Spear Bio

Spear Bio is an early-stage diagnostics company commercializing its patented SPEAR (Successive Proximity Extension Amplification Reaction) technology, invented at Harvard's Wyss Institute. The platform's key innovation is a two-factor authentication mechanism that drastically reduces background noise, enabling attomolar-level detection of protein biomarkers from just 1 µL of sample without complex wash steps. This positions the company to address critical needs in biomarker research and clinical diagnostics where sensitivity and sample volume are limiting factors.

SPEAR (Successive Proximity Extension Amplification Reaction) technology: a homogeneous, wash-free, ultra-sensitive protein detection platform using DNA-barcoded antibodies and qPCR with a proprietary two-factor authentication mechanism to eliminate background noise.

Spear Bio competes in the ultrasensitive protein detection market against established players like Quanterix (SIMOA digital ELISA) and Olink (proximity extension assays), as well as other emerging platforms. Its key claimed differentiators are lower background via two-factor authentication, reduced dependence on antibody affinity, and a homogeneous, wash-free workflow using minimal sample volume.