What is the cost difference between using AWS Amplify and Cloudflare?

The cost depends on usage. Amplify's pricing is based on usage of its various services (hosting, storage, etc.) and is generally pay-as-you-go. Cloudflare offers a range of pricing tiers, including a free plan, with paid plans offering more features and higher bandwidth limits. For simple applications, Cloudflare's free tier may be sufficient. For demanding applications with high traffic, Cloudflare's paid plans might be more cost-effective than Amplify's usage-based pricing.