If you are looking for the highest quality lessons and materials online, the paid services will do the trick. Here are a list of paid Arabic services and lessons that will help you in your path to Arabic fluency.
Arab Academy – Online courses with face to face language instruction. Plans are flexible: monthly, quarterly or semi-annually.
Rocket Languages – Very highly rated system. Offers multiple payment plans, including a lifetime 1x payment, or a monthly fee. Huge database and tutoring support. You can try it out for free before you purchase.
ArabicPod101 – One of the smoothest websites out there. Mountains of materials. Different plans based on your needs – from a basic free account with the podcast, to a comprehensive system involving tutors.
Nassra Arabic Method – Comprehensive system for learning spoken Arabic. Can pay monthly or annually. VIP membership has a lot of additional add-ons. They have some inspiring customer testimonials on their website from students that have studied for only 6 months.
Arabic Online – Suitable for beginners and more advanced learners.
Rosetta Stone – Quality lessons and a top-notch interface.
Pimsleur – They claim that their method is scientifically proven to get you results.
Living Language – Interactive professional course, with a variety of platforms.
Busuu – This interactive platform offers a premium upgrade which enhances and expands the lessons. A fun and colorful approach, also keeps track of your statistics and language needs.
In addition, check out the Arabic Tutors page to a hire a personal online tutor.