Mantis Biotech vs Karius
Side-by-side comparison of AI visibility scores, market position, and capabilities
YC-backed AI company raised $48M Series A co-led by a16z Bio and GV in Feb 2026; builds digital twins of human physiology to generate diverse synthetic clinical trial populations, addressing chronic underrepresentation of women and minorities.
About
Mantis Biotech is a YC-backed AI company that builds digital twins of human physiology to synthesize diverse, realistic clinical trial populations. The company addresses one of drug development's most persistent problems: clinical trials consistently underrepresent women, elderly patients, and minorities, producing efficacy data that fails to predict real-world outcomes across populations. Mantis's AI platform generates synthetic patient data that fills these representation gaps.
Karius raised $409M total including a $100M Series C in May 2024; its genomic blood test detects 1,000+ pathogens at 400+ U.S. hospitals; launched Karius Focus BAL for pneumonia in April 2025.
About
Karius is a Redwood City, CA-based life sciences company founded in 2014 that developed the Karius Test — a single blood draw that uses next-generation sequencing and AI to detect over 1,000 pathogens (bacteria, fungi, viruses, parasites) in seriously ill patients. The test is used when conventional cultures and targeted diagnostics fail, providing clinicians at transplant centers, children''s hospitals, and ICUs with a comprehensive pathogen report within 24 hours.
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