Quantum SI: Funding, Investors & Team (Oct 2026)
Quantum-Si is focused on revolutionizing the growing field of proteomics. The company’s suite of technologies are powered by a first-of-its-kind semiconductor chip designed to enable single-molecule next-generation protein sequencing and genomics, and digitize proteomic research in order to advance drug discovery and diagnostics beyond what has been possible with DNA sequencing.
Quantum SI has raised $100M across 2 funding rounds on record, the most recent an undisclosed round of $50.0M announced in Jul 2025.
That round is above the $8.1M median round size for Biotechnology companies tracked on FundedIQ over the last two years.
Quantum SI Company Profile and Key Stats
Latest funding round on record: Jul 2025.
Quantum SI Funding Rounds
Quantum SI raised $50.0M in an undisclosed round announced in Jan 2025.
6 months later, an undisclosed round of $50.0M was announced in Jul 2025.
Quantum SI Founders and Leadership Team
No contact details are on record for this team yet.
Quantum SI Funding Compared to Other Biotechnology Startups
Quantum SI's latest round of $50.0M is above the median round in Biotechnology. Medians cover the last 24 months of disclosed rounds.
Funded Startups Like Quantum SI in Biotechnology and Guilford
Companies Similar to Quantum SI
Kallyope, we believe that the gut is the gateway to our internal world. Containing millions of neurons, the…
Astrocyte Pharmaceuticals is a drug development company that helps in the recovery and well-being of brain…
Tiny Health offers a gut health test specifically designed for mothers and babies aged 0 to 3 years.…
Junevity is dedicated to using cutting-edge transcription factor medicines to combat age-related diseases.…
Arkea Bio creates technology aimed at reducing greenhouse gas (GHG) emissions in the agricultural sector.
Serán is a contract development and manufacturing organization providing a comprehensive suite of…
Precision’s goal is to provide breakthrough treatments for the one billion patients worldwide suffering from…
Enveda is a biotechnology company that utilizes AI-powered tools to explore and characterize molecules from…
Avery Therapeutics, Inc. is a company dedicated to developing tissue engineered therapeutics to treat…
Circle Pharma is a biotechnology company in the initial stages of development that uses unique computational…
Evvy is for people with vaginas who want to be empowered with information about their microbiome. Their…
Quantum SI Funding FAQs
What does Quantum SI do?
Quantum-Si is focused on revolutionizing the growing field of proteomics. The company’s suite of technologies are powered by a first-of-its-kind semiconductor chip designed to enable single-molecule next-generation protein sequencing and genomics, and digitize proteomic research in order to advance drug discovery and diagnostics beyond what has been possible with DNA sequencing.
How much funding has Quantum SI raised?
Quantum SI has raised $100M across 2 rounds on record. The most recent is an undisclosed round of $50.0M announced in Jul 2025.
When did Quantum SI last raise funding?
Quantum SI's most recent funding round on record is an undisclosed round of $50.0M, announced in Jul 2025.
Who founded Quantum SI?
FundedIQ lists Jonathan M Rothberg (Founder), Jonathan Rothberg (Founder) at Quantum SI.
Where is Quantum SI headquartered?
Quantum SI is based in Guilford, Connecticut, United States.
How many employees does Quantum SI have?
Quantum SI is in the 101-250 employee band.
How does Quantum SI's funding compare to other Biotechnology startups?
Quantum SI's latest round of $50.0M is above the $8.1M median round size for Biotechnology companies on FundedIQ across 4,185 tracked companies over the last two years.
About FundedIQ's Quantum SI Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Quantum SI is left off this page rather than filled in.
Know who just raised. Then know who to reach.
Startup funding intelligence on every funded startup: the round, the investors and the founders, as a file in your inbox or searchable in the app.
Radar from $49/mo · Pro from $149/mo. Card required, nothing charged until day 15, and we email you 3 days before that. Need something specific? Custom plans from $499/mo.