Currencylayer vs SingleFax

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

Currencylayer compared with SingleFax
Detail	Currencylayer	SingleFax
What it does	Real-time JSON API for 168 World Currencies	Send one-time faxes online from $0.99, pay only if delivered
Stage	Not given	Not given
Founded	Not given	Not given
Based in	AT	US
Pricing model	Freemium	Not given
Pricing	Free plan with 100 daily API calls; paid plans from USD 14.99/month (Basic with 10,000 requests) to USD 99.99/month (Enterprise+ with 500,000 requests); custom enterprise pricing available.	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	Real-time currency exchange rates Historical exchange rates Currency conversion 168 world currencies and precious metals JSON API format HTTPS encryption Source currency switching Bid/Ask spread data	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	Update frequency from 60 seconds to hourly depending on plan 19 years of historical exchange rate data Free plan with no credit card required	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)	69 −1 (down) since last check	25 no change since last check
Trust Flow (Majestic)	27	1
Citation Flow (Majestic)	35	27
Referring domains (Majestic)	3121	36

5 details filled in for both companies.

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