Series B Biotech companies in San Francisco
Companies applying biology, chemistry, and computation to therapeutics and tooling. Filtered to Series B-stage companies headquartered in San Francisco.
Built from a search like: “Top Series B Biotech companies in San Francisco”
Ranked by current headcount across Series B Biotech companies in San Francisco. Refreshed daily.
- 1Vial· San Francisco, California, United States
- Series B
- 165 employees
- Founded 2020
- 2Stämm· San Francisco, California, United States
- Series B
- 160 employees
- Founded 2016
- 3Kardigan· South San Francisco, California, United States
- Series B
- 152 employees
- Founded 2023
- 4Septerna· South San Francisco, California, United States
- Series B
- 128 employees
- Founded 2022
- 5Frontier Medicines· South San Francisco, California, United States
- Series B
- 76 employees
- Founded 2018
- 6Abdera Therapeutics· South San Francisco, California, United States
- Series B
- 68 employees
- Founded 2021
- 7Cartography Biosciences· South San Francisco, California, United States
- Series B
- 60 employees
- Founded 2020
- 8Character Biosciences· San Francisco, California, United States
- Series B
- 50 employees
- Founded 2019
- 9T-knife Therapeutics· San Francisco, California, United States
- Series B
- 47 employees
- Founded 2018
- 10Epicrispr Biotechnologies· South San Francisco, California, United States
- Series B
- 44 employees
- Founded 2018
- 11Amprion· San Francisco, California, United States
- Series B
- 38 employees
- Founded 2007
- 12Marea Therapeutics· San Francisco, California, United States
- Series B
- 35 employees
- Founded 2022
- 13AltruBio Inc.· San Francisco, California, United States
- Series B
- 29 employees
- Founded 2020
- 14HI-Bio: A Biogen Company· South San Francisco, California, United States
- Series B
- 25 employees
- Founded 2021
- 15Third Harmonic Bio· San Francisco, California, United States
- Series B
- 13 employees
- Founded 2019
- 16Spiral Therapeutics· South San Francisco, California, United States
- Series B
- 11 employees
- Founded 2016
- 17AllStripes (now PicnicHealth)· San Francisco, California, United States
- Series B
- 8 employees
- Founded 2017
- 18Miroculus· San Francisco, California, United States
- Series B
- 8 employees
- Founded 2014
- 19ESCAPE Bio· South San Francisco, California, United States
- Series B
- 6 employees
- Founded 2015
- 20IgGenix, Inc· South San Francisco, California, United States
- Series B
- 6 employees
- Founded 2019
- 213Scan· San Francisco, California, United States
- Series B
- 4 employees
- Founded 2011
Find engineers at Series B Biotech companies in San Francisco
Searching for “engineers at top Series B Biotech companies in San Francisco” surfaces this slice of the market. The list above ranks Biotech companies headquartered in San Francisco whose latest disclosed round is Series B, by current headcount, drawn from public LinkedIn and Crunchbase records. With 21 matching companies in our index, this is a tight read on where the Biotech talent in San Francisco is heating up.
Three filters at once narrows the field hard. The companies that survive all three — Series B, Biotech, in San Francisco — are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Biotech’s next operators and angel investors.
Refolk converts this list into a live search. Ask for “senior engineers at Series B Biotech companies in San Francisco hiring” or “founders of Series B Biotech companies in San Francisco who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.
How this list is built
Last refreshed: Thu, 07 May 2026 08:09:50 GMT
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