“Software is eating the world,” said Netscape founder and tech investor Marc Andreessen. Line by line, hardware is being consumed by code, and Java is spoken by a massive army of hungry mouths.

However, since the programming language was introduced in 1996, developers have had to write Java code on their own machines and then upload their code to remote servers for testing.

The idea that would become a glass of ice water to coders in redeployment hell was born in Estonia in 2006. That’s when Jevgeni Kabanov found a way to address Java’s core problem – the redeployment bottleneck. His insight led to a start-up and two products that smart Java teams wouldn’t be caught without. In other words, magic happened.

Developers at thousands of companies around the world use JRebel to instantly view code changes without redeploying the application server.

The result? Happy coders writing and testing beautiful code. Happy customers enjoying time and money saved through all that beautiful, productivity-boosting code.

Today, ZeroTurnaround is the labor of love by a global team of 150+. The company’s go-to-market heart beats in Boston, Massachusetts, while our development feet are firmly planted (and rapidly growing) in Estonia, at two offices in Tallinn and Tartu. We also have a branch in Prague, Czech Republic.

We are dedicated to making developers lives better, and we now have over 65,000 active users at 5,200+ customers, including 36 of the Fortune 100, in 80+ countries.


We’re developers who make stuff for people just like us. Yes, our software is used by companies, from startups to well-known multinationals. But at their core, our products are consumer products. It’s a stroke of good fortune that our “consumers” happen to be other Java developers. You know, people like us. Here’s what some of them have said about life with the tools we’ve made.


We found it very useful to dig into the SQL queries. We quickly found some very lengthy and complicated queries. We also found that our session can get as large as 30 Mb - we had too many references to Spring beans in the session.

Federico Russo

Antea srl

JRebel Customer

Alterar método, adicionar atributos, criar classes, restart servidor, isso era um ritual a cada hora do meu trabalho. Com JRebel posso alterar qualquer código java que já é refletido na aplicação em funcionamento. Muito bom.

Claudio Miranda

Red Hat - Brazil

System Architect

Jrebel is so awesome it almost hurts. Or rather, not using it hurts.


JRebel Customer

JRebel saves a lot of frustration from dealing with JSF, JPA and Tomcat. One big thing is I don't need to start Tomcat every time to see my code!

Wonman Lee

Barloworld Handling LLC

IS Department

JRebel is easy to use right out of the box and fun to work with. It saves a lot of time in the development phase!

Hartmut Kalk

Comet Software

Software Architect

Over the last 265 days JRebel prevented at least 1,209 redeploys/restarts saving me about 49 hours.

Equity Trust Company

JRebel Customer

JRebel has transformed a nightmarish 10-minute modify, compile and debug cycle to a matter of seconds. Thanks for giving me back my sanity.

Joel Rosi-Schwartz

IG Group

Middleware Java Developer

I was attracted to JRebel because of its transparency, simplicity and efficiency. It's easy to set up and very nice to use!

Nikola Tankovic

Superius Ltd

Development Team Leader

Over the last 78 days, JRebel prevented at least 1774 redeploys/restarts, saving about 71.9 hours!

LSIS Laboratory

JRebel Customer

JRebel is really an amazing tool.


JRebel Customer

Con JRebel, salvar un archivo en el IDE y ver mis cambios inmediatamente en la pagina sin tener que volver a hacer "deploy", no tiene precio.

Maricel Quesada


Senior Java Developer

To whomever tells me 'I don't have time to lose trying to use JRebel', I would say 'You're actually losing time by NOT using it'

Aurelien Broszniowski

Software Engineer