collabedit is described as 'Real-time, browser based, collaborative text editor. It supports syntax highlighting for several programming languages, has integrated chat, requires no sign up and is very simple to use' and is an website in the Office & Productivity category. There are five alternatives to collabedit, not only websites but also apps for Self-Hosted solutions and SaaS. The best alternative is Plunker, which is both free and Open Source. Other great sites and apps similar to collabedit are CodeBunk (Paid), Squad (Freemium), Rustpad (Free, Open Source) and evocode (Free).
Squad is a collaborative web-based code editor with one goal: to make it easy to open, edit, and share code in real time. Our powerful, secure tools include syntax highlighting, cloud hosting, a searchable chat log, and multiple syntaxes.