Client reporting for marketing agency

Hi guys, I'd like to ask agency owners, how you are doing client reporting and the time you're putting in it, and the issues you face. I've helped numerous marketing agencies set up their own client reporting system using several free technologies so there is way less monthly fee compared to what agency pays to platforms like agency analytics or any other reporting tool built for marketing agencies. The benefit of having you own client reporting system is- 1. Saves a lot of time 2. No error if compared to manual reporting 3. No manual intervention 4. Cost effective In the last week I delivered a solution to a marketing agency which helped them save 20 hours a week. If anyone of you is interested in knowing more about it, let me know. I'll help as much as I can.