Resend or Postmark: which should you pick?

API plus marketing vs transactional purist. Free plans, pricing basis, automation and transactional email from each vendor's pricing page, plus who should pick which.

Resend free emails: 3,000/mo; Resend free emails
Postmark free emails: 100/mo; Postmark free emails
Lumail free emails: 3,000/mo; Lumail free emails

TL;DR

Postmark is the narrower, transactional-only service: 100 free emails a month, then $15 for 10,000, with inbound parsing. Resend's free tier is larger (3,000 transactional emails a month) and it also sells marketing contacts, broadcasts and automation runs on a separate plan. Pure receipts and resets: Postmark. App email plus some marketing on one vendor: Resend.

Resend vs Postmark side by side

Every Resend and Postmark cell comes from the vendor's public pricing page, verified on August 17, 2026. Lumail is the third column, as the alternative.

Resend vs Postmark comparison with Lumail
	Resend	Postmark	Lumail (alternative)
Free plan	3,000 emails/month for transactional, or 1,000 marketing contacts	100 emails/month on the free Developer plan	$0, 3,000 emails/month
Paid from	$20/month transactional; $40/month marketing	$15/month for 10,000 emails	$20/month, 40,000 included, then $0.60/1,000
Pricing basis	Separate transactional volume and marketing contact plans	Monthly email volume, not subscribers; extra emails billed per 1,000	Unlimited subscribers; pricing follows email volume
Automation	10,000 automation runs included; usage overage on paid plans	No journeys or drip builder; sequences live in your app	Graph workflows with triggers, branches, goals, exits, and A/B paths
AI and developer access	Developer API, SDKs, and AI-oriented documentation	Local MCP server with 24 tools, agent skills, and a CLI	ChatGPT OAuth, MCP, skills, CLI, SDK, REST API, and visual editor
Transactional email	Core product with REST API and SMTP	Core product, via REST API or SMTP	Included through API, SMTP, SDK, CLI, and agent tools
Publishing	Broadcasts and contacts, not a hosted newsletter publication	Server-side templates and broadcast streams; no newsletter editor	Capture pages and custom web domains; not a general website builder
Best for	Developers prioritizing transactional delivery and API ergonomics	Product engineering teams that need reliable transactional email from code	Teams that want campaigns, workflows and transactional email priced by volume

Choose Resend if

You want a bigger free tier: 3,000 transactional emails a month
You also want broadcasts and contacts from the same vendor
Resend's SDK and React Email ecosystem fit your stack

Choose Postmark if

Transactional email from code is all you need
You need inbound email parsing
You want Postmark's local MCP server, agent skills and CLI

Where Lumail fits

Postmark has no journeys and Resend sells marketing separately. Lumail runs transactional email, campaigns and workflows on one plan: $0 for 3,000 emails, then $20 for 40,000.

Lumail prices by emails sent, with unlimited subscribers on every plan: $0 for 3,000 emails a month, Premium at $20 a month for 40,000 emails then $0.60 per 1,000, and Business at $200 a month for 400,000 emails then $0.40 per 1,000. Campaigns, graph workflows and transactional email (API and SMTP) live in one account, and agents can run it through MCP, the CLI or the SDK.

Read the full Lumail vs Resend and Lumail vs Postmark breakdowns, or the long-form Resend and Postmark articles.

Start for free See Lumail pricing

Sources

Resend pricing, verified on August 17, 2026
Postmark pricing, verified on August 17, 2026

Frequently asked questions

Is Resend or Postmark cheaper?

Postmark is $15 a month for 10,000 emails. Resend's transactional plan is $20 a month. Resend's free tier is larger: 3,000 emails versus Postmark's 100.

Can Postmark send newsletters?

Postmark offers broadcast streams and server-side templates but no newsletter editor or journeys. Sequences live in your own app.

Do Resend and Postmark include transactional email?

Resend: Core product with REST API and SMTP. Postmark: Core product, via REST API or SMTP.

Is there an alternative to Resend and Postmark that prices by emails sent?

Lumail. It is $0 for 3,000 emails a month, then $20 a month for 40,000 emails and $0.60 per extra 1,000, with unlimited subscribers on every plan. Campaigns, workflows and transactional email share one account.

Where do these numbers come from?

From each vendor's public pricing page (Resend pricing and Postmark pricing), last verified on August 17, 2026. Prices change, so confirm on the vendor's page before you buy.

Keep comparing

Not sold on Resend or Postmark?

3,000 emails a month free. Unlimited subscribers on every plan. Campaigns, automations and transactional email on one domain.

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