The supply chain has a transparency problem. We built the fix.
24% of ads.txt entries fail sellers.json verification. DSPs see this. Publishers don't. BeamFlow closes that gap.
What BeamFlow does
BeamFlow continuously crawls and cross-references ads.txt files against 2,000+ SSP sellers.json files. We flag unauthorized sellers, broken IDs, missing entries, and supply chain mismatches that cost publishers CPMs and cost SSPs buyer trust.
Our crawlers operate independently. We don't need publishers to upload files or SSPs to grant access. We monitor the ecosystem the same way DSPs do, and surface exactly what they see.
The result: publishers fix what's broken before it costs them money. SSPs clean up before they lose demand.
For Publishers
See your ads.txt the way DSPs see it. Fix verification failures, remove unauthorized sellers, and recover lost bid density.
For SSPs
Audit your sellers.json, verify publisher authorization, and track how you compare against competitors in the supply chain.
The Data Advantage
220K+ domains, 60M+ lines, 2,000+ sellers.json files. Continuously updated. Approaching full coverage of the programmatic ecosystem.
What we believe
Transparency wins
The supply chain is too opaque. Publishers and SSPs deserve to see exactly what buyers see. No surprises, no hidden breakage.
Revenue follows quality
Clean supply chains earn more. Fewer unauthorized sellers means more buyer trust, more bids, and higher CPMs.
Independent by design
We're not an SSP. Not a DSP. We monitor the ecosystem independently, so our data has no conflict of interest.
Who built BeamFlow
BeamFlow was founded by Guy Alon, who spent 15 years in adtech managing supply chains for leading companies. After years of cleaning ads.txt files manually with spreadsheets and email chains, he built the tool he always wished existed.
What started as a personal automation tool now monitors the entire programmatic ecosystem.
See what DSPs see
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