Kaiju Email Verifier

Free, privacy-first email verifier for clean lists.

3 followers

Free, privacy-first email verifier for clean lists.

3 followers

Kaiju Email Verifier is a privacy-first email verification tool to clean your lists, cut bounces and protect deliverability. Upload a CSV/XLSX or check single emails, get instant valid/invalid flags and export-ready results. Free during beta, with a simple API for developers and agencies that want real-time, accurate checks.

Interactive

Free

Launch tags:Productivity•Email Marketing•Marketing

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Setapp — Grow, and monetize your app with unified AI gateway

Grow, and monetize your app with unified AI gateway

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Maker

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Hi Product Hunt, I’m Pablo, maker of Kaiju Email Verifier. For the last years I’ve been working with very large B2B datasets at Centraldecomunicacion.es and CompaniesData.cloud, and I kept running into the same problem: great campaigns were underperforming simply because the email lists were not clean enough. Too many hard bounces, spam traps and low-quality domains quietly killing deliverability. Kaiju Email Verifier was born from that pain. It is a privacy-first email verification tool with a strong focus on: Bulk verification of large CSV/XLSX lists Clear classification of valid, invalid, risky and unknown emails A clean export you can plug directly into your ESP or CRM An API for developers who want real-time checks in their products During this public beta, the web-based bulk verifier is free to use, so you can upload real lists, see how many emails are actually hurting your deliverability, and compare results before and after cleaning. I would really appreciate your feedback on: How you are currently cleaning your lists (if at all) What kind of volumes you usually work with Which integrations or features you would like to see next (ESP integrations, webhooks, automation, etc.) I’ll be here all day answering questions about email verification, cold email, list cleaning and deliverability. Thank you for checking out Kaiju and for any comments, ideas or criticism you are willing to share.

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2mo ago

@branvan300 Hey Pablo, just stumbled upon Kaiju Verifier while doing some prep work on my launch of Rewo (https://rewo.app - AI-driven automation on app store review responses) and I have to say: Thank you so much! I am still using the free version, which is really (too?) generous and works perfectly. Compared to larger competition I was able to find, your pricing is honest and modest.

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1mo ago

Setapp — Grow, and monetize your app with unified AI gateway

Grow, and monetize your app with unified AI gateway

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Maker

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2mo ago

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1mo ago