πŸš€ Y Combinator×❄️ Winter 2011

YC Winter 2011: The Infrastructure and Mobile Migration Wave

44 startups in this batch

What Was YC WINTER 2011?

In early 2011, the mobile revolution was hitting its stride and the cloud wars were just beginning. This cohort was defined by the transition from legacy desktop software to mobile-first experiences and the urgent need for developer-centric infrastructure to support a rapidly scaling internet.

What These 44 Startups Built and Proved

The batch focused heavily on cross-platform development and marketplace infrastructure, proving that businesses were desperate to bridge the gap between iOS and Android. They validated that API-first companies like Balanced could capture massive value by solving complex regulatory and payment hurdles for the emerging gig economy.

What Failed and What to Learn From It

Many struggled because they built heavy middleware or manual porting tools that were eventually Sherlocked by native platform improvements. The lesson is that pure-play utility tools without a proprietary data moat or network effect are vulnerable to platform shifts and commoditization.

The Relaunch Opportunity in 2026

A solo builder can now use LLM-driven code translation to resurrect the "Apportable" dream, instantly porting complex legacy codebases across any framework. The wedge today isn't just cross-platform compatibility, but AI-automated maintenance of these fragmented systems at zero marginal cost.

AcunoteYC

active

No description available

πŸ“ San FranciscoπŸ“… 2012

AppHarborYC

shutdown

.NET Cloud Platform as a Service

πŸ“ San FranciscoπŸ“… 2012

ApportableYC

acquired

iOS porting

πŸ“ San FranciscoπŸ“… 2012

AssembledYC

shutdown

Pivoted to TenXList, a professional network of top college engineers.

πŸ“ Palo AltoπŸ“… 2012

BalancedYC

shutdown

Payments for Marketplaces

πŸ“ San FranciscoπŸ“… 2012

BeetailerYC

shutdown

Facebook stores.

πŸ“ Mountain ViewπŸ“… 2012

CloseYC

active

CRM and sales automation tools for startups and SMBs

πŸ“ RemoteπŸ“… 2012

ComprehendYC

acquired

SaaS to increase speed and quality of clinical trials.

πŸ“ Redwood CityπŸ“… 2012

ConvoreYC

shutdown

Hosted IRC and so much more.

πŸ“ San FranciscoπŸ“… 2012

CustoraYC

acquired

Custora is a predictive analytics platform for e-commerce marketing…

πŸ“ New YorkπŸ“… 2012

DrChronoYC

acquired

The essential platform for modern medical practices and patients.

πŸ“ CAπŸ“… 2012

EarbitsYC

acquired

Google AdWords for music. Allowing bands and labels to bid for…

πŸ“ Los AngelesπŸ“… 2012

FitFuYC

shutdown

New projects

πŸ“ RingwoodπŸ“… 2012

FivestarsYC

acquired

Customer loyalty and payments platform for small businesses.

πŸ“ San FranciscoπŸ“… 2012

FlotypeYC

shutdown

Third generation of web apps.

πŸ“ San JoseπŸ“… 2012

Platform for the greatest products from the past, present and future.

πŸ“ Los AngelesπŸ“… 2012

HelloSignYC

acquired

eSignature software for small and mid-market businesses.

πŸ“ San FranciscoπŸ“… 2012

HotspotsYC

acquired

Real-time analytics (acq by TWTR, 2012)

πŸ“ San FranciscoπŸ“… 2012

Pay what you want for awesome games and other content while giving to…

πŸ“ San FranciscoπŸ“… 2012

HyperinkYC

shutdown

Ebook publisher.

πŸ“ San FranciscoπŸ“… 2012

InporiaYC

shutdown

Fashion shopping email list.

πŸ“ San FranciscoπŸ“… 2012

Turning PhDs & engineers into data scientists & data engineers

πŸ“ Palo AltoπŸ“… 2012

Custom-made artwork from artists e-commerce marketplace.

πŸ“ San FranciscoπŸ“… 2012

LanyrdYC

acquired

IMDB of conferences.

πŸ“ LondonπŸ“… 2012

MailgunYC

acquired

Email API service.

πŸ“ San FranciscoπŸ“… 2012

Mobile games company

πŸ“ MontrealπŸ“… 2012

OrderAheadYC

acquired

Order ahead for pickup

πŸ“ San FranciscoπŸ“… 2012

PebbleYC

acquired

Watch that helps you get shit done and limit the mayhem of…

πŸ“ Palo AltoπŸ“… 2012

SendoidYC

acquired

High speed peer to peer data transport technology for consumers…

πŸ“ San FranciscoπŸ“… 2012

SiastoYC

shutdown

Siasto is a collaboration tool designed for SMBs who use Google Apps,…

πŸ“ San FranciscoπŸ“… 2012

Web-based platform for creating customized mockup images and automating Etsy listing uploads for print-on-demand sellers.

The cloud-native, operational database built for speed and scale.

πŸ“ San FranciscoπŸ“… 2012

Record your family stories and print them in beautiful keepsake books.

πŸ“ KailuaπŸ“… 2012

Online store referrals.

πŸ“ San FranciscoπŸ“… 2012

TalkBinYC

acquired

Consumer to business messaging.

πŸ“ Mountain ViewπŸ“… 2012

TellFiYC

shutdown

Google Voice for business.

πŸ“ San FranciscoπŸ“… 2012

How businesses send money to people at scale. Fast, free, global.

πŸ“ RemoteπŸ“… 2012

TrustEggYC

shutdown

Trust funds.

πŸ“ Culver CityπŸ“… 2012

TumultYC

active

Tumult is building the next generation of apps for web design. Our…

πŸ“ San FranciscoπŸ“… 2012

TutorspreeYC

shutdown

Online tutoring marketplace.

πŸ“ ChicagoπŸ“… 2012

UpverterYC

acquired

The future of hardware design. A marketplace for hardware engineering…

πŸ“ TorontoπŸ“… 2012

UserfoxYC

shutdown

User retention as a service. Drip email

πŸ“ San FranciscoπŸ“… 2012

Venue marketplace.

πŸ“ San FranciscoπŸ“… 2012

All-in-one apartment Marketing Platform for brokerages and landlords.

πŸ“ RemoteπŸ“… 2012