The top most-reviewed Atlassian Marketplace apps in 2026 are draw.io Diagrams | UML, BPMN, AWS, ERD, & Flowcharts, Checklists for Jira (Free) by HeroCoders, Zephyr Essential - Test Management for Jira, Timesheets by Tempo - Jira Time Tracking, and ScriptRunner for Jira. These 50 apps have accumulated the most user reviews on the Atlassian Marketplace marketplace, regardless of star rating. Review count is the primary axis for established marketplace presence — apps with 10K+ reviews represent years of cumulative user adoption and are usually the de-facto standard in their category. AppRanks pulls review counts daily; ranking shifts within this list reflect real review velocity changes, not just a rating bump. For new merchants choosing an app, "most-reviewed" answers a different question than "highest-rated" — it surfaces what other merchants ARE using, not just what scores well in isolation. Review count is monotonically increasing for active apps, so position changes here mostly reflect new entrants overtaking incumbents rather than the leader losing reviews — a useful signal for spotting category-defining apps that have crossed the adoption threshold.