[OmarIsmail]

"In-house tools", do you mean something built in house?

If you're spending 100K in integrations you think building an entire service, or suite of services is going to be LESS than that? Now take into consideration opportunity costs. This is insane.

I'll be generous though and believe that you're talking about using open source solutions. That's a more viable option, but you still have to do integrations so the cost is effectively the same, probably more because Open Source solutions are typically far less polished.

And even Open Source projects change dramatically over their life. Everything changes. That's technology. Better to get better at dealing with change than try and hold the world still.