FaxCore vs Retarus Fax (2026): which should you pick?

Pick FaxCore if

• Fits if you run a company fax server and want it on your own hardware
• Works for organizations that must link fax to copiers and Active Directory

Look elsewhere if

• Skip it if you are one person, as there is no self-serve plan
• Skip it if you want a price, since every deployment is a request for a quote
• Watch out: cloud and hybrid are described as usage-priced with no figures
• Not for you if you want a free trial, as only a demo is offered

Pick Retarus Fax if

• Fits if you are a mid-size or large company moving fax into Outlook
• Works for teams that need fax tied to SAP or Epic

Look elsewhere if

• Skip it if you are an individual or small office, as it is aimed at larger companies
• Skip it if you want a price on the page, since none is published
• Not for you if you want a free trial, as none is listed
• Watch out: the starting page covers only the Microsoft 365 and Outlook option of a wider product line

FaxCore

• No prices are published; every deployment is quoted through a request for a quote.
• The cloud and hybrid options are described as priced on usage, with no figures shown.
• Built for organizations, with no self-serve plan for individuals.

Retarus Fax

• No prices are published; the site is built around scoping with a project team.
• Positioned for mid-size to large enterprises, not individuals or small offices.
• The page used as the starting URL describes the Microsoft 365 and Outlook option of a wider product line.

FaxCore

Three ways to deploy

The product page lists an on-premise server, a cloud-based SaaS service, and a hybrid in which etherFAX acts as the cloud fax modem.

Appliance and virtual servers

Turnkey appliances ship with the software and fax boards or FoIP drivers installed, and a virtual appliance runs in a virtual environment.

Standard and Enterprise editions

The Standard virtual server tops out at 8 fax lines, and the Enterprise server on SQL Server at 1,500 lines, with extra line licenses sold separately.

Office 365 and Active Directory

The cloud service uses TLS between FaxCore and Office 365 and integrates with Microsoft Active Directory.

MFP connectors

Connectors are listed for Sharp, Konica Minolta, Xerox, Ricoh and Toshiba multifunction printers.

Migration modules

Integration modules that emulate RightFax, FaxMaker and FACSys integrations are listed as add-ons.

Retarus Fax

Outlook and Microsoft 365

An Outlook add-in and Active Directory synchronization let Microsoft 365 users send and receive fax and SMS without in-house infrastructure.

Several ways in

Fax can be used through a web browser, Outlook, multifunction printers or a Windows application.

APIs and connectors

REST and SMTP interfaces are offered, plus pre-built connectors for applications such as Epic and SAP.

Web portal and tracking

IT teams configure services in a web portal, with real-time reporting on the status of individual faxes.

Global infrastructure

The page cites six data centers worldwide, multiple carriers and certifications including SOC 1, SOC 2, ISO 27001 and HITRUST.

Migration help

A named project team handles scoping, migration from fax servers, and custom integrations.

FaxCore

Pricing could not be confirmed. See faxcore.com.

Retarus Fax

Pricing could not be confirmed. See retarus.com.