Complete observability.
Test emails your way. Use the API for automated testing, or just check emails in the dashboard — no code required. Perfect for CI/CD pipelines, manual QA, or solo devs testing their apps.
Active Inboxes
Simple to Use.
Powerful When You Need It.
Create a test inbox in seconds. Check emails in the dashboard or automate with our API. Works with any stack — or no stack at all.
Isolated & Thread-Safe
Each createInbox() generates a unique
email and SMTP credential set. No cross-contamination.
Zero-Config SMTP
We handle the SMTP infrastructure. You just grab
the username and password from the response.
Template Matching
Verify content using Mustache syntax or Regex. Extract magic links and OTPs instantly.
Native SDKs & Integrations:
// npm install @dev-inbox/client-api import { MailboxesApi, MessagesApi } from '@dev-inbox/client-api'; // 1. Create isolated inbox const inbox = await mailboxesApi.createMailbox(); // 2. Trigger auth flow with unique email await page.fill('#email', inbox.data.key + '@devinbox.io'); // 3. Verify OTP instantly via API const msg = await messagesApi.getLastMessage(inbox.data.key);
# 1. Generate ephemeral SMTP credentials inbox = client.create_inbox() # 2. Inject into app & send verification app.config.smtp = inbox.smtp_credentials app.send_verification(inbox.email) # 3. Assert content matches template msg = inbox.wait_for(subject="Verify") assert "Welcome" in msg.html
# 1. Create inbox via REST API curl -X POST https://api.devinbox.io/inboxes # 2. Response includes unique SMTP creds { "email": "test_8f92@devinbox.io", "smtp_user": "user_8f92", "smtp_pass": "sec_99a8d..." }
Mobile Testing?
We've got you covered.
Automate your React Native and Flutter email authentication flows. Generate test accounts on the device, perform actions, and verify emails without ever leaving the test runner.
// npm install @dev-inbox/client-api import { MailboxesApi, MessagesApi } from '@dev-inbox/client-api'; // Create inbox for mobile testing const inbox = await mailboxesApi.createMailbox(); // Fill Native Input await element(by.id('email_input')).typeText(inbox.data.key + '@devinbox.io'); // Wait for email & verify via API const msg = await messagesApi.getLastMessage(inbox.data.key);
// Flutter Integration Test final inbox = await DevInbox.create(); await tester.enterText(find.byType(TextField), inbox.email); await tester.tap(find.text('Sign Up')); // Verify Email Arrival final email = await inbox.waitForEmail(subject: 'Welcome'); expect(email.body, contains('Verification Code'));
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Frequently Asked Questions
Do I need CI/CD or automated tests to use DevInbox?
Do I need CI/CD or automated tests to use DevInbox?
Not at all! Many developers use DevInbox simply to get a private email address for testing their app manually. Just create an inbox, use the email address in your app, and check incoming emails in our dashboard. The API and automation features are there when you need them, but they're completely optional.
How does DevInbox help with integration testing?
How does DevInbox help with integration testing?
DevInbox provides a REST API that allows you to create disposable email addresses programmatically. You can then trigger your system to send emails to these addresses and verify the content, recipients, and timing through our API. This makes it easy to automate email testing in your CI/CD pipeline.
Can I use DevInbox with Playwright or other testing frameworks?
Can I use DevInbox with Playwright or other testing frameworks?
Absolutely! DevInbox integrates seamlessly with Playwright, Selenium, Cypress, and other testing frameworks. You can generate unique email addresses for each test run, ensuring test isolation and preventing conflicts between parallel test executions.
How long are emails retained in the system?
How long are emails retained in the system?
Email retention varies by plan: Developer (1 hour), Team (24 hours), Business (7 days), and Enterprise (15 days). This ensures you have enough time to verify your tests while keeping storage costs manageable. All emails are automatically purged after the retention period.
Is my email data secure and private?
Is my email data secure and private?
Yes, absolutely. All emails are encrypted in transit and at rest. We never share your data with third parties. Each inbox is completely isolated, and emails are automatically deleted after the retention period for your plan.
Can I use my own custom domain for email addresses?
Can I use my own custom domain for email addresses?
Yes! All paid plans include custom domain support. Simply add your domain, configure the required DNS records (MX, SPF, DKIM), and start generating email addresses like test@yourdomain.com. This is perfect for staging environments and realistic testing scenarios.
What's the difference between DevInbox and other email testing services?
What's the difference between DevInbox and other email testing services?
DevInbox is built specifically for CI/CD automation with sub-second inbox creation, thread-safe isolation, and comprehensive API access. Unlike traditional email testing tools, we provide real SMTP credentials, webhook support, and are designed for high-scale parallel test execution.
Does DevInbox work with mobile app testing?
Does DevInbox work with mobile app testing?
Absolutely! DevInbox works great with React Native, Flutter, and native iOS/Android testing frameworks. Generate test email addresses programmatically, trigger authentication flows in your app, then verify email delivery through our API - all without leaving your test environment.
Can I upgrade or downgrade my plan anytime?
Can I upgrade or downgrade my plan anytime?
Yes, you can upgrade or downgrade your plan at any time. Upgrades take effect immediately with prorated billing. When downgrading, the change takes effect at your next billing cycle, so you keep your current plan's benefits until then. The free Developer plan has no time limits.
Simple, transparent pricing. Generous free tier.
Start free with unlimited sandboxes, webhooks, and forwarders. Upgrade when you need more operations or longer email retention.
Developer
POPULAR FOR SOLO DEVSEverything you need to test your app
For individual hacking.
Get Started- 1,500 operations/mo
- Unlimited Sandboxes
- 1hr Email Retention
- 1 Custom Domain
- Unlimited Forwarders
- Unlimited Webhooks
- API Access
- Google Auth
- Community Support
Team
For small collaborative teams.
Sign Up- 10,000 operations/mo
- Unlimited Sandboxes
- 24hr Email Retention
- 3 Team Users
- Unlimited Custom Domains
- Unlimited Forwarders
- Unlimited Webhooks
- Email Support
Business
Scalable volume for growing businesses.
Get Started- 25,000 operations/mo
- Unlimited Sandboxes
- 7-Day Email Retention
- Unlimited Team Users
- Unlimited Custom Domains
- Unlimited Forwarders
- Unlimited Webhooks
- Email Support
Enterprise
Dedicated capacity & support.
Contact Sales- 100,000 operations/mo
- Unlimited Sandboxes
- 15-Day Retention
- Unlimited Team Users
- Unlimited Custom Domains
- Unlimited Forwarders
- Unlimited Webhooks
- SSO Integration
- Email Support
What counts as an operation?
1) Any email received, forwarded, or webhook triggered is counted as a single operation by the SMTP Server.
2) Any call to the API server (for example the verification of the last message received) counts as a single operation.
*Rate limiting applies to all plans.