HubSpot

• Excellent salary.
• Extremely dynamic, fast-growing company with a 'start-up' vibe.
• Excellent benefits (excellent stock purchase plan, education allowance, free Kindle books, health insurance, dental plan, free breakfast and lunch, snacks, beer on tap, etc., etc.).
• Lots of passionate, smart people to learn from.
• Excellent platform team / technology stack.
• Everyone is incredibly friendly; people go out of their way to make you feel at home.
• No expense is spared when it comes to.
• Very transparent when it comes to business plans and progress; the management team go out of their way to give you the latest facts and figures from the Exec's.
• Lots of opportunity to advance your career.

I could honestly go on all day about the pros......

They heavily promote from within their own ranks, so there are lots of first-time managers. I don't have any negative experiences to speak of so far, but it's a little risky.

They allow you to run a personality test comparison with any current employee. I find this a little disturbing; people should be able to opt out.

Trying to keep the culture as it is is going to be a challenge as HubSpot scales. I can already see some senior executives trying to instigate change. This is inevitable as HubSpot matures, but it'd be a pity to lose the free beer :)