Discord is a popular chat service used by communities of all sorts, including open source development teams and gamers. It makes it easy to keep up-to-date with what's going on in your organization from any computer or mobile device.
Review Board can talk to Discord, notifying any given channel when there are new review requests or updates to review, or new discussions on a review request that you might want to pay attention to.
Support for Discord is included in Review Board 4.0 and higher. You can make as many configurations as you like, controlling which review requests can be posted for which teams to which channels. See the documentation on getting set up.
What else does Review Board do?
Review Board gives you the tools you need to keep your code quality high, helping you build better products for happier customers. It integrates with many services and tools, including chat services, code hosting solutions, bug trackers, code analytics, and more.
Power Pack enhances Review Board further, providing document review, report generation, improved scalability, and more for your whole organization.