There are a ton of opportunities in the world of tech.
But not all tech companies are created equal when it comes to retaining top talent.
Job site Paysa recently released a report breaking down which tech companies were able to recruit and retain the best employees from April 2016 to April 2017 – and which struggled to keep the best employees on board.
Paysa tracks employee movements with its CompanyRank machine learning technology, which analyzes nearly 7.45 million points of data including résumés, job postings, and social activity across the past 15 years from 198,000 companies.
An employer's CompanyRank score improves whenever someone joins the company from another top-ranked company and declines as employees leave and the company repopulates with talent from lower-ranked companies.
Here are the 25 companies that saw their rankings slide the most drastically this year:
24. Twitter
Founded in 2006, Twitter is a social networking platform.
2017 ranking: 34
Percentage decrease since last year: 36%
23. Veritas Technologies
Veritas is a data management company that was founded as Tolerant Systems in 1983 and rebranded in 2016.
2017 ranking: 43
Percentage decrease since last year: 38%
22. Palo Alto Networks
Founded in 2005, Palo Alto Networks is a network security company
2017 ranking: 17
Percentage decrease since last year: 42%
21. New Relic
Founded in 2008, New Relic is a software analytics company.
2017 ranking: 138
Percentage decrease since last year: 44%
20. PayPal
PayPal is an online payments system that was founded in 1998.
2017 ranking: 85
Percentage decrease since last year: 44%
19. Bloomberg LP
Bloomberg is a financial and media company that was founded in 1981.
2017 ranking: 88
Percentage decrease since last year: 44%
18. Square
Square is a financial services company that was founded in 2009.
2017 ranking: 16
Percentage decrease since last year: 47%
17. Qualcomm
Founded in 1985, Qualcomm is a telecommunications company.
2017 ranking: 94
Percentage decrease since last year: 47%
16. Google
Founded in 1998, Google is a technology company.
2017 ranking: 3
Percentage decrease since last year: 50%
15. Optum
Optum is a business that operates through UnitedHealth Group, which was founded in 1977.
2017 ranking: 132
Percentage decrease since last year: 54%
14. Here
Here is a data mapping company that was founded in 1985.
2017 ranking: 66
Percentage decrease since last year: 54%
13. Expedia
Founded in 2001, Expedia is a travel website.
2017 ranking: 80
Percentage decrease since last year: 60%
12. Slalom Consulting
Slalom Consulting is technology consulting firm that was founded in 2001.
2017 ranking: 74
Percentage decrease since last year: 61%
11. Intel Corporation
Founded in 1968, Intel is a technology company.
2017 ranking: 108
Percentage decrease since last year: 66%
10. Epsilon
Epsilon is a branch of marketing service company Alliance Data Systems Corporation, which was founded in 1996
2017 ranking: 141
Percentage decrease since last year: 72%
9. FireEye
Credit Karma is a financial management platform and was founded in 2007.
2017 ranking: 38
Percentage decrease since last year: 73%
8. Wealthfront
Founded in 2008, Wealthfront is an automated investment service.
2017 ranking: 122
Percentage decrease since last year: 77%
7. GoPro
Founded in 2002, GoPro is a tech company that focuses on action cameras.
2017 ranking: 84
Percentage decrease since last year: 79%
6. Dropbox
Dropbox is a file hosting service that was founded in 2007.
2017 ranking: 13
Percentage decrease since last year: 86%
5. Nest Labs
Nest Labs is a home automation company that was founded in 2010.
2017 ranking: 45
Percentage decrease since last year: 88%
4. Zenefits
Founded in 2013, Zenefits is a cloud-based software company.
2017 ranking: 210
Percentage decrease since last year: 114%
3. SolarCity
SolarCity is a solar energy company that was founded in 2006.
2017 ranking: 188
Percentage decrease since last year: 121%
2. Groupon
Founded in 2008, Groupon is an e-commerce marketplace.
2017 ranking: 143
Percentage decrease since last year: 127%
1. Coursera
Coursera is a education technology company that was founded in 2012.
2017 ranking: 201
Percentage decrease since last year: 175%
