jSparrow vs Moderne

jSparrow is a Java cleanup and refactoring tool for Eclipse IDE and Maven, running on Linux, macOS and Windows. It lists more than 90 refactorings for Java 1.1 and later, with project-level and batch operation. Diff View compares original and proposed code so changes can be reviewed before application. Markers suggest quick fixes during programming, and the base product includes them at no charge. Interactive rules can replace standard output with logging, rename fields to Java naming conventions and remove unused methods, fields and types. Analysis and refactoring run offline, and the FAQ says code is not sent to external servers or third parties. Internet access is required to persist locked refactorings through the NetLicensing API; offline validation servers are available. The site describes jSparrow as open-source, with no license needed since version 4.20.0. Twenty rules are free; paid licenses are $169 a month or $1,325 a year.

Moderne provides infrastructure for developers and AI coding agents to analyze, modernize, secure, and govern large software systems. Its hybrid SaaS runs deterministic recipes across thousands of repositories in a single-tenant cloud environment chosen by provider and region. Moderne DX instead runs within a customer network without outbound connectivity, keeping source code, recipes, and analysis inside that perimeter. Teams can group repositories by business unit and reporting structure using one CSV file, with results rolling up to leaders. DevCenter tracks upgrade, migration, and vulnerability status, including timelines and remaining occurrences. Its marketplace has thousands of type-aware recipes, and changesets support reviewing diffs, viewing results, and making multi-repository commits or pull requests. Changelog connects to source-control services and internal systems; agents can query change context through MCP and the GraphQL API. The product supports Linux, macOS, Windows, web, API, and self-hosted deployments. Pricing is paid, from $2,000/mo. Listed plans include Member at $2,000 a month, billed monthly or yearly; Commercial at a price agreed with the maker; Steering Committee at a price agreed with the maker; Enterprise at a price agreed with the maker; and Fully Managed Service at a price agreed with the maker. Moderne states it is SOC 2 Type 2 compliant.