ZeroBounce
Email validation and list hygiene service that scores address quality before you send.
- Reading time:
- 5 min
- Difficulty:
- Beginner
- Estimated duration:
- 5 min
- Prerequisites:
- None
- Last updated:
- 2026-07-15
- Author:
- empire
Overview
Email validation and list hygiene service that scores address quality before you send.
Vendor: ZeroBounce
Primary purpose
Validate and clean email lists to reduce hard bounces and risk.
Best for
- Cleaning purchased or aging lists before campaigns
Common use cases
- Bulk validate before a reactivation campaign
- Remove invalid syntax and known risky addresses
Advantages
- API + UI workflows
- Common operator choice for hygiene
Limitations
- Validation is probabilistic for catch-all domains
- Does not fix consent problems
When not to use it
- Your list is tiny and already confirmed opt-in only
Pricing
Credits / paid plans based on volume.
Official website
Inputs and outputs
Typical inputs
- Email list or API requests
Typical outputs
- Validity statuses
- Risk/quality flags
Privacy notes
- Uploading lists shares recipient identifiers with a third party — follow your privacy policy.
Related Solve Articles
- High bounce ratePermanent or repeated delivery failures indicate poor list quality and hurt reputation.
- High unsubscribe rateUnsubscribe or list-unsubscribe activity spikes, signaling relevance, frequency, or consent problems.
- Low open rateOpen rates fall sharply — often a placement, identity, or measurement problem rather than subject lines alone.