NumberChecker vs LeadSleuth

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

NumberChecker compared with LeadSleuth
Detail	NumberChecker	LeadSleuth
What it does	Bulk WhatsApp, phone and email verification without login or QR scan	AI lead detective that scans public communities daily for buying intent and delivers scored dossiers with sourced outreach drafts
Stage	Established	MVP
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Paid	Not given
Pricing	WhatsApp Number Checker: $1 per 40,000 checks. WhatsApp Business Checker: $1.67 per 10,000 checks. WhatsApp Last Seen Checker: $3.39 per 10,000 checks. WhatsApp Age & Gender Checker: $11.76 per 10,000 checks. Number Status Detection: $4.26 per 10,000 checks. RCS Status Detection: $3.92 per 10,000 ch	Free during beta with 10 dossiers per day. After beta: Starter $49/month (10 dossiers daily, 1 ICP profile), Growth $99/month (15 dossiers daily, 3 ICP profiles), Scale $199/month (50 dossiers daily, 10 ICP profiles, priority scans).
Key features	WhatsApp status verification without login or QR scan Phone number status detection for active, disconnected and ported numbers WhatsApp age and gender demographic estimation RCS and Google Messages capability detection iOS and iMessage status detection Telegram activity and status checking Gmail, Yahoo and Outlook email validation REST API for automation and integration Pay-as-you-go credits with no subscription Multiple checks stacked on single CSV upload	Daily scans across Hacker News, Bluesky, GitHub, Dev.to, Lobsters, job postings and competitor pricing pages Intent scoring (0-100) with leads scoring 60+ receiving full dossiers AI-drafted outreach quotes their own words Every claim links to public source with no scraped emails or private databases Warm-path hints including shared communities and past employers AI copilot (Sherla) for answering questions about leads and ICPs Custom research questions per ICP (up to 5) Watchlist for monitoring target accounts
What makes it different	No WhatsApp login required, protecting user accounts from bans Lowest pricing: WhatsApp checks from $1 per 40,000 Thirteen different checks with mixed stacking on one upload Contact lists never sold and kept confidential Human account review before access to prevent abuse	Every claim in dossiers is sourced and verified against public posts with 'unknown' stated rather than guesses Users send all messages themselves; platform never DMs or emails on your behalf Intent-based lead discovery instead of static contact lists or raw keyword mentions Public data only with no scraped emails or private databases Reduces daily prospecting time to ~10 minutes reviewing scored dossiers
Community votes	0	0
DR (Domain Rating by Ahrefs)	7 −1 (down) since last check	11 +1 (up) since last check
Trust Flow (Majestic)	3	7
Citation Flow (Majestic)	21	11
Referring domains (Majestic)	8	23

5 details filled in for both companies.

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