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:
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%