List of the Top 17 Application Server Software for Linux in 2025

Red Hat® JBoss® Enterprise Application Platform (JBoss EAP) provides excellent security features, outstanding performance, and scalability that are ideal for a variety of environments. JBoss EAP can be deployed on-premise, in virtualized environments, or over private, public, or hybrid clouds, thus facilitating faster application delivery in all scenarios. The newest version, JBoss EAP 7, is crafted to simplify deployment processes and includes extensive Jakarta EE capabilities, making it versatile for applications across all types of environments. Its cutting-edge modular architecture activates only the necessary services, resulting in improved efficiency. Designed for superior performance and flexibility, JBoss EAP 7 meets the demands of today's dynamic application ecosystems. This architecture, along with a component-driven service model, not only reduces scaling times but also enhances the adaptability of applications across various deployment contexts. By utilizing JBoss EAP, developers can swiftly adjust to the changing requirements of their business operations. Moreover, it is compatible with Jakarta EE and supports a range of web frameworks, including Spring, Spring Web Flow, Spring WS, and Spring Security, thereby ensuring a fluid development experience. Consequently, developers are empowered to create robust applications that can evolve alongside their business needs.

RasPiEsi, recognized as the smallest open source ERP application server leveraging Epesi, operates on a Raspberry Pi Zero that features a single core and 512MB of RAM. This server is a component of the Epesi ENS, which stands as the inaugural Free and Open Source Software Enterprise Neuronal System. The Epesi BIM stack functions on the LLMP architecture, which incorporates Linux, Lighttpd, a tuned version of MariaDB, PHP 7.4 FPM, and memcached ZRAM for enhanced performance. On November 4, 2023, neofetch integrated and upgraded 77 packages for its 1.1 (Joziu) version release. RasPiEsi emerged as the smallest Epesi Node I was able to construct, demonstrating an impressive RAM utilization of merely 133MB. This compact server efficiently runs Epesi, particularly when paired with a fast SD card, and is compatible with any Raspberry Pi model—from the budget-friendly $5 RPi Zero lacking WiFi, which has 1 CPU and 512 MB RAM (used to create the disk image), to the more powerful RPi 4—without necessitating any modifications. Notably, the RPi 3 operated seamlessly as well, requiring no adjustments other than simply swapping units. The project is licensed under the MIT License, with copyright held by Janusz and Karina Tilek in 2024, ensuring its continued open accessibility for future users and developers alike.

You have the ability to create, secure, and manage an entire range of features seamlessly. Everything you require to develop and protect your projects, automate your daily tasks, and shield yourself from potential vulnerabilities is accessible through a single dashboard. You can effortlessly add domains and subdomains, and transfer them between different subscriptions. Additionally, you can configure both DNSSEC and DNSSEC settings to enhance security. All domains can be protected using the SSL It! extension for added security. For Plesk Linux and Windows, Horde & RoundCube webmail solutions are available, and clients like Thunderbird and Outlook can be automatically configured with mail autodiscovery and SNI support. You also have the option to transfer databases between subscriptions while easily identifying which database corresponds to each website. MariaDB serves as the database solution for all customer websites now. Moreover, the newly designed File Manager simplifies your experience by offering mass upload and file search functionalities, making management even more efficient. This comprehensive approach not only enhances usability but also ensures that you have all necessary tools at your fingertips.

NGINX Open Source powers more than 400 million websites around the world. Building on this robust foundation, NGINX Plus functions as an all-in-one software solution that combines load balancing, web serving, and content caching capabilities. By choosing NGINX Plus over conventional hardware load balancers, businesses can explore innovative opportunities without the constraints of traditional infrastructure, resulting in savings exceeding 80% while still achieving excellent performance and reliability. This versatile platform can be deployed across various settings, which include public and private clouds, bare metal servers, virtual machines, and containerized environments. Furthermore, the built-in NGINX Plus API streamlines the completion of routine tasks, thereby boosting operational efficiency. In an era where agility is essential, today's NetOps and DevOps teams require a self-service, API-centric approach that integrates smoothly with CI/CD workflows, which not only accelerates application deployments but also enhances the management of application lifecycles. As technology continues to advance rapidly, NGINX Plus emerges as an indispensable resource for improving operational flexibility and optimizing the use of available resources. It is a pivotal asset for organizations aiming to stay competitive in a fast-paced digital world.

Apache TomEE, commonly known as "Tommy," is an application server that boasts full certification for Jakarta EE 9.1 and is built on the foundation of Apache Tomcat, starting from a standard Apache Tomcat zip file. The creation of TomEE begins with Apache Tomcat, and through the integration of essential libraries, it evolves into a packaged version that encompasses EE capabilities, resulting in the TomEE server. This server is recognized for its stability and readiness for production environments, as Apache TomEE 8.0 implements Java EE 8/Jakarta EE 8 while still supporting the javax namespace and functioning on Java 8 or later versions. It aligns primarily with the Jakarta EE 9.1 web profile and adopts the new jakarta namespace, ensuring compatibility with Java 11 or newer. There are four distinct variations of Apache TomEE available: web profile, MicroProfile, Plus, and Plume. The web profile variant of Apache TomEE delivers fundamental services such as servlets, JSP, JSF, JTA, JPA, CDI, bean validation, and EJB Lite, forming the core of the server's functionality. Meanwhile, the MicroProfile edition enriches the server with extended support for MicroProfile features, while the Plus and Plume versions further broaden capabilities by incorporating JMS, JAX-WS, and additional functionalities. In summary, Apache TomEE serves as a flexible and powerful option for developers who aim to utilize Jakarta EE in their software projects, making it an ideal choice for modern application development.

Apache Geronimo is a suite of open-source initiatives designed to provide JavaEE/JakartaEE libraries complemented by Microprofile implementations. Our primary goal is to offer reusable components that are not only extensively used but also well-maintained, ensuring developers have access to reliable tools. This framework delivers powerful libraries that comply with the specifications set forth by Java EE and Jakarta EE, while also placing a strong emphasis on OSGi bundle metadata for enhanced modularity. The XBean project aims to create a server with a plugin-based architecture akin to that of Eclipse's IDE, which will facilitate the discovery, download, and installation of server plugins from a centralized online repository. Additionally, the framework is versatile, supporting various IoC systems, and can operate seamlessly without one, while also providing JMX capabilities without the need for JMX-specific code. It effectively manages lifecycles and class loaders, and offers smooth integration with Spring to enhance functionality. Moreover, Apache Geronimo includes several Microprofile implementations and works on the Apache Geronimo Arthur project, which aspires to create a lightweight framework over Oracle GraalVM to augment its functionalities. Ultimately, Apache Geronimo is dedicated to continuously evolving to meet the diverse requirements of developers within the Java ecosystem, ensuring that the framework remains relevant and useful in a rapidly changing technological landscape.

NGINX Unit is a flexible web application server that consolidates various components of the standard application stack into one cohesive unit, thereby optimizing the architecture for both web applications and APIs. Serving as a universal platform, it supports a wide range of web environments, from extensive enterprise applications to individual personal sites. Its strength lies not only in facilitating modern microservices architectures but also in the ability to modernize legacy monolithic applications. Crafted by the original creators of NGINX, this innovative platform is constructed from a brand-new open-source codebase. The design benefits from over a decade of insights gained from managing the world's most popular web server. Unlike the conventional NGINX web server, which primarily operates as a reverse proxy for web applications, NGINX Unit can directly run application code, offering a distinctive advantage. This capability makes it particularly appealing to developers aiming to boost both performance and operational efficiency, ultimately positioning NGINX Unit as a valuable tool in the arsenal of modern web development.

Application servers that are suitable for production or containerized environments and support Jakarta EE and MicroProfile include a variety of options tailored for modern software development and deployment needs. These servers facilitate robust application development while ensuring compatibility with the latest enterprise standards.

Don't compromise on the conventional security, throughput, and expenses associated with your current web application framework. Certified with JAVA EE 7, JEUS 8 serves as the web application server designed to facilitate the development, execution, and management of web applications. This platform enables the rapid creation of cloud environments and efficiently handles large-scale transactions. Meanwhile, WebtoB emerges as a cutting-edge web server that addresses the inherent structural issues found in traditional web servers. It boasts improved security features, robust error handling, and the capability to manage high-volume transaction processing. When utilized in conjunction, these products can significantly enhance overall performance and minimize network congestion, especially when deployed across separate servers. Together, they represent a unified approach to modern web application development and management.

The Simple Application Server serves as a sophisticated computing solution tailored for independent application requirements. Its one-click deployment feature simplifies a multitude of services, such as domain name resolution, website publishing, security, operations and maintenance, and application management, ultimately improving the user experience for individuals setting up basic applications. This service is especially advantageous for beginners who are exploring cloud computing options, as it greatly simplifies the entire setup process. Users are presented with a range of pre-configured application images, including popular platforms like WordPress, LAMP, Docker, Plesk, and cPanel, which allows them to leverage ready-to-use applications without the inconvenience of manual uploads or installations. Moreover, it provides a clean operating system devoid of any pre-installed software, giving users the freedom to install applications that specifically meet their business requirements. The operating system images are aimed at those who possess a solid grasp of operating systems and application environment configurations. In addition, users can create custom images for more efficient deployment of multiple Simple Application Servers, which enhances operational flexibility. This capability not only allows businesses to adjust their server environments effortlessly but also ensures that they can respond swiftly to changing needs and demands in the market. Ultimately, the Simple Application Server stands out as an essential tool for both novice and experienced users looking to optimize their application deployment processes.

CIQ enables individuals to achieve remarkable feats by delivering cutting-edge and reliable software infrastructure solutions tailored for various computing requirements. Their offerings span from foundational operating systems to containers, orchestration, provisioning, computing, and cloud applications, ensuring robust support for every layer of the technology stack. By focusing on stability, scalability, and security, CIQ crafts production environments that benefit both customers and the broader community. Additionally, CIQ proudly serves as the founding support and services partner for Rocky Linux, while also pioneering the development of an advanced federated computing stack. This commitment to innovation continues to drive their mission of empowering technology users worldwide.

A comprehensive "virtual data center" solution designed for the seamless administration, deployment, and management of advanced web services. This system adeptly supports a multitude of server types, complex deployments, geo-distributed infrastructures, and setups focused on disaster recovery and high availability. Utilizing state-of-the-art hypervisor technology alongside fast, scalable SSD block storage, it establishes a dependable framework for websites, web applications, and various online services. The platform is capable of hosting large, customizable virtual servers that can be adjusted whenever necessary, making it particularly suitable for demanding workloads. By harnessing the latest in hypervisor advancements and high-speed, expandable SSD storage, it is well-equipped to fulfill the requirements of contemporary businesses. This innovative system promotes the creation, rapid deployment, and uninterrupted operation of mission-critical applications. With its impressive vertical and horizontal autoscaling capabilities, it offers robust support for a variety of programming languages and frameworks, including Java, PHP, Ruby, Python, Node.js, and Golang, as well as container orchestration tools such as Docker and Kubernetes. Our services also include optional features aimed at ensuring security, optimizing performance, maintaining availability, and simplifying management processes. We take pride in providing customized solutions that cater to your precise requirements, whether they involve backup strategies, VPN services, high uptime demands, or data protection initiatives. By collaborating with us, you can enhance your infrastructure and guarantee that your services function seamlessly and effectively, paving the way for future technological advancements.

Caddy simplifies your infrastructure by taking care of TLS certificate renewals, OCSP stapling, serving static files, reverse proxying, and managing Kubernetes ingress, among other functionalities. Its modular architecture enhances capabilities within a single, compact binary that can be compiled for any operating system. With no dependencies, including libc, Caddy excels in containerized environments, allowing for deployment in virtually any setting. It seamlessly acquires and renews TLS certificates for your websites, incorporating OCSP response stapling as a standard feature. The advanced certificate management features offered by Caddy are some of the most reliable and sophisticated in the industry. Built using Go, Caddy boasts superior memory safety over servers constructed with C. A robust TLS stack, supported by the Go standard library, constitutes the backbone of a significant portion of global Internet traffic. Functioning as both a flexible, efficient static file server and a powerful, scalable reverse proxy, Caddy proves to be a versatile solution for myriad applications. Furthermore, its intuitive configuration and smooth integration processes make it an attractive choice for developers who prioritize both simplicity and effectiveness in their projects. Caddy's capabilities not only enhance performance but also contribute to a more secure online environment.

Practitioners working with microservices often realize that the majority of operational challenges faced during the shift to a distributed system arise from two main issues: networking and observability. The complexity involved in troubleshooting a network of interlinked distributed services is far more challenging than that of a conventional monolithic application. Envoy serves as a robust, self-contained server with a small memory footprint that can integrate smoothly with any programming language or framework. It provides advanced load balancing features, including automatic retries, circuit breaking, global rate limiting, and request shadowing, along with local load balancing tailored for specific zones. Additionally, Envoy offers extensive APIs that allow for dynamic configuration management, empowering users to adjust to evolving requirements. This adaptability, combined with its powerful functionalities, positions Envoy as an essential tool for enhancing the efficiency and reliability of any microservices architecture. As organizations continue to embrace distributed systems, the importance of tools like Envoy will only grow in significance.

TidalScale's groundbreaking software-defined servers represent a major leap forward in computing technology. By seamlessly integrating commodity servers, TidalScale's innovative software allows these servers to function as a single, cohesive unit. This integration is accomplished by aggregating and virtualizing the processing power, memory, and input/output capabilities of multiple physical servers, which are then presented to the operating system as one unified "software-defined server." The incorporation of TidalGuard™ technology further revolutionizes the system by allowing for the hot-swapping of individual servers, making it possible to perform upgrades or repairs without interrupting essential workloads. Notably, this process requires no changes to the existing application or operating system, making it incredibly user-friendly. The patented TidalGuard™ technology also significantly boosts the reliability of these software-defined servers, as it can detect and avert over 90% of hardware failures by facilitating the hot-swap of a defective server with a backup. In the rare case of a server failure, the system is capable of promptly restarting with the spare server, usually within a matter of minutes, which helps maintain operational continuity. This state-of-the-art methodology not only enhances overall performance but also greatly improves system resilience in mission-critical environments, ensuring businesses can operate smoothly even in challenging conditions. Overall, TidalScale’s advancements are paving the way for a new era in computing infrastructure.

Apache Tomcat® is a free and open-source software that implements the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, Jakarta WebSocket, Jakarta Annotations, and Jakarta Authentication specifications, which are all part of the Jakarta EE framework. This adaptable software plays a crucial role in a wide range of large-scale web applications that various sectors and organizations rely on. Users can share their experiences and insights on the PoweredBy wiki page dedicated to Tomcat. The Apache Tomcat Project is thrilled to unveil version 10.0.10 of Apache Tomcat, which includes updates from the Jakarta EE 9 platform. This latest iteration is designed to boost performance while delivering enhanced features that benefit developers and organizations across the board, ensuring they stay competitive in an evolving digital landscape. With each new release, the community looks forward to further innovations and improvements that will continue to facilitate the development of robust web applications.

Our efficient alternative to Apache conserves resources while maintaining high standards in performance, security, compatibility, and ease of use. LiteSpeed Web Server employs an event-driven design that significantly increases the performance capacity compared to traditional Apache servers. It is adept at managing thousands of simultaneous users while utilizing only a fraction of memory and CPU power. Additionally, it comes pre-configured with ModSecurity rules to safeguard your servers from various threats. Users can benefit from numerous integrated anti-DDoS options, such as bandwidth management and connection rate limiting. By implementing LiteSpeed, you can cut costs by decreasing the number of servers necessary to support your expanding web hosting enterprise or online service. Furthermore, it simplifies your infrastructure by removing the requirement for an HTTPS reverse proxy or separate caching solutions. LiteSpeed Web Server is capable of directly loading Apache configuration files and supports all Apache functionalities, including ModSecurity and the Rewrite Engine, providing seamless transition and operation. This makes it an ideal choice for businesses looking to enhance their server performance while also reducing operational complexity.