10 Best Temporary Email Services in 2026 — Compared and Ranked

The best temporary email services in 2026 are GoneBox, Temp-Mail.org, and Guerrilla Mail — but they serve very different audiences. GoneBox is the only one with both a REST API and an MCP Server for AI agents. Temp-Mail.org has the largest user base. Guerrilla Mail has been around since 2006 and is the most battle-tested.

We tested all 10 services in this list for inbox creation speed, message delivery reliability, API availability, AI agent compatibility, multilingual support, and privacy practices. Here's the full breakdown.

Quick Comparison Table

#	Service	Free	API	MCP	Languages	Speed	TTL
1	GoneBox	Yes	Yes	Yes	20+	<1s	1-24h
2	Temp-Mail.org	Yes	Paid	No	30+	~2s	Variable
3	Guerrilla Mail	Yes	Unofficial	No	10+	~3s	1h
4	10MinuteMail	Yes	No	No	5	~2s	10m
5	Mailinator	Freemium	Yes	No	1	~2s	Hours
6	ThrowAwayMail	Yes	No	No	3	~3s	48h
7	Mail.tm	Yes	Yes	No	5	~2s	Variable
8	YOPmail	Yes	No	No	10+	~3s	8 days
9	Maildrop	Yes	Yes	No	1	~2s	24h
10	DisposableMail	Yes	No	No	2	~4s	Variable

Detailed Reviews

1. GoneBox — Best Overall

Website: gonebox.email | Domains: gonebox.email, sumiu.email, nemexiste.email

GoneBox launched in 2026 with a thesis that temporary email needs to evolve beyond disposable web inboxes. It's the only service that combines a REST API for developers, an MCP Server for AI agents, and multilingual consumer domains — including two Brazilian Portuguese domains with humorous names ("sumiu" = "vanished," "nemexiste" = "doesn't even exist").

Pros:

• Full REST API with 4 pricing tiers (Free to Enterprise)
• MCP Server for Claude, Cursor, and other AI agents
• 20+ languages supported with localized UI
• Sub-second inbox creation on Cloudflare's edge network
• Clean, modern interface without intrusive ads on free tier

Cons:

• Newer service — smaller domain reputation compared to incumbents
• Receive-only (no sending)

2. Temp-Mail.org — Largest User Base

Temp-Mail.org is the most recognizable name in disposable email. It gets over 50 million monthly visits and supports 30+ languages. The UI is clean, and inbox creation is instant.

Pros:

• Massive domain pool (harder to block)
• Mobile apps for iOS and Android
• Browser extension available

Cons:

• API is paid-only, no free tier for developers
• No MCP Server or AI agent support
• Heavy advertising on the free tier

3. Guerrilla Mail — Most Battle-Tested

Operating since 2006, Guerrilla Mail has processed over 13 billion emails. It offers a unique feature: you can compose and send emails (not just receive). However, its interface feels dated.

Pros:

• Can send emails (unique among temp mail services)
• 20-year track record of reliability
• Open source

Cons:

• No official API (third-party wrappers exist but are unreliable)
• Dated UI/UX
• Domains are widely blocked by major services

4. 10MinuteMail — Simplest Option

The name says it all: you get 10 minutes. There's a button to extend by 10 more minutes. That's the entire product. Perfect for users who want zero complexity.

Pros:

• Dead simple — zero learning curve
• No ads on the core experience

Cons:

• 10-minute TTL is too short for many use cases
• No API
• Limited language support

5. Mailinator — Best for Teams

Mailinator targets QA teams and enterprises. All inboxes are public by default (anyone who knows the address can read it), which makes it unsuitable for privacy-sensitive use cases but convenient for shared testing.

Pros:

• Team-friendly: shared public inboxes
• API with webhook support
• Custom domain support on paid plans

Cons:

• Public inboxes = no privacy
• Expensive paid plans ($159+/mo)
• Free tier is very limited

6. ThrowAwayMail — Longest Free TTL

ThrowAwayMail keeps your inbox alive for 48 hours — the longest free TTL in this list. Good if you're waiting for a slow confirmation email.

Pros:

• 48-hour TTL on free tier
• Simple interface

Cons:

• No API
• Limited domains
• Occasional delivery delays

7. Mail.tm — Best Free API

Mail.tm offers a completely free REST API with no rate limits (as of 2026). It's popular with developers building side projects who don't need a paid service.

Pros:

• Free API with no stated rate limits
• Modern REST endpoints
• Active community

Cons:

• No SLA or uptime guarantee
• No MCP Server
• Limited domain selection

8. YOPmail — Longest Retention

YOPmail keeps emails for 8 days and doesn't require any setup. Type any address @yopmail.com and it works. The catch: all inboxes are public.

Pros:

• 8-day message retention
• No setup at all — just pick any address
• Multi-language support

Cons:

• Public inboxes (anyone can read your mail)
• No API
• Heavy ads

9. Maildrop — Developer Friendly, Minimal

Maildrop is open source and offers a basic API. It's a no-frills option for developers who want something simple and self-hostable.

Pros:

• Open source
• Basic REST API
• Self-hostable

Cons:

• Minimal documentation
• Small domain pool
• No paid support

10. DisposableMail — Basic and Functional

DisposableMail does the basics. You get an address, you receive mail, it eventually expires. Nothing remarkable, nothing broken.

Pros:

• Works reliably
• Clean interface

Cons:

• No API
• No distinguishing features
• Limited language support

Why GoneBox Wins in 2026

The temporary email market is fragmenting into two segments: consumer (web-only, ad-supported) and developer/AI (API-first, SaaS pricing). Most incumbents serve the first segment. GoneBox is the only service that credibly serves both:

• For consumers: Clean UI, 20+ languages, Brazilian humor domains, no intrusive ads
• For developers: REST API with 4 pricing tiers, comprehensive documentation
• For AI agents: The only MCP Server in the market — Claude, Cursor, and Windsurf can manage inboxes natively

The MCP Server is the biggest differentiator. As AI agents become the primary way people interact with software, having native AI integration isn't a nice-to-have — it's a competitive moat.

Frequently Asked Questions

Which temporary email service has the best API?

GoneBox has the most complete API with 4 pricing tiers (including a free tier with 100 requests/day). Mail.tm offers a free API with no stated limits but no SLA. Mailinator has a robust API but starts at $159/month.

Can AI agents use temporary email?

Yes, but only GoneBox offers an MCP Server that lets AI agents manage inboxes natively. With other services, you'd need to write custom HTTP integration code — which defeats the purpose of using an AI agent.

Which service is hardest to block?

Temp-Mail.org has the largest domain pool, making it harder for services to maintain a complete blocklist. GoneBox uses fewer domains but they are less commonly known, so they appear on fewer blocklists.