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Fermyon Spin

UnclaimedEditor reviewed

Framework for serverless WebAssembly applications

ServerlessCloud & InfrastructureDeveloper Tools
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Tracked since2025
0 reviews tracked

The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

WebAssembly framework

Biggest con

Newer platform

TL;DR - Fermyon Spin

  • Fermyon Spin is a framework for building and running WebAssembly microservices
  • It enables fast-starting serverless functions written in Rust, Go, and other languages
  • Free and open-source, Fermyon Cloud from free tier
Pricing: Free plan available
Best for: Growing teams

What is Fermyon Spin?

Editorial review
Fermyon Spin runs WebAssembly applications with near-instant cold starts. Serverless without the cold start penalty-edge computing that responds immediately. The startup times are genuinely fast. Multiple languages compile to Wasm. The developer experience is smooth. Applications needing serverless with predictable response times choose Spin for WebAssembly that starts instantly.
how we evaluateSourcefermyon.com ↗

Pros & Cons

Pros

  • WebAssembly framework
  • Good for serverless
  • Active development
  • Good DX
  • Open source

Cons

  • Newer platform
  • Learning curve
  • Limited ecosystem
  • Still maturing
  • WASM limitations

Key Features

WebAssembly appsServerlessFast startupMulti-languageCloud deployOpen source

Pricing Plans

Starter

Free

Free forever

  • 5 applications
  • 100,000 request executions
  • 5 custom domains
  • 1GB key-value storage
  • 1GB SQLite storage
  • 5GB bandwidth

Growth

$19.38/month

Scale up

  • 100 applications
  • 1,000,000 request executions
  • 100 custom domains
  • 2GB key-value storage
  • 2GB SQLite storage
  • 50GB bandwidth

Enterprise

null

Large scale

  • Custom usage limits
  • Advanced support
  • Organizational features
Calculate your costView full pricing

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Best Fermyon Spin Alternatives

Top alternatives based on features, pricing, and user needs.

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Cloudflare WorkersFreemium

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DenoFreemium

The next-generation open-source JavaScript runtime for the modern web, built on web standards.

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WasmtimeFree

Fast, secure, and configurable WebAssembly runtime for diverse environments.

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

Fermyon Spin vs AWS LambdaHead-to-head: features, pricing, who winsFermyon Spin vs Google Cloud FunctionsHead-to-head: features, pricing, who winsFermyon Spin vs Cloudflare WorkersHead-to-head: features, pricing, who wins

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Fermyon Spin FAQ

Is Fermyon Spin free?

Spin framework is free and open source. Fermyon Cloud has free tier. Paid cloud hosting available.

What is Fermyon Spin?

Spin is a framework for building WebAssembly microservices. Serverless apps that start in milliseconds.

Spin vs Cloudflare Workers?

Both run WebAssembly. Spin is open-source framework deployable anywhere. Cloudflare Workers is proprietary platform. Different approaches.

What languages does Spin support?

Rust, Go, JavaScript/TypeScript, Python, and others via WebAssembly. Rust has best support.

Source: fermyon.com

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