It is a big company, and if you are in an international office then you could feel disconnected from HQ in Cambridge. HubSpot is also always changing, which I like, but I know constant change is not for everyone. There is also a big push for greater diversity, but the company is still not very diverse. I know it is a priority for the leadership team, but the lack of diversity is a con.
Another con is compensation - salary is less than competitors.