Retarus vs iFax

The main difference between iFax and Retarus Fax API is that iFax has a scalable and flexible API interface for cloud-based systems, while Retarus requires more in-depth knowledge about integrating fax into existing platforms.

retarus vs ifax

Why businesses choose
iFax Fax API over Retarus

Free API Test Key

Get a free API staging test key for your staging environments.

24/7 Support

Experience 27/4 support through phone calls and live chat.

Easy Integration

Seamlessly integrate with EMR and EHR software, including NextGen and Cerna.

iFax VS Retarus FAX API

 Price per pageHIPAA ComplianceSecure Fax Transmissions

Programmable API

High-Volume Faxing
RetarusCustom plansYesYesYesYes

Consider the following factors when comparing the API functionality of Retarus vs iFax

Retarus vs iFax

Pricing and Plans

For only $25 per month, the iFax Pro plan already provides you access to its programmable Fax API. You also get a free staging API key, which you can use to test how the integration works and whether it fits your business requirements. Plus, you gain access to advanced fax features such as smart folders, eSignatures, and sending faxes by email.

Meanwhile, the pricing for Retarus depends on your API needs. It follows a “pay-per-use” business model, so no plans are available with fixed monthly or yearly subscription rates.

“Our organization has been using this iFax service for a few months now, and it has been working very well. The customer service team are excellent, they have been very helpful in explaining our usage and how we can benefit from upgrading to a better package that will cost us less instead of trying to sell us more than we need.”
Shamin R.
Digital Marketing Mentor


With iFax, you can count on its Fax API to be available 99.99% of the time. It ensures the deliverability of high-volume fax transmissions without frequent downtimes. It also lets you do performance testing to avoid potential bottlenecks once you incorporate specific fax functionalities into existing applications.

The same applies to Retarus. The cloud-based Fax API provider has extensive documentation and can continuously monitor the performance of API endpoints to ensure optimal operations.

“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)
Retarus vs iFax


One of the top features of iFax is its adherence to the highest federal and international standards, such as HIPAA and GLBA. It provides the necessary measures for covered entities to protect their sensitive documents containing protected health information (PHI) when using API to send and receive faxes. Our fax service will also sign a Business Associate Agreement (BAA) for HIPAA compliance at no added cost.

Similarly, Retarus is a HIPAA-compliant cloud fax solution that offers secure API services. It has advanced access controls and authentication codes to protect developer systems against unauthorized access.

“Overall, iFax is easy to use, and I like it. I work in the health industry. It is important for me to have software with HIPAA compliance. It is worth to pay money to be compliant.”
Natsumi M. Business Owner

How scalable are they?

iFax Fax API provides scalability and integration with existing systems and applications. When writing API requests, you can use your preferred programming language and chosen framework to incorporate fax functionality into various workflows. Additionally, you can scale the volume of faxes sent and received without worrying about infrastructure limitations.

With the Retarus Fax API, you can easily manage high volumes of faxes while maintaining a smooth and efficient workflow. It offers high availability and high capacity, providing you with the exact bandwidth you need at any particular moment.

“Great customer service! The Google Workspace integration has been great for our organization. Everyone likes it compared to our previous service.”
Omar C., IT Expert (Non-Profit)
Retarus vs iFax
Retarus vs iFax

Audit Trails

iFax automatically tracks fax history and verifies the delivery of each document transmitted through API. It makes tracking and monitoring faxes sent from ERP and EHR systems seamless and efficient, helping ensure compliance with various regulatory requirements.

Meanwhile, Retarus provides audit trails to track every failed or successful fax transmission. However, there’s no mention of whether it automatically logs faxes that go through API or other integrations.

“It is cheaper compared to other providers, the ease of use and its design is very intuitive and easy to use. We personally take care of it a lot when it is necessary to solve a problem or unforeseen. I would highly recommend this to everyone.”
Luis Reinaldo C., Commercial Engineer

Which Fax API Provider Is best?

Using API to fax directly from existing software or systems means more freedom to accomplish tasks quickly and efficiently. Therefore, choosing a secure and reliable Fax API provider can give you a competitive edge.

With the iFax Fax API, you don’t need to learn about complex codes or hire a team of developers to build an entirely new faxing system. All you need is to integrate our service’s fax functionality into the app or software you’re currently using. Once set, you can fax documents seamlessly in the comfort of your existing workflow.

“It is cheaper compared to other providers, the ease of use and its design is very intuitive and easy to use. We personally take care of it a lot when it is necessary to solve a problem or unforeseen. I would highly recommend this to everyone.”
Luis Reinaldo C., Commercial Engineer
Retarus vs iFax

Integrate a fully compliant fax service into your workflow

Switch to iFax for affordable and programmable FAX API that prioritizes security and ensures compliance with critical regulations like HIPAA, GLBA, and GDPR.
“Game Changer”

“Overall experience is amazing. We are not submitting documents to government agencies as they are completed without waiting weeks for the mail service to deliver them. Clients lives will be greatly impacted for the better as this has cut out waiting time. The ease of setup and the ability to send fax directly from my computer without having a dedicated phone line.”

Phillip B., Team Leader (Non-Profit)