Terraform is the most popular infrastructure-as-code framework. I wasn’t able to find a good source of information on Terraform’s market share. The closest source is a report from 6Sense that says Terraform has 37% of the market. This market share doesn’t include OpenTofu, which is a fork of Terraform. It also compares Terraform to Ansible (30%), which is a bit of a weird comparison. Anyway, Terraform has a majority of the IaC market. In most of the cloud projects you are currently working on, there will be Terraform one way or another.