Open-Elevation is a free and open-source alternative to the Google Elevation API and similar offerings.
This service came out of the need to have a hosted, easy to use and easy to setup elevation API. While there are some alternatives out there, none of them work out of the box, and seem to point to dead datasets. Open-Elevation is easy to setup, has its own docker image and provides scripts for you to easily acquire whatever datasets you want. We offer you the whole world with our public API.
The code is fully open-source, licensed under the GPLv2. If you want, submit a pull request!
If you enjoy our service, please consider donating to us. Servers aren't free :)