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Clerk , a startup creating a suite of embeddable UIs , APIs and admin dashboards that app developers can use to authenticate and do user , has raised $ 30 million in a Series B unit of ammunition led by CRV with participation from Stripe , Andreessen Horowitz and Madrona .

The proceeds bring Clerk ’s amount raised to $ 55.5 million , and cobalt - founding father and CEO Colin Sidoti aver that they ’ll be put toward expanding Clerk ’s military service beyond certification and into authorisation — that is , determining the permission a user has versus just identifying who they are .

Clerk was institute in March 2019 by Sidoti and his chum , Braden Sidoti . Both are engineers — Colin has a degree from MIT , while Braden graduated from Washington University in St. Louis and previously form at Uber and Inspirato .

shop assistant builds developer tools for assay-mark , offering drop - in constituent fool in React , the subject seed front - end JavaScript library . shop assistant attempts to detect malicious activity , like bot , while manage drug user datum on behalf of customers .

“ Despite hallmark and sanction being omnipresent challenges across every software company , they have been exceptionally slow to become outsourced , ” Colin said . “ When you expect developers why , they often highlight that assay-mark and authorization are too tightly coupled to the eternal sleep of their program to outsource . To work around this , Clerk defines authentication a niggling otherwise than our competitors : in some areas we do more , in others we do less . ”

shop clerk — mainly a self - serve program , with pricing base on the number of monthly alive users — will soon incorporate Stripe Billing to determine user permissions base on their subscription plan . The integration is motivated in part by the investment from Stripe , which Colin say score the commencement of a “ strategic partnership ” between the two firms .

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“ Stripe Billing helps developers create and manage user subscriptions , ” he add together . “ Since permission to access certain features typically depends on the user ’s subscription plan , Clerk need a tight integration with Stripe Billing to make a robust authorization solution . ”

Clerk , which claims to have around 1,300 paying customers and 16 million substance abuser under management for those customers , plans to maturate its hands from 55 mass to 80 by the end of the year as it compete against upstarts likeDescope , StytchandWorkOS . “ 2023 was a phenomenal twelvemonth for Clerk , and we anticipate continued quickening in 2024 , ” Colin said .