Disposable email comes in two flavors: free browser tools for casual use, and APIs for developers and automation.
Free Temp Mail — Best For
- One-off signups to avoid spam
- Testing during manual QA
- Privacy on untrusted sites
- Receiving OTP codes
ZeroPhantom TempMail gives you an instant inbox, no signup, auto-refresh, fast delivery.
Paid API — Best For
- Automated testing of email verification flows
- CI/CD pipelines testing on every build
- Creating unique inboxes per test run programmatically
- High volume without rate limits
Key Difference
Free: Manual, one inbox at a time, browser only.
API: Programmatic, concurrent inboxes, full message content, custom domains, SLA on delivery speed.
inbox = create_inbox()
trigger_signup(email=inbox.address)
code = inbox.wait_for_message(timeout=30).extract_otp()When to Upgrade
If you run automated tests more than a few times per day the free service creates friction. The API pays for itself in hours saved within a week.
Start with free temp mail. Need the API? See TempMail API plans →