MailboxValidator
Email verification software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
Take the quiz to check if MailboxValidator and its alternatives fit your requirements.
$19.95 per 30-day validity
Free TrialFree version
Small
Medium
Large
- Information technology and software
- Agriculture, fishing, and forestry
- Education and training
What is MailboxValidator
MailboxValidator is an email verification service that checks whether an email address is syntactically valid and whether the mailbox and domain are likely to accept mail. It is used by teams that manage email lists for marketing, sales outreach, and account sign-up flows to reduce bounces and improve list hygiene. The product is offered via API and batch/list validation, and it also provides related checks such as disposable email detection and domain/MX validation.
API-first verification workflow
MailboxValidator provides an API that supports real-time validation in web forms and backend processes. This fits common use cases such as lead capture, user registration, and CRM enrichment. API-based verification also enables automation compared with tools that focus primarily on manual list uploads.
Batch list validation support
The product supports validating email lists in bulk, which is useful for cleaning existing databases and imported lead lists. Batch processing helps operations teams standardize list hygiene before campaigns or outreach sequences. This aligns with typical requirements in the email verification category where both real-time and bulk modes are needed.
Multiple risk and quality checks
MailboxValidator commonly includes checks beyond basic syntax, such as domain/MX validation and detection of disposable email addresses. These checks help teams segment risky addresses and apply different handling rules (block, flag, or allow). This can reduce downstream deliverability issues compared with relying on syntax-only validation.
Limited broader sales features
MailboxValidator focuses on verification rather than end-to-end prospecting, sequencing, or contact database capabilities. Teams looking for a single platform that combines lead sourcing, enrichment, and outreach typically need additional tools. This can increase integration and workflow complexity for sales development use cases.
Accuracy varies by mailbox type
As with most email verification services, results can be less definitive for certain providers that restrict SMTP verification or use catch-all configurations. In these cases, the product may return “unknown” or risk-based outcomes rather than a clear deliverable/undeliverable status. Users often need internal policies for how to treat ambiguous results.
Integration details may require effort
While an API enables flexibility, implementing validation across forms, CRMs, and data pipelines can require developer time and ongoing maintenance. Organizations without engineering support may rely more on manual uploads and exports. This can slow adoption compared with products that provide deeper native integrations into common go-to-market stacks.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| BULK-TRIAL | $0.00 (30-Day Validity) | 100 Queries, Standard Support, < 1 hour processing, Free trial (one-time 30-day validity). |
| BULK-1 | $19.95 (30-Day Validity) | 1,000 Queries, Email Support, < 4 hours processing, $0.02 / Query. |
| BULK-5 | $39.95 (30-Day Validity) | 5,000 Queries, Email Support, < 4 hours processing, $0.008 / Query. |
| BULK-10 | $59.95 (30-Day Validity) | 10,000 Queries, Email Support, < 4 hours processing, $0.006 / Query. |
| BULK-50 | $149.95 (30-Day Validity) | 50,000 Queries, Email Support, < 12 hours processing, $0.003 / Query. |
| BULK-100 | $199.95 (30-Day Validity) | 100,000 Queries, Email Support, < 24 hours processing, $0.002 / Query. |
| BULK-500 | $399.95 (30-Day Validity) | 500,000 Queries, Email Support, < 48 hours processing, $0.0008 / Query. |
| BULK-1000 | $699.95 (30-Day Validity) | 1,000,000 Queries, Email Support, < 72 hours processing, $0.0007 / Query. |
| API-FREE | $0.00 Per Month (30-Day Validity) | 300 Queries per 30 days, Auto Renewal, Auto Recharge, Standard Support (free ongoing tier). |
| API-FREE+ (invite-only) | $0.00 Per Month (30-Day Validity) | 600 Queries per 30 days, Auto Renewal, Auto Recharge, Standard Support, requires invite code. |
| API-3 | $29.95 Per Month (30-Day Validity) | 3,000 Queries, Auto Renewal, Auto Recharge, Email Support, $0.01 / Query. |
| API-15 | $69.95 Per Month (30-Day Validity) | 15,000 Queries, Auto Renewal, Auto Recharge, Email Support, $0.0047 / Query (listed as most popular). |
| API-75 | $139.95 Per Month (30-Day Validity) | 75,000 Queries, Auto Renewal, Auto Recharge, Email Support, $0.0019 / Query. |
| API-375 | $339.95 Per Month (30-Day Validity) | 375,000 Queries, Auto Renewal, Auto Recharge, Email Support, $0.0009 / Query. |
