Checkslip vs SingleFax

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

Checkslip compared with SingleFax
Detail	Checkslip	SingleFax
What it does	Bank slip verification API for transfer confirmation	Send one-time faxes online from $0.99, pay only if delivered
Stage	Not given	Not given
Founded	Not given	Not given
Based in	TH	US
Pricing model	Freemium	Not given
Pricing	Free: 50 credits when phone number is verified. Paid plans: Pack 500 (500 THB, 1,800 credits), Pack 700 (700 THB, 2,700 credits), Pack 1,200 (1,200 THB, 4,800 credits), Pack 1,500 (1,500 THB, 6,400 credits), Pack 3,500 (3,500 THB, 16,000 credits), Pack 5,000 (5,000 THB, 24,000 credits), Pack 10,000	One-time fax: from $0.99 for up to 10 pages, then $0.08 per extra page (max 1,000 pages), pay only if delivered. 30-day fax number: $4.99 one-time payment. Lifetime Basic fax number: $97 one-time payment. Lifetime Pro fax number: $147 one-time payment. Standard Plan (monthly): $6.58/mo or $79/year (
Key features	QR code and slip image verification Bank transaction lookup with reference number, date/time, and amount Sender and recipient bank names and abbreviated names Last 4 digits of account numbers Webhook delivery of results Idempotency key for duplicate request handling Does not store slip images Credit charging only when bank confirms transaction Automatic re-checking for pending transactions Multiple credit pack options from 500 to 50,000 THB	Send faxes from browser, email, or mobile app Pay only if delivery succeeds Support for up to 1,000 pages per fax Timestamped delivery confirmation Searchable AI transcripts for received faxes HIPAA Secure workflow with signed BAA IRS form filing with carrier proof Chrome extension for PDF faxing
What makes it different	Real-time verification directly from source bank records Does not store or log slip images for privacy Supports duplicate request detection without re-charging Free trial with 50 credits upon phone number verification	No account or subscription required for one-time faxes Pay only if fax delivers successfully Integrated IRS filing with official transmission proof Lifetime fax numbers with no monthly rental fees
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	25 no change since last check
Trust Flow (Majestic)	0	1
Citation Flow (Majestic)	0	27
Referring domains (Majestic)	0	36

5 details filled in for both companies.

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