The exploration of multi-tenant architectures in Postgres and Neon outlines three primary approaches: shared schema, schema-per-user, and database-per-user. Each has its pros and cons, with database-per-user offering complete data isolation, making it appealing for industries requiring stringent data privacy, despite its historically high costs and complexity. Neon’s serverless design and features address some challenges of database-per-user architectures, offering a more scalable and manageable solution. Isolated application environments provide flexibility but are costly, while shared environments simplify operations but risk compromising data isolation. The series will delve into control planes essential for scaling multi-tenant applications effectively, emphasizing Neon’s role in enhancing these systems.