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Alternatives · Online Fax

Retarus Fax alternatives

As of Nov 13, 2026, the highest-graded Retarus Fax alternative is InterFAX (2.4 GPA).

Retarus Fax compared with 5 alternatives: InterFAX, EtherFax, FaxCore, OpenText Fax (RightFax) and SRFax.

Retarus Fax's current pricing could not be confirmed from its own site. None of the alternatives has a free plan. One more offers a free trial.

Listings checked up to Nov 13, 2026 · Where the facts come from

Black Friday: is there a Retarus Fax sale?

At a glance

ToolPriceFree planRuns on
Retarus FaxThis toolPaidNoWeb, Windows
InterFAXFree trial · from $9.95/moTrial onlyWeb
EtherFaxPaidNoWeb
FaxCorePaidNoWeb, Windows
OpenText Fax (RightFax)PaidNoWeb
SRFaxFrom $10.70/moNoWeb

How each one differs from Retarus Fax

  1. InterFAX

    Cloud fax by subscription or prepaid credit, with REST and SOAP APIs

    • InterFAX starts at $9.95 per month for 100 inbound and 100 outbound pages, billed monthly.
    • InterFAX lists no Windows app, which Retarus Fax has.
    • InterFAX also covers workflow automation.
    • InterFAX does not cover reports, which Retarus Fax does.

    Suits: Organizations that want a fax API alongside a plain subscription

    InterFAX vs Retarus FaxInterFAX pricing and details

  2. EtherFax

    Cloud fax network and AI document workflows for organizations

    • EtherFax lists no Windows app, which Retarus Fax has.
    • EtherFax also covers workflow automation.
    • EtherFax does not cover reports, which Retarus Fax does.

    Suits: Hospitals and clinics that exchange documents with Epic or OnBase

    EtherFax vs Retarus FaxEtherFax pricing and details

  3. FaxCore

    Fax server software run on-premise, in the cloud or hybrid

    • FaxCore also covers workflow automation.
    • FaxCore does not cover reports, which Retarus Fax does.

    Suits: IT teams replacing an aging fax server

    FaxCore vs Retarus FaxFaxCore pricing and details

  4. OpenText Fax (RightFax)

    Enterprise fax server software that connects to EHR and ERP systems

    • OpenText Fax (RightFax) lists no Windows app, which Retarus Fax has.
    • OpenText Fax (RightFax) also covers workflow automation.

    Suits: Hospitals and large enterprises replacing legacy fax servers

    OpenText Fax (RightFax) vs Retarus FaxOpenText Fax (RightFax) pricing and details

  5. SRFax

    Email-to-fax service with HIPAA plans and a REST API

    • SRFax starts at $10.70 per month for 200 pages, billed annually ($12.60 billed monthly).
    • SRFax lists no Windows app, which Retarus Fax has.
    • SRFax does not cover reports, which Retarus Fax does.

    Suits: Healthcare offices in the US and Canada that need HIPAA or PHIPA compliant faxing

    SRFax vs Retarus FaxSRFax pricing and details

Limits worth knowing in 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.
Retarus Fax pricing and details

Common questions

What are the alternatives to Retarus Fax?

The alternatives to Retarus Fax in this directory are InterFAX, EtherFax, FaxCore, OpenText Fax (RightFax) and SRFax. Each one has a side-by-side comparison with Retarus Fax.

Is there a free alternative to Retarus Fax?

None of the alternatives listed here has a free plan. InterFAX offers a free trial.

When were these prices checked?

Each listing shows its own date. On this page they run from Nov 12, 2026 to Nov 13, 2026. Vendors change prices without notice, so confirm on their site before you buy.