Biotech Startups

RAINBOW develops regenerative medicine products for brain repair, using autologous mesenchymal stem cells (MSCs) cultured from a patient's own bone marrow. The company works on custom cell-based therapies aimed at treating brain damage.

1 investor

Rainstick develops weather-event and biotech-related technology, drawing on hardware and software engineering. The page focuses on the team but indicates the company works at the intersection of agriculture, biotech, and transformative technology.

1 investor

Rakuten Medical is a global biotechnology company that develops and commercializes precision cell-targeting photoimmunotherapy treatments for cancer using its proprietary Alluminox platform. The company focuses on creating innovative cancer treatment options and bringing them to patients worldwide.

1 investor

RA Marketing PR is a marketing and positioning agency for life science organizations that combines human expertise with AI tools to inform commercial strategy and market positioning decisions.

1 investor

Durham, NC company building multi-camera array microscope (MCAM) systems for high-throughput live imaging in life-science labs.

1 investor

1 investor

Rancho Biosciences provides biomedical data services covering strategy, curation, bioinformatics, engineering, analytics, and AI-ready data products for life sciences and pharmaceutical R&D teams. It delivers harmonized, annotated datasets—including single-cell, spatial, and oncology data—to support research from discovery through clinical development.

1 investor

Rani Therapeutics develops oral drug delivery technology using robotic capsules to replace injectable biotherapeutics, addressing the challenge of delivering biologics through the gastrointestinal tract without needles. The company targets patients with chronic conditions who currently require painful injections.

1 investor

Rapafusyn develops molecular glue therapeutics using its RapaGlue platform of non-degrading macrocyclic compounds designed to modulate hard-to-drug intracellular and transmembrane protein targets. Its AI-enabled discovery approach and DNA-encoded library support an early-stage pipeline across oncology, immunology and inflammation, and renal disease, including a lead program in acute kidney injury.</parameter> <parameter name="hq_city">Baltimore

1 investor

Rapid-myco Technologies develops bacteriophage-based diagnostic tests for detecting mycobacterial infections in humans and livestock, with rapid turnaround times. The company offers tests for diseases including Johne's disease in livestock and tuberculosis in humans and animals.

1 investor

Rapid Novor develops protein sequencing software and methods for antibody analysis, combining bioinformatics and mass spectrometry technology. The company specializes in proteomics services for clients requiring high-throughput antibody sequencing.

1 investor

Rapid Nexus Nanotech Wound Solutions develops a regenerative medical device technology (Hemastyl) that aims to repair nerves, muscle, and vasculature to heal chronic non-healing wounds and prevent amputations. It targets patients with diabetes, trauma, and peripheral vascular disease in the peripheral neuropathy and diabetic foot ulcer markets.

1 investor

Rappta Therapeutics develops small molecule compounds that reactivate protein phosphatase 2A (PP2A) to treat cancer by restoring the enzyme's tumor suppressor function. The company targets the underlying mechanism of protein hyperphosphorylation that drives cancer progression.

1 investor

RasCal Therapeutics develops targeted cancer therapies aimed at previously "untargetable" mutations that drive some of the deadliest cancers, using novel mechanisms intended to work alongside conventional treatments, targeted therapies, and immunotherapies. The company is conducting human clinical trials of its lead anti-cancer compound.

1 investor

Rasyn.ai offers Marigold, an AI research assistant that lets scientists ask research questions, run tools, or delegate entire tasks, returning results such as structures, charts, code, and papers in panels. It provides 54 runnable tools, 40 executing on connected hardware and 14 on hosted endpoints.

1 investor

1 investor

Ravel develops an AI-powered platform for early disease detection by analyzing epigenomic profiles in cell-free DNA to identify cellular destruction markers.

1 investor

Restoring vision through optogenetics.

1 investor

RayBalance develops a proprietary, non-reformulation platform that treats the subcutaneous injection administration site as a delivery-performance variable to improve absorption predictability without altering a partner's drug product. It targets pharmaceutical companies, biosimilar manufacturers, and medical device companies working on follow-on/biosimilar differentiation, lifecycle strategy, and IV-to-SC transition.

1 investor

Raycaster is an AI workspace that reviews and revises regulatory and clinical documents (protocols, reports, modules, quality documentation) for biopharma companies to keep submissions aligned with scientific changes. It works on native document formats and traces impacts across interconnected dossiers for IND through lifecycle management.

1 investor

RCE Technologies develops a wrist-worn wearable (Infrasensor) that uses infrared sensors and machine learning to detect signals associated with severe coronary artery occlusion, aiming for earlier heart attack detection. The technology targets clinical and acute care settings such as emergency departments and pre-hospital paramedic use.

1 investor

RD Biotech provides a compact, high-throughput automated diagnostic testing platform that processes up to 1,440 samples in 24 hours across reproductive health, respiratory infections, bloodborne diseases, and enteroviruses. The system is designed for clinical laboratories and diagnostic facilities seeking space-efficient batch processing with flexible sample loading.

1 investor

RDD Pharma is a specialty pharmaceutical company developing targeted treatments for anorectal diseases and gastrointestinal disorders, such as fecal incontinence, pruritus ani, and radiation proctitis. It repurposes already-approved drugs combined with its proprietary drug-delivery technology to shorten the regulatory path while retaining patent protection.

1 investor

Reacta Healthcare provides standardized meal products for oral food challenge testing, which is a clinical procedure used in allergy diagnosis and management.

1 investor