Bouncer

Cleaning the List Before It Costs You the Domain

Bouncer sits in front of whatever you send with. It answers one question well: which of these addresses will bounce, and which will quietly damage your sender reputation.

The Four Products

• Email Verification for bulk list cleaning, via app or API, with synchronous and asynchronous endpoints
• Bouncer Shield for real-time checking at the signup form, blocking invalid, malicious or fraudulent addresses by address and by IP before they enter your database
• Toxicity Check, which scores an address 0-5 for the risks a syntax check cannot see: widely circulated or breached addresses, known complainers and litigators, and likely spam traps
• Deliverability Kit for inbox placement tests, blocklist monitoring, and SPF, DKIM, DMARC and SpamAssassin checks

The company reports under 2% unknown results, which matters more than the headline accuracy figure: an "unknown" is an address you still have to decide about yourself, and Bouncer does not charge for them or for duplicates within a list.

Pricing That Suits Irregular Cleaning

Verification is pay-as-you-go and credits never expire: $8 for 1,000, $60 for 10,000, $400 for 100,000, down to roughly $2 per thousand at a million. Auto-refill is available if you would rather not think about it. The Deliverability Kit is a separate subscription from $25/month for 250 test emails and 10 monitored IPs or domains. Bouncer Shield is priced per monthly check.

This is the unusual bit for the category. Most verification services push you onto a monthly plan whose credits expire; buying a block that sits in the account until you need it suits an agency that cleans a client list twice a year far better.

Polish Company, Frankfurt Servers, US Cloud

Published by Bouncer Sp. z o.o. in Wrocław, with the footer stating it plainly: "Made with love in Wroclaw. Hosted in EU."

The hosting claim holds up in the DPA, which is more specific than most: "Bouncer stores and processes Personal Data in cloud-based infrastructure stack with European Union based AWS cloud (Frankfurt region), thus the data is not transferred outside the European Union." The privacy policy agrees, placing the servers in Frankfurt.

That AWS detail is the caveat worth understanding, and it is a caveat about jurisdiction rather than about location. Your list does stay in Germany. But Amazon Web Services is a US company, so the CLOUD Act reaches the provider physically holding the data even though the data never leaves the EU, and even though Bouncer itself is Polish and cannot be compelled. If that distinction matters to you, Statable and Pirsch are examples in other categories of vendors who avoid it; in verification specifically, you are handing over your entire subscriber list, so it is a fair question to ask.

Where It Fits

Verification is not something you buy instead of an email platform, it is something you buy alongside one. Bouncer pairs with any of the senders in email marketing, and its Deliverability Kit overlaps with the monitoring tools in email deliverability if you already run one.