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JRebel Reviews & Product Details

JRebel is a productivity tool that allows developers to reload code changes instantly. You just save, refresh, and see the changes right away. To achieve this, JRebel does not wrap classloaders around classes, but patches existing classloaders to make classes loaded through them reloadable using instrumentation. JRebel tracks changes that you make in your workspace, and updates them as you go, so you can keep focused on the code and stay in the zone without interruption. As a JVM plugin, JRebel supports a majority of real-world enterprise Java stacks and is easy to install into existing development environments. With support for over 100 frameworks, and many popular application servers, IDEs, and JVM languages, JRebel works out of the box for almost every stack.

Seller

Perforce

Product Description

JRebel is software for development and operations teams working with Java. JRebel allows users to instantly reload changes to Java classes, resources, and 80+ frameworks, configuration, and compiles quickly with the IDE, instead of Maven builds.

Overview by

Courtney Hendrickson

Value at a Glance

Averages based on real user reviews.

Perceived Cost

$$$$$

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JRebel Media

JRebel Demo - Inside look at the JRebel plugin

JRebel is a JVM plugin that works with all top IDEs or as a standalone tool.

It's easy to get started with JRebel, no matter what dev stack or JVM you are using.

JRebel Demo - A Look at the JRebel Setup Guide

With built-in instructions and support, you'll save time and get started sooner.

JRebel Reviews (19)

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Paras V.

Mid-Market (51-1000 emp.)

3/13/2023

"JRebel: The Ultimate Tool for Java Developers"

5/5

What do you like best about JRebel?

JRebel makes it simple for me to create Java code for my applications because it offers popular Java development tools like IntelliJ IDEA, Eclipse, and NetBeans and necessitates little setup and preparation. I can test new code immediately in JRebel, reducing the chance of introducing bugs and errors into the codebase. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

While working with this software sometimes I faced some technical issues or lagging other than this the cost of this software may object to its accessibility among small enterprises or businesses otherwise there is no problem with it. Review collected by and hosted on G2.com.

Neeraja V.

Senior Developer

Information Technology and Services

Enterprise (> 1000 emp.)

12/9/2021

"JRebel - Splendid Java-based project development tool for our customer application build & delivery"

3.5/5

What do you like best about JRebel?

We employ JRebel in our organization thanks to its brilliant platform for our java application development. Code changes made within JRebel are fast and efficient, and we don't have to worry about redeployments in case of application failovers. It saves us plenty of time as it ensures us visibility of these modifications in real-time and clarity on the impact of these code changes on our application environments. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

It preserves the state of our java application in such a way that we don't have to worry about the underlying dependencies and configurational changes to the code. We simply focus on our customer standards for building our java applications, and it ensures their satisfaction to a great extent. So nothing to dislike about JRebel. Review collected by and hosted on G2.com.

What problems is JRebel solving and how is that benefiting you?

We incorporate the features that JRebel provides for java application builds with the help of Eclipse IDE. We have licensed JRebel from Eclipse Marketplace and leverage its data connectors, application integrators, and other plugins, which are very convenient to develop our java application. JRebel enables secure credentials authentication in which we just keep our secrets in our local repository and import the file into our java project. This feature ensures to maintain the password integrity, and since the function call happens from Import, the end-user won't know the credentials as they are referenced from our local repository file. Dependency management is fantastic in JRebel as we clearly define all our dependencies in a declarative code structure, and JReact takes care of its mapping and utilization aspects thanks to its application integration and custom module framework. Review collected by and hosted on G2.com.

Zvjezdan G.

Software Architect

Small-Business (50 or fewer emp.)

11/4/2021

"Instant gratification"

5/5

What do you like best about JRebel?

Time saving... it makes the coding a much more fluent exercise. Quick tweaks not requiring another five minutes for restart (at least) in order to be verified is appreciated. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

Sometimes it doesn't actually pick up changes. Using it integrated with IntelliJ and running WebLogic with some microservices thrown in the mix. Some changes are not being picked up and hard to explain as to why. So at that point restart becomes necessary. Review collected by and hosted on G2.com.

Recommendations to others considering JRebel:

Just do it. Ever felt frustrated with constant server restarts, or felt that out-of-the-box jvm code hot swaps are lacking... then Jrebel is the solution. Along with Xrebel... amazing with for instance sql analasys, real saver. Review collected by and hosted on G2.com.

What problems is JRebel solving and how is that benefiting you?

Time saving is the biggest in terms of increased productivity ... and absence of building frustration for constant waits to see the small code tweaks in action. Review collected by and hosted on G2.com.

Juhan A.

Java Developer and System architect

Mid-Market (51-1000 emp.)

11/4/2021

"Make changes to your Java application as fast as you would be developing PHP"

5/5

What do you like best about JRebel?

I like that I don't have to wait to see the code changes that I have made.

I also like it is very robust and works with any kind of application server or configuration.

I like that the support is very helpful and really bothers to help me if I have a touch problem with setup. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

I have used it for many years and actually there are no negative sides. The license surely costs money but it is the money well spent and I get much more done with this saved time (so I earn more thanks to JRebel). Review collected by and hosted on G2.com.

Recommendations to others considering JRebel:

Give it a try. It is not that difficult to set up. And you get more time to spend with your family. Review collected by and hosted on G2.com.

What problems is JRebel solving and how is that benefiting you?

When developing large monolithic legacy applications then I can save several minutes every time I have made code changes. With JRebel I see them within a second - so it's just like developing PHP app.

Without JRebel I would have to log in and navigate to the component that I'm developing after each code change - I don't have this problem with JRebel. Review collected by and hosted on G2.com.

Mustufa K.

Senior Software Consultant

Enterprise (> 1000 emp.)

11/3/2021

"Works as expected"

4/5

What do you like best about JRebel?

I have used JRebel for a Java project using Oracle ADF. It worked great and saved a lot of time during development. It helped loading Java changes in weblogic without having to restart the server. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

Could be a bit costly if it's usage is not justified based on the time saved. A lot of development environments might be able to support other open source tools. Review collected by and hosted on G2.com.

Prathib K.

Technical Leader

Enterprise (> 1000 emp.)

11/3/2021

"Worked Great !!!!"

4/5

What do you like best about JRebel?

Improved Productivity a lot on a day-day basis Review collected by and hosted on G2.com.

What do you dislike about JRebel?

Agent has to be installed all the time to use Review collected by and hosted on G2.com.

Verified User in Insurance

Enterprise (> 1000 emp.)

11/3/2021

"Very handy tool for frequent development"

4/5

What do you like best about JRebel?

Automated Publishing code changes to local server Review collected by and hosted on G2.com.

What do you dislike about JRebel?

Configuration on the server might be tricky. Review collected by and hosted on G2.com.

Cristian B.

Senior Software Development Manager

Mid-Market (51-1000 emp.)

1/29/2019

"One of the best investments we made"

5/5

What do you like best about JRebel?

By removing the time needed for redeployment of the Java applications JRebel decreased the development time, increased the developers' focus on the task at hand, increased the productivity and therefore decreased the time to market of the new features. On top of all, it saves company money and you can even use a calculator in their User Interface to quantify it.

For example: a team of 2 Java developers with 4 redeployments per hour, 2 minutes each, JRebel will reduce the time wasted that costs $8000 per year, with a $25 cost per hour for a developer. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

The User Interface for managing licenses, reports, users is not user friendly enough. I had issues in the past while managing/allocating the licenses; we use a combination of dedicated and floating and it is not that straightforward to manage these in the UI. Review collected by and hosted on G2.com.

Recommendations to others considering JRebel:

Any Java developer should use JRebel. The time saved for redeployments translates into time spent actually working on the task and delivering it faster. It will make developers happier, project managers happier and the project goes to production sooner. Review collected by and hosted on G2.com.

What problems is JRebel solving and how is that benefiting you?

We have shorten the release cycle in an Agile Scrum model to less than 2 weeks, given that now we are able to do intermediate releases for small features during the sprint itself. Our customers are happier, the development team has more focus and a better sense of completeness. Review collected by and hosted on G2.com.

Verified User in Computer Software

Small-Business (50 or fewer emp.)

4/17/2019

"The speed we need"

4.5/5

What do you like best about JRebel?

How simple it is to install and use.

Allows you to apply changes made to the code to Java applications without the need to continually make redeploys in containers.

The amount of time you save in development. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

I think nothing, I have not calculated the amount of resources consumed in the computer, but I think it would be worthwhile. Review collected by and hosted on G2.com.

Recommendations to others considering JRebel:

It's simple, you just have to try it to see how much time is saved. Review collected by and hosted on G2.com.

What problems is JRebel solving and how is that benefiting you?

The great benefit of not having to make redeployments every time you make changes in the project.

If you calculate all that time at the end of the development, it is an incredible amount of hours. Review collected by and hosted on G2.com.

Gaurav B.

Senior Software Engineer

Internet

Mid-Market (51-1000 emp.)

4/4/2019

"Hot reloading is a must have feature."

4.5/5

What do you like best about JRebel?

We use to suffer a lot because even if we change one line of code we needed to restart and it used to take more then 40 mins to restart the server because we have a very heavy code base.

JRebel is very amazing and it hot reload the code so that we do not need to restart every-time we do the change.

It increase the productivity very much. Review collected by and hosted on G2.com.

What do you dislike about JRebel?

Sometime it is unable to hot reload, but very less. Review collected by and hosted on G2.com.