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 wins this matchup. WordPress.com is our overall Hosting & Deployment pick. WordPress.com is our free Hosting & Deployment pick. 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 want industry-standard serverless platform
- • You want integrates with entire AWS ecosystem
Fly.io
Deploy apps close to users on edge infrastructure
Best for you if:
- • You want run apps close to users globally
- • You want excellent for containerized apps
| At a Glance | AWS Lambda | Fly.io |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Serverless | Hosting & Deployment |
Rating | 3.5/5 | - |
Free plan | Yes | Yes |
Choose AWS Lambda or Fly.io?
Choose AWS Lambda if
Run code without managing servers, pay only for compute time
- You want industry-standard serverless platform
- You want integrates with entire AWS ecosystem
- Your work is serverless-shaped, not hosting & deployment-shaped
Choose Fly.io if
Deploy apps close to users on edge infrastructure
- You want run apps close to users globally
- You want excellent for containerized apps
- Your work is hosting & deployment-shaped, not serverless-shaped
| Feature | AWS Lambda | Fly.io |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | ★3.5/5 1,570 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
Lambda pioneered serverless compute and remains the default choice in the AWS ecosystem.
Watch out
Duration billing rounds up to the nearest millisecond, but memory billing is per-GB-second at allocated memory (not used memory). Allocating 1 GB but using 200 MB still bills for 1 GB, right-sizing memory is critical
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
Fly.io abandoned fixed plans in favor of pure pay-as-you-go, which is transparent but makes cost prediction harder.
Watch out
Bandwidth is not free and varies wildly by region: $0.02/GB in North America/Europe but $0.12/GB in Africa and India.
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?
Both are freemium. Compare plans on their websites.
Go with: AWS Lambda
Want the highest-rated option?
AWS Lambda is rated 3.5/5. Fly.io has no ratings yet.
Go with: AWS Lambda
Value user reviews?
AWS Lambda: 1,570 reviews (3.5/5). Fly.io: no ratings yet.
Go with: AWS Lambda
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
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 3.5/5; Fly.io has no ratings yet.
Key Takeaways
AWS Lambda
- Free tier available
- Our pick for this comparison
Fly.io
- Better fit for hosting & deployment
The Bottom Line
AWS Lambda wins this matchup. WordPress.com is our overall Hosting & Deployment pick. WordPress.com is our free Hosting & Deployment pick.
Frequently Asked Questions
Is AWS Lambda or Fly.io better?
AWS Lambda is rated in our evaluation. Both are 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 freemium (free tier + paid plans). Fly.io is freemium (free tier + paid plans). Visit their websites for detailed pricing.