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The hottest ticket in town for young start-ups is TechStars NY, an accelerator which wrapped up its inaugural class with a demo day at Webster Hall that packed the house with a who's who of East Coast investors. Today Techstar's NY announced its second class, which is slightly larger than the first, more experienced, and features a much higher percentage of Silicon Alley companies.

There are twelve companies in the new class and all but three were founded in New York City. Two start-ups are out of Philly, CourseKit and Want Worthy, but Coursekit just raised $1 million and moved to the Big Apple. The third out-of-towner is Zferral, a platform for driving social referrals.

"I think there was definitely a strong network effect, and that's why you are seeing so many more local companies in this class," says Managing Director David Tisch. "A lot of these were companies we were able to meet and watch over the past months, which gave us confidence there was more than just talk to their pitches."

As for the companies being more fully formed than the first class, Mr. Tisch says that may change the dynamic of the program. "Last time we had four or five companies change over the course of the three months. It's harder to see the natural pivots for a lot of these start-up."

TechStars NY has also added on a number of new mentors including Partick Keane, Laural Touby, Mark Suster and Andy Weissman, who admitted at demo day that he encouraged TechStars standout OnSwipe not to join when he first heard of the program, but had completely changed his mind after watching them grow.

Here are the members of the new class is alphabetical order.

Arootz - NY, NY - Marketplace for Authentic Experiences

Chat id - Florida; UK; Pakistan - Unified Chat Platform for Businesses

Contently - NY, NY (via Idaho) - Marketplace for Professional Content

CourseKit - Philadelphia, PA - Social Learning Management Software

Dispatch.io - NY, NY; Florida - Cloud Sharing, Movement, and Management Service

Fred Rover - NY, NY - Web and Mobile App Discovery

Ordr.in - Brooklyn, NY - API for Food Service Industry

Piictu - NY, NY (via Caracas, Venezuela) - Mobile Photo Meme Game

TimeStream (Spontaneously) - NY, NY - Social Calendar and Discovery Platform

Urtak - NY, NY - Publisher Polling Tool to Increase Engagement

Wantworthy - Philadelphia, PA - Brand for Discovering and Sharing Women’s Fashion

Zferral - Detroit, MI - Social Referral Platform