Retarus - 2026 Pricing, Features, Reviews & Alternatives

NeverBusy-Technology: Reduce your fax transmission failure rate by up to 10% and reduce the administrative costs involved in manually processing your faxes. Retarus' NeverBusy Technology ensures that multiple faxes are never sent to the same recipient simultaneously. Thanks to this technology, even high volumes of incoming faxes are delivered immediately—no busy lines or capacity bottlenecks.

Scalable and Flexible: Eliminate over- and under-utilization of capacity with our online fax services and API. Regardless of whether you send 1,000 faxes today and one million tomorrow—the Retarus Enterprise Cloud provides you with the exact bandwidth you need at any given point in time without a single fax machine or traditional desktop-fax software in your office.

Intelligent Routing: Achieve up to 30% more throughput with Retarus' enterprise fax services using our cloud fax API. Active Carrier Management in the Retarus Enterprise Cloud automatically uses the lines and carriers whose line quality and availability best match your fax job. With Retarus you can also send your fax from any application - quickly and reliably.

Seamless Integration: Whether you use an ERP, a CRM or a legacy system, Microsoft 365, or Google Workspace — thanks to open standards, you can connect Retarus Cloud Fax Services to almost any business or cloud application. For example, via RESTful-API web service or via standard interfaces and protocols such as SMTP, SFTP and HTTPS.

OCR and Barcode Recognition: Retarus' enterprise fax services enable you to seamlessly integrate faxing into your workflows. Read out information or barcodes from incoming documents with the Retarus OCR and barcode recognition feature and then use customized smart routing options to presort, forward, store, or process the documents automatically according to your rules.

Monitoring and Analysis: Check the status of your fax communications at any time using dashboards and detailed reports in the web-based Retarus Enterprise Administration Services Portal. In real time or in user-defined periods. For both outgoing and incoming faxes.

Security and Compliance: Rely on maximum security. The Retarus Enterprise Cloud, with its global data centers, fulfills the most stringent country and industry-specific requirements for data protection and data security. For example, the GDPR, PCI DSS, or HIPAA.

Service and Support: Experience first-class support built on our expertise. The Retarus Service and Support Team is here to help you solve problems, answer your questions, or help you find the right solution for your needs. Anywhere in the world. You can even be assigned a personal service manager upon request.