b12 Labs
Making hard molecules for Pharma and Biotech
Founders
- Zlatko JončevFounder/CEO
- Andres BranFounder/CTO
Same space
Competitors
Closest in what they build, same category.
Lavo Life SciencesW23AI for drug formulationShared: ai-powered drug discoveryInactive
Atlas DiscoveryS26AI-native pharma companyShared: ai-powered drug discoveryActive
PostEraW20Medicinal Chemistry powered by Machine LearningShared: ai-powered drug discoveryActive
Paceline BioF25Accelerating clinical ops for biotech & pharmaShared: ai-powered drug discoveryActive
Numerion LabsW15Artificial intelligence for drug discovery.Shared: ai-powered drug discoveryActive
Adjacent
Overlapping tags, a different niche.
1910W19Multimodal AI Platform for Modality Agnostic Drug Discovery™Shared: ai-powered drug discoveryActive
Ångström AIS24Gen AI molecular simulations that reproduce wetlab resultsShared: ai-powered drug discoveryActive
Multiply LabsS16Robotic production capacity for the pharma manufacturing industryShared: roboticsActive
Tamarind BioW24AI Inference Platform for Drug DiscoveryShared: ai-powered drug discoveryActive
ResistanceBioW19We solve drug resistance for cancerShared: ai-powered drug discoveryInactive
Also from S25 in AI
Batchmates in Summer 2025.
ConvexiaS25The world's first AI-maximalist pharma companyActive
DeepAware AI (Robotics Center of Silicon Valley)S25Robots, parts & RL envs & evals - delivered in 48 hrs / pickup in SF.Active
Physical TuringS25Evaluating humanoids in the real worldActive
RellingS25deploying the first billion robots for manufacturingActive
TopologicalS25Physics-based foundation models for CAD optimization.Active
AcrelyS25Enterprise Voice AgentsActive
About b12 Labs
b12 makes high-value molecules that are otherwise hard to make. We help pharma companies plan and make new drugs, accelerating early-stage drug discovery from years to months. Andres built the first AI agent that can autonomously think and make molecules in a robotic lab, published in Nature Machine Intelligence (1000+ citations), and won the best paper award at the NeurIPS AI for Science conference. Zlatko is a 3x National Chemistry Olympiad champion, competed at IChO level, and medicinal chemist who has worked at Roche and leading lab robotics companies. Combined, we have an extensive network of hundreds of chemists, automation scientists, and AI 4 Science researchers. We run paid pilots with big pharma companies, demonstrating that our platform planned a set of experiments that achieved full conversion in a single attempt, eliminating the iteration cycle.
San Francisco, CA, USA
b12 Labs: questions
Which YC batch was b12 Labs in?
b12 Labs was in Y Combinator's Summer 2025 batch (S25).
Is b12 Labs still active?
Y Combinator lists b12 Labs as active.
Who founded b12 Labs?
b12 Labs's founders, as listed on its YC page: Zlatko Jončev (Founder/CEO), Andres Bran (Founder/CTO).
Where is b12 Labs based?
b12 Labs lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.