The best alternatives to StreetMix are Banished, Giraffe, and Cities: Skylines. If these 3 options don't work for you, we've listed a few more alternatives below.
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WorkOS— Integrate enterprise features - SSO, SCIM, RBAC, FGA - in minutes
A tool to help urban designers work faster, communicate better and have fun while they do it. Enables the designer to focus on the design, not the admin.