Sandbox Network

Slader

1.1 million+ crowd-sourced homework answers
A web-based platform for high school students to get step-by-step answers to all the homework problems in their math and science textbooks. Our collaborative platform allows users to write solutions and earn money. 1,100,000 answers and explanations already created ...

Disqus

The largest network of discussion communities in the world.
Disqus is a free service that enables great online communities. As the web’s most popular discussion system, Disqus is used by millions of websites that cover pretty much any topic imaginable. Our magic is in connecting people to stuff worth talking about. Explore ...

engageSimply

We created Programmatic Plus designed to put context back into digital marketing
EngageSimply's launched ProgrammaticPlus, the first comprehensive contextual marketing platform that restores context to the process of identifying, reaching, and cultivating the attention of customers. ProgrammaticPlus includes three powerful components available ...

Dine Market

Links the Foodservice Industry
Dine Market links buyers and sellers in the foodservice industry, it saves users time and money, benefiting from the “Wisdom of crowds.”

Forrst

Forrst is where developers and designers improve their craft & companies come to hire them
Forrst is an invitation-only community of developers and designers with a heavy emphasis on critique and quality feedback. The community of 40k+ is heavily engaged (~50% monthly actives - this is more than just logging in), and over 15k are waiting to get in.

StyleSays

Connecting individual clothing items to crowdsourced real-life contexts

plzadvize

Vertical Network for the Digital Marketing Industry
plzadvize is a trusted resource for digital marketers that provides tools and an engaged community to help simplify the marketing technology landscape empowering marketers to work smarter, not harder.

Accomplsh

For a more awesome you.
Accomplsh is a company dedicated to building the tools that help you to become the person you want to be. Starting with Accompl.sh, the online community dedicated to sharing your journey toward reaching your goals, Accomplsh as a company has expanded to include ...

PlayFitness

Interactive Motion Technology
Developing a new way to engage with kids in physical activities and education by using Microsoft Kinect motion sensitive technology to control avatar of Kids favorite cartoon character remotely in real time.

Cookapp

Eat at the chef's house
An online marketplace that enables people to book and attend food events hosted by chefs at their home or select venue. Book online through cookapp.com and book the go with our iphone app.

Beagle

A marketplace for sharing to-do's.
Beagle lets you make requests to people around you for things that you can't do or get yourself. Beagle is available in New York City and at the University of Maryland.

DUMBO Startup Lab

A playground for entrepreneurs, innovators and creatives
DUMBO Startup Lab is a community hub for entrepreneurs, creatives and innovators focused on tech & web development. We provide coworking space, networking and collaboration opportunities and host classes and events in our beautiful 2,900 sq. ft. corner loft. Our ...

Canvas

Outside.in

What Goes With This?

Online fashion community that crowdsources answers to a the question: What Goes With This?
What Goes With This? is an online fashion community. Our members ask and give answers to the common sartorial conundrum: What Goes With This? The product is a pivot from FitValet, which gained 4,000 customers but not fast enough growth. We found customers were ...

Kohort

For your groups.

Eventist

An events calendar with a Craigslist approach
Eventist is a free user-generated events calendar. Ad-free, intuitive, and organized. No registration is required to browse or create events. Featured events are available at affordable prices.

Food52

Helping people become better, smarter, happier cooks.

CloudPeeps

Talent marketplace for on-demand social media and community managers
CloudPeeps is a marketplace that connects social media and community managers with remote work opportunities. Customers (including startups, tech companies, professional services and agencies) use CloudPeeps to help build or manage their community – be it community ...

MatchPuppy

OkCupid for Dog Playdates
We’re a brand new way for dog owners and their dogs to meet new friends in their neighborhoods. Think of us as the OkCupid for dog playdates. Owners can arrange and join playdates, whether for finding matches for a quick stroll in the park or just meeting up with ...

The Community Manager

The Community Manager is the main source for all community management-related information.
The Community Manager is the main source for all community management-related information, including the latest news, case studies and reports.

Spoon University

Next gen food network — all the content is produced by college students (Techstars '15)
Contrary to popular belief, millennials care about food now more than ever. We created a platform that has mobilized, engaged and connected tens of thousands of students in a matter of months. Our website offers high-quality recipes, restaurant reviews and hangover ...

[email protected]

Building a student technology culture in NYC
[email protected] was created in Fall 2009 to connect technical and non-technical NYU students interested in building technology startups. Since them we've worked to offer resources, space, career opportunities and community to the NYU undergrad/graduate community, as ...

Squidoo

Publish & organize original, beautiful opinion articles.

Farmstand

Locally grown food at your fingertips.
Farmstand connects you with locally grown food. We’ve started with easy ways to discover and share the best of your local farmers’ market. Find markets in your area, share photos, post deals you’ve found, and help support your local community by telling everyone ...

Laugh-Track

Comedian profile network
Laugh Track is the online platform of comedy, built for comedians to build and share profiles, and for audiences to view, track and rate them. Laugh Track integrates content such as video, tweets, images and writing to help comedians broadcast their work and brand ...

tapbug

Social mobile apps for travelers

4chan

4chan is a simple image-based bulletin board where anyone can post comments and share images. There are boards dedicated to a variety of topics, from Japanese animation and culture to videogames, music, and photography. Users do not need to register an account ...

Puzzled.by

Community where people share their opinions on interesting topics. A Quora for polls
Puzzled.by is a community where real people share opinions in both a quantitative and qualitative way Puzzled.by lets people ask and answer quantitative questions. We help users make better decisions on a daily basis. whether they are testing an idea, seeking ...

OuterClub

Online lounge
OuterClub is a lounge for community chat & musings - all in real-time. We innovate chat and forums by providing a real-time community experience so that you can overhear and participate in conversations right as they happen. In essence, we are the next evolution ...

I'm In the Kitchen

Community for chefs and foodies
I'm In The Kitchen is a culinary community for chefs and foodies. We break down the walls of the kitchen and give you inside access of the happenings inside your favorite restaurants and into the minds of chefs. Chefs are able to connect with their diners and share ...

Forumatic

Managed Forum Hosting

Bandhub

Make Music Together
Our technology magically lets people make music together online, removing the barriers for the world's 500M recreational musicians to engage in social musical experiences.

Favorly

Like Kickstarter, but to raise human capital instead of cash
Favorly is like Kickstarter, but to raise human capital instead of money. Connect to and validate people & communities with the time, skills and interest to help your project.

SayWhat

Video Dictionary App
SayWhat is a video urban dictionary that lets you explain trending words and phrases like “killing it”, “bae”, and “chill” in 10-second videos. The videos help you keep up with the latest slang, or if English isn't your native language the educational app helps ...

SoupNextDoor

Marketplace for Unique Dining Experiences
SoupNextDoor is the marketplace for unique food experiences. We have professional chefs all over NYC that throw dinner parties and sell seats at their table using our service. It is like GrubWithUs but anyone can organize the events anywhere they want. We'll ...

ConnectFORE

Applied social network for golf: book a round and invite friends to join the round
ConnectFORE is a mobile application that lets golfers book a nine hole round of golf and invite friends and contacts from their social networks to join the round. It's free for golfers and courses pay ConnectFORE a share of the green fee. By focusing on nine ...

SOWGi

Social Support Network
In life, who do you turn to when you’re faced with one of life’s many challenges? And who turns to you? The answer is your “social support network,” usually consisting of friends, family, co-workers, or a professional who can help. SOWGI is a social network that ...

Blocvox

The easiest and most authentic way to keep in touch with groups and causes.
Blocvox lets social groups easily and fairly publicize their collective opinions in real-time. It's never been easier to combine your voice with others to reach the public and change the world. Not an activist? The Blocvox Front Page intelligently collates announcements ...

CoinClub.io

Bitcoin Marketplace
Bitcoin gate to mainstream markets

Parlor

Private members club
At 23 Billion dollars, the market for private clubs is substantial. However, this traditional industry is facing three major points of change: millennials are the largest consumer generation and are reaching an age when they join clubs, club consumers have higher ...

champd.com

Champd lets you find people around you to play against in the game or sport of your choosing. We keep track of all your wins and losses, and let you search for people of similar skill levels.

Clamour

Trustworthy Social Commerce
Clamour works with Facebook to create a marketplace with people in your community. With Clamour, you can easily search, buy, and sell items with your friends and neighbors.

Village Green

Entrepreneurs share resources to get their needs met
Village Green is a web application for entrepreneurs to get their needs met through sharing. The application enables entrepreneurs and innovators to post what needs they have, and what resources they have to share, so as to help all innovators use sharing as means ...

Momz Club

Social networking for mothers.
Social networking for Moms. Need a safe place to organize playdates, share stories, images, classifieds, and referrals with your closest mommy friends? Start a private moms club. Do you have questions about your baby's sleeping habits, breastfeeding, potty training, ...

Wavrr

The marketplace for amateur athletes
Wavrr is the marketplace for amateur athletes. Players can register to find teams and leagues, and teams can search to find players to fill their roster. And if you have a last minute dropout for your team, you can pull from a waiting list of ready players.

GoBoiano

Buzzfeed + LinkedIn for Anime
GoBoiano is an anime lifestyle brand that connects the global anime community through a vertical interest-based social network and integrated services. GoBoiano Media (http://media.goboiano.com/) launched July 16th as a working prototype and currently has over ...

InkedMatch.com

Socializing/Dating for the exploding tattoo market. SuicideGirls meets PlentyOfFish.
InkedMatch.com brings tattoo lovers together. They can create a free profile and start meeting other body art enthusiasts immediately. Nearly 40 percent of teens and 20-somethings have tattoos, according to a 2010 study by the Pew Research Center in Washington, ...

FunFitFun

SaaS + Marketplace for Fitness
Our flagship product allows fitness professionals to sell workout/instructional videos online. We enable professionals to expand their sales reach and provide a complimentary service to their existing clientele. Beyond video our software provides tools to help ...

Rootbuzz

Social Q&A Platform

TriB

Founder Bits

Angie's List for startups.
Founder Bits™ is a community driven directory of product information and reviews, aiming to help founders find the right products and services for their startup, whatever stage it is in.

Sprinkle-AI

Your product is great, but your marketing needs a little Sprinkle.
Growth utilities for b2b startup marketers. 

Petits Amis

Nationalized community-based animal care and support
Petits Amis LLC is a Pet Care Services company providing professional support for the lifestyles of busy or traveling individuals and families throughout New York State in the continuing care and maintenance of their pets with the potential and goal of capitalizing ...

Jackson Heights Mall

Online Community --> Virtual Mall --> Smart Physical Mall
Step 1: Online Community in the most diverse town of the most diverse borough of the most diverse city in the world.

Jinder

Jewish Community Platform
Jinder is a mobile platform for dating and sharing events within the Jewish community. Once registered through Facebook, the Jinder user will have access to the following 2 key functions: Dating: Using a fun, user friendly and powerful interface, the user can ...

SERENE Social

An International Wellness, Philanthropy & Conscious Networking Community for Women

Cartrdge

A community for the people making video game industry
Cartrdge is a community where the members of the video game industry can profile themselves, portfolio their work and connect with each other.  We're bringing the space together by making it easy for our users to sign up, share their work and skills, and give ...

Surpass the Limit

Group workouts in your community
It's difficult staying motivated when working out. We hope to change that. Our mission is to empower the world to surpass their limits to achieve anything. Our company runs small and personalized group fitness classes in Bayside, Queens. Our fitness consists of ...

SCENEPR!

Community for Startups

Cosplace

Instagram for the Cosplay Community
Cosplace is a community and mobile app for one of the most passionate 
and underserved groups on the Internet, Cosplayers. Cosplay is the practice of making and wearing costumes
from a character in comics, gaming, anime, movies, etc. Cosplace is being bootstrapped ...

HEB Holding International

Highly Profitable, Short-Term, Risk-Free Pre-IPO Investment
We, the 'Human Ecological Business Holding International Inc.' prepare the largest eco IPO ever. In the course of the preparation HEBHI offers a highly profitable, short-rerm, triple-hedged and buy-back guaranted private [eco] pre-IPO investment. Participants ...

Hagglys

Hagglys is your personalized service marketplace. We are like your service matchmaker.
In general terms, Hagglys is your personalized service marketplace. We are like your service matchmaker. For the consumer : Hagglys is your own custom catalog of personalized services. Find, customize and order specialized services unique to you wherever and whenever ...

FreeConvo

Real Life Facebook
FreeConvo provides a platform for people to connect in real life. Our customers are the general public. It helps bring people together from all walks of life.

Never Liked It Anyway

Ebay for Breakups
Never Liked It Anyway is an online marketplace to sell once-loved gifts from once-loved partners. It combines the functionality of eBay with the fascination of Texts From Last Night - and with a humorous, irreverent attitude. SInce launch (Dec 2011) the site has ...

Groupzz

Protecting your reputation
Groupzz is a new way to stay connected with your friends. It allow users to create specialized networks that gives you custom setting features and six personalized groups to stay connected with individuals in a private seamless way. Creating a profile will be ...

WireBig

Networking Venue
Wirebig is a group networking platform, a disruptive way of making the most beneficial networking connections in online communities and gatherings. Homepage for organizing online events and networking all participants before live gatherings such as conferences ...

Go Do!

Hands-on Experiential Learning Opportunities for Youth
Go Do! exists as both a youth development organization AND a social movement. We're inspiring a generation to "go do." We know that youth learn best through authentic, hands-on experiences versus those of the vicarious nature. We've made it our mission to create, ...

Founders Under 40™ Group

group
Founders Under 40™ , also know as FU40, FU40 Group, as many of you know is the fastest growing group for founders around the world. A group community that allows business minds to connect and share. Thanks to the members of this impressive group. Our mission & ...

LittleBoards

Rethinking forums on mobile
LittleBoards is a new mobile platform that's rethinking the forum in a mobile-first world. 

Create for a Cause

eHarmony meets MeetUp for non-profits and creatives.
Create for a Cause is a social platform that connects creatives and non-profits to create things that truly matter. In a platform that resembles eHarmony and MeetUp, Create for a Cause strives to bring together a collaborative community of talented individuals ...

Woozy

Waze for nightlife
Allow people to take back control of their nights out. Build a community of weekend warriors who send live reports about relevant nightlife. Real-time-reporting about what matters most to millennials: where the best party is.

CoInvent

A Global Startup Community
CoInvent is a US-based event/content platform for startups and entrepreneurs, with an array of events from monthly happy hour mixers to annual startup conferences. CoInvent is an indispensable enabler for building a highly efficient global startup community where ...

Jeito

Apartment Reviews for Renters by Renters.
Yelp for Real Estate

ClearDigs

Social Network for NYC Real Estate
ClearDigs is a social search portal for NYC real estate rentals, where current tenants get paid to list their apartment before moving out, and everyone can search for new apartments ahead of the market