YC S12 Startups
Every Y Combinator Summer 2012 company we currently index.
About YC S12
The Y Combinator S12 batch (Summer 2012) brought 45 tech startups into our index. This page lists every S12 company we currently track, with logos, taglines, and links straight to their own sites — no paywalled middleman. Notable S12 companies include Benchling, Coinbase, Instacart, 9gag, and BackerKit. Each profile surfaces team size, founding year, location, and open roles when their careers page is publicly scrapable. The S12 cohort skews toward Consumer, Dev Tools, and Productivity — common patterns we see in this batch. Recurring tags across these companies: SaaS, B2B, Education, E-commerce, Marketplace. The directory's filter UI accepts any of them as a query. Geographically, the S12 batch we have leans toward San Francisco, Los Angeles, and Burlingame, with the rest spread across remote-first teams and other hubs. 3 of these are 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 S12 batch?
S12 is the Y Combinator batch code for the Summer 2012 cohort. Companies joining a YC batch go through a 3-month program in California and demo their product at the end. techstartupslist.com indexes 45 tech startups from this batch.
How many companies are in YC S12?
Our index currently tracks 45 active tech startups from the YC S12 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 S12?
Among the S12 companies indexed here: Benchling, Coinbase, and Instacart, and 42 more on this page. Click any profile for category, team size, founding year, and open roles.
Where can I find open jobs at YC S12 startups?
Open roles from indexed S12 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 S12 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.