SBatch S21

YC S21 Companies

478 Y Combinator S21 startups with verified founder contacts, company status, and team data.

478

Companies

Summer

Season

2021

Year

YC Company Directory

50 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
Odys Aviation	S21	Vertical takeoff and landing aircraft for major airlines	Active	Los Angeles, CA, USA	11	James Dorris, Axel Radermacher	Reveal
Odys Aviation	S21	Vertical takeoff and landing aircraft for major airlines	Active	Los Angeles, CA, USA	11	James Dorris, Axel Radermacher	Reveal
Onebrief	S21	Onebrief makes military headquarters run seamlessly	Active	Honolulu, HI, USA; Remote	200	Grant Demaree, Rafa Pereira	Reveal
OneSchema	S21	Automate CSV & PDF workflows with AI	Active	San Francisco, CA, USA	25	Andrew Luo	Reveal
OneSchema	S21	AI Agents for Data Operations	Active	San Francisco, CA, USA	20	Andrew Luo	Reveal
OneStopKitchen	S21	AI-Driven Tech & Space Optimization to Scale Restaurants	Inactive	San Francisco, CA, USA	10	Vijayaraj Gopinath, Viggnesh Kandasamy	Reveal
Onsite Pro	S21	Revolutionizing digital selling within HVAC	Inactive	San Francisco, CA, USA	4	Sam Steyer, Gautam Jayaraman	Reveal
Openlayer	S21	The fastest way to ship airtight AI	Active	San Francisco, CA, USA	24	Gabriel Bayomi Kalejaiye, Vikas Nair, Rishab Ramanathan, Gabriel Bayomi	Reveal
Opkit	S21	AI phone calls for the US healthcare industry	Inactive	New York City, NY, USA; New York, NY, USA	—	Sherwood Callaway, Justin Ko	Reveal
Orderli	S21	Square for Europe	Active	Utrecht, Netherlands	6	Dorus van den Oord, Maurits Franken	Reveal
Orderli	S21	Square for Europe	Active	Utrecht, UT, Netherlands; Amsterdam, NH, Netherlands	6	Dorus van den Oord, Maurits Franken, Dorus van den Oord	Reveal
outloud.ai	S21	Building Gong.io for offline retail.	Active	Miami, FL, USA	5	Sasha Miagkyi, Igor Shelvinskyi	Reveal
outloud.ai	S21	Building Gong.io for offline retail.	Inactive	Miami, FL, USA; Remote	5	Sasha Miagkyi, Igor Shelvinskyi	Reveal
Pactima	S21	Live video signing for real-time agreements	Acquired	Ottawa, ON, Canada; Remote	3	Moktar Yusuf, Joel Kapongo	Reveal
Palenca	S21	Payroll API for LatAm	Active	São Paulo, State of São Paulo, Brazil	25	José Carlos Aguilar, Antoine Nguyen Hong Duc	Reveal
PaletteHQ	S21	Manage sales commissions and sales performance	Active	Paris, Île-de-France, France; Remote	14	Jean-Edern Lorillon	Reveal
PaletteHQ	S21	Manage sales commissions and sales performance	Active	Paris, France	14	Jean-Edern Lorillon	Reveal
Palla	S21	P2P Cross border payments	Active	Remote	22	Enrique Perezalonso, Andrew Mason	Reveal
Palla	S21	P2P Cross border payments	Active	—	22	Enrique Perezalonso, Andrew Mason	Reveal
Pandai	S21	Learning app for school students in Southeast Asia	Active	Kuala Lumpur, Federal Territory of Kuala Lumpur, Malaysia	32	Khairul Anwar Mohamad Zaki, Akmal Akhpah, Suhaimi Ramly	Reveal
Pandai	S21	Learning app for school students in Southeast Asia	Active	Kuala Lumpur, Federal Territory of Kuala Lumpur, Malaysia	32	Khairul Anwar Mohamad Zaki, Akmal Akhpah, Suhaimi Ramly	Reveal
Parallel Bio	S21	Using the immune system to cure disease	Active	San Francisco, CA, USA	20	Robert DiFazio, Juliana Hilliard	Reveal
Patterns	S21	Next-Gen Financial Analysis and Reporting with AI Agents	Inactive	San Francisco, CA, USA	2	Ken Van Haren, Chris Stanley	Reveal
Payflow	S21	A mobile app. It allows employees to get paid their salary on-demand.	Active	Madrid, Community of Madrid, Spain	50	Avinash Sukhwai, Benoit Menardo	Reveal
PAYZE	S21	Stripe for former Soviet Union countries	Active	Tbilisi, Georgia	4	Gega Tsurtsumia	Reveal
Perfekto	S21	Grocery subscription service against food waste in Latam	Inactive	Mexico City, CDMX, Mexico	33	Anahí Sosa, Jan Heinvirta, Anahí Sosa Padilla	Reveal
Phykos	S21	Growing seaweed to stabilize the climate.	Active	San Francisco, CA, USA	2	Nico Julian, Jeff Zerger	Reveal
Pideaky	S21	We help offline LatAm SMBs manage and accelerate their cash-flow	Active	Monterrey, N.L., Mexico	3	Carlos Tejeda, Oscar Rydberg, Rafael Tejeda Elizondo	Reveal
Pideaky	S21	We help offline LatAm SMBs manage and accelerate their cash-flow	Active	Monterrey, Nuevo Leon, Mexico	3	Carlos Tejeda, Oscar Rydberg, Rafael Tejeda Elizondo	Reveal
Pide Directo	S21	One-stop-shop for restaurants to operate and grow their business.	Active	Monterrey, N.L., Mexico	150	Hussein Fawzi, Antonio Nacoud, Ronni Samir Sulaka, Anders Steiner	Reveal
Pillar	S21	A white-label care enablement platform	Active	New York City, NY, USA; Remote	5	Jasmine Mansouri, Caroline Early	Reveal
Pipekit	S21	Pipekit scales data & CI pipelines for enterprises	Active	—	9	Caelan Urquhart, J.P. Zivalich	Reveal
Pirouette Pharma	S21	We make injections as easy as pushing a button!	Active	Boston, MA, USA	9	Conor Cullinane, Matthew Kane, Elijah Kapas	Reveal
Plai	S21	Create, launch, and optimize Facebook ads and ads on 10+ platforms	Active	Los Angeles, CA, USA	20	Logan Welbaum	Reveal
Plai	S21	Create, launch, and optimize Facebook ads and ads on 10+ platforms	Active	Los Angeles, CA, USA; Remote	20	Logan Welbaum	Reveal
Planet A Foods	S21	Building the next generation food ingredient champion.	Active	Munich, BY, Germany	6	Maximilian Marquart, Sara Marquart, Dr. Maximilian Marquart	Reveal
Pluggy	S21	Plaid for Brazil: we allow developers to access users' financial data	Active	São Paulo, SP, Brazil; Remote	31	Rogerio Correa, Victor Braga, Bruno Loiola, Federico Miras, Gabriel Pan Gantes	Reveal
Portão 3	S21	We are the frictionless way for companies to make payments.	Active	Uberlândia, MG, Brazil	40	Fernando Nery	Reveal
Positional	S21	A modern platform for content marketing & SEO.	Acquired	Charleston, SC, USA	5	Matthew Lenhard	Reveal
Positional	S21	A modern platform for content marketing & SEO.	Acquired	Charleston, SC, USA; Hoboken, NJ, USA	5	Matthew Lenhard, Matt Lenhard	Reveal
Potion	S21	AI for product formulation	Active	San Francisco, CA, USA	7	Yahya Syed, Hejab Malik, Alex Stec	Reveal
Promakhos Therapeutics	S21	A therapeutics platform for curing inflammatory disorders	Active	Boston, MA, USA	2	Katerina Chatzi, Jasper Edgar Neggers	Reveal
Promakhos Therapeutics	S21	A therapeutics platform for curing inflammatory disorders	Active	Boston, MA, USA	2	Katerina Chatzi, Jasper Edgar Neggers	Reveal
PropReturns	S21	End-to-end commercial real estate transaction platform	Active	Mumbai, Maharashtra, India	40	Jayant Panwar, Somil Mathur, Kenish Shah	Reveal
Protex AI	S21	Computer vision that makes the industrial workplace, safer	Active	Limerick, Ireland	5	Dan Hobbs, Ciarán O'Mara	Reveal
Protex AI	S21	Computer vision that makes the industrial workplace, safer	Active	Limerick, County Limerick, Ireland	5	Dan Hobbs, Ciarán O'Mara, Ciaran O'Mara	Reveal
Pylon	S21	Infrastructure management software for water & electricity companies	Active	Cairo, Cairo Governorate, Egypt	72	Ahmed Ashour, Omar Radi	Reveal
Quest	S21	Audio career advice	Inactive	Amsterdam, Netherlands	5	Robert Gaal, Emiel van Liere	Reveal
Redbean	S21	Make games and stories with AI	Active	Singapore	6	Viet Long Tran	Reveal
Reframe	S21	App to help people quit or cut back on alcohol use	Active	Atlanta, GA, USA	35	Vedant Pradeep, Ziyi Gao	Reveal