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Fastly vs Fly.io

Side-by-side comparison of features, pricing, ratings, and alternatives.

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Fastly
FastlyAn edge cloud platform delivering faster, safer, and more scalable sites and apps.
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Fly.io
Fly.ioRun full-stack apps and databases globally
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Overview
Description

Fastly is a programmable edge cloud platform designed to help developers build, secure, and deliver digital experiences closer to users. By leveraging a modern, Varnish-powered content delivery network (CDN), it accelerates dynamic content delivery, API routing, and image optimization while reducing origin server load. The platform integrates advanced security services, including enterprise-grade Web Application Firewall (WAF), DDoS mitigation, and bot management, all managed at the edge. With real-time observability and instant cache purging, engineering teams gain unprecedented control and visibility over their web traffic and application performance.

Fly.io is a platform that lets developers run full-stack applications and databases on a worldwide network of edge locations. It abstracts infrastructure so you can focus on code while your services run close to users for faster response times.

Pricing
—
Paid (Subscription)
Category
Content Delivery Network (CDN)
Platform as a Service (PaaS)
Best for
Developers, enterprises, and high-traffic web apps
Developers and startups needing global edge hosting
Specifications
free tier
No
Yes
uptime sla
99.99%
99.9% (Enterprise plan only)
datacenter regions
Global (US, EU, APAC, South America, Australia)
North America, Europe, Asia, Australia, South America
Pros & Cons
Pros
  • Extremely fast global cache purging speeds
  • Robust edge computing capabilities with Compute@Edge
  • Highly customizable VCL configuration for advanced routing
  • Comprehensive real-time observability and logging
  • Generous free tier with simple CLI deployment
  • Automatic TLS and built-in scaling
  • Global deployment and edge locations for faster response times
  • Ideal for startups, hobby projects, and production workloads
Cons
  • Steeper learning curve for advanced configurations compared to traditional CDNs
  • Pricing can become expensive for high-volume enterprise workloads
  • Documentation can be technical and complex for beginners
  • Limited control over underlying infrastructure
  • May require additional setup for complex applications
  • Dependent on Fly.io's network and infrastructure
Community & Metrics
Upvotes
0
0
User rating
Not enough data
Not enough data

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The Verdict

AI-generated from listing data

Fastly delivers enterprise‑grade performance and advanced edge compute at a higher cost and complexity, while Fly.io offers a free tier, simpler developer experience, and slightly lower SLA.

Key differences

  • •Pricing model – Fastly has unknown/likely expensive pricing; Fly.io provides a freemium tier.
  • •Edge compute capabilities – Fastly supports custom WebAssembly/JS and VCL; Fly.io offers generic full‑stack hosting.
  • •Uptime SLA – Fastly guarantees 99.99%; Fly.io only 99.9% on its Enterprise plan.
  • •Developer experience – Fastly has a steep learning curve; Fly.io uses a simple CLI and easy onboarding.
  • •Control vs. abstraction – Fastly gives deep configuration control; Fly.io abstracts infrastructure.
DimensionWinner

Pricing & value

Fly.io offers a freemium tier; Fastly pricing is unknown and can become expensive for high‑volume workloads.

Fly.io

Uptime & reliability

Fastly provides a 99.99% SLA, whereas Fly.io’s 99.9% SLA applies only to its Enterprise plan.

Fastly

Performance

Fastly delivers millisecond‑scale global cache invalidation and custom edge compute, outperforming generic edge hosting.

Fastly

Developer experience

Fly.io offers a simple CLI and generous free tier; Fastly has a steeper learning curve and complex docs.

Fly.io

Regions & compliance

Both cover North America, Europe, Asia, Australia, and South America.

Tie

Support

not specified

Tie

Lock‑in

Both platforms use proprietary edge technologies; no direct comparison provided.

Tie

Choose Fastly if…

Enterprises needing high performance, custom edge logic, and willing to invest in premium services.

Choose Fly.io if…

Startups or developers seeking a free tier, easy deployment, and simpler edge hosting.

Common questions

Which option is cheaper for a low‑traffic project?

Fly.io offers a freemium tier at no cost; Fastly’s pricing is not disclosed and can be expensive for low volume.

Which platform provides more advanced edge compute capabilities?

Fastly supports custom WebAssembly/JavaScript via Compute@Edge and granular VCL routing, whereas Fly.io provides generic full‑stack edge hosting.

What uptime guarantee does each service provide?

Fastly guarantees 99.99% uptime; Fly.io guarantees 99.9% uptime only on its Enterprise plan.