# #1 ZeroBounce

ZeroBounce is an email validation service that removes invalid and risky addresses from lists, with add-ons including AI scoring, an email finder, warmup, inbox placement tests, and blacklist and DMARC monitoring. Website: zerobounce.net. Category: [Email Infrastructure & Verification](https://gtmranked.com/best/email-deliverability/). Score 27/100 (4 positive, 3 mixed, 3 negative of 10 independent comments).

**Verdict:** Independent users who report on ZeroBounce mostly describe it as an accurate, established verifier for list cleaning, but price is the recurring complaint and its accuracy is disputed on B2B lists, where one user says conservative risk scoring bins valid addresses. About two-thirds of the 49 Reddit mentions are promotional, including a one-day burst of near-identical posts pitching FilterBounce, DoYouMail and Mystrika as ZeroBounce replacements, repeated plugs for one cheaper verifier, and seeded Prospeo switching stories, so this rests on about ten independent opinions, most of them brief.

**What users like:**
- Several users who cleaned lists with it rate its accuracy as solid [1](https://www.reddit.com/r/DigitalMarketing/comments/1k16pnz/_/mnm1vfj/) [2](https://www.reddit.com/r/DigitalMarketing/comments/1k16pnz/_/mnl5prt/) [3](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/kxpwesq/)
- A six-month user singles out the real-time API as a strong point [1](https://www.reddit.com/r/DigitalMarketing/comments/1k16pnz/_/mnm1vfj/)
- Users who moved off NeverBounce for Apollo-sourced lists found it somewhat better or 'decent', though not a complete fix for bounces [1](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/mf9rj1s/) [2](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/mldhksc/)

**What users complain about:**
- Expensive: users call it pricey, and an early-stage team says the API pricing became too heavy [1](https://www.reddit.com/r/Emailmarketing/comments/1rkfayc/_/p3mepk8/) [2](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/mldhksc/)
- Accuracy is contested on B2B data: one team left over low accuracy, and another says its conservative risk scoring pushes good startup addresses into the risky bucket [1](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/lcsvu26/) [2](https://www.reddit.com/r/EntrepreneurRideAlong/comments/1ss4diq/_/ohqcqgc/)
- Cleaned lists still produced bounces for users verifying Apollo leads [1](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/mf9rj1s/) [2](https://www.reddit.com/r/Emailmarketing/comments/1bsft16/_/mldhksc/)
- A customer verifying a large HubSpot database says support treated them like a nuisance and is looking to replace it [1](https://www.reddit.com/r/hubspot/comments/1v4ry33/_/ozdfd2q/)

**Best for:** Marketers who want an established verifier and can absorb a higher per-email price; Routine cleaning of opt-in or older marketing lists.
**Skip it if:** Early-stage teams on a tight verification budget; B2B lists heavy in startup or catch-all domains.
**Pricing (vendor-stated, checked 2026-10-14):** Free plan with 100 validation credits a month (business-domain signup). Pay-as-you-go from $39 for 2,000 credits. ZeroBounce ONE subscription from $99/mo for 10,000 credits, 20% off billed annually; over 1M credits is sales-led.

Full review: https://gtmranked.com/tools/zerobounce/