Software Alternatives, Accelerators & Startups

Varnish VS Apache Traffic Server

Compare Varnish VS Apache Traffic Server and see what are their differences

Varnish logo Varnish

High-performance HTTP accelerator

Apache Traffic Server logo Apache Traffic Server

Fast, scalable and extensible HTTP/S 2 and 1.1 compliant caching proxy server.
  • Varnish Landing page
    Landing page //
    2023-05-09
  • Apache Traffic Server Landing page
    Landing page //
    2018-09-29

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 Traffic Server features and specs

  • High Performance
    Apache Traffic Server is designed for high-speed caching and can handle large volumes of traffic efficiently. Its architecture allows it to serve requests with low latency, making it suitable for high-traffic websites and applications.
  • Scalability
    It offers robust scalability features, allowing it to manage multiple terabytes of data and scale up to handle many clients simultaneously, which is beneficial for growing businesses and expanding infrastructure.
  • Extensibility
    Traffic Server supports plugins and extensions, enabling developers to customize and extend its functionality to suit specific needs, which adds flexibility for unique requirements.
  • Open Source
    Being an open-source project, Apache Traffic Server offers a free solution with a strong community support, allowing users to collaborate and contribute to its development and troubleshoot issues.
  • SSL Termination
    It provides the capability to handle SSL termination, which offloads the burden from backend servers, improving overall security and performance for HTTPS traffic.

Possible disadvantages of Apache Traffic Server

  • Complex Configuration
    The configuration of Apache Traffic Server can be complex, especially for beginners, which might require a steep learning curve and extensive documentation reading or seeking community help.
  • Limited Windows Support
    Traffic Server is primarily developed for Unix-based systems and has limited support for Windows, which can be a limitation for organizations that primarily operate in a Windows environment.
  • Community Support
    While it benefits from open-source community support, it may not have the same level of professional support or comprehensive documentation as some commercial alternatives, potentially leading to slower resolution of issues.
  • Resource Intensive
    When handling large amounts of traffic, Apache Traffic Server can become resource-intensive, which may necessitate higher hardware investments to maintain optimal performance.

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

Apache Traffic Server videos

Transparent HTTP proxying with Apache Traffic Server

More videos:

  • Review - Yahoo's Adventure with Apache Traffic Server - Shu Kit Chan, Vijay Prashanth Hosahithlu

Category Popularity

0-100% (relative to Varnish and Apache Traffic Server)
Proxy Server
42 42%
58% 58
Key-Value Database
100 100%
0% 0
Proxy
44 44%
56% 56
DevOps Tools
0 0%
100% 100

User comments

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Social recommendations and mentions

Based on our record, Varnish should be more popular than Apache Traffic Server. It has been mentiond 18 times since March 2021. 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.

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
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Apache Traffic Server mentions (6)

  • API Caching: Techniques for Better Performance
    Apache Traffic Server — A free, fast, and scalable HTTP caching system that improves network efficiency. It supports forward and reverse proxy caching and is configurable to run simultaneously on either or both options. It also provides authentication and basic authorization through plugins. - Source: dev.to / 7 months ago
  • Wikipedia now has up to 1000X reduction of ATS disk read latency at the p999
    Apache Traffic Server: https://trafficserver.apache.org/ Here’s how they use it along with Varnish: https://wikitech.wikimedia.org/wiki/Caching_overview. - Source: Hacker News / over 2 years ago
  • How does Content delivery/distribution network work?
    The LARGE majority of CDNs use either Apache Traffic Server (https://trafficserver.apache.org/) or Nginx for their cache webserver, so the mechanisms used are pretty easy to find if you look through the docs. Source: almost 3 years ago
  • Using Nginx as an Object Storage Gateway
    Apache Traffic Server (no relation to Apache itself) would be an excellent option: https://trafficserver.apache.org/. - Source: Hacker News / over 3 years ago
  • Build a CDN in about 5 hours
    We have choices. We could use Varnish (scripting! Edge side includes! PHK blog posts!). We could use Apache Traffic Server (being the only new team this year to use ATS!). Or we could use NGINX (we're already running it!). The only certainty is that you'll come to hate whichever one you pick. Try them all and pick the one you hate the least. - Source: dev.to / almost 4 years ago
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What are some alternatives?

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

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.

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

3proxy - 3proxy freeware proxy server for Windows and Unix. HTTP, SOCKS, FTP, POP3

memcached - High-performance, distributed memory object caching system

CCProxy - Want to share Internet connection? Get every computer online through a single Internet connection?

WinGate - WinGate is highly capable web proxy software for Windows: caching, intercepting, forward and reverse proxy with https inspection and SSL offload, SOCKS server, email