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Retarus competitors & alternatives
The 12 closest competitors and alternatives to Retarus among cloud messaging and enterprise communication companies — ranked by similarity to what Retarus actually does, not by market-cap band.
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About Retarus
Retarus is a global provider of enterprise cloud services for messaging, email security, and business process integration.
Retarus at a glance
Retarus is a cloud messaging and enterprise communication company headquartered in Germany. Xcout tracks 16 named people at Retarus, including Robert Sandner (Chief Financial Officer).
Retarus leadership
- Robert SandnerChief Financial Officer
- Uwe GeussChief Technology Officer
- Florian KorhammerChief Information Security Officer
- Johanna LeitnerChief of Staff
- Kim DonlanChief Marketing Officer
- Josephine SchmidlGeneral Counsel
10 more named people on record for Retarus, with roles, board committees and tenure — see the full roster →
Top 12 Retarus competitors
Ranked by semantic similarity — how close each company is to Retarus by what it does, using Xcout's live company graph. Click any company for its full profile, or its competitor set.
Cloud Infrastructure
Infobip provides a cloud communications platform (CPaaS) that enables businesses to build omnichannel customer engagement experiences across channels like SMS, WhatsApp, email, and voice. Its solutions include programmable communication APIs, AI-powered chatbots, customer data platforms, and cloud contact center tools designed for enterprises and developers.
Cloud Infrastructure
Sinch provides a cloud communications platform and enterprise-grade infrastructure that offers APIs, applications, and network connectivity for messaging, voice, email, and video verification. The company serves developers, marketers, and enterprises globally, enabling them to execute marketing campaigns, send customer notifications, secure identity verification, and manage customer care operations.
Cloud Communications
MSG91 provides a cloud communication platform offering APIs and services for SMS, email, WhatsApp, voice, and authentication to help businesses engage with customers globally.
Email Infrastructure & Software
Mailtrap provides an email delivery platform offering email API/SMTP services, testing sandboxes, and marketing campaigns for developers and product teams.
Cloud Infrastructure
Yenlo provides global IT integration, API management, identity and access management, and iPaaS (Integration Platform as a Service) solutions. The company offers professional services ranging from solution architecture and software development to 24/7 managed support, helping organizations across various industries execute their digital transformation strategies.
Cloud Infrastructure
InterNetX GmbH provides domain management, DNS services, and digital encryption solutions such as TLS/SSL certificates to businesses, enterprises, and resellers worldwide. Through platforms like AutoDNS and domain robot APIs, the company enables clients to register, automate, and manage thousands of top-level domains and digital assets securely.
Telecommunications & Software
Seven.Tech is a provider and integrator of communication services, offering digital and mobile messaging solutions such as SMS, WhatsApp, and Viber APIs for businesses.
Cloud Communications
800 Bonnie Brae Blvd, LLC provides a cloud communications platform that enables software product teams to integrate SMS, voice, email, and user verification features into their applications through a single API and SDK. The company serves developers and businesses by offering programmable communication primitives, carrier routing, and message delivery infrastructure.
Developer Tools
Sensedia is a leader in multi-layer integrations with APIs, microservices, and events, providing enterprise solutions trusted worldwide. The company is headquartered in Campinas, São Paulo, Brazil.
Cloud Infrastructure
Solace provides an enterprise platform for real-time data streaming, event mesh messaging, and integration, helping businesses connect applications, devices, and legacy systems. The company serves enterprise customers across financial services, manufacturing, retail, and transportation to power event-driven architecture, APIs, and agentic AI solutions.
Developer Tools
Camunda is a German software company that provides a process orchestration platform for modeling, automating, and monitoring business processes and workflows. Its customers include developers and enterprise organizations that use standards such as BPMN and DMN to coordinate human tasks, business rules, and microservices across distributed systems.
Developer Tools
Nylas provides APIs and developer infrastructure for integrating email, calendars, contacts, and other communications capabilities into software applications. It serves developers and businesses building productivity, CRM, recruiting, scheduling, and other applications that need embedded communications functionality.
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