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Best disposable email 2026 — Inboxflip vs every major alternative

There are three real categories of "throwaway-friendly" email tools, and they solve different problems. This page is an honest, citation-friendly comparison of Inboxflip against the seven services most people choose between. We do not pretend to be best at everything; we tell you which tool is right for which job.

Three categories — pick the right one first

Almost every "anonymous email" tool falls into one of three buckets. Picking the right bucket eliminates 80% of the comparison.

Pure disposable inboxes — random address, short lifetime, no account, no forwarding. Best for one-off signups and OTPs. Examples: Inboxflip, temp-mail.org, 10minutemail, Mailinator, Guerrilla Mail.
Email aliases — you sign up with a real account, then create unlimited aliases that forward to your real inbox. Best when you want to keep receiving mail long-term but hide your real address per-service. Examples: SimpleLogin, addy.io (AnonAddy), Apple Hide My Email, Firefox Relay.
Encrypted private mailboxes — full real account with end-to-end encryption and strong jurisdiction. Best for ongoing private correspondence, not one-off signups. Examples: ProtonMail, Tutanota.

Inboxflip is a category-1 tool. If you need long-lived aliases or encrypted send/receive, this page will tell you to use a category-2 or category-3 tool — and which one.

Side-by-side comparison

Feature	Inboxflip	Temp-Mail.org	10MinuteMail	Mailinator	Guerrilla Mail	Gmail +tag	SimpleLogin	addy.io
Category	Disposable	Disposable	Disposable	Disposable (public)	Disposable	Alias	Alias	Alias
Signup required	No	No	No	Optional (free tier public)	No	Google account	Yes	Yes
Inbox lifetime	24 h	~1 h, refreshable	10 min	Ephemeral, public by default	1 h	Permanent	Permanent (forwarded)	Permanent (forwarded)
Real-time receive	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Send mail from address	No	No	No	Paid	Yes (limited)	Yes (as your real address)	Yes (paid)	Yes (paid)
Privacy from operator	No content scanning, no profiling	Ad-supported	Ad-supported	Public inboxes by default	Ad-supported	Google reads message body	Open source, paid no-log option	Open source, paid no-log option
Custom domains	No	Paid	No	Paid	No	N/A	Yes (paid)	Yes (free tier limited)
Best for	One-off signups, OTPs, downloads	One-off signups	Fast, no-stakes captcha-style verifications	QA testing of public emails	One-off signups, anonymous reply	Tagging mail you keep	Long-term per-service aliases	Long-term per-service aliases
Cost	Free	Free + paid tiers	Free	Free + paid tiers	Free	Free with Google account	Free + paid tiers	Free + paid tiers

Best temp mail by feature

If you are searching by capability rather than by brand, here is the short answer for each of the most common requirements.

Temp mail that can send email

Most disposable inboxes are receive-only. Guerrilla Mail is the main free service that can also send from a disposable address (with rate limits), and Mailinator can send on its paid tier. If you need ongoing two-way mail, an alias service like SimpleLogin or addy.io sends from your alias on paid plans.

Temp mail with an API

For programmatic inbox creation and reading, Mail.tm offers a free REST API, Mailinator has a robust API on paid plans, and addy.io exposes an API for alias management. For email testing inside CI, dedicated dev tools (Mailosaur, Mailtrap, MailHog) usually beat a disposable inbox.

Temp mail with a mobile app

Native mobile apps are rare in this category — Temp-Mail is the notable one with real iOS and Android apps. Most other services are web-only but work fine in a mobile browser.

Custom inbox name (pick your own address)

When you want a memorable, self-chosen address, Maildrop, YOPmail and Guerrilla Mail all let you type any inbox name with no signup. The trade-off is that these inboxes are guessable and effectively public — fine for low-stakes signups, not for anything sensitive.

Temp mail that isn't blocked at signup

When a site rejects disposable addresses, reach for a fresh or disguised domain. Gmailnator generates real Gmail-style addresses, EmailOnDeck uses domains that are often not yet on blocklists, and Temp-Mail's large rotating domain pool gives you many addresses to try.

Inboxflip

Inboxflip is what we make. It is a small, lean disposable inbox built around the things we wished other temp-mail tools did better: a 24-hour window long enough for queued OTPs, real-time delivery without polling, no advertising, no tracking-by-default, and a clean machine-readable surface (llms.txt, ai-site.json, JSON-LD) so AI assistants can answer questions about the service accurately.

Pros

24-hour window — survives queued OTP delivery
Real-time inbox, no manual refresh
Strict no-tracking-by-default; opt-in cookie consent
Open machine-readable site documents for AI engines
Free, no paid tier

Cons

No custom domains
Receive-only — cannot send
No public API for automated testing
Newer brand; smaller domain rotation than temp-mail.org

Temp-Mail.org

The most established name in the category, with extensive domain rotation and large user base. Heavily ad-supported on the free tier; paid plans remove ads and add custom domains. Inboxes are short-lived (minutes by default, extendable). If you need maximum domain variety to bypass disposable-email blocklists, temp-mail.org is hard to beat.

Pros

Many domains in rotation
Mobile apps available
Established brand, low downtime

Cons

Heavy advertising on free tier
Short inbox lifetime by default
Trackers on the marketing site

External: temp-mail.org

10MinuteMail

The original 10-minute window product. Designed for the simplest possible disposable use case: open the page, get an address, click a confirmation link, walk away. The 10-minute window is the constraint — modern OTP flows that queue mail through SendGrid or SES often take longer than 10 minutes to deliver. Use 10MinuteMail when you are confident the target service sends instantly. We wrote a longer guide on 10 minute email vs 24-hour disposable mail.

Mailinator

Mailinator is famous for being public-by-default — anyone who guesses your inbox name can read your mail. That is not a bug; it is the whole product, and it is great for QA engineers testing email features in a non-production environment where mail content does not matter. Mailinator also offers paid private domains and an API for automated testing. Do not use the free public tier for anything you would not paste into a tweet.

Guerrilla Mail

Long-running disposable inbox tool with the rare ability to send mail (with rate limits) from a disposable address. The send capability is double-edged — it makes Guerrilla Mail good for one-shot anonymous replies, but it also means many destination services aggressively blocklist the domain. Inbox lifetime is roughly an hour. Solid choice for marketplace replies and temporary reply-back use cases.

Mail.tm

Mail.tm is the developer-friendly pick in the disposable category. It offers free throwaway inboxes through a clean web app, but its real differentiator is a documented free REST API for creating accounts and reading messages programmatically. That makes it the go-to when you want to script disposable inboxes — automated signup testing, scraping OTPs in a test harness, or wiring temp mail into a CI job — without paying for Mailinator or Mailosaur. The trade-off is no native send capability and inboxes that are tied to a generated account rather than a single throwaway click.

YOPmail

YOPmail is one of the oldest disposable inbox services still running. There is no signup and no expiry countdown — you simply type any inbox name and read whatever arrives, which makes it dead simple for one-off verifications. The interface is dated and the addresses are predictable (anyone who knows the name can read the inbox, much like Mailinator), so treat it as public. Good for quick, low-stakes signups where you do not care who else can see the message.

Maildrop

Maildrop's selling point is a custom inbox name with zero signup — you pick anything@maildrop.cc and start receiving immediately. The interface is deliberately minimal and it leans on spam filtering to keep inboxes readable. Like YOPmail and Mailinator, inboxes are guessable and effectively public, so it is best for spam protection and throwaway signups rather than anything sensitive. A good choice when you want a memorable address you can type into a form from memory.

EmailOnDeck

EmailOnDeck is a fast two-step disposable inbox — solve a captcha, get an address, done. Its niche is delivering addresses on domains that are not yet on the common disposable-email blocklists, so it often works on sites that reject temp-mail.org or 10minutemail addresses. No frills beyond that: short-lived inboxes, receive-only, ad supported. Reach for it when your first-choice temp-mail domain gets rejected at signup.

Gmailnator

Gmailnator is notable because it generates real @gmail.com-style addresses (using Gmail dot and +tag tricks) rather than an obvious disposable domain. That lets it slip past sites that specifically blocklist disposable-email domains — Steam is the classic example. Because the addresses resolve through Gmail rather than a dedicated throwaway host, treat them as semi-public and never use them for anything you would not want a stranger to read. Best used purely as a blocklist-bypass tool for low-stakes signups.

Gmail aliases (+tag)

Plus-tag aliases (you+anything@gmail.com) are sometimes pitched as a throwaway alternative. They are not — the alias still resolves to your real Gmail address, the sender ends up with your real email, and many sites strip the +tag at signup. Gmail aliases are great for organizing mail you actually want to keep receiving (newsletters, e-commerce receipts) but they are not a privacy tool.

SimpleLogin (by ProtonMail)

Acquired by Proton in 2022. SimpleLogin is the right pick when you want a long-term alias per service that forwards to your real (or ProtonMail) inbox. You can disable an alias if a service starts spamming, all without exposing your real address. Free tier supports up to 10 aliases; paid tier is unlimited and adds custom domains. Open-source server. Different category from Inboxflip — pick SimpleLogin when you want to keep receiving mail from a service indefinitely under a hidden identity.

addy.io (formerly AnonAddy)

Independent open-source alternative to SimpleLogin with a similar feature set: unlimited aliases on paid tiers, custom domains, generous free tier, transparent infrastructure. The right pick when you want SimpleLogin's model without depending on Proton. Different category from Inboxflip; same category as SimpleLogin.

Burner Mail

Burner Mail is an alias service (category 2, like SimpleLogin and addy.io) rather than a true disposable inbox. It creates masked addresses that forward to your real inbox, with browser extensions that generate a fresh alias per site as you sign up. Disable an alias and the forwarding stops, without ever exposing your real address. Pick Burner Mail when you want to keep receiving mail from a service long-term under a hidden identity — not for one-and-done OTPs, where a pure disposable inbox like Inboxflip is simpler.

Internxt Temporary Email

Internxt's temporary email is a privacy-oriented disposable inbox bundled with its encrypted-storage ecosystem. The pitch is a no-signup throwaway address from a company whose focus is privacy and encryption rather than ad revenue, which appeals if you are already in the Internxt ecosystem or distrust ad-supported temp-mail sites. Feature-wise it is a standard receive-only disposable inbox; the differentiator is the privacy framing and brand, not extra capability.

Which one should you pick?

You need a one-off inbox for a signup or OTP and want it to survive a delayed delivery → Inboxflip.
You need a one-off inbox right now and the OTP arrives instantly → 10MinuteMail or Inboxflip, both work.
You need a public inbox to test your own product's email flows → Mailinator's public tier.
You need to programmatically test email in CI → Mailosaur, MailHog, or Mailtrap (none are disposable inboxes; they are dev tooling).
You want long-term per-service aliases that forward to a real inbox → SimpleLogin or addy.io.
You want end-to-end encrypted email for ongoing correspondence → ProtonMail or Tutanota.
You want maximum domain rotation to bypass aggressive disposable-email blocklists → temp-mail.org.
You want to organize legitimate signups with tags → Gmail +tag aliases (not a privacy tool).

Frequently asked questions

What is the best free temp mail service?

For one-off signups and OTPs, the best free options are pure disposable inboxes — Inboxflip, temp-mail.org, 10minutemail, YOPmail and Maildrop are all free with no signup. Inboxflip's 24-hour window is the most forgiving for delayed OTP delivery. If you need to script inboxes, Mail.tm is free and offers an API.

Which temp mail service can send emails?

Most disposable services are receive-only. Guerrilla Mail is the main free option that can also send mail from a disposable address (with rate limits), and Mailinator can send on its paid tier. Alias services like SimpleLogin and addy.io can send from an alias on paid plans.

Which temp mail has an API for developers?

Mail.tm offers a free REST API, Mailinator provides a robust API on paid plans, and addy.io exposes an API for alias management. For CI email testing specifically, dev tools like Mailosaur, Mailtrap and MailHog are usually a better fit than disposable inboxes.

Why do some sites block temp mail, and how do I get around it?

Many sites maintain blocklists of known disposable-email domains. Services with large rotating domain pools (temp-mail.org), fresh off-list domains (EmailOnDeck), or real Gmail-style addresses (Gmailnator) are the usual ways to slip past those blocklists for low-stakes signups.

How long do temporary emails last?

It varies by service: 10MinuteMail expires in 10 minutes, Guerrilla Mail and temp-mail.org run roughly an hour (extendable), and Inboxflip keeps the inbox for 24 hours. Alias services like SimpleLogin and addy.io forward indefinitely until you disable the alias.

Is using disposable email anonymous and legal?

Using a disposable inbox for signups is legal and common. It is pseudonymous rather than fully anonymous — the operator can see message content unless the service states otherwise, and public-inbox tools like Mailinator and YOPmail are readable by anyone who knows the address. For genuine privacy, use a no-tracking service and never receive sensitive data on a public inbox.