eFax

eFax is the absolute, undisputed, and monolithic legacy titan of the internet fax industry. Founded in 1997, it was one of the very first companies to successfully digitize the archaic fax machine, allowing businesses to send and receive faxes entirely via email. Today, it operates as a massive global infrastructure provider, heavily relied upon by highly regulated industries that still legally mandate faxing for secure document transmission. The absolute core superpower of eFax is its "Enterprise-Grade Regulatory Compliance." While consumer tech has moved to Slack and email, the global healthcare industry (due to HIPAA in the US) and the legal industry still rely heavily on fax because it is legally considered a secure, point-to-point transmission. eFax provides highly encrypted, HIPAA-compliant, and GLBA-compliant digital faxing. A doctor can receive a massive 50-page medical record as a highly secure PDF directly in their inbox, entirely bypassing the physical fax machine. Furthermore, eFax offers staggering global reach, providing local fax numbers in thousands of cities across 50+ countries. It features highly robust APIs for massive enterprise integrations (e.g., allowing a massive hospital's Electronic Health Record system to automatically fax prescriptions to pharmacies). For massive enterprises and highly regulated sectors where digital faxing is a strict legal requirement, eFax is the entrenched standard.