Unosend is a transactional email API service for developers. It uses credit-based pricing: $4 per credit, 1 credit = 10,000 emails, with no monthly subscription.

1 credit = 10,000 emails. Credits cost $4 each, are bought upfront, and are valid for 6 months.

What is the minimum purchase?

The minimum purchase is 5 credits ($20), which includes 50,000 emails. First-time purchases include a 10,000 email bonus.

Is Unosend better than Resend or SendGrid?

Unosend offers credit-based pricing, no monthly subscription, and a simpler REST API compared to alternatives like Resend and SendGrid.

What programming languages are supported?

Unosend works with any programming language via our simple REST API. Just make HTTP requests from JavaScript, Python, Go, PHP, Ruby, Java, or any other language.

How fast is email delivery?

Most emails are delivered within seconds. Unosend uses optimized infrastructure to ensure fast and reliable email delivery worldwide.

Compare

Unosend vs Postmark

Postmark is known for reliable transactional email. Unosend is built for teams that want that same transactional focus with credit-based pricing, batch sending, and lower costs at common volume tiers.

Pricing

Pricing comparison

Tier	Unosend	Postmark
10K emails	$4	$15/mo
50K emails	$20	$65/mo
100K emails	$40	$125/mo
250K emails	$100	$245/mo
500K emails	$200	$445/mo
1M emails	$400	Custom
Credit validity	90 days	Use-or-lose monthly

Features

Feature comparison

Feature	Unosend	Postmark
Pricing model	Pay-as-you-go credits	Monthly subscription
Free tier	100 emails/day
Unused email rollover	90-day validity
Inbound email parsing
Email templates	Drag & drop builder
Dedicated IP	$30/mo add-on	$50/mo add-on
Analytics retention	30 days	45 days
Custom domains	Unlimited	10 (paid)
Batch sending
REST API and SMTP

Ready to switch?

Get started in minutes — 3,000 free credits, no card required.

vs Resend vs SendGrid vs Mailgun