1build is a software-as-a-service (SaaS) company that provides a platform for construction cost estimation and materials procurement. It was founded in 2003 and is headquartered in San Francisco, California.1build's core offering is an API that gives access to a database of over 68 million live construction cost data points covering materials, labor, and equipment costs for every county in the United States. This data is continuously updated to reflect real-time market pricing.