Another Seattle-area startup just reached a billion-dollar valuation as Auth0 announced a big $103 million funding round on Monday. Based in Bellevue, Wash. and founded in 2013, Auth0 helps developers build identity authentication capabilities into their applications. More than 7,000 customers such as Atlassian, SPgroup, fuboTV, and others across 70-plus countries use Auth0 to secure their web, mobile, and legacy apps. Silicon Valley’s Seattle secret: Bay Area investors making record number of deals in region’s startups Total funding to date is more than $210 million for Auth0, which said its valuation has now surpassed $1 billion.