# Rails Multi-Tenancy

DevFeed: [Rails Multi-Tenancy](<https://devfeed.tech/articles/rails-multi-tenancy-33513.md>)

Original publisher: [Read original article](<https://dev.37signals.com/rails-multi-tenancy/>)

Author: Mike Dalessio, Kimberly Rhodes, Fernando Olivares

Published: 2026-02-13T18:00:00Z

Content type: article

Language: en

Sources: [37signals Dev](<https://devfeed.tech/sources/37signals-dev.md>)

Topics: [Multi-tenancy](<https://devfeed.tech/topics/multi-tenancy.md>), [Rails](<https://devfeed.tech/topics/rails.md>), [SQLite](<https://devfeed.tech/topics/sqlite.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [MySQL](<https://devfeed.tech/topics/mysql.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Replication](<https://devfeed.tech/topics/replication.md>)

Tags: [active-record](<https://devfeed.tech/tags/active-record.md>), [databases](<https://devfeed.tech/tags/databases.md>), [demo](<https://devfeed.tech/tags/demo.md>), [developer](<https://devfeed.tech/tags/developer.md>), [multi-tenancy](<https://devfeed.tech/tags/multi-tenancy.md>), [mysql](<https://devfeed.tech/tags/mysql.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [rails](<https://devfeed.tech/tags/rails.md>), [replication](<https://devfeed.tech/tags/replication.md>), [sqlite](<https://devfeed.tech/tags/sqlite.md>)

## AI overview

Lead Programmer Mike Dalessio discusses multi-tenancy in Rails, including 37signals' work moving Fizzy toward separate customer databases, the Active Record Tenanted gem, safeguards against accidental data leaks, and challenges involving SQLite replication and failover.

## Source excerpt

Lead Programmer Mike Dalessio shares the benefits of multi-tenant databases and how his work with Fizzy led to the the Active Record Tenanted gem.