YC W17 Batch — Complete Company List

W17 is historically significant for producing two of the most valuable companies in YC's entire portfolio: Brex and Faire, both of which achieved multi-billion-dollar valuations within a few years of demo day.

• Batch size: 117 companies
• Demo day: March 20-21, 2017
• Countries represented: 22
• Defining theme: International diversity, hardware and deeptech alongside SaaS
• Demo day format: Two days at the Computer History Museum, Mountain View
• Notable first: ACLU became one of the first nonprofits to go through YC

Fintech (W17)

Healthcare (W17)

Developer Tools (W17)

Other SaaS (W17)

Consumer (W17)

Industrial / Hardware (W17)

Entertainment / Media (W17)

Aerospace (W17)

Transport (W17)

Agriculture (W17)

Real Estate (W17)

Government (W17)

Nonprofit (W17)

Brex — W17's Defining Success

Brex, which rebuilt B2B financial products starting with corporate cards for startups, is the defining success story of the W17 batch. Co-founded by Henrique Dubugras and Pedro Franceschi, Brex achieved unicorn status faster than almost any company in YC history, reaching a $1B+ valuation within 2 years of demo day. By 2021, Brex was valued at over $12B. It remains one of the most valuable companies ever to emerge from a single YC batch.

Faire — The Wholesale Marketplace Giant

Faire, which built a marketplace empowering independent retailers to discover and order from independent brands risk-free (net-60 payment terms, free returns on first orders), grew to become the dominant wholesale marketplace for independent retail. Faire reached a $12.4B valuation in 2022, making W17 the rare batch with two companies exceeding $12B in valuation from the same cohort.

Retool — The Internal Tools Category Leader

Retool, which enables companies to build internal tools fast using a drag-and-drop interface connecting to any data source or API, became the category-defining product for internal tooling. The company grew to serve thousands of enterprises and raised significant capital, establishing itself as the standard tool for engineering teams building internal apps.

Indian Companies in W17

W17 had notable India-focused companies: Credy (full-stack lending for India), Bulk MRO Industrial Supply (B2B industrial supply marketplace in India, described as "Alibaba for enterprises in India"), Supr Daily (daily milk delivery, later acquired), Pulse (EMR for India, closed down), Wifi Dabba (wireless ISP in India), and Playment (enterprise data labeling, Indian team). This represented a meaningful early signal of Indian founder representation that has grown significantly in subsequent batches.

African Market Focus

W17 had an unusually high concentration of companies targeting African markets: Aella (lending in Nigeria), Buypower (electricity payments in Nigeria), Kudi (financial services across Africa), Reliance Health (healthcare in Africa), Tizeti (ISP for Africa), WaystoCap (B2B marketplace for Africa), Trade (African commodity exchange, closed), and Tress (social community for Black women, closed). This African cluster reflected YC's expanding international outreach in 2016-2017.

W17 represented a deliberate inflection point in YC's international strategy. Sam Altman's comment at demo day — "The international tour seemed to work" — reflected a multi-country recruiting effort that produced founders from 22 countries, the most in a single batch at that point.

The international thesis validated by W17:

Companies like Brex (Brazilian founders), Faire (Canadian and American founders building for US retail), Aella (Nigerian market), Reliance Health (African healthcare), and Supr Daily (Indian consumer) collectively demonstrated that world-class founders applying to YC were not concentrated in Silicon Valley or even in the US — they were globally distributed and building for globally distributed markets.

W17 also proved hard tech belongs in YC:

Companies like Solugen (biochemistry), BIOS (bionic device interfaces), Sinovia Technologies (OLED displays), AON3D (industrial 3D printing), Wright Electric (electric aircraft), and Volansi (aerial delivery) demonstrated that YC's model — 3-month intensive batch, small investment, demo day — could be applied to hardware and deeptech companies, not just software.