Flock Bio
In Alameda, California, there is a company called Flock Bio that most people will never see, but every serious molecular biology team will eventually feel. It shows up when a screen collapses under noisy libraries. It shows up when frameshifts and early stops drain signal from months of work. Inside today’s biotech startup ecosystem, where timelines are tight and capital is disciplined, library integrity is not a detail. It is leverage. Flock Bio builds custom pooled DNA libraries for high throughput molecular biology with a clear mandate: move fast without compromising fidelity.
Mat Falkowski, CEO, brings 20+ years across cancer diagnostics, consumer genetics, carrier panels, genetic medicines, and next generation sequencing. Ginkgo Bioworks. Circularis Biotechnologies. Invitae. 5+ exits. That track record reads less like a résumé and more like operating history inside the modern genomics buildout. Matthew Youngblut, Ph.D., CSO, developed his edge across synthetic biology and clinical diagnostics at Ginkgo Bioworks, Twist Bioscience, Circularis Biotechnologies, and Roche. Chris Yuen, Head of Production, contributes hands-on depth in genetic medicine and molecular genetics from Ginkgo Bioworks, Circularis Biotechnologies, and the University of Hawaii. This is leadership shaped by real assay pressure, not slide decks.
The numbers are direct. Single diversity pool libraries shipped in as fast as 6 business days. Library construction and QC starting at $6,700. Diversities exceeding 100,000,000+ variants. A proprietary background suppression method that typically drives starting vector, missing inserts, and multiple inserts below 0.1%. In pooled screening, that margin defines whether capital converts into insight or evaporates into statistical fog.
Cloning Lite supports streamlined single insert builds up to 350 nt ssDNA or 7 kb dsDNA, delivered as E. coli glycerol stocks with ONT QC snapshots. Full Service Cloning, starting at $18,500, expands the architecture to single, double, or triple insert pools, mixed bases, structured or random barcodes, and maxiprep scale plasmid with endofree options. Full NGS QC across Illumina, Element, or PacBio platforms includes variant to barcode association tables. Custom vectors are included, and viral backbones such as AAV and lentiviral are supported. Their acceptor vector system enables up to 4 rounds of cloning while maintaining <0.1% misassembly. That is engineering discipline embedded into workflow.
FrameSift addresses the pain point every coding library eventually hits. ORF fidelity. It enriches long ORF pools for in-frame, functional coding sequences and reduces wasted screen coverage from indels and early stops. When null variants dominate readouts, enrichment becomes capital efficiency. In the current startup ecosystem, where every experiment must justify its burn, that distinction matters.
Functional genomics. Protein and enzyme engineering. Gene therapy. RNA therapeutics. Advanced screening. Flock Bio operates where design ambition meets biological constraint. If your platform depends on library integrity, the infrastructure behind it becomes strategic. And in a competitive startup ecosystem, strategic infrastructure is often the quiet advantage that separates noise from signal.