ZelNum vs RFCCheck

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ZelNum compared with RFCCheck
Detail	ZelNum	RFCCheck
What it does	Phone number, carrier, and messaging app verification platform for contact list cleaning and fraud review	Validate Mexican RFC numbers via API
Stage	Not given	Not given
Founded	Not given	Not given
Based in	EE	Not given
Pricing model	Paid	Freemium
Pricing	Pay-as-you-go prepaid credits. WhatsApp: $0.5 per 10,000 lookups (bulk) or $0.008 per lookup (realtime). Telegram: $1.5 per 10,000 lookups (bulk) or $0.012 per lookup (realtime). HLR Lookup: $4 per 10,000 lookups. Carrier Lookup: $4 per 10,000 lookups. No subscription, minimum order 500–2,000 depend	Pay as you go: $0.015 USD per credit (prepaid, no subscription). Monthly plans: Basic $99/month for 10,000 credits, Growth $449/month for 60,000 credits, Pro $1,800/month for 300,000 credits. Enterprise: volume pricing available on request. /sat-lists endpoint is free on any plan. New users get $5 U
Key features	Bulk CSV/TXT file upload and processing VoIP and disposable number detection Real-time single lookups and batch API jobs	Full RFC validation with registration status, name, postal code, and digital certificates Taxpayer profile lookup with personal data and contact information Postal code lookup for CFDI invoicing Quick verification with single SAT roundtrip in 1-2 seconds Compliance checking against SAT contributor lists (Articles 69, 69-B, 69-B Bis) Bulk verification of up to 5000 records in one call Digital certificate lookup with serial numbers and validity dates Commerce registry lookup for company legal regime and shareholders
What makes it different	45 verification tools in one workflow covering phone, carrier, messaging apps, and social platforms Global coverage across international phone datasets and carrier networks Pay-as-you-go credits with no subscription, minimum commitment, or recurring fees Scalable from free single lookups to bulk API workflows and high-volume batch jobs	Directly connected to SAT database for real-time validation Supports both individual and business RFC numbers with automatic type detection Shared account and balance with CURP and voter ID validation services
Community votes	0	0
DR (Domain Rating by Ahrefs)	18 +1 (up) since last check	37 no change since last check
Trust Flow (Majestic)	15	0
Citation Flow (Majestic)	29	25
Referring domains (Majestic)	19	3

5 details filled in for both companies.

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