Best Infectious Diseases Companies in San Francisco, United States
The 53 best Infectious Diseases companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Brii Biosciences.
Our analysis of 50 Infectious Diseases companies
$7.1b in tracked funding; 59% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Infectious Diseases companies in San Francisco
| # | Company | Disclosed funding | Last round | Employees | Founder | Stage | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Brii Biosciences Developer of biologics to treat hepatitis B infection | $515M | 58 mo ago | 68 68 → 83 (+22%) · sector median +39% | Zhi Hong Co-Founder & CEO | Public | 106 patents Antiviral nucleoside analogs/capsid inhibitors and neurosteroid-based CNS therapeutics | — |
| 2 | Bluejay Therapeutics Developer of therapeutics for the treatment of infectious diseases | $243M | 26 mo ago | 3 | Keting Chu Founder | Acquired | — | — |
| 3 | Aligos Therapeutics Developer of therapies to treat hepatologic diseases and viral infections 50Patents top 12%Innovation top 16%Funding top 26%Moat top 35% All 12 signals ▾Patentstop 12% Innovationtop 16% Fundingtop 26% Moattop 35% Partnerstop 40% Techtop 42% Talenttop 45% Globaltop 46% Newstop 47% Marketbottom 46% Growthbottom 32% Fin. healthbottom 25% Patents: 503 patents matched (strict assignee match) · 389 filings since 2022 vs 114 in 2017-21 Innovation: 503 patents (top 5% of patent-holders) · 389 filings since 2022 vs 114 in 2017-21 rank vs industry peers · Fliar Intelligence Index 50/100 | $225M | 17 mo ago | 70 70 → 99 (+41%) · sector median +39% | Lawrence Blatt CEO | Public | 503 patents RNA interference therapeutics and PD‑L1 immuno‑oncology using heterocyclic siRNA delivery compounds | — |
| 4 | Vir Biotechnology Developer of therapeutics for the treatment of infectious diseases | $216M | 74 mo ago | 417 417 → 471 (+13%) · sector median +39% | Klaus Frueh Co-Founder | Public | 423 patents Broadly neutralizing antiviral antibodies and combination therapies for hepatitis B and respiratory viruses | — |
| 5 | CytoVale Microfluidic-based biomarkers for the early detection of sepsis 60Funding top 19%Product top 21%Patents top 26%Innovation top 32% All 10 signals ▾Fundingtop 19% Producttop 21% Patentstop 26% Innovationtop 32% Moattop 32% Techtop 38% Growthtop 47% Marketbottom 42% Globalbottom 42% Newsbottom 21% Funding: Raised $207M across 14 rounds · 14 rounds over 13 yrs (1.1/yr) Product: 4 distinct product lines · Company stage: Series D rank vs industry peers · Fliar Intelligence Index 60/100 | $207M | 21 mo ago | 58 58 → 120 (+107%) · sector median +39% | — | Series D | 38 patents Point-of-care diagnostic platforms for immune activity and sepsis monitoring | — |
| 6 | Inflammatix Provider of diagnostic solutions for systemic infections 74Funding top 17%Patents top 22%Growth top 26%Innovation top 27% All 10 signals ▾Fundingtop 17% Patentstop 22% Growthtop 26% Innovationtop 27% Moattop 28% Talenttop 35% Techtop 43% Marketbottom 45% Globalbottom 42% Newsbottom 18% Funding: Raised $191M across 11 rounds · 11 rounds over 9 yrs (1.2/yr) Patents: 52 patents matched (strict assignee match) · 36 filings since 2022 vs 16 in 2017-21 rank vs industry peers · Fliar Intelligence Index 74/100 | $191M | 22 mo ago | 54 54 → 75 (+39%) · sector median +39% | Jonathan Romanowsky Co-Founder and Chief Business Officer | Series E | 52 patents Patents concentrated in chemistry & materials | 1 launch · 2 partnerships |
| 7 | Achaogen Developer of antibiotics to treat multi-drug resistant bacterial infections | $101M | 110 mo ago | 42 | — | Public | 230 patents Patents concentrated in chemistry & materials | — |
| 8 | Presidio Pharmaceuticals Developer of small-molecule antiviral therapeutics | $92M | 145 mo ago | 12 | Omar Haffar Co-Founder | Series C | 177 patents Patents concentrated in chemistry & materials | — |
| 9 | Rigel Developer of drugs for hematologic disorders, cancer, and rare immune disease | $76M | 65 mo ago | 147 147 → 292 (+99%) · sector median +39% | Raul Rodriguez President and CEO | Public | 6 patents Patents concentrated in computing, sensing & instrumentation | 3 partnerships |
| 10 | Vaxart Developer of therapeutic solutions for treating multiple infectious diseases | $58M | 138 mo ago | 110 110 → 108 (-2%) · sector median +39% | Steve Lo Chief Executive Officer | Public | 104 patents Patents concentrated in health & consumer products | — |
| 11 | Epiphany Biosciences Trusted online lottery and *toto* platform with complete markets | $36M | 111 mo ago | 2 | — | Deadpooled | — | — |
| 12 | Prosetta Biosciences Developer of antiviral and other therapeutics using proprietary drug discovery platform | $35M | 128 mo ago | 14 14 → 23 (+64%) · sector median +39% | Vishwanath Lingappa CEO and CTO | Series D | — | — |
| 13 | Delve Bio Developer of sequencing platform to detect neuro-infectious pathogens | $35M | 37 mo ago | 2 | Bradley Murray Founder & CEO | Series A | — | — |
| 14 | KAINOMYX Developer of therapeutic solutions for treating malaria and other parasitic diseases | $16M | 22 mo ago | 9 | — | Seed | — | — |
| 15 | Lighthouse Pharma Developer of therapeutics for neurology and infectious diseases 11Funding top 46%Talent bottom 49%Tech bottom 45%Global bottom 25% All 5 signals ▾Fundingtop 46% Talentbottom 49% Techbottom 45% Globalbottom 25% Marketbottom 18% Funding: Raised $15.2M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 11/100 | $15M | 3 mo ago | 4 | Casey Lynch Chief Executive Officer | Series A | — | 1 job opening |
| 16 | Phylagen Provider of genome sequencing technology for microbial analysis | $14M | 89 mo ago | 44 | Peter Karlen CEO & Board of Directors | Deadpooled | 10 patents Patents concentrated in computing, sensing & instrumentation | — |
| 17 | Specific Technologies Detection and antibiotic susceptibility testing for blood infection | $12M | 77 mo ago | 68 | Paul Rhodes Co-Founder & CEO | Acquired | 4 patents Patents concentrated in chemistry & materials | — |
| 18 | Jaguar Health Developing gastrointestinal products for human prescription use and animals 50Product top 14%Funding top 24%Innovation top 34%Growth top 43% All 11 signals ▾Producttop 14% Fundingtop 24% Innovationtop 34% Growthtop 43% Talentbottom 49% Marketbottom 48% Fin. healthbottom 48% Moatbottom 45% Newsbottom 41% Techbottom 33% Globalbottom 32% Product: 4 distinct product lines · Company stage: Public Funding: Raised $11.6M across 28 rounds · 28 rounds over 12 yrs (2.3/yr) rank vs industry peers · Fliar Intelligence Index 50/100 | $12M | 6 mo ago | 46 46 → 35 (-24%) · sector median +39% | Lisa Conte Founder & CEO | Public | — | 1 launch · 1 partnership |
| 19 | Trellis Bioscience Human antibodies against infectious diseases and cancer | $10M | 15 mo ago | 6 | Stefan Ryser President & CEO | Series C | 170 patents Antibody-based therapeutics and vaccines targeting RSV and influenza viral proteins. | — |
| 20 | Centivax Provider of drug discovery services 55Growth top 25%News top 28%Funding top 32%Patents top 32% All 9 signals ▾Growthtop 25% Newstop 28% Fundingtop 32% Patentstop 32% Innovationtop 40% Moattop 47% Globalbottom 40% Techbottom 39% Marketbottom 29% Growth: Fresh capital in last 24 mo News: 5 BI events in 12 mo (of 5 tracked, 2 types) · 4 high-value events (IPO/M&A/funding/contracts) in 12 mo rank vs industry peers · Fliar Intelligence Index 55/100 | $10M | 3 mo ago | 19 | — | Series A | 39 patents Peptide-derived therapeutic antibodies and low-dose vaccine formulations targeting viral antigens | — |
| 21 | Senzo Developer of point-of-care diagnostic device for the detection of infectious diseases | $10M | 33 mo ago | 13 | — | Seed | — | — |
| 22 | Granza Bio Developer of therapeutics for the treatment of cancer | $8M | 24 mo ago | — | Ashwin Nandakumar Co-Founder & CEO | Seed | — | 1 award |
| 23 | Ascella Biosystems Developer of diagnostic device for the detection of infectious diseases | $6M | 31 mo ago | 6 | Deepak Boggavarapu Co-Founder | Series A | — | — |
| 24 | EpiBiome Developer of small-molecule antibiotics for use in agriculture and human health | $6M | 109 mo ago | 14 | — | Acquired | 7 patents Patents concentrated in health & consumer products | — |
| 25 | Gemmus Pharma Develops therapeutics for influenza | $5M | 145 mo ago | 6 | Daryl Faulds Co-Founder & CEO | Deadpooled | — | — |
| 26 | CellScope In-ear visibility using mobile device for at-home diagnosis | $5M | 152 mo ago | 12 | — | Series A | 3 patents Patents concentrated in health & consumer products | — |
| 27 | Flow Pharma Developer of immunotherapy platform for infectious disease prevention and cancer therapy | $4M | 23 mo ago | 18 | Reid Rubsamen Founder & CEO | Seed | — | — |
| 28 | Wave 80 Biosciences Instruments and consumables for infectious diseases | $3M | 170 mo ago | — | Dan Laser CEO & Founder | Funding Raised | — | — |
| 29 | MicroQuin Developer of therapies for treating multiple diseases | $2M | 14 mo ago | 4 | Scott Robinson Founder | Funding Raised | 13 patents Peptide-based anticancer therapeutics and substituted chalcone small‑molecule drugs | — |
| 30 | BioSynesis Developer of biofilm-specific therapeutics for the treatment of infectious diseases | $1M | 47 mo ago | — | Clarissa Nobile Founder & CEO | Funding Raised | — | — |
| 31 | Advanced Genetic Systems Developer of Ribonucleoprotein complex based antiviral therapeutics for HIV treatment | $848K | 210 mo ago | — | Alan Frankel Founder | Deadpooled | — | — |
| 32 | EnGen Bio Developer of vaccines for influenza disease | $817K | 63 mo ago | 6 | Mark Alfenito CEO & President | Seed | — | — |
| 33 | Encentrio Therapeutics Developer of therapeutics to treat multiple diseases | $400K | 39 mo ago | — | Natascha Schill CEO | Seed | — | — |
| 34 | CASPR Biotech Developer of Cas-based diagnostics platform | $400K | 72 mo ago | 20 | Franco Goytia Co-Founder & CEO | Seed | — | — |
| 35 | mFluiDx Point-of-care molecular diagnostics enabling rapid, low-cost DNA/RNA testing | $250K | 97 mo ago | 3 | — | Seed | 2 patents Patents concentrated in computing, sensing & instrumentation | — |
| 36 | TheraBiol Antibodies to treat viral infections. | $150K | 165 mo ago | — | Girish Vyas Founder & CEO | Deadpooled | 6 patents Patents concentrated in chemistry & materials | — |
| 37 | One Codex Microbiome sequencing and analysis platform for accelerating research and discovery | $120K | 144 mo ago | 16 | — | Seed | — | — |
Top 12 Infectious Diseases companies in San Francisco
#1
Series A · San Francisco, California · founded 2019 · 4 employees$15.2Mraised▾
Developer of therapeutics for neurology and infectious diseases. It offers a pipeline of drug candidates which include LHP588, is a next-generation gingipain inhibitor for gingivalis infection which causes Alzheimer's disease, Parkinson's disease, and oral dyslapsia. It also offers LHP852 for gingivalis infection and LHP803 for coronavirus infection.
- Apr 2026Series A$15.2M
#2
Series A · San Francisco, California · founded 2019 · 19 employees$10Mraised▾
Provider of drug discovery services
- Mar 2026Series A$37M
- Jul 2025Series A$45M
- Jul 2025Grant (prize money)$24M
- Nov 2022Seed$10M
#3
Public · San Francisco, California · founded 2013 · 46 employees$11.6Mraised▾
Jaguar Health is engaged in developing novel, sustainably derived gastrointestinal products for humans and animals. The company focuses on developing and commercializing proprietary human gastrointestinal pharmaceuticals for the global marketplace from plants used traditionally in rainforest areas. Canalevia is the company's lead animal prescription drug product candidate intended for the treatment of various forms of diarrhea in dogs and Equilevia is Jaguar's non-prescription product for total gut health in equine athletes.
- Jan 2026Grant (prize money)$240K
- Sep 2025Post IPO$2.4M
- Feb 2023Post IPO—
- Jul 2022Post IPO$300K
#4
Public · San Francisco, California · founded 2018 · 70 employees$225Mraised▾
Aligos Therapeutics has developed small molecule-based therapeutics for the treatment of hepatologic diseases and viral infections. The drugs target viral nucleic acids, encoded proteins, oncogenes, and resultant proteins for the treatment. It has developed drugs to treat chronic hepatitis B, nonalcoholic steatohepatitis, and hepatocellular carcinoma.
- Feb 2025Post IPO$105M
- Oct 2023Post IPO$92.2M
- Jan 2020Series B$125M
- 2018Series A$100M
#5
Series D · San Francisco, California · founded 2013 · 58 employees$206.8Mraised▾
CytoVale is focussed on developing biomarkers for the early detection of sepsis, an infectious reaction that can lead to lung, kidney and liver failure. Its technology is based on the mechanical properties of individual cells (mechanomics). The instrument uses microfluidics to route and physically probe individual cells and claims to have the capacity to measure over 10 biophysical cell markers at rates above 2k cells per second, providing a high-throughput detection of the disease.
- Oct 2024Series D$100M
- Nov 2023Series C$84M
- Feb 2022Grant (prize money)$9M
- Jan 2021Conventional Debt$8M
#6
Series E · San Francisco, California · founded 2016 · 54 employees$191.5Mraised▾
Provider of diagnostic solutions for systemic infections. Its proprietary technology, based on research from Stanford University, measures gene expression patterns related to the immune system to diagnose sepsis. It provides products such as InSep for acute infection and sepsis tests, ViraBac for acute infection tests, SARC-CoV-2 swabs, etc.
- Sep 2024Series E$57M
- Jul 2023Grant (prize money)$299.8K
- Nov 2021Grant (prize money)$12.1M
- Nov 2021Grant (prize money)$1.7M
#7
Series C · San Francisco, California · founded 1998 · 6 employees$10.2Mraised▾
Trellis Bioscience is a biotech company that develops human antibodies against infectious diseases and cancer. The company's technology platform, CellSpot, identifies B-cells that produce desirable human antibodies for therapeutic use. The company licensed a pre-IND stage anti-RSV mAb to MedImmune in 2009 and licensed its influenza A and B program to ContraFect in 2014. The company's current lead program is focused on pandemic influenza. The company also has discovered antibodies against following immuno-oncology targets: TIM-3 (T-cell immunoglobulin and mucin domain 3), LAG-3 (Lymphocyte-activation gene 3), KIR (Killer cell immunoglobulin-like receptors), CEACAM (Carcino-Ebryonic Antigen) and B7-H3.
- Apr 2025Grant (prize money)$297.9K
- Sep 2020Grant (prize money)$3M
- Jan 2020Grant (prize money)$3.2M
- Feb 2016Grant (prize money)$5.8M
#8
Acquired · San Francisco, California · founded 2019 · 3 employees$243Mraised▾
Developer of therapeutics for the treatment of infectious diseases. The company's lead candidate drug is BJT-778, a human anti-HBsAg monoclonal antibody for the restoration of adaptive immunity. Another drug candidate is BJT-754, a small molecule HBsAg inhibitor an oral small molecule drug for HBV infection.
- May 2024Series C$182M
- Aug 2022Series B$41M
- 2020Series A$20M
#9
Seed · San Francisco, California · founded 2019 · 9 employees$15.6Mraised▾
Developer of therapeutic solutions for treating malaria and other parasitic diseases
- Sep 2024Grant (prize money)$175K
- Oct 2021Angel$6M
- Sep 2021Grant (prize money)$2M
- May 2020Angel$7.5M
#10
Funding Raised · San Francisco, California · founded 2016 · 4 employees$1.7Mraised▾
Developer of therapies for treating multiple diseases. The company has developed targeted therapeutics to modulate TMBIM6 an intracellular transmembrane protein. The company has developed a drug pipeline for Oncology, infectious diseases, and Parkinson's disease.
- Apr 2025Grant (prize money)$299.2K
- Sep 2023Grant (prize money)$999.3K
- Jun 2023Grant (prize money)$348.9K
- Jul 2022Grant (prize money)$97.3K
#11
Public · San Francisco, California · founded 2018 · 68 employees$515Mraised▾
Developer of biologics to treat hepatitis B infection. It has clinical programs focused on hepatitis B virus (HBV) infection and immunotherapeutics to treat infectious diseases. It has licensed rights to develop a recombinant protein-based immunotherapeutic (VBI-2601) from VBI Vaccines in China. It is also developing VIR-2218, an investigational RNA interference (RNAi) therapeutics to treat hepatitis B infection (licensed from Vir Biotechnology).
- Sep 2021Post IPO$100M
- Mar 2021Series D$155M
- May 2018Series D$260M
#12
Seed · San Francisco, California · founded 2002 · 18 employees$3.8Mraised▾
Developer of immunotherapy platform for infectious disease prevention and cancer therapy. It offers T-cell therapy platform for development of therapeutics which include FLOVID-20 for covid, FlowVAx is an Ebola vaccine, FlowVax BreastCA for breast cancers, and FlowVax HPV for HPV-induced cervical and throat cancer.
- Jul 2024Seed$225K
- Nov 2022Seed$180K
- Mar 2016Seed$2.3M
- Apr 2011Seed$1.1M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Infectious Diseases coverage by sub-theme.
Regulatory-risk over time falling
Funding & growth over time
funding flat · growth falling
How research on Diagnostics is moving in the United States
A read on the academic research around Diagnostics — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 8,526 United States-affiliated papers.
- Harvard University330
- Johns Hopkins University318
- Heidelberg University249
- Massachusetts General Hospital214
- The University of Texas MD Anderson Cancer Center191
- Liquid biopsy125→427
- Biopsy15→114
- Biomarker17→103
- Point-of-care testing112→195
- Cancer67→146
- Liquid biopsy183→739
- Biopsy42→285
- Biomarker55→208
- Cancer115→260
- Oncology57→183
- Liquid biopsy67→239
- Biopsy17→99
- Biomarker28→86
- Coronavirus disease 2019 (COVID-19)1→44
- Cancer55→92
Where diagnostics is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing diagnostics patents in the United States
United States diagnostics patent filing is accelerating — 418 filings from 196 assignees (2016–2025), led by Detect, UNIV Leland Stanford Junior, Washington University ST Louis; annual filings 13→55.
- Detect42
- UNIV Leland Stanford Junior33
- Washington University ST Louis20
- UNIV California19
- Nuclein19
- Texas A & M UNIV SYS19
- New England Biolabs18
- Tempus LABS18