Retro Biosciences vs Stipple Bio
Side-by-side comparison of AI visibility scores, market position, and capabilities
Largest-funded pure-play longevity startup raising $1B Series A at $5B valuation; Sam Altman-backed; pursuing cellular reprogramming, autophagy, and plasma factor therapeutics in parallel; first human trial targeting Australia launch.
About
Retro Biosciences is the largest-funded pure-play longevity company in history, raising $1 billion in Series A financing at a $5 billion valuation with Sam Altman (OpenAI CEO) as a primary backer. The company is pursuing cellular reprogramming, autophagy enhancement, and plasma factor therapeutics in parallel — a multi-pronged approach to extending healthy human lifespan by targeting the cellular hallmarks of aging simultaneously.
Precision oncology company emerged from stealth Apr 2026 with $100M oversubscribed Series A co-led by RA Capital and a16z Bio; Pointillist platform identifies novel tumor-specific epitopes for antibody-drug conjugates beyond existing ADC targets.
About
Stipple Bio is a precision oncology company that emerged from stealth in April 2026 with a $100 million oversubscribed Series A. The round was co-led by RA Capital Management, Andreessen Horowitz Bio+Health, and Nextech, with additional participation from GV and Emerson Collective — a top-tier syndicate that signals strong scientific conviction in the platform.
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