YC W13 Startups
Every Y Combinator Winter 2013 company we currently index.
About YC W13
The Y Combinator W13 batch (Winter 2013) brought 32 tech startups into our index. This page lists every W13 company we currently track, with logos, taglines, and links straight to their own sites — no paywalled middleman. Notable W13 companies include Fivetran, Bitnami, BuildZoom, Cheetah, and CircuitLab. Each profile surfaces team size, founding year, location, and open roles when their careers page is publicly scrapable. The W13 cohort skews toward Consumer, Infrastructure, and Healthcare — common patterns we see in this batch. Recurring tags across these companies: SaaS, Analytics, Marketplace, Data Engineering, E-commerce. The directory's filter UI accepts any of them as a query. Geographically, the W13 batch we have leans toward San Francisco, New York, and Mountain View, with the rest spread across remote-first teams and other hubs. 1 of these is currently flagged as trending based on momentum signals; and the listing refreshes whenever the scrape runs, so changes propagate without a manual edit.
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Frequently asked questions
What is the YC W13 batch?
W13 is the Y Combinator batch code for the Winter 2013 cohort. Companies joining a YC batch go through a 3-month program in California and demo their product at the end. techstartupslist.com indexes 32 tech startups from this batch.
How many companies are in YC W13?
Our index currently tracks 32 active tech startups from the YC W13 batch. New companies appear here automatically when our daily scraper finds them; companies that shut down are flagged inactive and hidden from listings.
Which companies graduated from YC W13?
Among the W13 companies indexed here: Fivetran, Bitnami, and BuildZoom, and 29 more on this page. Click any profile for category, team size, founding year, and open roles.
Where can I find open jobs at YC W13 startups?
Open roles from indexed W13 companies appear on our /jobs page, aggregated alongside roles from other indexed startups. Each role links directly to the company's official application page.
How often is the YC W13 page updated?
Automated scrapers refresh this page daily. The last index update was 2026-07-17. Inactive companies fall out of the count automatically — we don't keep dead listings live.