A composable martech stack connects apps and agents around common data and definitions rather than a fixed product bundle. Chiefmartec's 2026 analysis presents this as an emerging direction.
In the demo, one upper module changes while the shared data layer and other connections remain. Actual replaceability depends on interfaces and data movement.
More modules are not a goal by themselves. Compare integration cost, security, and failure ownership across the whole system.
When to use
Use it when extending or replacing a stack to examine coupling between data and apps.