Accounting for projects and customers for contextual advertising / seo. Which CRM?

Question

CRM

Guys, who keeps track of projects / clients for contextual advertising or seo?
I myself keep everything in Evernote, elementary notes, where I mark information for myself.
Everything suits me, but I would also like to keep mutual settlements, set reminders when who should pay, who should send which report, etc.
I tried Bitrix, but there are no settlements there, I returned back to Evernote.
Plus, in the future, I think you will need access to employees, set tasks for them, monitor their implementation, and maybe give the customer access to some kind of project.
What do you use? Share your experience? Thank you!

Answer 1

https://trello.com/
https://basecamp.com/

Answer 2

I tried a dozen options, settled on https://www.amocrm.ru