Best benefits ever! The company pays for everything the premium and then fully funds HSA to IRS limit. Also dental and vision and life insurance. there is 401k but no match
401K and HSA contributions, unlimited PTO (the company policy is "take time off"), pretty good insurance coverage. Some days of the week there are catered lunches. Company drinking policy is very liberal, which may or may not be a perk to some people. Transit costs are reimbursed.
Solid perks - free lunches, endless snacks. Flexible leave, reimbursement on work related things, etc.
It's a comprehensive package that is almost completely covered by the company.