Glassdoor’s 13th annual Best Places to Work list is a ranking of 100 companies based on employee feedback over a 12-month period. Companies on the list are defined as those that have at least 1,000 employees, and there is also a separate list for smaller ones. (The full methodology, like the metrics used, can be found on Glassdoor.)

Andrew Chamberlain, chief economist at Glassdoor, told Insider that some of the companies that made the list this year “were on the frontlines of the fight against COVID.” Additionally, Chamberlain notes that companies that were highly ranked this year not only did well on the three main factors Glassdoor usually sees in these companies—being a mission-driven company with great senior leadership and career development opportunities—but also made employee health and safety a main priority.

Here are the leading technology companies that cracked Glassdoor’s top 15 Best Places to Work.

7. DocuSign 

 - Docusign
Docusign

Glassdoor ‘Best Places to Work 2021’ ranking: 15

Overall company rating: 4.4.

Headquarters: San Francisco, California

Industry: Computer hardware and software

6. LinkedIn 

 - Smith Collection/Gado/Getty Images
Smith Collection/Gado/Getty Images

Glassdoor ‘Best Places to Work 2021’ ranking: 13

Overall company rating: 4.4.

Headquarters: Sunnyvale, California

Industry: Internet

5. Facebook

 - JOSH EDELSON/AFP/Getty Images
JOSH EDELSON/AFP/Getty Images

Glassdoor ‘Best Places to Work 2021’ ranking: 11

Overall company rating: 4.4.

Headquarters: Menlo Park, California

Industry: Internet

4. Microsoft 

 - Bryan Thomas/Getty Images
Bryan Thomas/Getty Images

Glassdoor ‘Best Places to Work 2021’ ranking: 9

Overall company rating: 4.5

Headquarters: Redmond, Washington

Industry: Computer hardware and software

3. Google 

 - Justin Sullivan/Getty Images
Justin Sullivan/Getty Images

Glassdoor ‘Best Places to Work 2021’ ranking: 6

Overall company rating: 4.5

Headquarters: Mountain View, California

Industry: Internet

2. HubSpot 

 - Boston Globe/Getty Images
Boston Globe/Getty Images

Glassdoor ‘Best Places to Work 2021’ ranking: 4

Overall company rating: 4.5

Headquarters: Cambridge, Massachusetts

Industry: Computer hardware and software

1. Nvidia

 - Reuters
Reuters

Glassdoor ‘Best Places to Work 2021’ ranking: 2

Overall company rating: 4.5

Headquarters: Santa Clara, California

Industry: Computer hardware and software