What is Varnish?

Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.
Varnish is a tool in the Web Cache category of a tech stack.
Varnish is an open source tool with 907 GitHub stars and 211 GitHub forks. Here鈥檚 a link to Varnish's open source repository on GitHub

Who uses Varnish?

Companies
9179 companies reportedly use Varnish in their tech stacks, including Pinterest, Twitch, and 9GAG.

Developers
1100 developers on StackShare have stated that they use Varnish.

Varnish Integrations

Datadog, Section, Blackfire.io, SignalFx, and Server Density are some of the popular tools that integrate with Varnish. Here's a list of all 6 tools that integrate with Varnish.

Why developers like Varnish?

Here鈥檚 a list of reasons why companies and developers use Varnish
Private Decisions at about Varnish
Private to your company

Here are some stack decisions, common use cases and reviews by members of with Varnish in their tech stack.

Varnish
Varnish

Content cache server Varnish

See more
Thomas Zickell
Thomas Zickell
CEO at Blueprint Marketing | 1 upvotes 0 views
Varnish
Varnish

it makes it very fast Varnish

See more
Andrei Kun
Andrei Kun
Senior Software Engineer at Yonder | 1 upvotes 0 views
Varnish
Varnish

As Web Cache on top of nginx Varnish

See more
Public Decisions about Varnish

Here are some stack decisions, common use cases and reviews by companies and developers who chose Varnish in their tech stack.

Tom Klein
Tom Klein
CEO at Gentlent | 9 upvotes 135.4K views
atGentlentGentlent
Git
Git
GitHub
GitHub
GitLab
GitLab
Docker
Docker
Kubernetes
Kubernetes
HAProxy
HAProxy
Varnish
Varnish
npm
npm
Visual Studio Code
Visual Studio Code

We're using Git through GitHub for public repositories and GitLab for our private repositories due to its easy to use features. Docker and Kubernetes are a must have for our highly scalable infrastructure complimented by HAProxy with Varnish in front of it. We are using a lot of npm and Visual Studio Code in our development sessions.

See more
Node.js
Node.js
Python
Python
MySQL
MySQL
Memcached
Memcached
nginx
nginx
RabbitMQ
RabbitMQ
Redis
Redis
Django
Django
Tornado
Tornado
Varnish
Varnish
HAProxy
HAProxy

Around the time of their Series A, Pinterest鈥檚 stack included Python and Django, with Tornado and Node.js as web servers. Memcached / Membase and Redis handled caching, with RabbitMQ handling queueing. Nginx, HAproxy and Varnish managed static-delivery and load-balancing, with persistent data storage handled by MySQL.

See more
Scott Prue
Scott Prue
at Kyper | 1 upvotes 7.3K views
atPruvitPruvit
Varnish
Varnish

Used as part of site hosting (Firebase HTTP Hosting manages implementation) Varnish

See more
Poogles
Poogles
| 1 upvotes 7.3K views
atThe IndependentThe Independent
Varnish
Varnish

Varnish sits as a secondary cache layer behind Akamai. Two servers operate in a Primary/Secondary configuration with failover managed by HAProxy. Requests peak at around 10k/s. Varnish

See more
Simone Marcato
Simone Marcato
Partner & CTO at Hevelop | 1 upvotes 7.3K views
atHevelopHevelop
Varnish
Varnish

Varnish is the http cache proxy we use to achieve maximum performance on high traffic e-commerce. Varnish

See more

Varnish Alternatives & Comparisons

What are some alternatives to Varnish?
nginx
nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server, written by Igor Sysoev. According to Netcraft nginx served or proxied 30.46% of the top million busiest sites in Jan 2018.
Redis
Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
HAProxy
HAProxy (High Availability Proxy) is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Apache Traffic Server
It is a fast, scalable and extensible HTTP/1.1 and HTTP/2.0 compliant caching proxy server.Improve your response time, while reducing server load and bandwidth needs by caching and reusing frequently-requested web pages, images, and web ser
Squid
Squid reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator. It runs on most available operating systems, including Windows and is licensed under the GNU GPL.
See all alternatives

Varnish's Followers
1083 developers follow Varnish to keep up with related blogs and decisions.
Rudger Gravestein
Alex Millet
Phil Wong
Krzsztof Kotewa
Jeffrey Holmes
David Carrascosa
Yaseen Sheriff
kristof leroux
Vaibhav Jain
kamel Miloudi