ZelNum vs Duo Leads

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 Duo Leads
Detail	ZelNum	Duo Leads
What it does	Phone number, carrier, and messaging app verification platform for contact list cleaning and fraud review	SEO and keyword data API with 44 routes, paid per call over x402 in USDC on Base
Stage	Not given	Not given
Founded	Not given	Not given
Based in	EE	NL
Pricing model	Paid	Paid
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	Prices per call range from $0.012 to $0.25 in USDC on Base. Keyword overview: $0.04. Search volume: $0.04. Keyword ideas: $0.04. Related keywords: $0.04. Keyword variations: $0.04. Keyword difficulty: $0.04. Search intent: $0.04. Keyword volume history: $0.048. Keyword suggestions: $0.04. Google Ads
Key features	Bulk CSV/TXT file upload and processing VoIP and disposable number detection Real-time single lookups and batch API jobs	Keyword research with search volume, CPC, difficulty, intent and ideas for up to 100 keywords per call Domain overview, traffic estimates and ranked keywords for up to 100 domains Backlink profile data including referring domains and anchor texts with 24-month history On-page SEO audit and Lighthouse page speed analysis for individual URLs Amazon keyword ideas and search results across multiple regional stores Brand mention tracking and AI answer visibility monitoring Website technology stack and WHOIS domain registration data No account, API key or subscription required; pay per call in USDC on Base blockchain
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	Pay-per-call pricing in USDC stablecoin on Base blockchain with no account setup required 44 routes across 9 data families covering comprehensive SEO and keyword research data
Community votes	0	0
DR (Domain Rating by Ahrefs)	18 +1 (up) since last check	6 no change since last check
Trust Flow (Majestic)	15	0
Citation Flow (Majestic)	29	24
Referring domains (Majestic)	19	19

6 details filled in for both companies.

More alternatives to ZelNum More alternatives to Duo Leads