  While Microservices are a preferred choice for modern cloud-based
applications, the migration and architectural refactoring of existing legacy
systems is still a major challenge in industry. To address this, academia has
proposed many strategies and approaches that aim to automate the process of
decomposing a monolith into functional units. In this study, we review existing
migration approaches regarding techniques used and tool support. From 91
publications, we extracted 22 tools, 7 of which address service decomposition.
To assess them from an end-user perspective, we investigated their underlying
techniques, installation, documentation, usability and support. For 5 of them,
we generated service cuts using reference applications. The results of our
preliminary work suggest that the inspected tools pursue promising concepts,
but lack maturity and generalizability for reliable use by industry.
