Sinch Fax API vs WestFax

Sinch Fax API is a cloud service for sending and receiving faxes through a REST API. It supports delivery tracking and webhooks for incoming or completed faxes, with Basic or OAuth 2 authentication. If storage is enabled, fax logs and media remain available for 13 months before deletion. Listed formats include DOC, DOCX, PDF, TIF, JPG, TXT, PNG, URLs, and HTML. A customer portal shows fax status and send or receive times, and provides controls for users, groups, roles, and permissions. Sinch describes intelligent routing and automatic retries for failed transmissions, and says its U.S. fax-processing network has 99.999% uptime and redundant infrastructure. Customers can select local or toll-free numbers or bring their own; the infrastructure is described as scalable for high volumes. The service supports stated HIPAA, SOC 2, and GDPR compliance needs and secure transmission for healthcare data. A free Sinch Build Dashboard account is required to start, and signup includes a free virtual number for testing. Pay-as-you-go costs $0.05.

WestFax is a paid online fax service for inbound faxing through a virtual fax number. It supports international faxing and HIPAA compliance, with access on the web, Windows, macOS, iOS, and Android; mobile apps are available. The Solo plan costs $14.99 a month, billed monthly with cancellation at any time, and includes one user license and 500 pages per month. The five-user Team plan costs $39.95 a month and includes 1,500 pages per month. WestFax has no free plan. The maker is listed as founded in 1999, with headquarters given as Centennial, Colorado, United States; its maker information also lists Denver, Colorado.