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Quantum-Si logo — The Protein Sequencing Company™

Quantum-Si

The Protein Sequencing Company™

Founded 2013 United States Branford, United States 186 employees IPO Total: $215.00M Biotechnology, Health Care +2

General Information

Company Name Quantum-Si
Founded Year 2013
Location United States Branford, United States
Employees 186
Industries Biotechnology, Health Care, Life Sciences +1
Funding Stage IPO
Business Model B2B, Platform
Revenue Model Product Sales, Service Fee, Subscription
Social

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About Quantum-Si

Quantum-Si, known as The Protein Sequencing Company™, is revolutionizing the field of proteomics by offering a benchtop platform for single-molecule protein analysis. Founded in 2013, the United States-based company empowers researchers to bypass traditional, cumbersome workflows and directly obtain dynamic and functional protein insights with unmatched precision.

The platform developed by Quantum-Si facilitates real-time, kinetic-based detection, making protein analysis not only simpler and faster but also more informative. This technology is poised to significantly accelerate proteomic discoveries, with broad implications for the fields of Biotechnology, Health Care, Life Sciences, and Pharmaceutical research.

Publicly traded on Nasdaq under the ticker $QSI, the company secured a significant $50.00M Post IPO Equity investment as of July 2025, demonstrating robust investor confidence in its innovative approach and market potential.

Taxonomy: Proteomics, Protein Sequencing, Single-Molecule Analysis, Kinetic-Based Detection, Benchtop Platform, Drug Discovery, Diagnostics, Functional Protein Insights, Semiconductor Chip Technology, Next-Generation Sequencing, Genomics, Digitized Proteomic Research, Real-Time Analysis, Lab Equipment, Biotechnology Innovation

Services & Products

Single-molecule Protein Sequencing
Protein Barcoding
Antibody Sequencing and Characterization
Protein Variant Analysis
PTM (Post-translational Modification) Analysis

Target Customers

Research Laboratories Biotechnology Companies Pharmaceutical Companies Academic Institutions Clinical Proteomics Researchers

Funding Rounds & Investors (5)

View All
Funding Stage Amount Investors Lead Investors Date
Post-IPO Equity $50.00M -
01 Jul 2025
Post-IPO Equity $50.00M -
01 Dec 2024
IPO Undisclosed -
01 Jun 2021
Spac Private Placement $115.00M 4
Redmile Group Ark Invest Eldridge Industries
Redmile Group, Ark Invest +2
01 Feb 2021
Seed Undisclosed -
01 Jan 2015

Quantum-Si Alternatives & Competitors

Quantum-Si vs
Rapid Novor
Rapid Novor Canada

Decode the immune system by sequencing and quantifying antibody proteins. REmAb®, REpAb®, NovorIg™,...

Series A
56 employees
Biotechnology, Health Care
Quantum-Si vs
Sarmal, Inc.
Sarmal, Inc.

A genomics company developing next generation innovations in sequencing and advanced target sequence...

5 employees
Digital Health, Health Care
Quantum-Si vs
PROTEINA
PROTEINA Korea South

Our Protein-protein interaction (PPI) analysis platform enables quantitative measurements at the sin...

Series C
32 employees
Biotechnology, Health Care
Compare Quantum-Si vs PROTEINA

FAQ About Quantum-Si

The Protein Sequencing Company™
Quantum-Si was founded in 2013.
Quantum-Si is headquartered in Branford, United States.
Quantum-Si operates in Biotechnology, Health Care, Life Sciences and Pharmaceutical. Its work centres on Proteomics, Protein Sequencing, Single-Molecule Analysis and Kinetic-Based Detection. Its customers include Research Laboratories, Biotechnology Companies and Pharmaceutical Companies.
Quantum-Si has a B2B and Platform business model. Its revenue comes from Product Sales, Service Fee and Subscription.
Quantum-Si has approximately 186 employees.
Quantum-Si has completed 5 funding rounds, raising a total of $215.00M. The latest funding stage is IPO.
Quantum-Si offers: Single-molecule Protein Sequencing, Protein Barcoding, Antibody Sequencing and Characterization, Protein Variant Analysis, PTM (Post-translational Modification) Analysis.
Top alternatives and competitors to Quantum-Si include Rapid Novor, Sarmal, Inc., PROTEINA, Quanterix. These companies operate in related industries and serve comparable markets. You can compare them side by side on Bounce Watch.
Quantum-Si and Rapid Novor are both companies in similar industries. Compare their funding, team size, growth signals, and market position on Bounce Watch to see which one fits your needs.

Source: BounceWatch company record for Quantum-Si, https://bouncewatch.com/company/quantum-si, updated 27 June 2026. When citing, please name BounceWatch and link this page.

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