Show HN: MailShrimp – validate email lists with risk level and confidence score

[udiocla]

Hi HN,

I recently launched MailShrimp, a tool to validate email addresses and prevent bounces — but with a twist: it returns both a risk category (valid, risky, invalid) and a confidence score (e.g., 0.93).

It performs:

Syntax & format checks

DNS / MX resolution

SMTP verification (with proxy fallback)

Disposable & catch-all detection

Score & classify each email

It’s designed to be:

Fast Clear (human-readable results + exportable data) Dev-ready (API coming soon)

You can paste emails or upload a CSV to test. Would love your thoughts or suggestions.

Live version: https://www.mailshrimp.app

PH launch: https://www.producthunt.com/products/mailshrimp

[perryraskin]

Neat. What are you using on the backend to verify? How is it different from other platforms such as Emailable?

[udiocla]

Thanks!

We're using a proprietary multi-layered algorithm that combines a series of criteria, checks, and heuristics to assess each email address.

It includes:

Format and domain-level validations SMTP-level interaction with fallback logic Detection of disposable domains, catch-all behavior, and risky patterns A scoring model that returns both a risk label (valid, risky, invalid) and a confidence score (0.0 to 1.0) And much more — especially for nuanced edge cases and deliverability signals

Unlike many validators that return a binary result, MailShrimp gives you both a label and a score, so you can decide what’s safe to keep based on your own thresholds.

We're also focused on speed and usability. Our logic is designed to handle edge cases often missed by more generic tools.

Still early stage — feedback is very welcome!

[perryraskin]

Sounds really useful. Still, I believe Emailable does that, including the scores. Have you tried it?

[udiocla]

Yes, we’ve tried Emailable — solid tool, but quite expensive in the long run.

MailShrimp is built to be much more lightweight, transparent, and affordable (starts at $14.90/month for 10,000 validations) — and you can try it for free.

Would love to hear your thoughts if you give it a spin.

[perryraskin]

Maybe they changed their pricing but my team paid $25 for 25,000 validations as a one time thing. We’re not in need of 10,000 a month so I wouldn’t be able to try it out soon. But yeah I guess I’m just still not sure how it’s that different from Emailable. Not that there’s any issue with competition of course!