ZeroBounce

Overview

ZeroBounce is an email verification and deliverability platform established in 2015 by Hertza, a company headquartered in Santa Barbara, California. The platform has validated over 30 billion emails and serves more than 200,000 companies worldwide, including major brands like Amazon, Disney, Netflix, LinkedIn, and Sephora. ZeroBounce claims a 99.6 percent email validation accuracy rate and has been recognized four times on the Inc. 5000 list of fastest-growing companies in America, along with receiving the Inc. Power Partner Award for its role in helping other businesses succeed.

What differentiates ZeroBounce from other email verification tools is its comprehensive suite of deliverability features bundled under ZeroBounce One, which includes email verification, email warmup services, DMARC monitoring, blacklist tracking, campaign testing, and a B2B email finder tool. The platform can detect over 30 types of problematic email addresses including spam traps, abuse emails, disposable addresses, toxic domains, catch-all emails, and full mailboxes. For newsletter creators who depend on maintaining strong sender reputation and reaching inboxes reliably, ZeroBounce offers both preventive list cleaning and ongoing deliverability monitoring. The platform is GDPR, SOC 2 Type 2, ISO-27001-certified, and HIPAA-compliant, providing military-grade security for sensitive subscriber data.

Best For

ZeroBounce is ideal for newsletter creators, email marketers, and businesses of all sizes who need to maintain clean email lists and protect their sender reputation from bounces and spam complaints. The platform works particularly well for creators who have experienced high bounce rates, declining open rates, or deliverability issues with their email service provider. Newsletter creators who send regularly to large lists, have inherited old subscriber databases, or integrate with platforms like Mailchimp, HubSpot, or MailerLite will benefit from ZeroBounce's extensive integration options and real-time API verification. The platform suits both occasional users who need periodic list cleaning through the pay-as-you-go model and high-volume senders who require ongoing verification through monthly subscriptions.

Key Features

• High-Accuracy Email Verification: ZeroBounce provides 99.6 percent accurate email validation that identifies and removes invalid, fake, and outdated email addresses from your lists. The platform detects over 30 problematic email types including syntax errors, disposable emails, role-based addresses, spam traps, abuse emails, toxic domains, and catch-all addresses, helping newsletter creators maintain low bounce rates below 2 percent.

• Spam Trap and Abuse Detection: The platform specifically identifies spam traps, which are email addresses created by anti-spam organizations to catch spammers, and abuse emails that have a history of marking correspondence as spam. Removing these addresses before sending protects your sender reputation and prevents your domain from being blacklisted, ensuring your future newsletters reach subscriber inboxes rather than spam folders.

• Real-Time API Verification: ZeroBounce offers API integration that validates email addresses in real time as visitors submit them through signup forms, preventing bad addresses from entering your list in the first place. This proactive approach saves money by avoiding verification costs for addresses that would be immediately flagged as invalid, and maintains list quality from the start rather than requiring periodic cleaning.

• Email Activity Data Enrichment: The platform includes an activity data feature that reveals which subscribers have been actively checking their emails in the past 30 to 365 days, allowing you to segment and prioritize your most engaged audience members. This intelligence helps newsletter creators identify inactive subscribers who are unlikely to engage and focus campaigns on readers who actually open and interact with their content.

• Comprehensive Integration Support: ZeroBounce integrates with over 60 email marketing platforms and CRMs including Mailchimp, Constant Contact, HubSpot, ActiveCampaign, and MailerLite, allowing seamless list cleaning without manual CSV uploads. The platform also offers WordPress plugins, Chrome extensions, and Zapier connections to fit into various workflows and enable verification across different touchpoints where email addresses are collected.

• DMARC and Blacklist Monitoring: The platform provides continuous monitoring of your sending domains against major blacklists and offers DMARC reporting to prevent email spoofing and phishing attempts. These monitoring features alert you immediately if your domain appears on a blacklist or experiences unauthorized sending activity, allowing you to take corrective action before deliverability suffers lasting damage.

• Inbox Placement Testing: ZeroBounce allows you to test where your emails actually land across major providers including Gmail, Outlook, Yahoo, and AOL, revealing whether your newsletters reach the inbox, promotions tab, or spam folder. This placement testing helps newsletter creators understand how different email clients treat their content and make adjustments to improve inbox visibility before sending campaigns to their full list.

• Email Server and Campaign Testing: The platform includes an email server tester that checks all your technical configurations and a campaign content analyzer that identifies spam trigger words, broken links, and HTML validation errors before you send. These pre-send diagnostic tools help newsletter creators fix deliverability problems proactively rather than discovering issues after campaigns have already been sent to subscribers.

• Data Appending Service: When registration IPs are provided, ZeroBounce can append missing subscriber data including first and last name, gender, location, city, state, region, and country. This data enrichment helps newsletter creators personalize their communications and better understand their audience demographics without requiring additional information during the signup process.

• Chrome Extension and Bulk Processing: ZeroBounce offers a Chrome extension that allows you to validate any email address you find online directly from your browser, making it easy to verify individual contacts or rapidly collect and validate lists. The bulk processing feature handles large email lists quickly, with users praising the speed and comprehensiveness of scanning thousands of addresses at once.

Pricing

ZeroBounce offers a freemium plan that provides 100 free email verification credits monthly, allowing users to test the service without commitment and small-scale creators to verify limited lists at no cost. The pay-as-you-go model starts at $18 for 2,000 credits with a minimum purchase requirement, with pricing per credit ranging from $0.009 for smaller volumes down to $0.00275 for bulk purchases of 1 million credits or more, and purchased credits never expire. Monthly subscription pricing starts at $18 for 2,000 verifications and scales up to $40 for 5,000 verifications, $80 for 10,000, $175 for 25,000, $300 for 50,000, $540 for 100,000, $1,200 for 250,000, and continues up to enterprise volumes. For advanced deliverability features beyond verification, ZeroBounce offers separate subscription tiers starting at $49 per month for the Starter deliverability suite, $99 per month for the Team plan with multiple users, and $249 per month for the Pro plan with priority support. One credit equals one email verification through bulk uploads or real-time API, while the Email Finder tool uses 20 credits per successful query. Newsletter creators can choose between pay-as-you-go pricing for occasional cleaning or monthly subscriptions that provide cost savings for regular verification needs.