Software Alternatives, Accelerators & Startups

Apache Tomcat VS Varnish

Compare Apache Tomcat VS Varnish and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Apache Tomcat logo Apache Tomcat

An open source software implementation of the Java Servlet and JavaServer Pages technologies

Varnish logo Varnish

High-performance HTTP accelerator
  • Apache Tomcat Landing page
    Landing page //
    2023-01-24
  • Varnish Landing page
    Landing page //
    2023-05-09

Apache Tomcat features and specs

  • Open Source
    Apache Tomcat is an open-source software, which means it is freely available for use and modifications. This can significantly reduce the cost of ownership and allows for customization.
  • Community Support
    Being a widely-used open-source server, Tomcat has a large and active community of developers and users who contribute to its documentation, plugins, and forums, providing extensive support.
  • Lightweight
    Tomcat is designed to be a lightweight servlet container, making it faster and less resource-intensive compared to full-blown Java EE application servers.
  • Integration with Popular Frameworks
    Tomcat integrates well with popular Java frameworks such as Spring and Hibernate, making it easier for developers to deploy and manage web applications.
  • Easy to Set Up and Configure
    Tomcat is relatively easy to set up and configure, making it suitable for both development and production environments.
  • Frequent Updates
    Regular updates and patches are released to improve performance, security, and compatibility, ensuring the server is up-to-date with the latest web technologies.

Possible disadvantages of Apache Tomcat

  • Limited Functionality
    While Tomcat is a powerful servlet container, it lacks some of the advanced features found in full-fledged Java EE application servers, which might be necessary for complex enterprise applications.
  • Resource Management
    Tomcat's default configuration might not be suitable for high traffic web applications, requiring significant tweaking and tuning to handle heavy loads effectively.
  • Documentation Quality
    The documentation, while extensive, can sometimes be hard to navigate and understand, especially for beginners. This can slow down the learning curve.
  • Limited Built-in Tools
    Compared to other full-stack application servers, Tomcat comes with limited built-in tooling for monitoring, load balancing, and clustering, often requiring third-party solutions.
  • Security Concerns
    As with any open-source project, security vulnerabilities may emerge. It requires constant monitoring and timely updates to ensure security.
  • Lack of EJB Support
    Tomcat does not support Enterprise JavaBeans (EJB), limiting its use in scenarios where EJB is a crucial component of the architecture.

Varnish features and specs

  • Caching Efficiency
    Varnish is highly efficient at caching, which significantly reduces the load on the web server by serving cached content quickly, improving response times for users.
  • Flexibility with VCL
    Varnish Configuration Language (VCL) allows for flexible and powerful configurations, enabling users to customize caching policies and behaviors to meet specific needs.
  • High Performance
    Varnish is designed to handle a large number of requests per second, making it suitable for high-traffic websites seeking to improve their performance and scalability.
  • HTTP Support
    Varnish supports HTTP/1.1 and can be configured to work with HTTP/2, effectively caching HTTP protocol responses and requests.
  • Grace Mode
    Grace Mode is a feature in Varnish that allows serving stale content while fetching fresh content from the server, minimizing downtime during backend failures.

Possible disadvantages of Varnish

  • Steep Learning Curve
    Varnish's powerful configuration options, specifically VCL, can be complex for new users to learn and manage effectively, potentially leading to misconfigurations.
  • Lack of SSL/TLS Support
    Varnish does not natively support SSL/TLS termination, requiring additional tools like Nginx or Hitch for handling HTTPS connections.
  • Limited Built-in Security Features
    Varnish lacks built-in security features such as web application firewall (WAF) capabilities, requiring additional layers to secure web applications.
  • Resource Intensive
    Depending on the configurations and traffic patterns, Varnish can be resource-intensive, necessitating careful management of system resources.
  • Complex Debugging
    Debugging issues in Varnish can be challenging due to its complex configurations and log outputs, often requiring in-depth knowledge and specific tools.

Apache Tomcat videos

Introducing Apache Tomcat 8.5

More videos:

  • Review - Webinar: Introduction to Apache Tomcat 8
  • Review - Tcat - The Leading Enterprise Apache Tomcat Application Server

Varnish videos

Product Review 33 - AK Interactive Ultra Matte Varnish

More videos:

  • Review - Gamvar vs Liquitex - Acrylic Paint Varnish Review
  • Review - (473) Liquitex varnish review gloss vs. Matte

Category Popularity

0-100% (relative to Apache Tomcat and Varnish)
Web And Application Servers
Proxy Server
0 0%
100% 100
Application Server
100 100%
0% 0
Key-Value Database
0 0%
100% 100

User comments

Share your experience with using Apache Tomcat and Varnish. For example, how are they different and which one is better?
Log in or Post with

Reviews

These are some of the external sources and on-site user reviews we've used to compare Apache Tomcat and Varnish

Apache Tomcat Reviews

FOSS | Top 15 Web Servers 2021
Java programs are run using Apache Tomcat. To be more precise, it is a Java servlet – a Java software component that expands the functionality of a web server. Apache Tomcat, released under the Apache License version 2, is used by 0.1% of websites worldwide.
Source: www.zentao.pm
4 Open Source Application Servers (Comparison and Review)
Apache Tomcat is an open-source implementation of several Java technologies. It is the result of a collaboration of the finest developers worldwide. You can get involved with the development in a number of ways.
Source: shadow-soft.com
Top 5 open source web servers
Apache Tomcat is an open source Java servlet container that functions as a web server. A Java servlet is a Java program that extends the capabilities of a server. Although servlets can respond to any types of requests, they most commonly implement applications hosted on Web servers. Such web servlets are the Java counterpart to other dynamic web content technologies such as...
Source: opensource.com
Top 10 Open Source Java and JavaEE Application Servers
It is built upon a modular kernel powered by OSGi, and runs straight on top of the Apache Felix implementation. It is also capable of running with Equinox OSGi or Knopflerfish OSGi runtimes. HK2 abstracts the OSGi module system to provide components, which can also be viewed as services and injected into the run time and uses a derivative of Apache Tomcat as the servlet...

Varnish Reviews

We have no reviews of Varnish yet.
Be the first one to post

Social recommendations and mentions

Varnish might be a bit more popular than Apache Tomcat. We know about 18 links to it since March 2021 and only 17 links to Apache Tomcat. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Apache Tomcat mentions (17)

  • Java News: WildFly 36, Spring Milestones, and Open Liberty Updates
    Versions 11.0.6 and 9.0.104 of Apache Tomcat deliver new features and improvements. The release notes can be found for both versions. - Source: dev.to / 30 days ago
  • Artifactory: Centralizing Artifact Management for DevOps Success
    Download and Install Tomcat Before downloading, confirm the latest Tomcat build package from the official website. - Source: dev.to / 7 months ago
  • How to Deploy Applications Using Tomcat on a Web Server
    First, download the latest version of Tomcat from the official Apache Tomcat website. Choose the version that suits your needs, typically the latest stable release. - Source: dev.to / 11 months ago
  • Spring Boot Monitoring with Open-Source Tools
    Manual instrumentation allows you to define your Spans within the code itself rather than relying on automatic instrumentation finding the entry point for a trace. Manual instrumentation is especially helpful for applications that don’t use an application server such as Tomcat, JBoss, or Jetty. - Source: dev.to / over 1 year ago
  • Issue with chatgpy
    99% is a huge exaggeration. Two essential deployment tools off the top of my head: Https://tomcat.apache.org/ Https://docs.jboss.org/author/display/AS71/Developer%20Guide.html. Source: about 2 years ago
View more

Varnish mentions (18)

  • How to Increase API Performance
    Caching helps minimize backend strain, reduce delays, and handle more requests, which translates to better scalability, smoother user interactions, and smarter resource use. Tools like Redis and Varnish have shown impressive results in high-demand API setups [1]. - Source: dev.to / 3 months ago
  • API Caching: Techniques for Better Performance
    Varnish Cache — A web application accelerator that serves as an intermediary between web clients and servers. It provides logging, request inspection, authentication and authorization, and throttling. Varnish can also enhance security as a web application firewall, hotlinking protector, and DDoS attack defense tool. - Source: dev.to / 7 months ago
  • Varnish Cache
    Varnish Cache is a tool that provides a caching HTTP reverse proxy in order to accelerate your web applications. Once Varnish Cache is installed in front of any server that understands HTTP and configured to cache the contents, delivery speeds are typically enhanced by a factor of 300-1000x, depending on architecture. Kilobyte22 finds this tool along with HAProxy to be a winning combo. Source: almost 2 years ago
  • Leveraging Cache to improve Web Performance
    In this case, caching mechanism is situated in the proxy server or reverse proxy server like Nginx, Apache, or Varnish, and most probably it is a part of ISP (Internet Service Provider). - Source: dev.to / about 2 years ago
  • Beyond Changing Technology: Scaling Your Applications Efficiently
    To handle this level of traffic, you can use tools such as Varnish HTTP Cache, which caches the information of a news article starting from the first user who accesses and makes the request. Once Varnish caches the page, subsequent users will receive a response that is saved in memory. This process allows you to avoid unnecessary synchronous requests and send a quick response to users. - Source: dev.to / about 2 years ago
View more

What are some alternatives?

When comparing Apache Tomcat and Varnish, you can also consider the following products

Microsoft IIS - Internet Information Services is a web server for Microsoft Windows

Squid Proxy - Website Content Acceleration and Distribution. Thousands of web-sites around the Internet use Squid to drastically increase their content delivery. Squid can reduce your server load and improve delivery speeds to clients.

LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996

memcached - High-performance, distributed memory object caching system