This guest post comes from Mark O’Neill. Mark is a frequent speaker and blogger on APIs and security, and is CTO at Vordel. Vordel, recently acquired by Axway, provides an API Server that enables enterprises to connect to Cloud and Mobile. Web APIs are now widely used for Integration, especially to enable mobile applications. APIs divide broadly into two categories: Open APIs and Enterprise APIs.
![Comparing Open and Enterprise APIs](https://cdn-ak-scissors.b.st-hatena.com/image/square/81c8bb548a7db8069cb0ebc17e42344bed47acae/height=288;version=1;width=512/https%3A%2F%2Fwww.programmableweb.com%2Fsites%2Fdefault%2Ffiles%2Fstyles%2Ffacebook_scale_height_200%2Fpublic%2F2013-01-21-03.40.37-pm-150x47.png%3Fitok%3D--Nhcw9p)