1. Cost: One key difference between Amazon CloudFront and Limelight CDN is the cost structure. Amazon CloudFront offers a pay-as-you-go pricing model, where users only pay for the data transfer and other service features used. On the other hand, Limelight CDN provides customizable pricing plans that can include a mix of monthly commitments, data transfer, and additional features such as storage or security services. This difference in cost structure allows customers to choose the most suitable option based on their specific needs and budget.

2. Global Edge Network: Another important difference is the scale and reach of their global edge networks. Amazon CloudFront has a vast network of edge locations spread across the globe, which allows for faster content delivery to end-users. Limelight CDN also has a large network of edge servers, but the exact number and coverage may vary. The extensive edge network of both providers ensures that content can be delivered quickly and efficiently to users worldwide.

3. Integration with AWS services: Amazon CloudFront integrates seamlessly with various other services offered by Amazon Web Services (AWS). This integration enables users to easily leverage additional AWS features, such as AWS Lambda for serverless functions or AWS Shield for DDoS protection. On the other hand, while Limelight CDN provides integration options with various third-party services and technologies, it may require additional configuration and setup.

4. Content Delivery Performance: Both Amazon CloudFront and Limelight CDN aim to deliver content quickly and efficiently. However, the performance may vary based on factors such as geographical location, network conditions, and the specific content being delivered. Amazon CloudFront leverages the global Amazon network and has optimized connections with AWS services, which can result in faster and more reliable content delivery. Limelight CDN also focuses on high-performance delivery with its extensive network, but the overall performance may depend on various factors.

5. Security Features: Both Amazon CloudFront and Limelight CDN offer a range of security features to protect content and applications. Amazon CloudFront provides integration with AWS Web Application Firewall (WAF), which enables users to apply custom security rules and protect against malicious attacks. Limelight CDN offers various security options like DDoS mitigation, access controls, and HTTPS support. The specific security features provided by each provider may vary, allowing customers to choose the level of security that suits their requirements.

6. Customization and Control: Amazon CloudFront offers extensive customization options, allowing users to fine-tune various settings such as caching behavior, origin configurations, and rules for content delivery. It provides a flexible and powerful control panel for managing the content delivery process. Limelight CDN also provides customization options but may have different levels of granularity or flexibility compared to Amazon CloudFront. The level of customization and control available may depend on the specific features and services chosen.

In summary, Amazon CloudFront and Limelight CDN differ in their cost structure, global edge network coverage, integration with other services, content delivery performance, security features, and customization options. These differences allow customers to choose the CDN provider that best fits their specific needs and requirements.