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Honest comparison

Inboxical vs TestMail.app More features, better developer experience.

TestMail.app offers a solid email testing API. Inboxical goes further with Playwright/Cypress SDKs, long-polling, built-in OTP extraction, and webhooks on every plan.

What sets Inboxical apart

Both tools have REST APIs. Inboxical ships these extras on every plan.

Playwright SDK

First-class fixtures and helpers. No manual HTTP calls in your E2E tests.

Cypress SDK

Custom commands for inbox creation and message waiting. Zero boilerplate.

Long-polling wait

Block until the email arrives. No cy.wait(5000) or polling loops.

OTP extraction

Auto-extract 4-8 digit codes from email bodies. No regex needed.

Feature-by-feature comparison

Different tools for different jobs. Here is how they stack up for test automation.

FeatureInboxicalTestMail.app
Playwright SDK
Cypress SDK
OTP extraction
Long-polling wait
WebhooksStarter+
REST API
Custom domains
Team management
Free tier$0 (50/mo)$0 (100/mo)
Starting paid price$9/mo$29/mo
Self-host optionComing soon

Same test, both tools

With Inboxical, you get a purpose-built SDK. With TestMail.app, you write manual API calls.

Inboxical
// Inboxical — Cypress test
it('sends welcome email', () => {
cy.createInbox().then((inbox) => {
cy.visit('/register')
cy.get('[name=email]').type(inbox.email_address)
cy.get('[type=submit]').click()
// Long-polls — no arbitrary waits
cy.waitForMessage(inbox.id).then((msgs) => {
expect(msgs[0].subject).to.equal('Welcome!')
// OTP extraction built in
const otp = msgs[0].extracted_otp
expect(otp).to.have.length(6)
})
})
})
TestMail.app
// TestMail.app — manual API polling
it('sends welcome email', () => {
const tag = `test-${Date.now()}`
const email = `${tag}[email protected]`
cy.visit('/register')
cy.get('[name=email]').type(email)
cy.get('[type=submit]').click()
// No SDK — poll the API manually
cy.wait(5000) // hope email arrived
cy.request({
url: `https://api.testmail.app/api/json?apikey=${Cypress.env('TESTMAIL_KEY')}&tag=${tag}`,
}).then((res) => {
expect(res.body.emails[0].subject).to.equal('Welcome!')
// No OTP extraction — parse manually
const otp = res.body.emails[0].text.match(/\d{6}/)[0]
expect(otp).to.have.length(6)
})
})

The honest take

Different tools excel at different things. Here is the full picture.

Where TestMail.app wins

  • Higher free tier limit (100 emails/mo)
  • Tag-based email filtering
  • Established service with stable API
  • Simple and focused feature set

Where Inboxical wins

  • Playwright SDK with first-class fixtures
  • Cypress SDK with custom commands
  • Long-polling wait — no arbitrary delays
  • OTP extraction built into every plan
  • Webhooks for real-time assertions
  • 70% cheaper starting paid plan

TestMail.app is a solid, focused email testing API. Inboxical offers everything TestMail does plus purpose-built SDKs and automation features at a lower price point.

Start free — no credit card required.

Try Inboxical with 50 emails/month on the free plan. Get Playwright and Cypress SDKs from day one.