$/transactional-email-api providers ↗
hub · testing

Email testing and dev tools

Local SMTP catchers and staging inboxes that capture outgoing email so it never reaches a real recipient. Use them in dev, staging, and CI.

Local SMTP catchers and staging inboxes for development.

ranking

Best email testing tools

Local SMTP catchers and staging inboxes for safe development.

Full ranking →
  1. 01

    Mailpit

    Testing

    Modern, actively maintained, drop-in for MailHog.
  2. 02

    Mailtrap

    Transactional Testing

    Hosted staging inbox with team collaboration.
  3. 03

    Ethereal Email

    Testing

    Throwaway accounts via API. Perfect for CI.
  4. 04

    MailDev

    Testing

    Solid for Node-only stacks.
  5. 05

    MailCatcher

    Testing

    Familiar in Rails projects; slower development pace.
all providers in this category

Directory (10)

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Mailtrap

Transactional Testing

Originally a staging inbox, now a sender too.

free tier
4,000/mo (sending), free testing tier
starts at
$15/mo for 10,000 sending

Mailpit

Testing

Modern local SMTP catcher.

free tier
Free, MIT-licensed
starts at
Free

MailHog

Testing

Classic local SMTP catcher (unmaintained since 2020).

free tier
Free, MIT-licensed
starts at
Free

MailCatcher

Testing

Tiny Ruby-based local SMTP catcher.

free tier
Free, MIT-licensed
starts at
Free

MailDev

Testing

Node-based local SMTP catcher.

free tier
Free
starts at
Free

Ethereal Email

Testing

Throwaway SMTP accounts on demand.

free tier
Free
starts at
Free

MailSlurp

Testing Inbound

Programmable inboxes for testing, inbound workflows, and email automation.

free tier
No permanent free plan listed on the current public pricing page
starts at
$19.99/mo Starter

Litmus

Testing

Email client previews and pre-send QA across 100+ inbox environments.

free tier
7-day free trial; no permanent free tier on the main paid plans
starts at
Basic plan listed on the public pricing page; exact figure varies by region and is sales-driven on higher tiers

Email on Acid

Testing

Email previews and pre-deployment QA across 90+ clients.

free tier
7-day free trial; no permanent free tier
starts at
Email Pro plan listed on the public pricing page; Enterprise is quote-based

Parcel

Testing Templates

Code-first email editor with live previews across major clients.

free tier
Free tier for individuals with limited preview seats
starts at
Team plans listed on the public pricing page