Verify email addresses in real time and catch invalid, disposable, and risky ones before they hurt your deliverability. Multi-layer checks, privacy-first (emails are hashed, never stored), SDKs for PHP/Laravel/Node, and pay-as-you-go credits that never expire.
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Maker
📌
Hey Product Hunt, I’m Hussam, founder of BounceShift.
BounceShift started after a real deliverability disaster in one of our own products.
Someone managed to access one of our systems and sent spam to a large purchased list of Outlook addresses. Most of the addresses were invalid, so thousands of emails bounced from our domain in a very short time.
AWS suspended our sending account. Outlook blocked our domain. Even our important emails, password resets, invoices, notifications, and customer replies stopped reaching users.
It took us weeks to recover.
The frustrating part was that most of this could have been prevented by validating the addresses before sending.
So we built BounceShift, first to protect our own systems, then as a product for other developers and businesses that depend on email.
What we focused on:
🔍 Multi-layer verification
We check syntax, MX records, SMTP, disposable emails, role-based addresses, catch-all domains, and provider-specific signals, including Microsoft 365 mailbox resolution, instead of relying only on SMTP guesses.
🔒 Privacy by design
Email addresses are stored as one-way hashes. We cannot read them, export them, or sell them.
🧑💻 Built for developers
A simple REST API, clear documentation, and SDKs for PHP, Laravel, and Node.js. Our SDKs fail open, so if validation is temporarily unavailable, it will not block your users from signing up.
💸 Simple pricing
Pay only for what you use. Credits never expire, and there are no monthly minimums.
You can try BounceShift for free with 100 validations and no credit card.
I’d really appreciate your support and honest feedback. 🙏
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One thing that would be really useful is a built-in bulk CSV uploader with a preview report showing which addresses are risky before you actually validate them, so you can decide whether to spend credits on the whole list.
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Maker
@enay1976741 Appreciate this! The bulk CSV upload is actually already in there, and you only pay for decisive results, so anything we can't confidently verify (or that you've already checked) is free. You're never paying just to learn something's "unknown." Love the pre-scan idea though, some of it (disposable/role/syntax) we could preview for free. Noting it 🙌
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honestly looks solid, the privacy-first hashing approach is a nice touch. one thing that would be super useful is a webhooks option so we can get notified async when an email gets flagged later as disposable or risky, since some of those catch patterns only show up after the fact
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finally found an email verification tool that doesn't bury the pricing behind a signup wall, and the never-expiring credits are a nice touch. caught a bunch of disposable addresses in my test list right away.
One thing that would be really useful is a built-in bulk CSV uploader with a preview report showing which addresses are risky before you actually validate them, so you can decide whether to spend credits on the whole list.
@enay1976741 Appreciate this! The bulk CSV upload is actually already in there, and you only pay for decisive results, so anything we can't confidently verify (or that you've already checked) is free. You're never paying just to learn something's "unknown." Love the pre-scan idea though, some of it (disposable/role/syntax) we could preview for free. Noting it 🙌
honestly looks solid, the privacy-first hashing approach is a nice touch. one thing that would be super useful is a webhooks option so we can get notified async when an email gets flagged later as disposable or risky, since some of those catch patterns only show up after the fact
finally found an email verification tool that doesn't bury the pricing behind a signup wall, and the never-expiring credits are a nice touch. caught a bunch of disposable addresses in my test list right away.
Mando AI
@malaz_whatever Thanks Malaz 🙏