Best Captcha Solvers for Sign-Up Automation
Seven captcha solvers ranked for sign-up automation on failed-solve billing, free trials, API design and coverage, plus how to pair one with an email API.
Your inbox is empty
Waiting for incoming emails. No need to refresh.
Need a real phone number for OTP verification?
Get one instantly →Email History
OTP Verification
Need a real phone number for OTP verification? Get one instantly from our partner.
Get phone number →Inbox
Choose a username and domain above. Your inbox is live the moment you do — no signup, no ads, no waiting.
Live stats
Real-time flow of temporary emails. Queued = delivered · Denied = blocked by filters.
Queued
Denied
Temp mail by FreeCustom.Email — create a free temporary email address instantly. Use a disposable email to receive OTP and verification codesEvery app, trial, and forum wants your email address — and hands it straight to marketers. FreeCustom.Email gives you a real, working temp mail inbox on a custom domain in seconds, so your personal address stays private. No registration. Works instantly.
Temp Mail — Free Disposable Email Address, No Signup, No Ads.
Use it however you need: a fake email generator for sign-ups you don't trust, a burner email for one-time verification codes, or a throwaway address for newsletters and downloads. Each one is a real, working temporary mail inbox with a random email address ready the moment the page loads, and it's a free email address that never asks for your name or phone number.
Forever free, completely ad-free, and built for speed. Read about our free & ad-free promise and the architecture behind our speed.
How it works
FreeCustom.Email generates disposable email addresses so you can receive emails, verification codes, and sign-up links without using your real inbox. Google Sign-In is used only to save your inbox history and manage your subscription — we never access your Gmail, contacts, or any Google data.
Building something? API Overview →
A temporary email address (also called disposable email, temp mail, fake mail or a burner email) is a short-lived inbox you use in place of your real address for sign-ups, trials, and one-off verifications. Once you're done, discard it — no spam, no tracking, no risk. A one-time email like this is ideal for receiving OTP codes, verification links, and test registrations without exposing your primary inbox. Learn how to create a temp mail address in seconds.
FreeCustom.Email works instantly without an account. Sign in to unlock saved inboxes, attachments, and custom domains.
No account needed. Get an instant one-time email address with 12-hour email storage. No registration required.
Sign in for more control: 24-hour email storage, 1MB attachments, saved inboxes, and a custom email prefix.
Use your own domain (e.g. @your-company.com) as a temporary email address. Get 5GB permanent cloud storage, 25MB attachments, automatic OTP extraction, and full API access.
All domains below support instant disposable email inbox creation and real-time delivery. Using a less-known domain reduces the chance of it being blocked by sign-up forms.
New domains are added regularly. Using a less-known domain reduces the chance of it being blocked by sign-up forms. Need a custom domain for business?
Whether you're a developer testing registration flows, a shopper avoiding marketing lists, or a business running QA — a throwaway email address is the cleanest solution. No real inbox needed.
Popular use cases with detailed guides:
Guides
8 verified reviews on G2
Abigail D.
Bookkeeper · Accounting
“Simple, Free Temporary Email with a 12-Hour Inbox and No Sign-Up”
No frills and completely free. Some tools only give you 10 minutes but this is 12 hours. No ads, no sign-up. You can even set browser sound notifications.
Read full review →Verified User
Medical Practice
“Time-Saving Temp Mails That Protect Privacy and Reduce Spam”
Saves a lot of time — no need to create new accounts just for trials. Protects your privacy and helps avoid spam from services that share your email.
Read full review →Aydin T.
Security & Investigations
“Temp-Mail Makes Bulk Sign-Ups Easy”
I love using Temp-Mail for bulk services sign-ups. Nothing to dislike — really all very good.
Read full review →Prem K.
Entrepreneur
“Fast, Free, and Flawless! The Best Temp Mail Out There”
The ability to create a fully custom, memorable email for free is unmatched. Clean interface, no excessive ads. Emails arrived instantly with real-time notifications.
Read full review →Douglas F.
Financial Analyst
“Trying out freecustom.email”
Free, no ads, no account required. Very simple and practical. Perfect for free trials so my main email stays clean.
Read full review →Verified User
Construction
“Straightforward, Easy to Navigate, and Smooth Overall”
The platform is straightforward and easily navigable — makes using it easy and not complicated like others. Everything is smooth on my end.
Read full review →Sanya S.
Developer
“FreeCustom.Email”
Choose any alias — meaningful and easy to recall. Loads extremely fast on both mobile and desktop. Lightweight, open source frontend with a public API available.
Read full review →Sagar K.
Risk Analyst
“Simple, clean, and works as promised”
Super easy to set up and manage custom email domains. Clean UI, no hidden steps.
Read full review →Reviews collected and verified by G2. View all on G2 →
Popular Articles
Seven captcha solvers ranked for sign-up automation on failed-solve billing, free trials, API design and coverage, plus how to pair one with an email API.
Already using temp email APIs for automation? Here's how pre-signed OTP URLs, wait= long-polling, since= anchoring, and parseCode= eliminate manual patterns from your pipeline.
Comparing disposable email APIs for bot automation in 2025 — Guerrilla Mail, Mailinator, Mailosaur, self-hosted, and FreeCustom.Email. Which one actually scales?
Most automation projects fail at the same invisible step — email verification. Here's why it breaks at scale and the stateless fix that actually works.