Filter Bounce verifies emails in bulk or via API, with spam trap and disposable detection. 300 free checks monthly, paid plans from $12/month.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Filter Bounce is a web-based email verification service that checks whether addresses on a list are valid before a campaign goes out. It targets hard bounces, disposable addresses and spam traps, which the company says damage sender reputation and waste marketing budget. Pricing starts at $0.0005 per email, according to its website.
The service covers two kinds of work: bulk verification of uploaded lists and real-time verification through an API. Its main claim is accuracy on difficult providers such as Gmail, Yahoo, AOL and Outlook, where some tools return an unknown result. The company states 99.9% accuracy. That figure comes from its own site and has not been independently verified.
For list cleaning, a user uploads a CSV file or pastes addresses into the dashboard. A single batch can hold up to 500,000 emails. Filter Bounce returns the file with the original columns intact, plus added columns showing each verification result, so segmentation and custom fields stay in place.
For live checks, the REST API can be added to a registration or signup form to verify addresses as they are collected. The company says the API responds quickly enough to avoid delaying form submission. It describes its methods as going beyond simple SMTP checks, including mail server simulation and provider-specific verification algorithms.
Detection covers disposable and temporary addresses, using a database the company says is constantly updated, as well as catch-all and role-based addresses. A customizable risk tolerance lets users decide how those riskier addresses are treated in a given campaign. Typo detection suggests fixes for common mistakes, and spam trap detection flags addresses that could lead to blacklisting.
Other capabilities include CSV data preservation, copy-paste input, and results for Yahoo, AOL, Google and Outlook addresses. Filter Bounce says it aims to give a definitive answer instead of unknown. Even so, one customer testimonial notes that about 2.4% of results came back unknown, which support described as unverifiable rather than invalid.
Filter Bounce is an email verification service that checks whether addresses are valid before a campaign is sent. It detects hard bounces, disposable emails, spam traps and typos, and works through bulk upload or a REST API.
The site advertises verification from $0.0005 per email. Growth is $15 per month for 15,000 verifications, or $12 per month billed yearly. Dominate is $125 per month for 150,000 verifications, or $99 per month billed yearly, and Enterprise is custom.
Yes. Every user gets 300 free verification credits each month, with no credit card required. The company says the trial includes full access to all features.
A single batch can hold up to 500,000 emails. For larger volumes, the company says it can process unlimited batches in chunks of 500,000 with custom schedules.
Yes. Filter Bounce returns the CSV with all original data intact, along with added columns showing the verification results.
The company says its API responds quickly enough to have no impact on form submission times. Real-time verification can be added to a registration process through its REST API.
One-time purchased credits never expire. Daily credits expire every 24 hours, and monthly credits expire every 30 days, according to the site.
It suits email marketers, agencies, sales teams and product teams that send email at volume or collect signups. Its low per-email pricing and free monthly allowance make it accessible to small and midsize businesses.