Although these two services were created at almost the exact same time (2017 ish), both services have their own unique set of differences, values, and specializations.
Here are some topical differences:
Market Awareness:
Penji - 66,915 monthly website visitors
Flocksy - 382
Cost:
Penji $499/month
Flocksy - $420/month
Portfolio:
Penji's Portfolio: https://penji.co/our-work/
Competitive Edge:
Flocksy: "Trying to be a full service agency. Jack of all trades, master is unknown."
Penji: Communication between the client and the designer AND focused specialization with graphic design
Penji's dashboard at a glance
Flocksy's dashboard at a glance