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Pricing, plan names, free plan availability, and trial details are checked against official provider pages before being used in ProPicked scores. Vendor relationships do not change rankings, scores, or recommendations.
Provider Pricing Facts
Provider pricing facts: SST offers a free plan; Fly.io offers a free plan.
Source and Freshness Note
Source and freshness note: pricing, free-plan, and feature signals are compared from public provider data and updated comparison records. Last checked May 2026.
SST vs Fly.io: Honest Comparison (2026)
SST
Open-source framework for building full-stack serverless applications on AWS
Fly.io
Run your applications at the edge close to users worldwide
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Quick Verdict:
SST wins with 8.5/10 vs 8.3/10. Choose SST for ease of use. Choose Fly.io for better value for money.
SST wins this comparison with a score of 8.5/10 vs 8.3/10. Both offer free plans. SST stands out for dramatically simplifies building serverless apps on AWS, while Fly.io excels at true multi-region deployment puts applications close to users worldwide for minimal latency. This is confirmed by our feature analysis where SST also scores higher (9.1/10).
| Feature | SST | Fly.io |
|---|---|---|
| Overall Rating | 8.5/10 | 8.3/10 |
| Ease of Use | 8.8/10 | 7.5/10 |
| Features | 8.6/10 | 8.7/10 |
| Value for Money | 8.3/10 | 8.4/10 |
| Customer Support | 9.0/10 | 7.2/10 |
| Free Plan | Yes ✓ | Yes ✓ |
| Starting Price | Custom | $29/mo |
| Feature Score | 9.1/10 | 7.9/10 |
| Top Strength | Dramatically simplifies building serverless apps on AWS | True multi-region deployment puts applications close to users worldwide for minimal latency |
| Biggest Weakness | Locked to AWS as the cloud provider | Firecracker micro-VMs provide near-instant boot times and efficient resource utilization |
| Best For | SST is the best developer experience for building serverless applications on AWS | Fly.io is best for developers building latency-sensitive applications that benefit from multi-region edge deployment. It's the top choice for real-time apps |
| Winner | SST (8.5/10) | |
What is SST?
Open-source framework for building full-stack serverless applications on AWSSST is an open-source framework that makes it dramatically easier to build and deploy full-stack serverless applications on AWS. Instead of wrestling with CloudFormation templates, CDK constructs, or SAM configurations, SST provides high-level components for common serverless patterns including API routes, static sites, cron jobs, queues, databases, authentication, and storage buckets with sensible defaults and minimal configuration. The framework features Live Lambda, a local development environment that connects to real AWS services so developers can set breakpoints, make changes, and test against actual cloud resources without deploying or emulating. This development experience is a significant improvement over the slow deploy-test-debug cycles typical of serverless development. SST supports Next.js, Remix, Astro, SvelteKit, and other frameworks for frontend deployment, with automatic CDN distribution and custom domain configuration.
- +Dramatically simplifies building serverless apps on AWS
- +Live Lambda enables local development with real cloud resources
- +High-level components for common serverless patterns
- •SST is the best developer experience for building serverless applications on AWS
- •teams wanting faster serverless development cycles with Live Lambda
- •startups leveraging AWS credits for cost-effective infrastructure
What is Fly.io?
Run your applications at the edge close to users worldwideFly.io is an application hosting platform that runs apps on lightweight Firecracker micro-VMs distributed across 30+ regions worldwide. Unlike traditional hosting that places apps in a single data center, Fly.io deploys your application close to users at the edge, dramatically reducing latency. The platform supports any language or framework via Docker and offers managed PostgreSQL, Redis, and object storage. Fly.io is particularly popular for deploying Elixir, Rails, and full-stack applications that benefit from multi-region distribution.
- +True multi-region deployment puts applications close to users worldwide for minimal latency
- +Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- +Generous free tier includes 3 VMs and shared resources for small projects
- •Fly.io is best for developers building latency-sensitive applications that benefit from multi-region edge deployment. It's the top choice for real-time apps
- •global SaaS products
- •and Elixir/Phoenix applications that need to run close to users worldwide
SST vs Fly.io: Key Differences
SST vs Fly.io: Quick Verdict
SST and Fly.io are neck and neck at 8.5/10 and 8.3/10. At this point, the best choice is whichever one clicks with how you work.
Choose SST if:
- Dramatically simplifies building serverless apps on AWS
- Live Lambda enables local development with real cloud resources
- High-level components for common serverless patterns
- You want the higher-rated option overall (8.5/10 vs 8.3/10)
- Ease of use matters to you — SST scores 8.8/10 here
Choose Fly.io if:
- True multi-region deployment puts applications close to users worldwide for minimal latency
- Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- Generous free tier includes 3 VMs and shared resources for small projects
- You're watching your budget — Fly.io gets a 8.4/10 for value
Decision Summary
Who wins in each scenario? A quick look at how SST and Fly.io compare across different buyer needs.
Scores 8.5/10 vs 8.3/10
Both score 8.3/10 on value
Ease of use: 8.8/10 vs 7.5/10
Features + support avg: 8.8/10 vs 7.9/10
Both are equally startup-friendly
Both offer free plans
Choose SST if you need...
- ✓Dramatically simplifies building serverless apps on AWS
- ✓Live Lambda enables local development with real cloud resources
- ✓High-level components for common serverless patterns
- ✓Lower starting price ($0/mo vs $29/mo)
- !Locked to AWS as the cloud provider
- !Learning curve for developers new to serverless concepts
Choose Fly.io if you need...
- ✓True multi-region deployment puts applications close to users worldwide for minimal latency
- ✓Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- ✓Generous free tier includes 3 VMs and shared resources for small projects
- !True multi-region deployment puts applications close to users worldwide for minimal latency
- !Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
Our Take: SST vs Fly.io
This is one of the closer matchups we've reviewed. SST (8.5/10) and Fly.io (8.3/10) are separated by just 0.2 points — practically a statistical tie. Your decision should come down to workflow fit, not scores.
Where they differ: SST's biggest strengths are dramatically simplifies building serverless apps on AWS and live Lambda enables local development with real cloud resources. Fly.io, on the other hand, shines with true multi-region deployment puts applications close to users worldwide for minimal latency and firecracker micro-VMs provide near-instant boot times and efficient resource utilization. These reflect fundamentally different product priorities.
Both offer free plans, so you can test each one with zero risk before committing. We recommend trying both for a week with real data.
SST vs Fly.io Score Comparison
| Category | SST | Fly.io |
|---|---|---|
🏆Overall Score | 8.5▲ | 8.3 |
💫Ease of Use | 8.8▲ | 7.5 |
⚙Features | 8.6 | ▲8.7 |
💰Value for Money | 8.3 | ▲8.4 |
💬Customer Support | 9.0▲ | 7.2 |
Why These Scores? Our Reasoning
- +Dramatically simplifies building serverless apps on AWS
- +Live Lambda enables local development with real cloud resources
- +High-level components for common serverless patterns
- -Locked to AWS as the cloud provider
- -Learning curve for developers new to serverless concepts
- +True multi-region deployment puts applications close to users worldwide for minimal latency
- +Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- +Generous free tier includes 3 VMs and shared resources for small projects
- -True multi-region deployment puts applications close to users worldwide for minimal latency
- -Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
SST vs Fly.io Pros & Cons
+Strengths
- ✓Dramatically simplifies building serverless apps on AWS
- ✓Live Lambda enables local development with real cloud resources
- ✓High-level components for common serverless patterns
- ✓Supports Next.js, Remix, Astro, and other frameworks
- ✓Active open-source community with excellent documentation
-Weaknesses
- ✗Locked to AWS as the cloud provider
- ✗Learning curve for developers new to serverless concepts
- ✗Some complex AWS patterns still require CDK knowledge
- ✗Framework updates can occasionally introduce breaking changes
+Strengths
- ✓True multi-region deployment puts applications close to users worldwide for minimal latency
- ✓Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- ✓Generous free tier includes 3 VMs and shared resources for small projects
-Weaknesses
- ✗True multi-region deployment puts applications close to users worldwide for minimal latency
- ✗Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- ✗Generous free tier includes 3 VMs and shared resources for small projects
Who Should Use SST vs Fly.io?
SST is ideal for
- •SST is the best developer experience for building serverless applications on AWS
- •teams wanting faster serverless development cycles with Live Lambda
- •startups leveraging AWS credits for cost-effective infrastructure
- •and engineers deploying Next.js or Remix applications to AWS
Fly.io is ideal for
- •Fly.io is best for developers building latency-sensitive applications that benefit from multi-region edge deployment. It's the top choice for real-time apps
- •global SaaS products
- •and Elixir/Phoenix applications that need to run close to users worldwide
When NOT to Choose SST or Fly.io
Knowing when a tool is the wrong fit is just as important as knowing its strengths
Skip SST if...
- ✗Locked to AWS as the cloud provider
- ✗Learning curve for developers new to serverless concepts
- ✗Some complex AWS patterns still require CDK knowledge
- ✗Framework updates can occasionally introduce breaking changes
Skip Fly.io if...
- ✗True multi-region deployment puts applications close to users worldwide for minimal latency
- ✗Firecracker micro-VMs provide near-instant boot times and efficient resource utilization
- ✗Generous free tier includes 3 VMs and shared resources for small projects
SST vs Fly.io Decision Framework
Choose based on what matters most to you
SST vs Fly.io Pricing
| Pricing Feature | SST | Fly.io |
|---|---|---|
| Free Plan | ✓ Yes | ✓ Yes |
| Starting Price | Free | $29/mo |
| Free Trial | Not available | Not available |
| Number of Plans | 2 | 4 |
| Value Rating | 8.3/10 | 8.4/10 |
SST Plans
- ✓Open source framework
- ✓No licensing fees
- ✓Full feature access
- ✓Usage-based pricing
- ✓App management dashboard
- ✓Production monitoring
Fly.io Plans
- ✓3 shared VMs
- ✓256MB RAM each
- ✓3GB persistent volumes
- ✓160GB bandwidth
- ✓$29 usage credits
- ✓Dedicated CPUs
- ✓Extended support
- ✓Email support
- ✓$299 usage credits
- ✓Priority support
- ✓SLA
- ✓SOC 2 compliance
- ✓Custom contracts
- ✓Dedicated support
- ✓Custom SLA
- ✓Volume discounts
What You Get: Plan Feature Comparison
Comparing SST's Free (Free) vs Fly.io's Launch ($29/mo)
| Feature | SST | Fly.io |
|---|---|---|
| Open source framework | ✓ | ✗ |
| No licensing fees | ✓ | ✗ |
| Full feature access | ✓ | ✗ |
| $29 usage credits | ✗ | ✓ |
| Dedicated CPUs | ✗ | ✓ |
| Extended support | ✗ | ✓ |
| Email support | ✗ | ✓ |
Which Should You Choose?
Quick Buyer's Guide
Based on our analysis, here's who each tool is best suited for
- ✓SST is the best developer experience for building serverless applications on AWS
- ✓teams wanting faster serverless development cycles with Live Lambda
- ✓Users who need dramatically simplifies building serverless apps on AWS
- ✓Fly.io is best for developers building latency-sensitive applications that benefit from multi-region edge deployment. It's the top choice for real-time apps
- ✓global SaaS products
- ✓Users who need true multi-region deployment puts applications close to users worldwide for minimal latency
SST vs Fly.io: The Bottom Line
SST wins this comparison, but the right pick depends on your priorities.
## Our Verdict SST and Fly.io are neck and neck at 8.5/10 and 8.3/10. At this point, the best choice is whichever one clicks with how you work. ### Choose SST if: - Dramatically simplifies building serverless apps on AWS - Live Lambda enables local development with real cloud resources - High-level components for common serverless patterns - You want the higher-rated option overall (8.5/10 vs 8.3/10) - Ease of use matters to you — SST scores 8.8/10 here ### Choose Fly.io if: - True multi-region deployment puts applications close to users worldwide for minimal latency - Firecracker micro-VMs provide near-instant boot times and efficient resource utilization - Generous free tier includes 3 VMs and shared resources for small projects - You're watching your budget — Fly.io gets a 8.4/10 for value The gap is razor-thin — Fly.io at 8.3/10 is a perfectly valid choice if its strengths align better with your needs.