Question: Is there a platform that offers a free tier and scalable pricing for building and deploying complex applications?

First up is Neon, a serverless service designed to let developers write fast, scalable and reliable apps. It uses Postgres as its database and supports autoscaling, branching for separate DB clones, CI/CD and schema migrations. Neon's pricing starts with a free tier and goes up to $69 per month for the launch tier, so it's got a good range for different use cases.

Another strong contender is Vercel, a cloud service for deploying and managing web apps. It supports a variety of frameworks and AI apps, with features like instant rollbacks, frontend observability and elastic scaling. Vercel offers a free account for small-scale use and flexible enterprise plans, so it's good for small or large companies.

If you want to use AI to help with your development, Back4app is a cloud service that can speed up your time-to-market and increase productivity. It's got a powerful backend service for storing and querying relational data, web deployment with containerized scaling, and an AI agent that can create cloud infrastructure. Back4app offers a free tier and pay-as-you-go pricing, with a focus on security and performance upgrades.

Last is Replit, a cloud service for building, sharing and deploying software as quickly as possible. It's got collaboration tools, AI code generation and deployment options for hosting projects without a lot of setup. Replit offers a free starter tier and pay-as-you-go pricing, so it's good for developers who want to try out different projects.