Postmark vs SendLayer

Postmark8.8Visit SendLayer8.1Visit

Higher score Postmark #1 in SMTP Relay Services 8.8/10 Free plan Free plan✓ 0 of 3 features Visit Postmark

vs

SendLayer #6 in SMTP Relay Services 8.1/10 Paid ✓ 1 of 3 features Visit SendLayer

• Postmark fits best

  Transactional teams needing streams and templates

• SendLayer fits best

  WordPress and commerce sites needing relay

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Side by side

Feature	Postmark 8.8/10 Visit ↗	SendLayer 8.1/10 Visit ↗
At a glance
Editor score	8.8	8.1
Ranking	#1 in SMTP Relay Services	#6 in SMTP Relay Services
Best for	Transactional teams needing streams and templates	WordPress and commerce sites needing relay
Pricing model	Free plan + paid	Paid
Starting price	$15/mo	$5/mo (best)
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Live chat, Docs	Tickets, Docs
Compliance	GDPR, 2FA	GDPR, 2FA
Integrations	12 integrations	1,000+ integrations
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Postmark 0/3 · SendLayer 1/3
Inbound email parsing	Not checked yet	Not checked yet
Event webhooks	Not checked yet	✓ (best)
Subaccounts	Not checked yet	Not checked yet
Specs
Monthly send limit	10000 emails/mo (best)	1000 emails/mo
Dedicated IP option	Not checked yet	Not checked yet
Email log retention	Not checked yet	Not checked yet
Our review
Pros	Separate transactional and broadcast message streams Inbound parsing with JSON webhooks and delivery events Reusable templates with previews, variables, and test sends	Supports both API and SMTP relay delivery Includes logs, tracking, bounce, and suppression management Integrates with WordPress, commerce platforms, and frameworks
Cons	Free plan allows only 100 emails per month Listed paid plans include 10,000 emails per month Dedicated IPs are limited to eligible high-volume customers	The verified monthly sending limit starts at 1,000 emails There is no free plan Scale pricing is quote-based
Our verdict	Postmark is an email delivery service for application teams sending transactional and broadcast messages through REST APIs or SMTP. It supports application email, individual or batch messages, reusable HTML and plain-text templates,… Read the review →	SendLayer is a transactional email delivery service for websites, applications, developers, and businesses. It accepts outgoing messages through an email API or SMTP relay, then provides delivery logs, open and click tracking, bounce… Read the review →

Strengths and trade-offs

• Postmark — where it wins

  • Separate transactional and broadcast message streams
  • Inbound parsing with JSON webhooks and delivery events
  • Reusable templates with previews, variables, and test sends

  Where it doesn't

  • Free plan allows only 100 emails per month
  • Listed paid plans include 10,000 emails per month
  • Dedicated IPs are limited to eligible high-volume customers

• SendLayer — where it wins

  • Supports both API and SMTP relay delivery
  • Includes logs, tracking, bounce, and suppression management
  • Integrates with WordPress, commerce platforms, and frameworks

  Where it doesn't

  • The verified monthly sending limit starts at 1,000 emails
  • There is no free plan
  • Scale pricing is quote-based

• Postmark8.8/10 · Free plan

  A focused SMTP and API service for transactional email, streams, templates, and events.

  Visit PostmarkFull verdict →
• SendLayer8.1/10 · Paid

  A focused relay service for website and application email, starting at $5 per month billed annually.

  Visit SendLayerFull verdict →