Leases - Summary of Weighted Average Remaining Lease Terms and Weighted Average Discount Rate for Operating and Finance Leases (Detail)	12 Months Ended
Dec. 31, 2021
Leases [Abstract]
Weighted-average remaining lease term:	9 years 7 months 6 days
Weighted-average discount rate:	4.50%

Operating and finance lease weighted average discount rate percent.

No definition available.

Name:	hubs_OperatingAndFinanceLeaseWeightedAverageDiscountRatePercent
Namespace Prefix:	hubs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant