Sendero
Retarus
Retarus is a global secure communicatoin leader. We seek to be the trusted source for the best automated critical messaging for mid-sized to large enterprises, especially in highly regulated industries worldwide. We excel in providing businesses with modern, reliable and secure fax solutions, fully delivered via the cloud. Find out more: www.retarus.com/products/cloud-fax/
- Decades of experience: founded in 1992
- US HQ in Secaucus, NJ: Global HQ in Munich, Germany
- Offices and market coverage in North America, Europe, APAC
- 7 data centers (2 US, 3 Europe, 2 APAC)
- Gartner recognized as a global provider of enterprise cloud fax services
- #1 ranked Cloud Fax solution on Gartner Peer Insights: Overall rating of 4.7/5 (23 ratings) as of September 2025
- Customers include: JPMorgan Chase, Labcorp, Kroger, Travelers, Beth Israel Lahey Health
- Strategic Partners include: Accenture, Infosys, Kyndryl, T-Systems, and SAP
- True enterprise-grade provider: Performance, robustness, reliability, scale and service to fulfil the requirements of the world’s most demanding businesses
- Performance and reliability: Maximum delivery rates and quick transmission, even for high volumes or large faxes. Redundancies for maximum uptime, even during disaster situations
- Built for tech teams: Deep insights into in- and outbound traffic via reporting, in-depth user administration and customization, e.g. of cover pages, status reports, transmission quality, etc. All accessible via self-service web portal
- Migration and implementation: Standard migration paths, transparent project planning and management by seasoned migration experts with no failed migration projects in almost 30 years
- Customer support: Own, technical experts, available 24x7x365; 95% first call resolution rate
- Integrations: Certified connectors and open standards allow integration into almost any business application, including Salesforce, Epic, MS365, Oracle, and more.
- Company DNA: Private, boutique software provider – full focus on customer satisfaction and excellent technology, not investors or shareholders. Continued investments into product portfolio, including Cloud Fax.
Retarus provides cloud-based messaging services, including fax, SMS, and email security. Their solutions optimize communication processes, ensuring business continuity, security, and performance. Retarus serves Fortune 500 companies across various industries.
- John Paullin, Director of Sales Engineering, UC/CC/AI
- Size: >1000 employees or high fax traffic (e.g., laboratories, hospital networks, insurance)
- Requires mission-critical communication services via fax, email, or SMS
- Highly regulated (e.g. healthcare, finance)
- Complicated IT landscape, e.g. through various subsidiaries or past M&A
- Cloud-first, VoIP, or consolidation project. Elimination of POTS lines.
- Downtime or security breach of current vendor
Retarus Cloud Fax is a secure and compliant fax solution that helps businesses streamline their communication workflows. With Retarus, you can send and receive faxes directly from your email, ERP, or CRM system, saving time and reducing manual processes. Our solution uses encryption to protect sensitive data, ensuring compliance with industry-specific regulations like HIPAA and GDPR. Plus, our highly available infrastructure provides built-in redundancy, so your faxes are always delivered on time. Retarus Cloud Fax is the modern solution to outdated fax machines and a reliable way to communicate with your partners and customers.
Strongest industry fit
- Financial Services
- Healthcare
- Insurance
- Other
What we’ll ask before recommending them
- What does your fax process look like? Who sends faxes and how? Using fax machines, a desktop solution, or business applications?
- Do you currently have a cloudification, VoIP, Microsoft 365 migration, or similar project? How do you ensure functional performant faxing in the new setup?
- What is your company’s process for failed fax jobs? How much does each failed fax job cost your business?
- What’s your solution in case of a system failure of your communications infrastructure? How do you ensure business continuity?
- How much does an hour of downtime cost in lost revenue and productivity?
- Is there room for improvement in your fax processes? Better delivery rates or higher uptime and scalability?
Compare Retarus against competitors
Retarus is one of 74 providers we compare in UCaaS. We’ll run Retarus side-by-side against the alternatives on the requirements that actually matter to you — integrations, contract terms, support model, and real market pricing — and tell you honestly if a different provider fits better.
As your vendor-neutral Trusted Advisor, we can tell you honestly whether Retarus is the right fit — and compare it against every alternative in the market, typically at no cost to you.
