News, guides & changelog
What we’re building and what we’re learning about Secretary of State data.
Entity Search API Reference Guide 2026
Master the entity search API with this reference guide covering parameters, matching logic, error handling, and SOSfinder integration examples.
10 Business Verification Software Tools for KYB
Compare 10 business verification software tools for KYB, KYC, APIs, registry data, use cases, pricing considerations, and implementation trade-offs.
Business Entity Data: Fields, Sources, and Integration
Understand business entity data end to end: core fields, provenance, normalization, real-world uses, and best practices for integrating registry data into your
What Is KYB Verification and How It Actually Works
Learn what is KYB verification, which entity checks it covers, and how APIs turn 50 state registries into one onboarding pipeline for your business.
KYB API: What It Is, How It Works, and How to Integrate
Learn what a KYB API does, the data it returns, and how to integrate business verification into onboarding and compliance workflows with clear examples.
10 Compliance Monitoring Software Platforms Compared
Compare 10 compliance monitoring software platforms by features, pricing transparency, integrations, use cases, and implementation considerations.
Introducing SOSfinder: one API for all 50 states
Stop stitching together fifty government websites. SOSfinder gives you normalized Secretary of State business-entity data behind a single endpoint.
How we cache Secretary of State lookups
Caching is what keeps SOSfinder fast and affordable. Here’s how we decide what to cache, for how long, and why you’re never billed twice.
UCC search is now in beta
Go beyond entity records. UCC filing search is rolling out in beta on Pro and above — same unified endpoint, same predictable JSON.