Jupiter vs Mosra

Jupiter is an open-source Learning Record Store (LRS) for collecting learning activity data using the xAPI and Caliper specifications. Its repository ingests Experience API and Caliper API payloads, and the maker describes it as scalable and fault tolerant. Jupiter includes Metis, an open-source interface for constructing queries and reviewing metrics. Metis presents results as tables or visualizations, exports them in multiple formats, and monitors cluster health with notices about network or hardware failures. The software can be self-hosted. Transcordia also offers Jove, a hosted LRS built on Amazon Web Services and powered by Jupiter; the maker says it can handle tens of thousands of learning events per second. Jove costs nothing for up to 1 million events per year. Above that allowance, the listed price is $1 a month for each 10,000 events per month. The repository identifies an MIT license, and the maker welcomes coding contributions and pull requests. Its stated audience includes educational institutions and research organizations.

Mosra is a lesson-authoring tool for creating interactive material that can be tracked by a learning management system. Lessons can include graded questions, object states, triggers and variables without code. Question formats include multiple choice, multiple response, true/false, dropdown, short answer, essay, hotspot and drag-and-drop. Exports cover SCORM 1.2, SCORM 2004, xAPI, cmi5, PPTX, PDF, HTML5, PNG, SVG and video. A built-in Learning Record Store reports views, completions, scores and individual answers without an external LMS. Teams can co-edit in real time, comment on slides, use @mentions and set viewer, commenter or editor roles for links. Windows and macOS desktop apps support offline projects and local video export. Organizations can self-host the editor and record store with Docker Compose, but must manage backups, TLS, upgrades and uptime, and be familiar with Linux servers. The launch-period plan is free and includes unlimited lessons and listed features and exports; presentations and exports carry a “Made with Mosra” line.