-stack ergonomics in the category.

Free covers three thousand emails monthly with one hundred per day, API access, React Email native templates, custom domains, and no credit card required. Pro 50K is the upgrade tier at twenty dollars monthly with fifty thousand emails, custom domains, webhooks, and email analytics. Most React-stack hobby projects stay on Free indefinitely until production traffic crosses the three-thousand monthly ceiling; Pro is the upgrade when projects ship to production.

The trade-off versus Loops is workflow scope; Resend is logs-and-emails-focused while Loops bundles marketing and transactional. The trade-off versus Amazon SES is raw scale; Resend caps at three thousand monthly while SES covers sixty-two thousand monthly from EC2. For React-stack hobby projects and side apps, Resend Free is the right call.

Pros

  • Free three thousand emails monthly with one hundred per day for evaluation
  • React Email native is the only free pick with first-class React component templates
  • Custom domains and webhooks included on free tier with no credit card required
  • Pro 50K upgrade at twenty dollars monthly when projects ship to production
  • YC W23 with rapid iteration; SOC 2 Type 2 audited

Cons

  • Single sending stream where Postmark separates transactional and broadcast for deliverability
  • Free monthly ceiling smaller than Amazon SES from EC2 by roughly twenty times
Free 3K emails/moPro 50K $20/mo upgradeReact Email nativeFree 3K emails/mo; cancel anytime

Best for: React-stack hobby projects and side apps under three thousand emails monthly who want React Email native templates with no credit card on the free tier.

Deliverability
8
DX
9
Workflow
10
Value
9
Support
8
Try Resend
#2

Amazon SES

5.5/10$287.40/yr more

Best free at scale, 62K emails monthly from EC2 on AWS

Try Amazon SESSee Amazon SES alternatives

AWS-bundled SMTP and REST with no monthly fee; the cheapest at scale.

PlanMonthlyWhat you get
Free (from EC2)FreeFree 62,000 emails a month from EC2 instances with API + SMTP and basic logs
Pay-as-you-goFree$0.10 per 1,000 outbound emails plus $0.12 per GB of attachments with no monthly fee; AWS-native
Dedicated IPs$24.95/mo$24.95 per dedicated IP a month with IP warming and reputation isolation; the typical paid add-on

Amazon SES is the at-scale free pick and the right call for teams already on AWS with high transactional volume. Launched 2011 by AWS. The wedge for free readers: the free ceiling is roughly twenty times more generous than the next-most-generous catalog free tier when called from EC2 or Lambda, and AWS-native integration removes the need for separate vendor billing for teams already on AWS.

Free covers sixty-two thousand emails monthly when called from EC2 or Lambda with API and SMTP and basic logs. Pay-as-you-go above the free ceiling is ten cents per thousand outbound emails with no monthly fee. Dedicated IPs are twenty-four dollars ninety-five cents per dedicated IP monthly. Most AWS-native teams stay on Free indefinitely if monthly volume sits under the free ceiling; PAYG is the upgrade when production traffic exceeds it.

The trade-off versus Loops is developer ergonomics; Amazon SES requires AWS account setup and IAM configuration where Loops ships in minutes via the API. The trade-off versus Resend is bundled features; SES is a pure SMTP relay without templates or marketing analytics. For teams already on AWS where every dollar matters at scale, SES Free is the right call.

Pros

  • Free sixty-two thousand emails monthly from EC2 instances with no monthly fee
  • Roughly twenty times more generous than the next-most-generous catalog free tier
  • AWS-native with deep IAM, CloudWatch, and SNS integration for existing AWS teams
  • PAYG above free at ten cents per thousand emails for cheapest scaling
  • Multi-region delivery across all AWS regions including EU Frankfurt and APAC

Cons

  • Requires AWS account setup and IAM configuration where Resend ships in fifteen minutes
  • No native templates, drag-drop builders, or marketing analytics included
Free 62K from EC2PAYG $0.10/1K aboveAWS-nativeFree 62K from EC2; PAYG anytime

Best for: Teams already on AWS with high transactional volume who want sixty-two thousand emails free monthly from EC2 with AWS-native integration.

Deliverability
9
DX
9
Workflow
6
Value
10
Support
7
Try Amazon SES
#3

Loops

4.8/10$576/yr more

Best free for SaaS startups, 1K contacts unlimited transactional

Try LoopsSee Loops alternatives

Marketing plus transactional on one platform with unified contact list; YC W23.

PlanMonthlyWhat you get
FreeFreeFree 1,000 contacts with unlimited transactional, basic templates, and unified marketing + transactional platform
Pro 10K$49.00/mo$49 a month for 10,000 contacts with Loops API, audience segmentation, and A/B testing; the realistic SaaS startup paid entry
Pro 50K$199.00/mo$199 a month for 50,000 contacts with the same Pro features and higher monthly cap

Loops is the unlimited-transactional free pick and the right call for SaaS startups under one thousand contacts. Founded 2022 in YC W23. The wedge for free readers: unlimited transactional sending on a one-thousand-contact free tier matches SaaS startup launch shape better than any other catalog free tier, and the marketing-transactional-unified posture removes the second-vendor cost that pure-transactional alternatives impose.

Free covers one thousand contacts with unlimited transactional sending, basic templates, and marketing-transactional unified. Pro 10K is the upgrade tier at forty-nine dollars monthly with ten thousand contacts, Loops API, audience segmentation, and A/B testing. Most SaaS startups stay on Free indefinitely until contact count crosses the one-thousand ceiling; Pro is the upgrade when contacts grow rather than when transactional volume spikes.

The trade-off versus Resend is React-stack ergonomics; Loops ships modern templates but does not ship React Email native at the same depth. The trade-off versus Amazon SES is raw scale; Loops is contact-based while SES is pay-per-email. For SaaS startups under one thousand contacts who would otherwise run a transactional vendor plus a marketing vendor separately, Loops is the right call.

Pros

  • Unlimited transactional sending on free tier with one thousand contacts ceiling
  • Single platform for transactional and marketing with unified contact list
  • Pro 10K upgrade at forty-nine dollars monthly with API, audience segmentation, and A/B testing
  • YC W23 with rapid iteration; modern dashboard and developer experience
  • Pricing is contact-based which simplifies billing for SaaS startups

Cons

  • Marketing features less mature than dedicated marketing platforms like Mailchimp or Klaviyo
  • React Email integration narrower than Resend native depth
Free 1K contacts unlimitedPro 10K $49/mo upgradeYC W23 since 2022Free 1K contacts unlimited transactional; cancel anytime

Best for: SaaS startups under one thousand contacts who would otherwise run a transactional vendor plus a marketing vendor separately and want one tool for both.

Deliverability
8
DX
8
Workflow
9
Value
10
Support
7
Try Loops

How we picked

Each pick gets a transparent composite score from price, features, free-tier availability, and editor fit. Pricing flows from our live database, so when a vendor changes prices the score updates here too.

We weight price at 40 percent, features at 30, free tier at 15, fit at 15. Loops leads because unlimited transactional sending on a thousand-contact free tier matches SaaS startup launch shape better than any other catalog free tier. See the parent /best/transactional-email guide for paid tiers excluded from this lens.

We don't claim "30,000 hours of testing." Our methodology is the formula above plus the editor's published verdict for each pick. Verifiable, auditable, and updated when the underlying data changes.

Why trust Subrupt

We're a subscription tracker first, a buying guide second. Every claim on this page is something you can check.

By use case

Best free for React stacks

Resend

Read the full review →

Try Resend

Best free for AWS-bundled scale

Amazon SES

Read the full review →

Try Amazon SES

How to choose your Free Transactional Email

Free tier ceilings vary 60x across the catalog free picks

The three catalog free picks span very different shapes of free. Loops Free is contact-based with unlimited per-contact transactional sending capped at one thousand contacts; the ceiling matches SaaS startup launch shape but the math breaks past one thousand contacts. Resend Free is email-based at three thousand emails monthly with one hundred per day, the smallest absolute ceiling but with the strongest React-stack ergonomics. Amazon SES Free is email-based at sixty-two thousand emails monthly when called from EC2 or Lambda, roughly twenty times more generous than Resend on raw volume but requiring AWS account setup and IAM configuration. The decision pivots on workload shape rather than absolute ceiling.

Why SendGrid forever-free is gone in 2026

SendGrid retired its forever-free plan on May 27, 2025. The free tier had been one hundred emails daily forever; new accounts now get a 60-day trial only, then twenty dollars monthly Essentials minimum. The retirement triggered a large migration wave through 2025 and 2026 across teams that depended on the free tier. Existing free-tier accounts active before the retirement date kept their access for a transition period, but new SendGrid signups can no longer access free-forever sending. The catalog picks listed here are the genuinely-free permanent paths that survived the SendGrid retirement.

Loops contact-based free vs Resend email-based free

Loops Free at one thousand contacts unlimited transactional and Resend Free at three thousand emails monthly look similar on the surface but differ on workload shape. Loops fits SaaS startups under one thousand active users where each user receives many transactional emails (welcome, password reset, billing receipts, weekly digests). Resend fits hobby projects and side apps where the email-per-user ratio is low and total monthly volume stays under three thousand. A SaaS with five hundred active users sending five emails per user monthly hits twenty-five hundred total which fits both, but the Loops contact-based ceiling scales better as engagement frequency grows. A hobby project with two thousand users sending one email per user monthly fits Resend better because Loops would force the contact-tier upgrade at one thousand and one users.

Out-of-catalog free transactional email worth knowing

Free transactional email lists frequently include projects we do not yet catalog as primary picks. Brevo Transactional at three hundred emails daily permanent free is the most generous out-of-catalog free tier and is listed as an honorable mention on the parent guide. Maileroo at three thousand emails monthly permanent and MailerSend at three thousand emails monthly with no daily limit are popular community recommendations not yet in the catalog. SMTP2GO at one thousand emails monthly permanent free is an HM with the second-best deliverability in the category. From our catalog the three picks listed here are the genuinely-free permanent paths; readers who specifically need Brevo unified marketing or SMTP2GO deliverability should evaluate those vendors directly.

When to upgrade past free to a paid tier (cross-link to parent)

Free paths cover most evaluation and small-volume use cases but each pick has a clear upgrade trigger. Loops Free outgrows past one thousand contacts; Pro 10K at forty-nine dollars monthly is the upgrade. Resend Free outgrows past three thousand emails monthly or one hundred per day; Pro 50K at twenty dollars monthly is the upgrade. Amazon SES Free outgrows past sixty-two thousand emails monthly from EC2; PAYG at ten cents per thousand emails is the upgrade. At any of those triggers, see [our /best/transactional-email guide](/best/transactional-email) for the broader paid lineup including SendGrid Essentials post-retirement, Postmark stream isolation, Mailgun API parity, and MailPace EU privacy excluded from this free lens.

Frequently asked questions

What replaced SendGrid forever-free for new accounts?

Nothing on SendGrid itself. SendGrid retired forever-free on May 27, 2025; new accounts now get a 60-day trial only, then twenty dollars monthly minimum. The genuinely-free permanent replacements from our catalog are Loops Free at 1K contacts unlimited transactional, Resend Free at 3K emails monthly with React Email native, and Amazon SES Free at 62K emails monthly from EC2 or Lambda.

Which free transactional email API is most generous overall?

It depends on workload shape. Amazon SES Free at 62K emails monthly from EC2 is the most generous on raw volume by roughly twenty times. Loops Free at 1K contacts with unlimited transactional sending is the most generous on per-contact frequency for SaaS startups. Resend Free at 3K emails monthly is the most generous for React-stack ergonomics. The right pick depends on workload shape.

Is Loops Free really unlimited transactional sending?

Yes within the one-thousand-contact ceiling. Loops Free covers one thousand contacts with unlimited transactional sending per contact, basic templates, and marketing-transactional unified. The unlimited part means there is no monthly email cap; what is capped is the contact count. SaaS startups with under one thousand active users can send unlimited transactional emails to those users on the free tier. Past one thousand contacts the upgrade is Pro 10K at forty-nine dollars monthly.

Can I use Amazon SES from a Vercel deployment instead of EC2?

Yes, but the sixty-two thousand free ceiling only applies when sending from EC2 instances or Lambda functions. From Vercel or other non-AWS infrastructure, Amazon SES costs ten cents per thousand emails from the first email with no free tier. For Vercel-hosted React apps that want a free tier, Resend Free at three thousand emails monthly is the better fit. For AWS-hosted apps, the EC2 free ceiling applies and Amazon SES Free is the most generous catalog option.

Does Subrupt earn a commission from these free picks?

On most paid upgrades. We disclose this on every /best page. Free tiers themselves have no transaction. Paid tiers on Loops Pro, Resend Pro, and Amazon SES PAYG have plans where we earn commission only on conversion. The composite ranking weights price at 40 percent, features at 30, free tier at 15, fit at 15; none tuned by affiliate rate.

Why is Loops ranked first over the more generous Amazon SES?

Loops wins on workload-shape fit for SaaS startups because unlimited transactional per contact matches the launch-shape pattern better than raw volume ceiling. Amazon SES is genuinely more generous on raw volume but requires AWS account setup and IAM configuration that adds days of integration work for teams not already on AWS. The decision pivots on whether the free workload is contact-frequency-bound (Loops) or volume-bound (Amazon SES).

Is React Email worth the lock-in on the Resend free tier?

For React-stack teams committed to component-driven development, yes. React Email components transfer to any future vendor that adopts the standard, and the open-source library is independent of Resend the vendor. For polyglot teams using Python, Ruby, Go, or Node alongside React, the React Email advantage is narrower; Mailgun or Postmark MJML templates work consistently across language SDKs. The lock-in concern is overblown because the components are open-source React code.

Can I run a production SaaS on a free transactional email tier?

Yes for low-volume SaaS. Loops Free works for SaaS under 1K active users. Resend Free works for SaaS under 3K emails monthly. Amazon SES Free works for SaaS under 62K emails monthly when EC2-hosted. The trade-off is no SLA, no dedicated support, and reputation isolation lower than paid tiers. For production-critical authentication where deliverability matters more than dollars saved, the upgrade often pays off in the first quarter.

What about Brevo, Mailgun, and Mailtrap free tiers?

Brevo Transactional ships three hundred emails daily permanent free, the most generous out-of-catalog free tier. Mailgun ships a 30-day trial at five thousand emails which is not permanent. Mailtrap ships up to three thousand five hundred emails monthly free, primarily as a sandbox for testing rather than production sending. From our catalog the three picks listed here are the genuinely-free permanent paths; Brevo and Mailtrap are honorable mentions on the parent guide.

How often is this guide updated?

We re-review pricing and features annually at minimum, with mid-year refreshes when major vendor announcements happen. SendGrid retired forever-free on May 27, 2025. Loops launched 2022 in YC W23 and the contact-based free tier has stayed consistent. Resend launched 2023 with the three-thousand monthly free tier from day one. Amazon SES has shipped the sixty-two-thousand-from-EC2 free tier since 2011. The lastReviewed date reflects the most recent editorial pass.

Subrupt Editorial

The team behind subrupt.com. We track subscriptions, surface cheaper alternatives, and publish buying guides where the score formula is on the page so you can recompute it yourself. We do not claim 30,000 hours of testing. What we claim is live pricing from our database, a transparent composite score, and honest savings math against a category baseline.

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Affiliate disclosure: Subrupt earns a commission when you switch to a service through our recommendation links. This never changes the price you pay. We only recommend services where there's a real cost or feature advantage for you, and our picks are based on the data on this page, not on which programs pay the most.

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