Number 1:
Siel
SMS API and CPaaS platform for OTPs and alerts
- Email & notification APIs
- DR 0 no change since last check
Email & notification APIs
Fast, accurate bulk email verifier and validator service that cleans lists and prevents bounces
Ahrefs Domain Rating benchmarked 14 Nov 2026, rebuilt 6 Nov 2026.
Email verification and validation service that verifies email addresses with 99.7% accuracy to clean lists and improve deliverability.

Bulk Email Checker is an industry-leading email verification and validation service that helps businesses clean their email lists and improve sender reputation. The platform uses SMTP-based verification to confirm mailbox existence in real-time with 99.7% accuracy.
The service offers multiple verification tools including bulk email verification for CSV and text file uploads, a real-time API for integration into signup forms and checkout pages, and quick single email validation through a web interface. Every email passes through comprehensive validation including RFC syntax checks, DNS and MX record verification, duplicate removal, disposable email detection, and deep SMTP verification.
Bulk Email Checker provides enterprise-grade security with AES-256 encryption, SOC 2 Type II compliance, and support for GDPR, CCPA, and HIPAA requirements. The platform integrates with major email service providers, CRM systems, WordPress, Google Sheets, and Microsoft Excel. It operates on a pay-as-you-go credit model with no monthly subscriptions or long-term contracts required.
Pricing model: Paid
Pay-as-you-go credits starting at $2.95 for 1,000 email validations, $9.95 for 10,000 emails, $74.95 for 100,000 emails, up to $4,975.95 for 25,000,000 emails. Free tier offers 10 free checks daily. Credits never expire and no monthly fees.
Following Bulk Email Checker means an email when they reach a milestone, post an update or launch a new product.
| Metric | Value |
|---|---|
| Domain Rating | 50 +1 (up) since last check |
| Trust Flow | 8 no change since last check |
| Citation Flow | 35 no change since last check |
| Referring domains | 158 no change since last check |
| External backlinks | 672 no change since last check |
Ahrefs Domain Rating benchmarked 14 Nov 2026, rebuilt 6 Nov 2026. Main build topic: Sports/Soccer (7). Majestic benchmarked 25 Oct 2026, rebuilt 25 Oct 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
| Domain age | 13 years |
|---|---|
| Registered | |
| Expires | |
| Registrar | Porkbun LLC |
| DNSSEC | Not signed |
Since Bulk Email Checker launched on Maker Launches on 25 October 2026, these are the figures we have tracked.
Day 19 since launch. Next receipt: day 30, 24 Nov 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
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Bulk Email Checker has a free listing. The owner can unlock the full profile with a paid launch for $5:
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