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docker-gen vs confd: catalog facts
docker-gen	confd
Best for: Generating configuration files from Docker container metadata	Best for: Operators managing application configuration across hosts
Free The MIT-licensed software is available at no cost.	Free Free and open source under the MIT license.
Windows, macOS, Linux, Command line	Command line
Renders templates from Docker container metadata Can watch container changes and regenerate outputs All 3 strengths for docker-gen Renders templates from Docker container metadata Can watch container changes and regenerate outputs Can notify or signal services after regeneration	Renders local configuration files from templates Supports several data backends and environment variables All 3 strengths for confd Renders local configuration files from templates Supports several data backends and environment variables Can reload applications after configuration changes
Limitations not stated	Some removed template functions are unavailable in current versions
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for docker-gen github.com/nginx-proxy/docker-gen/releases/tag/0.17.2 github.com/nginx-proxy/docker-gen/blob/main/README.md github.com/nginx-proxy/docker-gen/blob/main/LICENSE Catalog checked October 6, 2026	Official website Full listing and sources Sources for confd github.com/kelseyhightower/confd Catalog checked October 8, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.