The Leaders Matrix leverages proprietary research and methodology to identify top services firms and map their capabilities. Companies are plotted on the matrix based on their proven ability to deliver and focus on a service type. Bubble size indicates relative size of the firms. Source: http://www.sourcingline.com/

1. Top App
Developers
Application Development
Companies in United
States, UK, New York City
Source: http://www.sourcingline.com/

2. Top App Developers for
iPhone
 WillowTree®
Apps, Inc
Founded in 2007, WillowTree Apps Inc. has
developed over 180 apps across the major
platforms, including iOS (iPhone and iPad),
Android (phone and tablet), Desktop and
Mobile Web (HTML5/CSS3), and Windows
Phone.

3. Top App Developers for
iPhone
 Sourcebits
Based in San Francisco, California, and backed
by Sequoia Capital and IDG Ventures, we've
delivered more than 500 projects since 2006 Our
team of more than 400 full time employees has
executed over 500 successful mobile, web, and
cloud solutions on platforms including, iOS,
Android, Blackberry, Symbian, and WinPhone—
with more than 20 apps reaching the top ten in
their genres in global app stores.

4. Top App Developers for
iPhone
 OpenXcell
OpenXcell is an ISO 9001: 2008 certified
company, Magento solution partner and a
Drupal Acquia partner company. We have
experience of developing "iTunes Top 10 Apps"
like TOP Files, PianoPass and Top eCommerce
Store like Yuvastyle. With a team of 100+ highly
experienced developers, we have been able to
serve many leading brands.

5. Top App Developers for
iPhone
 Cygnis
Media
Cygnis Media promotes your message over
the internet by utilizing the best possible
channels, whether they are Facebook
applications, social profiles, viral
videos, mobile applications, newsletters or
more. Cygnis Media will help you open a
channel of communication between you
and your consumers.

6. Top App Developers for
iPhone
 Mubaloo
Mubaloo is the UK’s leading consumer and
enterprise app development company.
Mubaloo is an award-winning team of mobile
consultants and mobile app development
experts. Founded in 2009 by Mark
Mason, Mubaloo's in-house team of
planners, project
managers, developers, designers and testers
have delivered over 160 mobile apps for a
diverse range of clients across a number of
industry sectors.

7. Thank You