Y Combinator Winter 2021 Batch Companies

Winter 2021 captures a strong mix of startups modernizing core business and technical workflows. From rapid commerce and global hiring to observability, app release tooling, and serverless infrastructure, the batch reflects YC’s continued emphasis on products with real operational leverage. Companies surfaced from the batch include Zepto in rapid commerce, Ontop in global payroll and hiring, SigNoz in observability, Runway in mobile release infrastructure, Popl in go-to-market tooling, and Webiny in serverless developer infrastructure. This page gives you a structured way to explore startups building the systems behind modern payments, global employment, observability, product delivery, and enterprise growth.

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Each row includes company details, founder profiles, relevant links, and key startup information in one place, giving you a fast way to research companies, identify trends, and find founders for recruiting, partnerships, or outreach.