Question: I'm looking for a solution that provides scalable and secure RPC and REST APIs for my decentralized application.

If you need a service that offers scalable and secure RPC and REST APIs for your decentralized app, QuickNode is worth a look. It offers low-latency, high-reliability and high-scale access to big blockchains with security features like MEV protection and custom chains for fully-managed blockchains. It has a 99.99% uptime SLA and 24/7 support, and is used for decentralized finance, gaming, digital identity, healthcare and public records.

Another good option is dRPC, a decentralized network of RPC endpoints for high-performance, low-latency access to data across multiple blockchain platforms. It includes an AI-powered load balancer and analytics for monitoring and management, so it's a good foundation for running Web3 infrastructure. It supports Ethereum, Polygon and Arbitrum, and has a pay-as-you-go pricing model, so dRPC offers flexibility and scalability for your app.

If you want a platform that puts privacy first, Oasis offers scalable and secure options with its private decentralized applications (dApps) built with the Oasis Sapphire, a confidential Ethereum Virtual Machine. It's got a modular design for high throughput and interoperability across different blockchain networks, so it's good for use cases like decentralized AI, DeFi and gaming.

Finally, RPC Fast offers high-availability blockchain node infrastructure with dedicated nodes for Ethereum, BNB Chain and Polygon. It's got predictive autoscaling for peak performance and a variety of security options, including a software-defined perimeter and firewall. And it's got multiple pricing tiers for different needs, so RPC Fast should be able to keep your app running reliably and scale for high-availability apps.