Fall 2026 Spotlight - Developer and Builder Updates
HubSpot's Fall 2026 release introduces new features on Developer Platform 2026.09, including updated APIs, new beta APIs, and AI builder tools. This changelog covers non-breaking updates; see the separate breaking changes article for legacy API deprecations.
This changelog rounds up the developer and builder updates in HubSpot's Fall Spotlight 2026 release: what's now generally available on Developer Platform version 2026.09, the new and updated APIs, the APIs entering public beta, and the latest AI builder tools. To learn more about what was announced during UNBOUND, visit the general Spotlight page and the developer Spotlight page.
This rollup covers non-breaking updates only. For the breaking changes in this release, including legacy API versions and legacy apps moving to unsupported status, see Breaking Change: Legacy APIs and Legacy Apps Are Going Unsupported.
Source: original entry ↗