Best Temporary Email Services in 2025

How we tested

We sent verification emails from ten real services (Stripe, GitHub, Notion, Netflix, Reddit, Shopify, Slack, LinkedIn, Twitch, and Discord) to a fresh inbox on each provider, then measured time-to-arrival, OTP extraction accuracy, and usability. We also reviewed each service's privacy policy and tested any available developer API. Tests were run in September 2025.

TempMailGrab

Inbox TTL: 24 hours. OTP extraction: Yes, automatic. API: REST API with webhook support. Privacy: No account required, session-cookie ownership, encrypted at rest.

TempMailGrab delivered all ten test emails. Average delivery time was 3.1 seconds from send to visible in the inbox, driven by real-time WebSocket push rather than polling. One-time codes were extracted from nine of ten emails automatically — the one miss was a service that embedded the code inside an image rather than plain text.

The developer REST API is well-documented and handles the full lifecycle: create inbox, poll or subscribe via webhook, retrieve structured JSON with extracted_otp and extracted_links fields. The API is the most capable of any service tested. The browser UI is fast, clean, and works well on mobile.

Best for: Privacy-conscious users, developers, anyone receiving OTP codes regularly.

temp-mail.org

Inbox TTL: Approximately 1 hour. OTP extraction: No. API: Unofficial/undocumented. Privacy: Account optional, has advertising.

temp-mail.org is one of the oldest and most recognized disposable email services. It delivered all ten test emails with an average time of 8.7 seconds. The inbox refreshes by polling every few seconds, which creates a noticeable lag compared to WebSocket-based alternatives. There is no OTP auto-extraction — you read the email manually. The unofficial API is widely used but not supported or documented by the operator.

The service displays advertising and the privacy policy grants broad data use rights. For low-stakes sign-ups where you just need the verification link to click, it works fine.

Best for: Casual one-time use, users already familiar with the interface.

10minutemail.com

Inbox TTL: 10 minutes (extendable). OTP extraction: No. API: No. Privacy: No account required, ad-supported.

10minutemail delivered nine of ten test emails. One email from a financial service did not arrive within the test window — likely a domain blocklist. Average delivery time was 11.2 seconds. The inbox expires after 10 minutes but can be extended with a button click. There is no API and no OTP extraction. The service is straightforward and widely known, which also means it appears on more blocklists than newer alternatives.

Best for: Quick sign-ups where you just need a confirmation link and can act within the time limit.

Guerrilla Mail

Inbox TTL: 1 hour (public inbox, no session ownership). OTP extraction: No. API: Unofficial. Privacy: Public inbox model — anyone who knows the address can read the mail.

Guerrilla Mail delivered all ten test emails with an average time of 6.4 seconds. The key differentiator is the public inbox model: Guerrilla Mail addresses are accessible to anyone who knows the address, because the inbox ID is part of the URL rather than a private session. This is intentional design — the service was originally built for sharing — but it means it is not appropriate for any verification that contains sensitive information.

Guerrilla Mail does offer a custom address feature, which is useful when a service rejects random-looking addresses. The unofficial API is widely used in test automation scripts.

Best for: Situations where you want to share an inbox with a team, or where a custom-looking address is required. Not suitable for security-sensitive verifications.

Mailinator

Inbox TTL: Public, no guaranteed TTL. OTP extraction: No. API: Yes (paid plans). Privacy: Public inboxes — all mail is publicly readable.

Mailinator is a developer-focused service with public inboxes. Any email sent to anything@mailinator.com is publicly readable by anyone. The paid plans add private domains, a proper REST API with webhook support, and team features. It is widely used in enterprise QA environments on the paid tier.

On the free tier, the public inbox model makes it unsuitable for any privacy-sensitive use. For testing, the free tier works well for low-sensitivity verification flows in development environments.

Best for: Enterprise QA teams with a paid Mailinator plan; quick throwaway testing on the free tier where privacy is not a concern.

Summary

For most users, TempMailGrab is the clear choice: fastest delivery, automatic OTP extraction, a real developer API, and private inboxes — all free. For a focused head-to-head with temp-mail.org, see our full comparison page. For teams running high-volume automated testing against a paid plan, Mailinator's enterprise tier is a strong alternative. For casual sign-ups where you just need to click a link, any of the free services will do.