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envsubst vs gomplate: catalog facts
envsubst	gomplate
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Single binary with no runtime to install Fills config templates from environment variables	Supports many data sources as template input Hundreds of built-in template functions
Small, narrowly focused tool Infrequent releases	Requires learning Go template syntax
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.