Custom CRM extensions & UI cards
Build custom UI inside HubSpot — CRM cards, sidebar apps and actions that surface the right data and tools where your team works.
CRM Extensions
Implementation plan
Custom CRM cards and record sidebars
DoneUI extensions (React) on the developer platform
DoneCustom actions and buttons inside records
DoneExternal data surfaced in the CRM
LivePrivate apps and OAuth integration
QueuedWhat you get
Your team shouldn't have to leave the record to get their job done. We build custom CRM extensions — UI cards, sidebar apps and custom actions powered by HubSpot's UI extensions and developer platform — that surface external data, internal tools and tailored workflows right inside the contact, company or deal record.
Talk to salesWhat's included
- Custom CRM cards and record sidebars
- UI extensions (React) on the developer platform
- Custom actions and buttons inside records
- External data surfaced in the CRM
- Private apps and OAuth integration
- Testing, deployment and documentation
A clear, repeatable process
Scope
We define what data and actions your team needs on the record and where.
Build
We develop the UI extensions, cards and private app on HubSpot's developer platform.
Test & deploy
We test in your account, validate against your APIs, and deploy.
Maintain
We document the extension and can maintain it as your needs evolve.
What changes for you
Your tools and data inside the CRM
Less app-switching for your team
A CRM tailored to how you actually work
Frequently asked questions
What are HubSpot CRM extensions?
CRM extensions are custom interfaces built inside HubSpot records — cards, sidebars, buttons and apps — using HubSpot's UI extensions and developer platform, so your team can see external data and run tailored actions without leaving the contact, company or deal.
What can you build with UI extensions?
Custom CRM cards that display external or computed data, interactive React components, custom actions and buttons, and private apps that connect HubSpot to your other systems — all surfaced directly on the record.
Which HubSpot tier do I need?
UI extensions are built with HubSpot's developer projects and are available on Enterprise tiers. We confirm your subscription and developer setup before building.
Can you surface external data in the CRM?
Yes. We build cards that pull data from your other systems — billing, support, internal tools — via their APIs and display it live on the HubSpot record, so reps and agents have full context in one place.
How are extensions built and deployed?
We build them as React-based UI extensions on HubSpot's developer platform within a private app, test them in your account, and deploy them with documentation so they're maintainable.
Related Technical Services
Integrations
Connect HubSpot to the rest of your stack — ERPs, billing, data warehouses and internal systems — with reliable, maintainable integrations.
Programmable Automation
Go beyond standard workflows — custom-coded automation that handles the logic HubSpot's no-code tools can't.
HubSpot Development
Custom themes, modules, templates and portals on HubSpot's CMS — built to your design and connected to your CRM.
Ready to get started with CRM Extensions?
Talk to sales and we'll scope it against your HubSpot setup — fixed monthly pricing, cancel anytime.