The main content of Free version of PlayFab:
First of all, we can satisfy the amount of your title players. Since you have no more than 100 players, 10k total minutes of PlayFab Party Connectivity and Voice are enough. Then, if your server program functions are basic, you can use a single core VM ,750 free compute hours are enough.
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Unreal Engine or Unity? Which is the top-of-the-pile solution in the PlayFab universe?
UE4 Dedicated Server running on docker container exits with code 1
How to make dedicated server fo multiplayer game
Playfab possibilities to develop turned-based multiplayer games with
Unreal: Can't see other players after logging In.,Can't see other players after logging in.