Top Series B companies in San Francisco

Companies that have closed a Series B — proven scaling motion, hiring aggressively. Filtered to companies headquartered in San Francisco.

Built from a search like: “Top Series B companies in San Francisco”

Ranked by current headcount across Series B companies headquartered in San Francisco. Refreshed daily.

1
Outlier· San Francisco, California, United States
- Series B
- 27.7k employees
- Founded 2023
2
Railway· San Francisco, California, United States
- Series B
- 10.7k employees
- Founded 2020
3
Driver· San Francisco, California, United States
- Series B
- 6.2k employees
- Founded 2015
4
GitHub· San Francisco, California, United States
- Series B
- 6k employees
- Founded 2008
5
Sama· San Francisco, California, United States
- Series B
- 4.3k employees
- Founded 2008
6
Eco· San Francisco, California, United States
- Series B
- 1.4k employees
- Founded 2018
7
Forage· San Francisco, California, United States
- Series B
- 1.3k employees
- Founded 2017
8
Constructor· San Francisco, California, United States
- Series B
- 1.3k employees
- Founded 2015
9
Factory· San Francisco, California, United States
- Series B
- 1.1k employees
- Founded 2023
10
Courier· San Francisco, California, United States
- Series B
- 1.1k employees
- Founded 2019
11
Robosoft Technologies· San Francisco, California, United States
- Series B
- 1.1k employees
- Founded 1996
12
Fast· San Francisco, California, United States
- Series B
- 1k employees
- Founded 2019
13
Cherry· San Francisco, California, United States
- Series B
- 757 employees
- Founded 2019
14
Ignite Reading· San Francisco, California, United States
- Series B
- 669 employees
- Founded 2020
15
Incode· San Francisco, California, United States
- Series B
- 628 employees
- Founded 2015
16
BookNook 📚· San Francisco, California, United States
- Series B
- 586 employees
- Founded 2016
17
11x· San Francisco, California, United States
- Series B
- 558 employees
- Founded 2023
18
Cobalt· San Francisco, California, United States
- Series B
- 534 employees
- Founded 2013
19
AngelList· San Francisco, California, United States
- Series B
- 528 employees
- Founded 2010
20
Anyplace· San Francisco, California, United States
- Series B
- 525 employees
- Founded 2015
21
Platzi· San Francisco, California, United States
- Series B
- 512 employees
- Founded 2012
22
Joy· San Francisco, California, United States
- Series B
- 483 employees
- Founded 2016
23
Fay Nutrition· San Francisco, California, United States
- Series B
- 463 employees
- Founded 2022
24
Nuna Inc.· San Francisco, California, United States
- Series B
- 462 employees
- Founded 2010
25
HubPages· San Francisco, California, United States
- Series B
- 450 employees
- Founded 2006

Find engineers at Series B companies in San Francisco

Series B companies in San Francisco are some of the fastest-moving employers in the market. The list above ranks the largest Series B-stage companies headquartered in San Francisco by current headcount, drawn from public LinkedIn and Crunchbase records. With 477 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 San Franciscotalent 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 San Francisco” or “senior engineers at Series B companies in San Francisco hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Series B companies headquartered in San Francisco from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 06:09:21 GMT

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