No names, but my company is service companies (mostly residential) - many logos with different verticals (think electric, hvac, etc). Having a SaaS CRM that served all our brands needs was always a challenge and made aggregating anything difficult (we basically were running multiple CRMs)
We were using dozens of SaaS tools per logo - and just going through them all and figuring out what features we need/want and rolling them into the larger system. We've also built handful of things for internal operations, finance, etc