I would keep HubSpot when a sales team needs pipeline reporting and access governed by the seat, and I would open the GoHighLevel comparison when the work is client accounts, SMS and funnels in one login.
HubSpot sells a customer platform. Marketing, sales and service sit on one CRM record, and the hubs are priced as seats. Its pricing page opens with a free CRM for up to two users and no card. Paid Starter is a per-seat promo after that, and the Starter page says the bill changes if you add seats, buy an add-on, or pass a marketing-contact tier.
The page that puts this beside GoHighLevel is GoHighLevel vs HubSpot. Read that if you are choosing between them. This review stays on the CRM.
SMS, client sub-accounts and white-label resale are the agency product's pitch, which is why they show up in that comparison rather than as HubSpot features. The vendor pages sell the shared customer record, and the reporting that people who have used both call a better fit for a sales team.