StopReg vs Clerkfield
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
StopReg compared with Clerkfield
| Detail | S
StopReg | 
Clerkfield |
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| What it does | Real-time email intelligence API to detect disposable, fake, and risky email addresses
| Business verification and UCC lien search from official state records
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
| US
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| Pricing model | Freemium
| Free
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| Pricing | Free: 200 requests/month. Launch: $20/month (60,000 requests). Scale: $50/month (200,000 requests). Boost: $100/month (500,000 requests). Power: $200/month (1,200,000 requests). Elite: $400/month (2,800,000 requests). Enterprise: Custom requests/month.
| Free while in beta. Paid plans will be announced before launch.
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| Key features | - Disposable email detection with auto-updated database
- Role-based email detection (admin, support, info, sales addresses)
- Public email provider detection (Gmail, Yahoo, Outlook)
- Email syntax validation
- MX record verification
- Email forwarding and alias service detection
- Domain management and custom enforcement policies
- Real-time API validation with sub-300ms response times
- Two API endpoints: full email validation and domain-only privacy-first
- Web dashboard for manual checks and monitoring
| - Business verification with Pass, Review or Fail verdict
- UCC lien search by business name or lender
- Owner and officer verification against state records
- Full filing history and lapse dates
- REST API with authentication
- Coverage and source information on every result
- Web dashboard for manual searches
- MCP server integration for AI assistants
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| What makes it different | - Privacy-first domain-only validation option for regulated environments and GDPR compliance
- Continuously updated disposable domain database with automated discovery and behavioral analysis
- High-precision detection optimizing for low false positives over volume
- Sub-second response times built for production scale and enterprise reliability
| - Searches official state records directly, never stale or guessed data
- Coverage in 15 states for business checks and 10 for lien search
- Built for MCA funders and merchant cash advance verification
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 7 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 7 | 0 |
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| Citation Flow (Majestic) | 26 | 0 |
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| Referring domains (Majestic) | 29 | 0 |
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5 details filled in for both companies.
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