Top Series B companies in the United States
Companies that have closed a Series B — proven scaling motion, hiring aggressively. Filtered to companies headquartered in the United States.
- StageSeries B
- HQthe United States
- Matches3,619
Built from a search like: “Top Series B companies in the United States”
Ranked by current headcount across Series B companies headquartered in the United States. Refreshed daily.
- 1Outlier· San Francisco, California, United States
- Series B
- 27.7k employees
- Founded 2023
- 2Fortinet· Sunnyvale, California, United States
- Series B
- 16k employees
- Founded 2014
- 3Railway· San Francisco, California, United States
- Series B
- 10.7k employees
- Founded 2020
- 4Cloud Software Group· Fort Lauderdale, Florida, United States
- Series B
- 9.5k employees
- Founded 2008
- 5Chief· New York, New York, United States
- Series B
- 8k employees
- Founded 2019
- 6Datavant· Phoenix, Arizona, United States
- Series B
- 7.1k employees
- Founded 2017
- 7Shipt· Birmingham, Alabama, United States
- Series B
- 6.5k employees
- Founded 2014
- 8Driver· San Francisco, California, United States
- Series B
- 6.2k employees
- Founded 2015
- 9GitHub· San Francisco, California, United States
- Series B
- 6k employees
- Founded 2008
- 10Sama· San Francisco, California, United States
- Series B
- 4.3k employees
- Founded 2008
- 11Extreme Networks· Morrisville, North Carolina, United States
- Series B
- 4k employees
- Founded 1996
- 12Tredence Inc.· San Jose, California, United States
- Series B
- 4k employees
- Founded 2013
- 13Nourish· New York City Metropolitan Area
- Series B
- 3k employees
- Founded 2021
- 14SchooLinks· Austin, Texas, United States
- Series B
- 2.9k employees
- Founded 2014
- 15Numerator· Chicago, Illinois, United States
- Series B
- 2.7k employees
- Founded 1990
- 16Home Chef· Chicago, Illinois, United States
- Series B
- 2.7k employees
- Founded 2013
- 17NETSCOUT· Westford, Massachusetts, United States
- Series B
- 2.7k employees
- Founded 1984
- 18Tutor.com· New York, New York, United States
- Series B
- 2.6k employees
- Founded 2000
- 19Login· Tucson, Arizona, United States
- Series B
- 2.6k employees
- Founded 2001
- 20Proprio· Seattle, Washington, United States
- Series B
- 2.6k employees
- Founded 2016
- 21Atlas HXM· Chicago, Illinois, United States
- Series B
- 2.2k employees
- Founded 2015
- 22Logoworks· New Bern, North Carolina, United States
- Series B
- 2.1k employees
- Founded 2001
- 23Shiftsmart· New York, New York, United States
- Series B
- 1.9k employees
- Founded 2015
- 24Priceline· Norwalk, Connecticut, United States
- Series B
- 1.8k employees
- Founded 1998
- 25DataCamp· New York, New York, United States
- Series B
- 1.8k employees
- Founded 2014
Find engineers at Series B companies in the United States
Series B companies in the United States are some of the fastest-moving employers in the market. The list above ranks the largest Series B-stage companies headquartered in the United States by current headcount, drawn from public LinkedIn and Crunchbase records. With 3,619 matching companies in our index, the density of senior engineers, designers, and founders is unusually high.
At Series B, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the the United Statestalent market is heating up — and for which engineers and founders are about to become tomorrow’s operators.
Refolk converts this list into a live search. Ask for “founders of Series B companies in the United States” or “senior engineers at Series B companies in the United States hiring” and Refolk returns a ranked shortlist with evidence behind each match.
How this list is built
Last refreshed: Thu, 07 May 2026 07:57:29 GMT
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