Crucible vs Upsource comparison

Crucible enables you to review code, discuss changes, share knowledge, and identify defects across SVN, Git, Mercurial, CVS, and Perforce. It creates formal, workflow-based, or quick code reviews and assign reviewers from across your team, turns any code review into a threaded discussion and comment on specific source lines, files, or an entire changeset, takes action on what's important with unified views into your code activity for commits, reviews, and comments, improves code quality with data on which parts of your codebase have not been sufficiently reviewed. Get a quick view of review status and who might be holding up reviews and access a complete audit trail with all code review details, down to the history of a specific review.

Upsource let's you set up triggers to automatically create code reviews and assign reviewers based on a number of criteria. Upsource provides syntax highlighting for dozens of languages and having IntelliJ IDEA core in it, Upsource boasts in-depth knowledge of these languages and provides server-side static code analysis, code-aware navigation, and search for usages. Upsource provides team collaboration that participate in discussions, @mention other users, and share everything with a URL, including code, revisions, diffs, code reviews, search filters, files, and even code selections and Upsource offers a distributed cluster setup that can accommodate hundreds of projects, serve thousands of users, and ensure 24/7 availability and fault tolerance.