ZeroBounce — Accurate email validation & deliverability tools to reach the inbox. Best for Email marketers needing high deliverability and low bounce rates, Developers integrating email validation via API in multiple languages, Businesses requiring SOC 2 Type 2 and HIPAA compliance. Free to start; paid plans from $79/mo.
Email marketers needing high deliverability and low bounce ratesDevelopers integrating email validation via API in multiple languagesBusinesses requiring SOC 2 Type 2 and HIPAA complianceTeams that need 24/7 support and fast issue resolution
Not ideal for
Users needing a free tool for large volumes (only 100 free verifications)Simple one-off email validation without API needs (overkill)Budget-constrained startups with very small lists (cheaper alternatives exist)Non-English speakers (interface and support primarily in English)
ZeroBounce is a top-tier email verification tool with strong accuracy and speed. Its 99.6% accuracy guarantee and low unknown rates make it a safe bet for marketers and developers who need reliable list cleaning. The 24/7 support and easy integrations sweeten the deal.
ZeroBounce is an excellent choice for businesses of all sizes that rely on email marketing and need to maintain high deliverability. Its 99.6% accuracy guarantee and low unknown rates (average 1.69% in 2024) provide confidence in campaign results. The platform offers a comprehensive suite of tools beyond basic verification, including email scoring, DMARC monitoring, blacklist monitoring, email finder, and email warmup, making it a one-stop shop for email health. Integrations with over 60 platforms and support for 16 programming languages (including Rust, Ruby, Python, JavaScript) ensure seamless workflow integration. However, if you are on a very tight budget, the free tier offers only 100 verifications per month, which may not suffice for larger lists. Compared to alternatives like NeverBounce or Hunter, ZeroBounce stands out for its speed (up to 90% faster on popular domains) and 24/7 customer support with fast response times. One caveat: the website does not disclose detailed pricing tiers beyond a free trial, so you may need to contact sales for custom plans. Overall, ZeroBounce is a robust, reliable choice for serious email senders.
Skip ZeroBounce if Skip ZeroBounce if you only need occasional validation of a few hundred emails per month, as the free tier is too small and the minimum purchase is 2,000 credits.
Latest from ZeroBounce
We're gathering recent updates for ZeroBounce from changelogs, press, Hacker News, and social. Check back in a day or two.
Viability Score
80/100
Safe Bet
How likely is ZeroBounce to still be operational in 12 months? Based on 6 signals including wrapper dependency, GitHub traction, pricing model, and category risk.
funding runway
80
website health
90
github activity
50
category mortality
70
wrapper dependency
100
hyperscaler overlap
80
About ZeroBounce
ZeroBounce is an email verification service that helps businesses clean their email lists and improve deliverability. Trusted by over 600,000 clients, it offers 99.6% accurate real-time email validation and a suite of deliverability tools to boost inbox placement and open rates. Key features include bulk email list cleaning, real-time API verification with 1.09s average response time, and integrations with over 60 platforms including CRMs and email service providers. ZeroBounce also provides email scoring, DMARC monitoring, blacklist monitoring, email finder, and email warmup. With SOC 2 Type 2 and ISO-27001 certification, it ensures high security and compliance. The service guarantees low unknown rates (average 1.69% in 2024) and 24/7 customer support with an average live chat wait time of 20 seconds. ZeroBounce positions itself as a fast, reliable, and accurate email verification solution, differentiating with its Verify+ feature for reduced catch-all results and support for 16 programming languages.
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Key Features
Real-time email validation with 99.6% accuracy
Bulk email list cleaning
Email scoring
DMARC monitor
Blacklist monitor
Email testing tools
Email finder
Email warmup
Verify+ reduces catch-all results
API with 1.09s average response time
Supports 16 programming languages
SOC 2 Type 2 & ISO-27001 certified
Real-world workflow fit
Concrete scenarios for the personas ZeroBounce actually fits — and what changes day-one when you adopt it.
Email marketer at an e-commerce company
You need to clean a 150,000-contact list before a holiday campaign. You upload the CSV to ZeroBounce's web dashboard. In about 45 minutes, you download the validated file with status codes.
Outcome: Your bounce rate drops from 8% to under 0.5%, and inbox placement for valid emails improves because ISPs see cleaner sending patterns.
Developer building a SaaS product
You integrate ZeroBounce's REST API into your signup form. Every new email is validated in real-time with a 1.09s average response. Disposable emails and typos are rejected before reaching your database.
Outcome: You maintain a high-quality user database from day one, reducing future email costs and improving deliverability for transactional messages.
IT manager at a mid-size company
You set up DMARC Monitor and Blacklist Monitor for your sending domains. You receive alerts when your IP hits a blacklist or when DMARC reports show failures.
Outcome: You proactively fix issues before they affect reputation, maintaining a 99%+ delivery rate for your company's newsletters and transactional emails.
Use Cases
Clean a 250K-contact CRM list before a major re-engagement campaign
Run real-time API verification on signup forms to block typos and disposable addresses
Diagnose a sudden Gmail inbox-placement drop using the Inbox Placement Tester
Per-credit pricing is fair at scale but the 100/month free tier exhausts quickly for any active list. Activity data is genuinely useful but coverage skews North American — international lists return more 'unknown' statuses than the dashboard suggests. Inbox Placement Tester seed lists are smaller than dedicated tools like GlockApps, so per-ISP signal can be noisy on edge providers. Catch-all addresses still come back as 'catch-all' rather than valid/invalid, which is industry-standard but frustrates marketers expecting binary outcomes.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Annual total
Free
Over 12 months
Effective monthly
Free
Billed monthly
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published ZeroBounce tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Free
$0
Ideal for
Solo marketer or micro-business with a business domain who wants to test the service on up to 100 emails per month.
What this tier adds
Starting tier — free entry point with 100 monthly verifications, limited to business domains.
Pay-As-You-Go
From $16 per 2,000 credits
Ideal for
Small to mid-size businesses with irregular list cleaning needs, starting from $16 for 2,000 credits.
What this tier adds
Adds paid bulk and API verification with no credit expiry; no subscription commitment.
ZeroBounce ONE Subscription
$79/mo (annual)
Ideal for
Regular email marketers or small teams who send campaigns monthly and want predictable costs and priority support.
What this tier adds
Integrations
CRM platformsEmail service providersWebsite buildersAPI integrations
Hidden costs & gotchas
What the public pricing page doesn't put in bold. Captured from pricing-page footnotes, contract terms, and recurring complaints.
•Minimum order size: 2,000 email validation credits ($16+)
•Email Finder uses 20 credits per successful query
•Inbox Placement Test and Email Server Test may consume credits (check plan)
•Enterprise plans require custom quote with no public pricing
Where the pricing makes sense
The company stage and team size where ZeroBounce's pricing actually pencils out — and where peers do it cheaper.
ZeroBounce's pay-as-you-go pricing starts at $16 per 2,000 credits, which is competitive for high-volume users but expensive for low-volume. The ZeroBounce ONE subscription at $79/mo (annual) for 10,000 credits is good for regular marketers. Enterprise offers custom pricing with a dedicated account manager. Compared to NeverBounce (~$10/5,000 verifications) or BriteVerify, ZeroBounce is on the premium side, but you get a fuller deliverability suite.
Setup time & first value
How long it actually takes to get something useful out of ZeroBounce — broken out by persona, not the marketing-page minute.
For a marketer using the web dashboard: ~15 minutes to sign up, upload a CSV, and start processing. For a developer integrating the API: a few hours to implement but immediate test results. Bulk list processing takes about 45-60 minutes per 100,000 contacts.
Switching to or from ZeroBounce
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
Migrating in
→From NeverBounce: Export your lists from NeverBounce and upload to ZeroBounce's dashboard; API migration requires updating endpoint URL and API key.
→From BriteVerify: Download your cleaned lists as CSVs and re-verify with ZeroBounce; switch API calls to ZeroBounce's endpoints.
→From Kickbox: Similar process — export lists, upload to ZeroBounce; update API key and use ZeroBounce's SDK for 16 languages.
Migrating out
↗To NeverBounce: Export your validated lists from ZeroBounce; update API integrations to point to NeverBounce's endpoints.
↗To Mailgun Validation: Set up Mailgun's validation API; migrate lists via CSV export/import.
↗To ZeroBounce's own higher-tier plan: Contact sales for a custom enterprise plan with dedicated support.
Recent material changes
Pricing, brand, ownership, or deprecation changes worth knowing before you commit. Most-recent first.
•2026: ZeroBounce ONE subscription launched at $79/mo (annual) for 10,000 credits/month with rolling unused credits.
•2025: Verify+ feature introduced to reduce catch-all rates to 10.8%.
•2024: SOC 2 Type 2 and ISO-27001 certifications achieved.
