Today is a big day for OpenTofu! After four months of work, we're releasing the first stable release of OpenTofu, a community-driven open source fork of Terraform. OpenTofu, a Linux Foundation project, is now production-ready. It’s a drop-in replacement for Terraform, and you can easily migrate to i...
In their opening paragraph they compare themselves to Terraform twice with explaining themselves once.
At least their docs do better:
OpenTofu is an infrastructure as code tool that lets you define both cloud and on-prem resources in human-readable configuration files that you can version, reuse, and share.
Most people know of Terraform but not so much what it is. In my experience this includes a surprising number of people whose job it is to maintain templates.