AWS Lambda vs Fly.io: Which is Better in 2026?
Choosing between AWS Lambda and Fly.io comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: AWS Lambda is our overall pick for serverless workflows. Pick Fly.io if you need hosting & deployment.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
AWS Lambda
Run code without managing servers, pay only for compute time
Best for you if:
- • You need serverless features specifically
- • AWS Lambda lets you run code without provisioning servers-just upload your function and it scales automatically
- • It executes code in response to events from 200+ AWS services, charging only for compute time used
Fly.io
Deploy apps close to users on edge infrastructure
Best for you if:
- • You want to try before committing
- • You need hosting & deployment features specifically
- • Fly.io is a platform for deploying applications globally on servers close to users
- • It runs Docker containers, databases, and full-stack apps on edge infrastructure
| At a Glance |  AWS Lambda |  Fly.io |
|---|---|---|
Starts at | $0.16/moGraviton2 (ARM) | FreeFree tier available |
Best For | Serverless | Hosting & Deployment |
Rating | 4.6/5 | - |
Free plan | No | Yes |
Choose AWS Lambda or Fly.io?
Choose AWS Lambda if
Run code without managing servers, pay only for compute time
- Industry-standard serverless platform
- Integrates with entire AWS ecosystem
- Scales automatically to any load
- Your work is serverless-shaped, not hosting & deployment-shaped
Choose Fly.io if
Deploy apps close to users on edge infrastructure
- Run apps close to users globally
- Excellent for containerized apps
- Free allowance included
- Your work is hosting & deployment-shaped, not serverless-shaped
| Feature | AWS Lambda | Fly.io |
|---|---|---|
| Pricing Model | Paid | Freemium |
| User Rating | ★4.6/5 1,079 reviews | No ratings yet |
| Categories | ServerlessCloud & Infrastructure | Hosting & DeploymentCloud & Infrastructure |
In-Depth Analysis
AWS Lambda
Run code without managing servers, pay only for compute time
Strengths
- +Industry-standard serverless platform
- +Integrates with entire AWS ecosystem
- +Scales automatically to any load
- +Pay only for compute time used
- +Supports many languages and runtimes
Weaknesses
- -Cold starts can affect latency
- -Complex pricing model
- -15-minute execution time limit
- -Debugging can be challenging
- -Vendor lock-in with AWS services
Key features
Fly.io
Deploy apps close to users on edge infrastructure
Strengths
- +Run apps close to users globally
- +Excellent for containerized apps
- +Free allowance included
- +Good CLI experience
- +Sqlite and Postgres hosting
Weaknesses
- -Learning curve for full features
- -Pricing model complex
- -Support can be slow
- -UI less polished
- -Debugging remote apps hard
Key features
Pricing: AWS Lambda vs Fly.io
| Plan | AWS Lambda | Fly.io |
|---|---|---|
| Tier 1 | $0 Free Tier | Free Free |
| Tier 2 | $0.20/million Pay-as-you-go | $1.94 month Pay as you go |
| Tier 3 | $0.16/million Graviton2 (ARM) | N/A |
| Tier 4 | Up to 17% off Savings Plans | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on AWS Lambda pricing and Fly.io pricing.
Who Should Use What?
On a budget?
Fly.io has a free tier. AWS Lambda is paid only.
Go with: Fly.io
Want the highest-rated option?
AWS Lambda is rated 4.6/5. Fly.io has no ratings yet.
Go with: AWS Lambda
Value user reviews?
AWS Lambda: 1,079 reviews (4.6/5). Fly.io: no ratings yet.
Go with: AWS Lambda
3 Questions to Help You Decide
What's your budget?
AWS Lambda is paid. Fly.io is freemium. Fly.io lets you start free.
What's your use case?
AWS Lambda is a serverless tool. Fly.io is in hosting & deployment. Pick the category that matches your needs.
How important are ratings?
AWS Lambda is rated 4.6/5; Fly.io has no ratings yet.
Key Takeaways
AWS Lambda
- Our pick for this comparison
Fly.io
- Has a free tier
- Better fit for hosting & deployment
The Bottom Line
AWS Lambda is our pick. Fly.io has a free tier if you want to test without paying.
Frequently Asked Questions
Is AWS Lambda or Fly.io better?
AWS Lambda is rated in our evaluation. AWS Lambda is paid and Fly.io is freemium.
What are AWS Lambda and Fly.io used for?
AWS Lambda: Run code without managing servers, pay only for compute time. Fly.io: Deploy apps close to users on edge infrastructure.
What does AWS Lambda cost vs Fly.io?
AWS Lambda is a paid tool. Fly.io is freemium (free tier + paid plans). Visit their websites for detailed pricing.