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Honest comparison

Inboxical vs Ethereal Email A real API, not a fake SMTP server.

Ethereal Email is a free fake SMTP service — great for quick manual checks. Inboxical is a full email testing API with SDKs, long-polling, OTP extraction, and CI/CD integration.

What Ethereal Email can't do

Ethereal is a free tool for manual email checks. These features require a real API.

REST API

Full REST API for programmatic inbox creation, message retrieval, and assertions.

Test Framework SDKs

First-class Playwright and Cypress SDKs. No manual HTTP calls in your E2E tests.

Long-polling wait

Block until the email arrives. No manual browser checking 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.

FeatureInboxicalEthereal
Playwright SDK
Cypress SDK
OTP extraction
Long-polling wait
WebhooksStarter+
REST API
SMTP supportComing soon
Web UI preview
CI/CD integrationManual
Programmatic inbox creation
Free tier$0 (50/mo)Free (unlimited)
Starting paid price$9/moFree only
Self-host optionComing soon

Same test, both tools

With Inboxical, you get a purpose-built SDK. With Ethereal, you send manually and check the browser.

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)
})
})
})
Ethereal
// Ethereal — manual SMTP test
const nodemailer = require('nodemailer')
// Create throwaway account
const account = await nodemailer.createTestAccount()
const transport = nodemailer.createTransport({
host: 'smtp.ethereal.email',
port: 587,
auth: { user: account.user, pass: account.pass }
})
// Send email manually
await transport.sendMail({
from: '[email protected]',
to: account.user,
subject: 'Welcome!',
text: 'Your OTP is 123456'
})
// Check results? Open the browser:
// https://ethereal.email/messages
// No API to query messages programmatically

The honest take

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

Where Ethereal wins

  • Completely free with no limits
  • No account or API key needed
  • Built into Nodemailer ecosystem
  • Quick manual email checks

Where Inboxical wins

  • Full REST API for programmatic access
  • Playwright and Cypress SDKs
  • Long-polling — no manual checking
  • OTP extraction built in
  • Webhooks for real-time assertions
  • Works in CI/CD pipelines

If you need to quickly check what an email looks like during development, Ethereal is perfect. If you need to verify emails arrive correctly in automated tests, Inboxical is built for that.

Start free — no credit card required.

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