Series A Biotech companies in Boston
Companies applying biology, chemistry, and computation to therapeutics and tooling. Filtered to Series A-stage companies headquartered in Boston.
- StageSeries A
- IndustryBiotech
- HQBoston
- Matches31
Built from a search like: “Top Series A Biotech companies in Boston”
Ranked by current headcount across Series A Biotech companies in Boston. Refreshed daily.
- 1Soufflé Therapeutics· Boston, Massachusetts, United States
- Series A
- 80 employees
- Founded 2021
- 2Kelonia Therapeutics· Boston, Massachusetts, United States
- Series A
- 66 employees
- Founded 2017
- 3Manifold Bio· Boston, Massachusetts, United States
- Series A
- 65 employees
- Founded 2020
- 4Protein Metrics, LLC· Boston, Massachusetts, United States
- Series A
- 58 employees
- Founded 2011
- 5PhaseV· Boston, Massachusetts, United States
- Series A
- 53 employees
- Founded 2023
- 6Ascidian Therapeutics· Boston, Massachusetts, United States
- Series A
- 48 employees
- Founded 2020
- 7Spear Bio· Boston, Massachusetts, United States
- Series A
- 48 employees
- Founded 2021
- 8Delve Bio· Boston, Massachusetts, United States
- Series A
- 44 employees
- Founded 2022
- 9ArkeaBioTM· Boston, Massachusetts, United States
- Series A
- 40 employees
- Founded 2021
- 10Magnet Biomedicine· Boston, Massachusetts, United States
- Series A
- 39 employees
- Founded 2019
- 11AI Proteins· Boston, Massachusetts, United States
- Series A
- 38 employees
- Founded 2021
- 12Genialis· Boston, Massachusetts, United States
- Series A
- 33 employees
- Founded 2015
- 13DeepCure· Boston, Massachusetts, United States
- Series A
- 31 employees
- Founded 2018
- 14Sensorium Therapeutics· Boston, Massachusetts, United States
- Series A
- 26 employees
- Founded 2021
- 15Axonis Therapeutics· Boston, Massachusetts, United States
- Series A
- 25 employees
- Founded 2019
- 16Newleos Therapeutics· Boston, Massachusetts, United States
- Series A
- 25 employees
- Founded 2024
- 17Syntis Bio· Boston, Massachusetts, United States
- Series A
- 24 employees
- Founded 2022
- 18Xellar Biosystems· Boston, Massachusetts, United States
- Series A
- 22 employees
- Founded 2022
- 19Hillstar Bio· Boston, Massachusetts, United States
- Series A
- 19 employees
- Founded 2023
- 20Rectify Pharma· Boston, Massachusetts, United States
- Series A
- 18 employees
- Founded 2020
- 21Bambusa Therapeutics· Boston, Massachusetts, United States
- Series A
- 18 employees
- Founded 2024
- 22Carbon Biosciences· Boston, Massachusetts, United States
- Series A
- 16 employees
- Founded 2021
- 23NextRNA Therapeutics· Boston, Massachusetts, United States
- Series A
- 11 employees
- Founded 2020
- 24Poplar Therapeutics· Boston, Massachusetts, United States
- Series A
- 11 employees
- Founded 2024
- 25Catamaran Bio· Boston, Massachusetts, United States
- Series A
- 10 employees
- Founded 2020
Find engineers at Series A Biotech companies in Boston
Searching for “engineers at top Series A Biotech companies in Boston” surfaces this slice of the market. The list above ranks Biotech companies headquartered in Boston whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 31 matching companies in our index, this is a tight read on where the Biotech talent in Boston is heating up.
Three filters at once narrows the field hard. The companies that survive all three — Series A, Biotech, in Boston — 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 A Biotech companies in Boston hiring” or “founders of Series A Biotech companies in Boston 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 08:10:06 GMT
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