MailStack
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transactional + marketing email

MailStack vs SendGrid

SendGrid is a mature, high-volume email platform from Twilio. MailStack matches its deliverability stack while replacing tiered subscriptions with simple usage-only pricing and a friendlier developer API.

Pricing model
MailStack
3,000 emails/mo free, then $0.40 / 1,000 — usage-only, no subscription
SendGrid
Tiered monthly plans (Essentials, Pro, Premier) with email caps
Free tier
MailStack
3,000 emails every month, forever
SendGrid
100 emails/day on the free plan
Transactional API
MailStack
POST /v1/emails — single + batch, returns message id
SendGrid
v3 Mail Send API
Domain auth (SPF/DKIM/DMARC)
MailStack
Easy DKIM with auto-generated DNS records + verify endpoint
SendGrid
Domain authentication wizard
Visual template builder
MailStack
Built in, drag-and-drop, versioned
SendGrid
Design Library / code editor
Spend cap
MailStack
Hard monthly spend cap you set per org
SendGrid
No native hard cap on usage overages

What SendGrid is great at

SendGrid has been sending email at massive scale for over a decade. Its IP warm-up tooling, dedicated IPs, and enterprise deliverability consulting are genuinely strong, and its ecosystem of integrations is broad.

Why teams choose MailStack

Teams move to MailStack when SendGrid’s plan tiers stop fitting their volume — you pay for a plan bucket whether you use it or not, and overage pricing is opaque. MailStack bills strictly per email sent ($0.40 per 1,000 after the free tier) with the same SPF/DKIM/DMARC alignment, suppression lists, and event webhooks, plus a single API that returns a message id you can poll for status.

Pricing in a sentence

SendGrid sells monthly plan tiers (Essentials/Pro) with email caps; MailStack has no plan — you pay only for sends.

Try MailStack free

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

Read the quickstart → See pricing