data-validation
(4)
Truthset
Truthset is an Oakland-based data intelligence company that validates the accuracy of consumer data used in marketing and advertising. Its patented TruthScore methodology assigns a 0-100% likelihood that any given data attribute about a person is actually true, letting brands, agencies, and data providers buy and activate audiences rated by accuracy instead of guessing. Truthset explicitly does not sell data or act as a broker - it positions itself as an independent arbiter of truth for a market where consumer data can carry up to 60% error.
OneSchema
OneSchema is a San Francisco data-integration company that turns the messy, unglamorous problem of importing spreadsheets into a solved one. Its embeddable CSV importer lets software teams ship a polished, validated file-import experience in about a day instead of building and maintaining fragile parsing scripts for months. Around that core, OneSchema has grown into a broader platform - recurring file feeds and, more recently, AI agents that autonomously intake, clean, and reconcile legacy data - aiming to be the default layer for the 'long-tail' data that never quite fits an API.
CertifyOS
CertifyOS is a New York-based healthcare technology company building the provider data infrastructure layer for health plans, health systems, and digital health companies. Its API-first platform automates credentialing, licensing, enrollment, and continuous network monitoring, unifying data from thousands of primary sources into a single, continuously updated source of truth. Founded by former Oscar Health operators, the NCQA-accredited CVO tracks 1,600+ data points per provider and manages 15+ million licenses, turning a notoriously slow, manual back-office process into real-time infrastructure.
Lightup Data
Lightup Data is a Mountain View-based enterprise data observability company that lets organizations monitor data quality at scale without moving their data. Its no-code platform pushes computation down into existing warehouses and lakehouses like Snowflake and Databricks, using AI-powered anomaly detection to catch data drift, outages, and discrepancies before they reach dashboards or AI models. Founded in 2019 and backed by Andreessen Horowitz, Lightup serves enterprises including AMD, Skechers, and KFC.