Caucho has over 7,500 licensed customers running high-traffic sites including CNet, Salesforce, The Toronto Stock Exchange, Kodak's Ofoto and Evite. In addition, Caucho's OEM and VAR program has licensed over 6,000 application servers.

Selected Customers

"Salesforce.com has relied on Resin to run our market-leading CRM services for years. After evaluating competing products, we found Resin to be the most reliable, scalable and cost-effective solution."

Dave Moellenhoff, CTO, Salesforce.com

"Resin's performance and reliability allows us to help secure over 65,000 websites. Resin consistently maintains the highest level of security when compared to other J2EE application servers."

Ben Tyler, VP of Engineering, ScanAlert

"We have been delighted with the performance and scalability of Resin in the Javalobby Network applications, We have always had great respect for the way Resin delivers outstanding speed while adhering closely to key Java standards. The switch to Resin was easy, and the pages fly from the server."

Rick Ross, founder and president of Javalobby

"We deployed our JIRA bug tracking application on Resin Professional and witnessed improved response times and stability. After having tried various free containers and a few commercial containers, Resin provides the best quality that we've found."

Bob McWhirter, The Codehaus founder and CEO of OpenXource

"Contegix is using Resin for deployments of J2EE applications for our managed customers that demand the utmost in performance and stability. We chose Resin for these specific reasons and Cauchoâ€™s dedication to customer support. The ability for our engineers to deploy Cauchoâ€™s products quickly, simply, and powerfully made the decision to use Resin a no-brainer."

Matthew E. Porter, Contegix CEO and co-founder

"We made the transition from Tomcat to Resin in January 2004. Since then, traffic has constantly kept growing to over 120 million page views per month. We strongly feel that Resin is not just a business product, but more of a piece of art built by an IT company taking pride in its work."

Markus Ken Moriyama, Development Director of Wazap!, Japan's largest online gaming portal

"We have been using Resin for over eight years in a notoriously demanding environment. Resin has consistently provided us with the speed, resilience and flexibility we need to meet these goals, not to mention the first-class support provided by Caucho."

Carl Whalley, Software Development Manager
(customers include IBM, Sony Ericsson and British Telecom solutions)

"With Resin we have vastly reduced memory requirements by setting the startup-mode for each host and using shared libraries. OpenEdit hosting also uses the quick reload ability and the great performance of Resin to keep uptime in the high 99.99 percentile." Burkey added, "Resin and OpenEdit are a perfect combination to build fast, full featured and reliable web sites for clients."

Christopher Burkey, CEO of OpenEdit

"Once we made the move to Resin the availability of our services significantly increased... using Resin helps us scale and grow our services much more easily."

Maciej Bogucki, IT Administrator
Mobile Entertainment Europe

"Quercus provides the best of both worlds. We get to use PHP, one of the most popular web site building languages, for the front-end of our application and Java EE for the backend of our application. We could not have taken our application to the next level without it."

David Berry, CTO, LiveProcess, the leader in emergency preparedness planning for the healthcare industry

"After using almost every available application server on the market, Resinâ€™s stability, reliability, and advanced load-balancing make it the obvious choice for us.â€ Cruz added, "we selected Resin because of the demands that our high-visibility web site puts on server performance."

Brandon Cruz, CTO

"The performance we see in Resin is unmatched. We conduct over 100,000 tests per day to create the metrics we display on our web site, and we specifically selected Resin due to its speed and stability." Johnson added, "We know we can count on Resin to keep our metrics live and fast."

Kent Johnson, Chief Technology Officer, RealMetrics

"Resin was far and away the superior application server for us. It was blazingly fast and the installation literally took minutes. We could not break it and our concurrent load test maxed out before the application server did. We anticipate being able to handle several hundred thousand sales transactions on an incredibly small hardware footprint. The price performance is stellar."

Testimonial of e-gatematrix, provider of web based solutions for the airline industry including Delta Airlines, Air New Zealand and South African Airways

"Resin, a developer-centric product, is built from the ground up to make the developer's life easier, and makes it a natural fit for training. The dynamic deployment of JSP, Java classes, Java source files, and more makes Resin extremely easy to use, yet is still remains one of the fastest, most performant application servers on the market."

Rick Hightower, CTO, Trivera Technologies

"Resin offers incomparable flexibility, efficiency and reliability. Caucho Technologyâ€™s software has always been a leader in adopting new standards and new JDK releases, so why would you stay behind?" Kral added, "Resin has helped us by its simplicity and stability. Basically it has never ever crashed. Cauchoâ€™s technical support and documentation is also much better than that of Apache."

Xavier Xral, CTO of Javaground

"We selected Caucho Resin after evaluating many application server vendors. Caucho's raw speed, scalability features, simplicity, open source model, and cost model made it no contest. Our high availability assessment applications need to run on a large farm of servers and demand reliability and scalability for enormous loads. Other application servers are just filled with extensive and unnecessary components that add complexity, decrease performance and reliability, and add unnecessary costs."

Brian Maguire, Director of Product Development for Vantage

"At the enterprise level it's very important for web applications to be able to scale and when our customers ask us what web application server we recommend for use with our software, we are quick to recommend Resin because of it's outstanding performance and support for the Java Servlet specification."

Jeffrey Hoffman, President and CEO off webslingerz

"We use Resin as the Servlet engine for eRightsWEB, eMetaâ€™s hosted content commerce application. Because eRightsWEB serves commerce and user profile pages for our customersâ€™ content sites, scalability, reliability and security are critical. We chose Resin because we wanted a secure, high performance Java Servlet engine that supports clustering and failover at a reasonable price."

Evan Simeone, Product Manager for eMeta

"We initially moved to the Resin application server software four years ago when our application server was not adequately handling our increased traffic associated with the success of the Expresso project. By contrast Resin proved reliable, stable, easy to manage, and provided excellent performance to our customers. As a company resolving around our open source projects, we found Resin an affordable solution that met our budget, while performing as well as far more expensive application servers."

Raul Davidovich, Core Developer at Jcorporate

"Go2marine.com's Web site has been running on top of Resin since the Web site launched in 2001. We are delighted with the performance of Resin, which has allowed our site to run smoothly using minimal computing resources while still providing a very responsive Web site to our customers. Caucho has kept Resin updated with the latest J2EE specifications enabling us to leverage the latest advancements in Java servlet technology. These features have translated into shorter development time, which allows us to include new features on our site. Caucho's technical support has been excellent. Along with fixing bugs in a timely fashion, their support staff has been great in helping us leverage Resin's features in our Web applications."

Keith Fetterman, Go2Marine Chief Technology Officer

"The integrated application server had to be small, easy to install and support hot deployment. Resin was easily the best match for these requirements."

Ryan Dillon, Director of Code Canvas Technologies

"When appMail decided to launch a free service, we needed a cost effective application server that had proven reliability, was simple to configure, had built in clustering and was regularly updated. Resin was highly recommended to us and has been deployed since the beginning of the year. appMail.com utilizes XML, XSLT, Hibernate, Tiles, MySQL, SOAP and web services on Resin 3.0.9."

Martin Logan, appMail Product Developer

"We chose Resin for a number of reasons. In a previous development project we (My Dev Shop, Inc) had been using WebSphere. We had to reduce our costs so we began looking for a different App Server. We tested numerous applications servers and were not satisfied with their performance. We found Resin, tried it and were immediately impressed with how fast it is. We now use Resin for every data driven web application that we develop and host. Resin has been able to handle the load that our cellular retailers have placed on it."

Robert Brenchley, President of My Dev Shop Inc., and Inpowered Inc.

"We used JBoss server for two years, but I have to say we were disappointed because of the number of problems we encountered. JBoss crashed often and boot/deploy time was too slow. Performance was also poor and the configuration layer was terribly non-elastic. The first time we tried Resin we were shocked at how lightweight and smart it was. We thought Resin was going to be the solution to our problems, and it was! Now we have a much simpler J2EE environment; much more stable than before, and definitely more efficient."

Przemyslaw Budzik, az.pl J2EE Software Engineer

"Commission Junction's relationship with Caucho Technology has spanned several years now, and we have always found Resin to be extremely responsive to any issues we have. The features of Resin have been extremely beneficial as well: open source distribution is valuable for seeing under the hood; and the open SSL integration, with a straight forward, easily-understood standard implementation configuration, has enabled us to create a product which my whole team can understand. Resin has been a key part of helping us build a product that exceeds our competitions'."

John Locke, VP of Information Technology at Commission Junction

"We need the best in IT Technology. Over the course of the last five years, we have evaluated different application servers. Our evaluation process came to an end when we found Resin: The simplicity of the installation, the speed of the engine, and the competitive price convinced us entirely."

Dr. Patrick Brigger, CTO of getAbstract

"We are fanatical about availability and reliability. Resin has never let us down. Resin gives us the extreme performance, reliability, and scalability we demand from an application server. Yet, we also require flexibility. That's why we ardently support open source. With Resin we can be confident that we will always have the flexibility we need. As engineers, we have deep respect for elegantly designed and sturdily built products. That's why we chose Resin. Resin puts bloated black-box application servers to shame. With Resin, we can focus on what we do best -- building intelligent applications."

Tom Foley, Silver Egg Technology CEO and founder

"Ascendim uses Resin to run dozens of websites that individually may serve millions of dynamic pages per day. Resin's excellent performance, advanced functionality, and ease of use made it the obvious choice for our company."

Ryan Clifton, Ascendim's Director of Technology

"We rely on the Resin Application server, which has proven itself to be a high performance and low-cost application incorporating the latest Java technologies, XML, XSLT and load balancing. By underwriting the design using appropriate style sheets and by releasing a free license for Ant-On! Content Management, Home of the Brave has worked hard to promote the Mannheim-Heidelberg Film Festival."

Wolfgang Roth, Co-Founder and Managing Director of Home of the Brave (developers of the site)

More testimonials

I have worked with many different servlet engines (some are app servers too) like Jrun, jServ, Tomcat, Orion, WebLogic etc and in the neighbourhood of servlet/jsp engines your product has sold me as being the best of the breed. I'm also anxiously awaiting the newest version of your Resin Hardcore...

Keep up the good work.

John Bateman

We're using Resin with WebLogic because the JSP engine is faster, and the xsl transforms would be far too heavy to load onto a machine that is already bogged down with heavy EJB traffic.

It is also far easier (and cheaper) to cluster Resin to handle all of the servlets, JSPs and XSL transforms onto multiple heavy-weight servers than it is to keep spending money on licensing fees for clustered WebLogic licenses.

John Stotler

"Resin is by far the best JSP engine out. I've been using it with Apache on Solaris and also with IIS 5.0 on Windows2000. It it easy to configure and works very nicely."

Simon Orchanian

"I've been using Tomcat since it was first donated, submitted patches, and all that. I'm actually a lead contributor to the JAMES software that was just ported over to the Jakarta site. Anyway, nothing against those guys... I think the Tomcat group is doing an ok job, but I wholeheartedly recommend Resin over Tomcat. We've been using Tomcat across almost all of our projects, and we've been burnt a lot. Basically it's a reference implementation (not a production grade or commercial feature-filled server), which is fine because that's their objective... arbitrate over the specs and do an ok job implemented it. Anyway, we're in the middle of porting everything we can over to Resin.

I'm sure I'll get flamed for this, but I'm getting pretty sick of restarting this Tomcat server every few days that is handling about a million hits a month... it's all db driven and has some intense reports, but still, if I wanted this kind of total cost of ownership, I would have used Microsoft. :)"

Serge Knystautas

"I have to say that your dedication to helping Resin developers and continued improvement of an already-great tool are incredible and set an extremely high standard for the rest of the industry."

Given that everything you can do with weblogic you can do with Resin (or Resin + third party projects such as jBoss) for far cheaper, faster and with much less overhead, I'm convinced there's only two reasons anyone would use weblogic:

massive cost is self-justifying to the beanheads ("it must be the best!")
two words: Management Console. If you're in management, you need a console.

Guy McArthur

"Honestly you are really better off sticking with Resin. Indeed my experience with Tomcat was extremely frustrating. I would say the best thing about is the documentation available on caucho's web site. i found extremely well documented..."

The real advantage of Resin for us is its support for caching; Our pages are built up with "template JSPs" that includes 1..n JSPs for each "sub-part" of the page, where these sub-parts are cached individually (most of them are obtaining their data through beans which in turn uses JDBC to talk to our databases). Resin then takes care of all the caching issues for us, and we can enjoy a unix-server serving 1.6-2.0 mill. pageviews pr/month with almost no load (< 0.50), and database access is only needed when the given JSP needs to be refreshed because its cache TTL has expired (when cached the pages are served with the speed of static pages - or even faster than static pages served from disk when the cached JSPs are fetched from memory (!)).

Arne Solheim

"in that case use Resin! ... with Resin you just copy the updated source files and refresh the page! it really is very fast and easy to use..."

"I started using Tomcat here at work to prototype a new web site we're developing, but found the documentation to be very lacking. We then looked at Resin and found that along with great documentation it has excellent support... and the other people on this mailing list. I was on the Tomcat mailing list for a while and it seemed that 99% of the traffic was people asking things that should have been in the documentation if not at least in a FAQ.

I think Resin is much faster, easier to install/configure, and has much better support."

Matt Hixson

"Hey guys, I just wanted to thank you for the great project! I'm using Resin1.1b4 for an intranet site and the response time is so fast that users think we're using client-side scripting!"

I have been using the Struts framework almost since it came into being. At first, Struts and Resin had some disagreements. Those were worked out, with both parties interested in cooperating with each other. That was many months ago. Today, the combination of Struts + Resin provides a very powerful environment in which to develop web applications.

In contrast to how quickly problems are fixed in Resin and in Struts, I have read so many messages about problems with WebLogic that I am amazed that people would even pay for it. That it commands a price of around $15K per processor is completely mind-boggling...

Martin Cooper

"I am enjoying working with Servlets/JSP after ASP. They are actually very similar (I was quite surprised) and JDBC is very similar to ADO in a lot of ways. I am enjoying learning new things.

The great thing about RESIN for me is that I work in a total MS environment. Resin allows me to use java in that environment and that is great! Your product is excellent, and I will be doing everything I can to encourage my company to buy it."