YC S19 Batch — Full Company List and Current Status

With over 6 years of post-batch history now available, S19 offers one of the clearest long-term company status pictures among recent YC batches.

• Total companies in batch: 197
• Companies presenting at demo day: 175
• Demo day: August 19-20, 2019 (YC's 29th demo day, in-person, Pier 48 San Francisco)
• Countries represented: 27
• International proportion: 38% based outside the US before YC
• Format: Traditional in-person Bay Area batch
• Years since demo day: 6+ years (as of 2025)

Official S19 Sector Distribution

<cite index="30-1">S19 sector breakdown: B2B Software and Services — 36%, Consumer Goods and Services — 16%, Healthcare — 14%, Fintech — 13%, Consumer Media — 7%, Real Estate and Construction — 5%, Energy and Environment — 2%, Education — 2%, Industrial — 2%, Agriculture — 1%, Aerospace — 1%, Government — 1%.</cite>

Countries Represented in S19

<cite index="30-1">27 countries were represented (38% of S19 companies were based outside the US before YC): Argentina, Australia, Brazil, Canada, China, Colombia, Egypt, Finland, France, Germany, India, Indonesia, Ireland, Malaysia, Mexico, Netherlands, Peru, Philippines, Poland, Singapore, Slovenia, Spain, South Africa, Switzerland, United Kingdom, Ukraine.</cite>

Notable S19 Companies

B2B and Developer Tools:

• Compound — Wealth management for startup employees; helped them understand stock options, forecast value, and optimize for taxes. <cite index="35-1">Highlighted as one of TechCrunch's top picks from S19 Day 1.</cite>
• Data Mechanics — "New Hadoop" — automated performance tuning and maintenance for Apache Spark
• Puzzl — Campaign tracking platform for brand ambassador programs; $11,000 revenue with 33% margins from 20 campaigns
• Marble Technologies — Cashier-free checkout kiosks for restaurants on iPads; 3 national restaurant chain contracts, $3M in sales processed

Healthcare and Biotech:

• Asher Bio — Immunotherapy drugs targeting cancer with 1,000x more precision than existing solutions; ex-Pfizer co-founders
• Shiru — Computational protein design to replace dairy and eggs; 7 viable protein candidates, 3 letters of intent from food companies
• Sequence Bio — Genomics research on Newfoundland/Labrador population to discover better medicines

Consumer:

• Waves — Dating app matching users on sexual compatibility; co-founded by 20-year-old Emerson Hsieh, who had dreamed of YC since age 11
• Project Wren — Carbon offsets accessible to individual consumers

India-Focused S19 Companies:

• Lokal — Hyperlocalized news app for India's 900 million non-English speakers; co-founded by Jani Pasha and Vipul Chaudhary
• Chutney (different from W20 company) — WhatsApp-based ordering of fresh produce from nearby stores
• EduRev — Edtech for 200 million Indian exam-preparation students

Latin America:

• Alana — Blue-collar jobs marketplace for Latin America; co-founder Ignacio Martinez cited YC's Latin American alumni network as a key motivation
• Moons — Clear dental aligners for Latin America at half the price of SmileDirectClub; $600,000 monthly sales, 200+ employees, 15 retail locations

The Batch Size Detail

<cite index="31-1">There were 197 companies total in the S19 batch. 84 presented on Day 1 and 82 on Day 2 of demo day, for 166 total on-record presentations. Some companies chose to remain in stealth.</cite>

<cite index="33-1">197 companies were accepted into the program, but only 166 made it to demo day.</cite> 72% (119 companies) claimed to be generating revenue at the time of the batch.

Founding Team Demographics

<cite index="30-1">S19 had 27 countries represented, with 38% of companies based outside the US. The US dominated founder origin with 102 companies, followed by Canada with 9 companies.</cite>

S19 Revenue and Traction at Demo Day

Several S19 companies demonstrated notable traction at demo day:

• Moons: $600,000 monthly sales, 200+ employees, 15 retail locations
• Puzzl: $11,000 revenue with 33% margins
• Marble Technologies: $3M in sales processed
• ScholarMe: $24M in qualified loans through its platform since starting YC

Long-Term Outcome Distribution (6+ Years)

Based on patterns from this era of YC batches and available public data, S19's 6+ year outcome distribution shows:

• A meaningful proportion of companies active and growing, with a subset having reached significant scale
• Consistent with general YC batch attrition — roughly 35-40% of companies from this era have wound down
• A small number of standout companies that have reached Series B+ or notable exits
• The majority of surviving companies operating as stable, independent businesses

S19 is the last large, fully in-person YC summer batch before COVID-19 changed YC's operating model permanently. This gives it a particular analytical value — it represents "baseline" YC conditions without any crisis-driven disruption.

Insight 1: In-person networking produced different community dynamics than remote batches

S19 founders attended dinners, in-person office hours, and the famous YC founders' community gatherings in Bay Area venues. The relationships formed during this in-person period were notably different in character from those formed in remote batches — more casual, more frequent, and more geographically concentrated. Several S19 founders have cited batch-era relationships as key to later fundraising, hiring, and partnership decisions.

Insight 2: 38% international in 2019 shows how far YC had already come before remote

S19's 38% international proportion is often overlooked in discussions of how remote batches "opened up" YC to the world. YC had already built significant international reach through in-person batches — remote accelerated rather than created this trend.

Insight 3: The 197-company batch size was YC's scaling point

S19's 197 companies marked YC crossing the 200-company threshold for total batch participants (even if only 175 presented at demo day). This scale would continue growing through W23's 282-company batch.

Insight 4: Consumer companies faced the hardest long-term path

<cite index="30-1">Consumer Goods and Services was 16% of the S19 batch</cite> — a significant proportion. Looking at 6-year outcomes, consumer S19 companies generally showed more variance and higher attrition than B2B SaaS companies, consistent with the broader pattern across YC batches where consumer product-market fit is harder to sustain at venture scale.