Ginzametrics (YC S10) SEO API v1.1 with Agency Automation Features
ginzametrics.com
ginzametrics.com
I get this but I don't see it always being true when you look at Ginza's pricing. The Agency plan is $599 and that only includes 20 sites.
If in-house programmers can build their own tools one-time, it might be cheaper in the long run than paying $7,200+ a year.
The truth is that, like any app, it requires ongoing maintenance, new features, monthly server costs, etc. For most of the companies I work with, they are glad to let someone else focus on building the infrastructure.
Your system has more features (funnel, more keywords) but the price jump for me at least would be the issue.