Retarus vs. RingCentral

Retarus and RingCentral differ mainly in accessibility, as the former only supports Web and Windows applications. RingCentral works from anywhere, making sending and receiving faxes from PC, Mac, Android, and iOS easier.

Retarus vs RingCentral


 Price Per PageHIPAA ComplianceeSign on FaxFax AppsFax API
RetarusCustom pricingYesYesWeb, DesktopYes
RingCentralYesNoWeb, Desktop, MobileYes

Retarus vs RingCentral Feature Comparison

Retarus vs. RingCentral

Secure fax encryption and sharing

Retarus implements robust security protocols, such as Transport Layer Security (TLS) encryption, HTTPS transfers, and Virtual Private Network (VPN). Their Retarus Enterprise Cloud uses secure encrypted storage, ensuring the protection of stored faxes on their platform.

On the other hand, RingCentral implements end-to-end encryption (E2EE) and 256-bit Advanced Encryption Standard (AES) to ensure the utmost protection of all transmitted and stored data. They also use SSAE-16-certified data centers, which adhere to strict security protocols and regulatory guidelines.

HIPAA compliance

Retarus and RingCentral both offer HIPAA-compliant fax solutions catering to diverse business needs, making them suitable for healthcare use. So, regardless of which fax service you choose, you can achieve peace of mind knowing that you can ensure security and confidentiality while faxing sensitive health and medical documents.

Retarus vs. RingCentral
Retarus vs. RingCentral

Device applications

Retarus offers WebExpress as their web app, where users can manage their faxes. Its fax solution for Windows also allows users to send faxes directly from their desktop or any Microsoft application. The downside is that this service lacks support for mobile applications, specifically for Android and iOS.

For better mobile accessibility, RingCentral prides itself on being able to send and receive faxes from any mobile phone or computer. This fax service seamlessly works on various platforms, including Mac, Windows, iOS, and Android.

eSign on fax

Retarus allows users to incorporate electronic signatures into their document management processes in different formats. As an alternative to RingCentral, this feature ensures that all received faxes from clients and vendors remain tamper-proof, enhancing their authenticity and reliability.

In contrast, RingCentral does not have a built-in eSignature tool that users can utilize to make their document management process more seamless. If users want to add electronic signatures, their next best option would be to use third-party tools like Fill or DocuSign.

Retarus vs. RingCentral
Retarus vs. RingCentral

Fax API and developer support

Retarus offers a fax API that developers can use to integrate faxing capabilities into different business and document management applications. Developers can also choose whether to deploy the API as REST or SOAP.

On the other hand, RingCentral’s API caters to a broader list of functionalities. It’s not solely focused on integrating faxing capabilities but rather on integrating other communication features, such as voice and video calling. The API provided by this service can also be configured to enable team messaging and webinar functionalities in existing software systems and apps.

Retarus vs. RingCentral

Retarus and RingCentral Pricing

Retarus offers custom pricing, as they do not offer fixed pricing to its users. If you want to avail yourself of their cloud faxing service, it is best to contact their sales team to discuss your specific faxing needs and preferences.

Meanwhile, RingCentral offers two pricing plans:

  • Fax 3000: $22.99 per month with 3000 pages
  • Advanced: $25 per month with unlimited internet fax and instant access to its advanced business phone system

iFax is the preferred Retarus and RingCentral alternative by millions of customers worldwide

eSign and annotate faxes

Avoid wasting time signing documents manually. iFax has built-in tools for adding electronic signatures and document annotations.

Send a fax from phone

Fax documents online quickly and effortlessly simply by tapping the options available on your phone's mobile faxing app.


Worry less about meeting your business's growing demands. Our fax service offers the flexibility you need to scale up or down as needed.

Glad I found iFax

“Faxing is not necessarily a thing of the past. And when you need it, it needs to be quick and easy without the headache of maintaining a fax machine. iFax is the perfect fit.“

Jerry R., Telecommunications

“Easy to use”
“It was great and easy to use. I will use it again. I didn’t have to go anywhere to fax or provide my credit card number.”
Jacinda T., Medical Records (Hospital & Health Care)

“For Medicals”

““iFax has helped us make that transition into a paperless reality. Ifax support is always kind and fast to respond to my emails.”

Syed H., Consultant Physician (Medical Practice)


The smarter choice for enhanced productivity and seamless fax communications

Switch to iFax to streamline faxing workflows and achieve increased productivity without the hassles and costs of machine maintenance. 

“It was cheaper compared to other providers, the ease of use and very intuitive design and the reliability of the faxes being sent. My team and I always get great support from the team whenever an issue needs to be dealt with.”

John M., CIO (Medical Practice)

Yes, Retarus offers a robust API that you can use to integrate faxing capabilities into existing applications. It lets you send and receive faxes directly from your ERP, CRM, and EHR systems through an API. You can also choose between SOAP and REST APIs, making integrations with various platforms, including on-premise systems and cloud-based applications, easier. This flexibility allows for seamless communication across different systems, overcoming typical data silos, which often result in inefficiencies and errors.

Yes. RingCentral supports faxing to fax numbers in the United States and overseas. You can also fax to multiple contacts or a specific group of people. It’s also worth noting that the fax service charges a $30 one-time fee for setting up a 1-800 or toll-free fax number.