The latter, our company is replacing tools we used to pay for with bespoke software.
Another interesting one is the hosting of the open source equivalents of SaaS products on on-prem hardware. Turns out that agents take very well to infrastructure-as-code setups, making managing deployments of software far less work than it used to be. So we can use X database (albeit an older and less feature-rich version) on our own infrastructure that we can easily scale/tailor to our needs without paying for the enterprise SaaS version
Another interesting one is the hosting of the open source equivalents of SaaS products on on-prem hardware. Turns out that agents take very well to infrastructure-as-code setups, making managing deployments of software far less work than it used to be. So we can use X database (albeit an older and less feature-rich version) on our own infrastructure that we can easily scale/tailor to our needs without paying for the enterprise SaaS version