Release 4 of Nginx Plus, the commercial version of the exceptionally popular open source web accelerator, is now available. The company says the new release responds to industry needs to accelerate distributed apps as they connect securely to external services. Release 4 also eases deployment of application components across clouds and on-premises locations.
Nginx is an open-source reverse proxy server, as well as a load balancer, HTTP cache, and a web server. The project started with a strong focus on high concurrency, high performance, and low memory usage.
According to W3Techs data, San Francisco-based Nginx, Inc., is the web-delivery tier of choice for the top 10,000 websites (Nginx has held the lead since last month, and led the top 1,000 busiest websites for more than a year).
The company claims to serve 146 million websites.

Robertson listed the following as key capabilities and benefits of Nginx Plus r4:
- Enhanced security for distributed applications
- Improved load balancing and caching
- Intelligent logging and detailed status monitoring
Nginx, Inc., formed in 2011, grew out of the Nginx open source project started in 2002. Funding began with a $3 million Series A round, followed by $10 million in a fully subscribed Series B round in October 2013. The company headcount is approaching 30.
