Documented scope and limits; unverified dimensions remain unknown.
RequirementSMTP2GOResend
Pricing
Who it is for
Email delivery for transactional email from apps, everyday email from Outlook and marketing email with an unsubscribe link.

Verified Oct 11, 2026 · SMTP2GO homepage

Sends application email, such as password resets and order confirmations, through the /emails API; marketing broadcasts use a separate API.

Verified Oct 11, 2026 · Resend: official product and plan documentation

Coverage limits
The free plan is limited to 200 emails a day and does not allow extra emails.

Verified Oct 11, 2026 · SMTP2GO pricing, loaded monthly plan cards

Every account starts at 10 API requests per second, whatever the plan; an increase goes through support.

Verified Oct 11, 2026 · Resend help: account quotas and limits

Sending volume
  • Free 1,000 emails per month
  • Starter 10,000 emails per month
  • Professional 100,000 emails per month
  • Premier More than 3,000,000 emails a month
Paid plans have no daily cap, but received emails and every To, CC and BCC recipient count toward the monthly quota.

Verified Oct 11, 2026 · Resend help: account quotas and limits

  • Free 3,000 emails per month
  • Pro 50,000 emails per month
  • Scale 100,000 emails per month
Sender domains
SPF and DKIM are set up automatically for your sending domains.

Verified Oct 11, 2026 · SMTP2GO homepage

Pro and Scale can add 100 more domains for USD 20 a month; Enterprise limits are set by contract.

Verified Oct 11, 2026 · Resend help: account quotas and limits

  • Free 3 verified domains
  • Pro 10 domains
  • Scale 1,000 domains
Log retention
  • Free 5 days of email reporting
  • Starter 30 days of email reporting
  • Professional 30 days of email reporting
Free and Pro: 30-day data retention.

Verified Oct 11, 2026 · Resend: official product and plan documentation

  • Scale 30 days
Webhooks and eventsNot verified
Pro: 5 webhook endpoints.

Verified Oct 11, 2026 · Resend: official product and plan documentation

  • Free 1 webhook endpoint
  • Scale 10 webhook endpoints
Dedicated IP
  • Professional Dedicated IP address included
USD 30 a month add-on on Scale for customers sending more than 3,000 emails a day; Resend warms up, monitors and scales the IP.

Verified Oct 11, 2026 · Resend: official product and plan documentation

Support
Starter: ticket, chat and phone support.

Verified Oct 11, 2026 · SMTP2GO: official product and plan documentation

  • Free Ticket support; toll-free phone and live chat for the first 14 days only
  • Professional Ticket, chat and phone support
Slack support and an urgent-response SLA are not included on Free or Pro.

Verified Oct 11, 2026 · Resend: official product and plan documentation

  • Free Ticket support
  • Scale Dedicated Slack channel
  • Enterprise Guaranteed response times, a dedicated CSM and personalized migration support
Overage charges
  • Free Extra emails are not permitted on Free.
Paid plans can keep sending past the monthly quota with pay-as-you-go, capped by default at 5 times the quota; sending then pauses until the next billing cycle.

Support can adjust the cap.

Verified Oct 11, 2026 · Resend help: account quotas and limits

  • Pro Pay-as-you-go is switched on in team settings and bills extra emails in buckets of 1,000; without it, Resend notifies you and offers an upgrade.
Coverage note

At the default volume shown.

All webhook event types are available on every plan.