1. health insurance
2. stock options
3. so-called "employer's contribution" to social security
4. 401k employer match contributions
5. sick leave
6. vacation
7. maternity/paternity leave
8. stock purchase plan
9. unemployment insurance taxes
10. 2 weeks severance pay
11. holiday pay
12. various legal rights contractors don't have
13. employer provided equipment that a contractor would be expected to provide
Here's the first hit on google:
https://www.bankrate.com/finance/financial-literacy/the-valu...