Y Combinator shows off 39 companies at Demo Day

Y Combinator’s semi-annual Demo Day is taking place today, and 66 companies are pitching their products at the Computer History Museum in Mountain View, California. Twenty seven of the presenting companies are still in stealth mode.

Twice a year, the incubator grabs the entrepreneurs from its three-month program and throws them onstage to present before Silicon Valley investors and press. Each company generally gets a $5,000 base amount and $5,000 per-founder from Y Combinator to help it get up and running. It’s then up to each startup to raise additional funding from angel and venture capital investors.  Some notable Y Combinator alumni include Hipmunk, Scribd, Rapportive, Airbnb, Dropbox, OMGPOP, and Reddit.

We’ll be reporting on the presentations all day. Below is a list of the 39 companies that are presenting, not including those that are still in stealth mode and presenting off the record.

We’ll update you with more details on the most promising companies as the day goes on.

PlanGrid: Blueprints for tablets.

There was once a time when blueprints existed as big spools of paper, spread out across an architect’s desk. Despite computer-aided design, architects on the job still lug that paper around. PlanGrid is making the obvious and needed move to bring those paper plans to the iPad. Read more…

Medigram: Chat for doctors.

Zillabyte: Palantir for salespeople.

HireArt: Employee agency 2.0.

Flutter: Gesture controls for webcams.

You’re jamming out to your favorite track on Spotify, and then all of a sudden a song that makes your want to scream starts playing. Instead of running over to your computer and frantically pressing keys and clicking at your screen to make the madness end, Flutter lets you wave at your webcam to change the track. Read more…

Givespark: Celebrity fundraising.

Celebrity investors aren’t unheard of with Justin Timberlake, Ashton Kutcher, Selena Gomez, Lady Gaga, and a number of others all throwing money into hot startups. But what if we took advantage of their influence to promote crowdfunding? That’s what Givespark hopes to do. Read more…

Popset: Group photo albums.

SendHub: SMS for organizers.

Screenleap: Screen sharing.

Coderwall: Quantified resumes for software developers.

This startup creates resumes for coders and developers that show off how great they are at the jobs they already have. Using a gamification platform, developers can earn badges for projects they accomplish and skills they’ve obtained, also know as “geek cred.” Read more…

LVL6: Social mobile games.

Midnox: Video camera app and hosting.

42Floors: Commercial real estate search.

42Floors is breaking into the commercial real estate world, helping new tenants find office spaces in an otherwise broker-run industry. “This process is really broken,” said 42Floors co-founder Jason Freedman. “We have the determination and the talent … we’re going to go out and build a big company.” Read more…

Sonalight: Voice texting for drivers.

Apple’s virtual-assistant Siri isn’t available on Android phones, so copycat apps are popping up all over the Android Marketplace. Sonalight, however, promises to not just be another voice-activated assistant app, but rather a life-saving voice-activated assistant app. Read more…

Your Mechanic: Airbnb for car repair.

Crowdtilt: Kickstarter for groups.

Crowdtilt takes the messy pot of money you and your friends are pooling for a group vacation to Vegas and moved it online. The company does crowdfunding for small groups of people who already know each other; friends and family looking to throw their money together for a common reason. Read more…

Flypad: Smartphone as game controller.

Carsabi: Used car search.

AnyPerk: Discounts as employee benefits.

TiKL: A walkie-talkie app.

Where much of technology tries to push new ideas into the hands of consumers, TiKL is putting an old stand-by on smartphones: the walkie-talkie. Read more…

Dealupa: Deal aggregator.

Priceonomics: Price guides for everything.

Following in the footsteps of FindTheBest, Priceonomics searches for prices on consumer goods. Essentially  for everything you’d want to buy, Priceonomics wants to be the service to tell you how much it will cost you. Read more…

Kyte: Turns any Android phone into a kids’ phone.

The problem with kids these days… is actually a problem with smartphones. Parents are hard-pressed to find a safe way to send kids off to school with the gadgets they crave. Kyte, however, believes it has found a solution for Android phones. Read more…

EveryArt: Commissioned art marketplace.

Shoptiques: Online aggregator for real-world retail boutique shops.

Boutiques are the last type of store you’d expect to get technical, but Shoptiques co-founder Olga Vidisheva is confident she can bring the tiny shops to your digital doorstep. Vidisheva believes her product gives boutiques a way to show off their clothing and reach their loyal customers who may not live in the area. Read more…

Pair: Messaging for couples.

If your friends are sick seeing of lovey-dovey status updates meant only for your significant other on Facebook and Twitter, it might be time to take your love to a private social network, such as Pair. Read more…

Daily Muse: Lets users discover “inspired places to work.”

AnyVivo: A marketplace for living things.

Per Vices: Software-defined radio.

iCracked: Tablet repair network.

Socialcam: Video sharing.

HackPad: Real-time wiki.

Creating and managing a wiki can take work. It requires a special syntax to format your text and build out the wiki how you’d like it. Hackpad is trying to make the wiki fresh with real-time updating and no special text editor. Read more…

FamilyLeaf: Facebook for families.

There are social networks for friends, social networks for work, even social networks for relationships. FamilyTree wants to make a social network for the family. Read more…

Ark: People search.

There a new search engine in town to freak out about: Ark, a “people” search engine which scrapes social networks to compile its own profile of you. Read more…

Chute: Images and videos as a service.

Minefold: Multiplayer game hosting.

Exec: Uber for errands and tasks.

99dresses: Women trade clothes.

99Dresses co-founder Nikki Durkin describes her company as an enabler to one of the world’s most powerful drugs: shopping. The company allows women to upload items of clothing onto the website, rate its quality, and then assign a price to it. Read more…

MatterPort: 3D scanning.

3D printing is turning heads these days, especially with the do-it-yourselfers. Before you can print something in 3D, you first have to give the printer a 3D model to use as a reference. Matterport has a small scanner that can help. Read more…

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