How Much Does It Cost to Host a REST API on the Cloud?
A REST API costs roughly $30-$80/mo at 10K requests/day on a basic VM, $150-$400/mo at 100K requests/day with a managed database, and $500-$2,000/mo at 1M+ requests/day. The database is usually the biggest cost, not compute.
Whether you are building a public API, a mobile app backend, or a microservices architecture, hosting costs depend on request volume, compute type, and database needs. AWS, Azure, and GCP each price these components differently. Use our calculator to compare the real cost of running your REST API across all three providers.
REST API Infrastructure Components
A production REST API needs compute (VMs, containers, or serverless functions), a database (SQL or NoSQL depending on data model), an API gateway for rate limiting and authentication, a load balancer for distributing requests, and monitoring for latency and error tracking. Optional components include caching (Redis) for frequently accessed data and a message queue for async processing.
VM vs Container vs Serverless for APIs
VMs (EC2, Azure VMs, Compute Engine) offer predictable performance at fixed cost — best for steady traffic. Containers on Kubernetes (EKS, AKS, GKE) add auto-scaling and efficient resource utilization — ideal for variable traffic with a baseline load. Serverless (Lambda, Azure Functions, Cloud Functions) charges per request with zero idle cost — perfect for low-traffic or spiky APIs. The cost crossover point is typically around 1M requests/month, where containers become cheaper than serverless.
How API Costs Scale with Traffic
At 10K requests/day, a basic VM setup costs $30–$80/month across providers. At 100K requests/day, expect $150–$400/month with a managed database. At 1M+ requests/day, costs range from $500–$2,000/month depending on database size, caching needs, and data transfer. The biggest cost driver at scale is usually the database, not compute.
Key Cost Factors
- Compute: VMs, containers, or serverless functions
- Database: Managed SQL or NoSQL for data persistence
- API Gateway: Request routing, throttling, and auth
- Load balancer: Traffic distribution across instances
- Caching: Redis for response caching and rate limiting
- Data transfer: Egress costs for API responses
Frequently Asked Questions
How much does REST API hosting cost on AWS vs Azure vs GCP?
At 10K requests/day, a basic VM setup costs $30-$80/month across all three providers. At 100K requests/day, expect $150-$400/month once you add a managed database. At 1M+ requests/day, costs range from $500-$2,000/month depending on database size, caching needs, and data transfer volume. Serverless (Lambda, Azure Functions, Cloud Functions) can undercut VM-based hosting below roughly 1M requests/month, after which containers usually become cheaper.
What is the cheapest way to host a REST API?
For low and spiky traffic, serverless functions are usually cheapest since you pay per request with zero idle cost. For steady traffic above the roughly 1M requests/month crossover point, containers on Kubernetes or a plain VM setup tend to win because you're not paying the serverless per-invocation premium. There's no single cheapest provider — it depends on whether your workload is steady or bursty.
What drives the cost of hosting a REST API?
The database is usually the largest cost factor at scale, more than compute. Beyond that, an API gateway for routing and auth, a load balancer for distributing requests, Redis caching for frequently accessed data, and data transfer/egress for API responses all add up. Choosing VM vs container vs serverless compute changes the cost curve significantly depending on your traffic pattern.
How accurate are these REST API cost estimates?
Figures are based on published on-demand list prices for AWS, Azure, and GCP in US regions, assuming 730 hours per month, last verified 2026-07-15. Actual bills will differ based on database engine choice, reserved capacity discounts, and how much traffic you can offload to caching. Use these numbers to compare providers and architectures, not as a final invoice — see /methodology.