Amazon EC2 Spot instances allow you to bid on spare Amazon EC2 computing capacity. Since Spot instances are often available at a discount compared to On-Demand pricing, you can significantly reduce the cost of running your applications, grow your application’s compute capacity and throughput for the same budget, and enable new types of cloud computing applications.
Spot instances run when your bid price exceeds the Spot price, and provide the reliability, security, performance, control, and elasticity of Amazon EC2, at low market-driven prices.
Reduce your operating costs by up to 50-90% with Spot instances, compared to On-Demand instances. To see the current prices, visit the Spot Pricing page.
You can run and scale applications such as stateless web services, image rendering, big data analytics and massively parallel computations on Spot instances. Since Spot instances typically cost 50-90% less, you can increase your compute capacity by 2-10x within the same budget.