Multi-tenancy (multi-tenant SaaS)

One application and one deploy serving many client companies, with each client’s data kept apart.

Clients can share tables with a client column, get a schema each in one database, or a separate database each; AWS calls these pool, bridge and silo, and many products mix them. Shared tables are the cheapest to run because a release is one database update; separate databases suit clients whose contracts require them but multiply updates and backups. Moving from a separate copy per company to one multi-tenant product usually does not require a rewrite.

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Related terms

MVP (minimum viable product): The smallest version of a product that tests whether people want it enough to use or pay.
White-label: A product sold under the buyer’s brand: their logo, colors and domain on software someone else builds and runs.
SLA (service level agreement): A contract that defines availability, response and fix times per priority, and what happens when they are missed.

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