Zendesk

Business communication platform for channel-based messaging, huddles, workflow automation, and app integrations. Slack is used across internal teams and external partner workflows, with enterprise controls for search, identity, and compliance.

Open-source employee operations platform for small and midsize businesses. It combines recruiting, employee records, time tracking, internal communication, and one-on-ones in one Laravel application.

Open-source customer support platform that provides live chat, email support, and omnichannel messaging. Built with Ruby on Rails and Vue.js, it offers self-hosted and cloud deployment options.