Freelancers are generating over $1.8 billion on oDesk, Elance and Freelancer and 99designs alone. Online global outsourcing is growing at a rapid pace with a projected growth of over 40% . Freelancing is a great alternative for full-time employees. It saves businesses  the cost of hiring  employees and it offers freelancers the flexibility and independence to work from anywhere.
According to Elance, “The staffing industry is ripe for disruption and the fundamental drivers of online work’s growth – instant access to high quality talent, speed of hiring and cost savings – align with business needs of all sizes.
This infographic compares the the biggest freelancing sites, funding received, number of freelancers and jobs posted, percentage charges and cumulative earnings of freelancers on the biggest freelancing sites.

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Thomas Oppong is the founder @Alltopstartups.