Sunset: Classic/Legacy CRM Cards built with CRM extensions API
Monday, November 9, 2026
What it is
Classic CRM Cards were deprecated starting June 16, 2025 and fully sunset Oct 31, 2026. New Marketplace apps can't include them, they can't be added to the UI, and existing apps had until Oct 31, 2026 to move to React-based App Cards.
Why it matters
Classic cards are static, sidebar-only and support only a few objects. App Cards are interactive, work on more CRM objects and are the supported way forward.
The Take
Kick the tires. See what you can build. Ask Breeze for help. Ask Claude for help.
Per the release text, classic CRM cards built with the CRM extensions API are sunset. Deprecation began June 16, 2025, and the full retirement date was October 31, 2026. New marketplace apps could not include classic cards from June, and existing marketplace apps had until October to move to app cards, which are built with React on the UI extension capabilities. The status is Sunset, and the audience is everyone using Classic CRM Cards.
Casey framed it first, and she is right: this has already happened. If you did not notice it in the last week, it probably does not affect you. This is a marketplace-developer change. The only thing most operators may have seen is a change in the cards inside apps they use.
Here is what I wanted to add. Classic cards are an app-developer concern, but the tools for customizing HubSpot are more accessible now, both from Claude and from working inside Breeze, whether you are building for your company, for a team, or for one user. So this sunset is aimed at app developers, but the point underneath it is one the whole Hubsessed, Orange Morning and Value First crowd has been making for two years: you can be an app developer too, just for your own internal use. The app cards and the React cards, plus the additional betas, are where HubSpot is pointing. Kick the tires on them.
What to do: if you do not build apps, skip this knowingly. If a card inside an app you use looks different than it did, this is why. If you have ever wanted something custom on a record, this is a good week to build one app card for yourself and ask Breeze or Claude to help you get there.
Watch Us Discuss This
The full segment from the show, us working through this update start to finish.
FAQ
What shipped?
Per the release text, a sunset of classic CRM cards built with the CRM extensions API. Deprecation began June 16, 2025, and the full sunset date was October 31, 2026.
Does this affect my portal?
Probably not. Casey said on air that it already happened, so if you have not noticed it in the last week it likely does not affect you. It is mainly a concern for marketplace app developers; you may have seen the cards change inside apps you use.
What replaces classic cards?
Per the release text, interactive app cards built with React and powered by new UI extension capabilities, which offer more dynamic interactions, support across more CRM objects, and more flexibility.
Should I build app cards if I am not a marketplace developer?
Oakes thinks it is worth a look. His point: you can be an app developer too, for your own internal use, for yourself, your team or your org. He suggested trying the app cards and React cards and asking Breeze or Claude for help.
Produced by Value-First Media