TL;DR: Install HubSpot Integration Plus from the monday.com Marketplace and add it to your first board. Then connect your HubSpot account from the HubSpot 2-way Sync view on that board. Takes about 5 minutes.
Before You Start
You need to be a monday.com admin or have app-install permissions. Members and guests can't install Marketplace apps.
Have a board ready where you want to use HubSpot sync — you'll add the app to one during install. Board Setup Best Practices
Search for HubSpot Integration Plus and select it.
Click Install app.
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Add the app to your first board
After clicking Install, you'll see a "Let's get started" screen. Use Choose a workspace and Choose a board to pick an existing board. Make sure it has the right columns first. See Board Setup Best Practices. You can always add the app to more boards later.
Click Add app to continue.
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Connect your HubSpot account
After clicking Add app, the app opens as a HubSpot 2-way Sync view tab on your board. This is where you connect HubSpot and set up your sync. For a deeper look at permissions and troubleshooting, see Connect your HubSpot account.
In the HubSpot 2-way Sync view, click Connect to HubSpot.
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HubSpot opens a new tab. Under Choose an account, pick your account and click Choose Account.
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Back in monday.com, HubSpot shows Connected. Click Continue to setup, choose a HubSpot portal (or Add another portal) and click Next.
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Verify it installed
Open the board you added the app to.
Your board now has a HubSpot 2-way Sync view tab. If it doesn't appear, refresh the page. It can take a few seconds after install.
If you didn't complete setup
If you closed the install flow before adding the app to a board:
Click the puzzle icon in the top-right corner, then Manage.
Find HubSpot Integration Plus and click Use app.
Choose a workspace and a board, then click Add app.
If the app still doesn't appear correctly, uninstall and reinstall it. Reinstalling deletes all your sync configurations, so you'll need to set them up again.
Next up
You're installed — now set up your first sync between monday.com and HubSpot.