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Servers invoked on demand.

The servers are still there, started on demand and stopped again. Strictly it means functions: small stateless handlers spun up for one request and thrown away, leaning on managed databases for anything that has to be remembered. That suits spiky traffic, idle applications and event work. It suits ordinary applications badly, always in the same ways — waking from idle costs time, the filesystem is throwaway, every cold environment opens its own database connection, nothing outlives the platform’s ceiling, and steady traffic costs more than a flat rate. Vendors stretch the word, so the question worth asking is whether anything runs while nobody is looking. PaaS is the same convenience billed per running instance.

20 providers are serverless, listed alphabetically. Across 36 countries, commonest entry price under $5 a month.

A

  • Alibaba Cloud

    Alibaba Cloud provides infrastructure, platform and serverless services spanning 32 regions with support for Linux, Windows, containers and multiple runtimes.

  • Appwrite

    Open-source backend platform sold as a hosted service, running user functions alongside managed databases, authentication, storage and messaging.

  • AWS Lambda

    Amazon's function-as-a-service primitive, running a handler on demand in a short-lived isolated environment and billing per invocation.

B

  • Back4App

    Managed Parse Server backend with an auto-generated REST and GraphQL API, plus a container platform that builds and runs Docker images from GitHub.

  • Bunny.net

    Slovenian edge platform selling CDN, storage, video and DNS, with Edge Scripting and Magic Containers running the customer's own code across its network.

C

  • Cloudflare Workers

    Cloudflare's edge compute platform, running JavaScript, TypeScript, Python and Rust in V8 isolates on the network that already serves the request.

D

  • Deno Deploy

    Serverless hosting for JavaScript and TypeScript built by the Deno team, running the Deno runtime with Node and npm compatibility.

  • DigitalOcean Functions

    DigitalOcean Functions is a function-as-a-service platform built on Apache OpenWhisk, running short-lived handlers in several native language runtimes.

F

  • Firebase

    Firebase is Google's application platform, bundling a document database, authentication and storage with hosting that builds framework applications onto Cloud Run.

G

  • Gcore

    Gcore is an edge and cloud provider selling CDN, streaming, DDoS protection, virtual machines, bare metal, Kubernetes and serverless functions.

  • Google Cloud Run

    Google Cloud Run runs any container image, scales it to zero when idle and bills per request and per resource-second.

L

  • Laravel Vapor

    Laravel Vapor is a serverless deployment platform for Laravel applications on AWS Lambda, sold as a flat subscription on top of the customer's own AWS bill.

M

  • Modal

    Serverless compute platform for Python, where functions are decorated in code and run in containers on CPU or GPU with per-second billing.

N

  • Netlify

    Platform that builds sites from a git repository and serves them from a global CDN, with serverless functions, edge functions, blob storage and a database.

  • Nhost

    Open-source backend platform built on PostgreSQL, Hasura GraphQL and serverless functions, with a managed container runtime for the customer's own services.

S

  • Scaleway

    French cloud provider selling instances, bare metal, managed Kubernetes, serverless containers and managed databases, with European data residency as the pitch.

  • Scaleway Functions

    European function-as-a-service from Scaleway, running Node, Python, Go, Rust and PHP handlers billed by request and by memory consumed.

  • Supabase

    Open-source backend built on PostgreSQL, with authentication, storage, realtime and Edge Functions that run the customer's own TypeScript on Deno.

V

  • Vercel

    Vercel is a frontend platform for Javascript people. It's formerly known as Zeit and venture backed and high on the AI wave.

W

  • Wasmer

    WebAssembly runtime company whose edge platform runs applications compiled to WASM, PHP among them, close to the visitor.