MailStack
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developer-first transactional email

MailStack vs Resend

Resend popularized the clean, developer-first transactional API. MailStack keeps that ergonomic API and adds the deliverability tooling and a visual builder that Resend leaves to add-ons — at comparable usage pricing.

Pricing model
MailStack
3,000 emails/mo free, then $0.40 / 1,000 — usage-only, no subscription
Resend
Monthly plan tiers with included-email caps
API ergonomics
MailStack
POST /v1/emails, Bearer ms_live_ keys
Resend
POST /emails, Bearer re_ keys
Batch send
MailStack
POST /v1/emails/batch (up to 100/request)
Resend
Batch endpoint available
Visual template builder
MailStack
Built-in drag-and-drop builder
Resend
Code-first (React Email)
Suppression management
MailStack
Automatic bounce/complaint suppression list
Resend
Supported
Spend cap
MailStack
Per-org hard monthly spend cap
Resend
Plan-limited

What Resend is great at

Resend nailed developer experience: great docs, React Email, a tidy API, and fast onboarding. For pure transactional sending it’s a delight.

Why teams choose MailStack

As teams grow they need more than send — suppression management, granular event webhooks, batch sends, a non-engineer template builder, and a hard spend cap. MailStack ships those in one product while keeping the same Bearer-token API and 202-with-message-id ergonomics developers expect from Resend.

Pricing in a sentence

Resend uses monthly plan tiers with email caps; MailStack is pure usage-only with a generous free tier.

Try MailStack free

3,000 emails a month on us — no card required. Switch from Resend in an afternoon.

Read the quickstart → See pricing