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Microsoft Azure Functions vs Fly.io
Compare Categories, Runtimes, Pricing, Regions and Alternatives

Features

Microsoft Azure Functions 
Category

FaaS
Compute
N/A
CaaS
DBaaS
PaaS
Edge
API Gateway

Fly.io 
Category

FaaS
N/A
Compute
CaaS
DBaaS
PaaS
Edge
N/A
API Gateway

Microsoft Azure Functions 
Container Deployment

Docker
Docker Private Registry
Kubernetes
Managed Kubernetes

Fly.io 
Container Deployment

Docker
Docker Private Registry
Kubernetes
Managed Kubernetes

Microsoft Azure Functions 
Supported Runtimes

.NET
C#
Crystal
Deno
Elixir
Go
Java
JavaScript
PHP
PowerShell
Python
Ruby
Rust

Fly.io 
Supported Runtimes

.NET
C#
Crystal
Deno
Elixir
Go
Java
JavaScript
PHP
PowerShell
Python
Ruby
Rust

Microsoft Azure Functions 
Execution Limits and Resource Quotas

Min. Memory
1536 MB
Max. Memory
4096 MB
Default Timeout
5 min
Max. Timeout
10 min
Request Payload
100 MB
Response Payload
100 MB

Fly.io 
Execution Limits and Resource Quotas

Min. Memory
256 MB
Max. Memory
32 GB
Default Timeout
60 s
Max. Timeout
5 min
Request Payload
200 KB
Response Payload

Microsoft Azure Functions 
Compliance

BAA
DPA
GDPR
HIPAA
PHIPA
SOC2

Fly.io 
Compliance

BAA
DPA
GDPR
HIPAA
PHIPA
SOC2

Microsoft Azure Functions 
Regional Availability

Deployment Scope
8 Global
Regions
N/A
Points of Presence
100+

Fly.io 
Regional Availability

Deployment Scope
Regional + Global
Regions
NA, LATAM, EU, MEA, APAC
Points of Presence
16, 5, 8, 1, 5

Alternatives are matched by category, runtimes, and hosting.

Compare Features, Languages, Execution Limits and Alternatives

Category
Decentralized
Hosted
Self Hosted
BaaS
FaaS
Compute
CaaS
Docker
Managed K8s
DBaaS
KV Store
PaaS
IaC
Edge
Emulator
API Gateway
Container Deployment
Docker
Docker Private Registry
Docker Swarm
Kubernetes
Managed Kubernetes
WebAssembly
Supported Runtimes
.NET
C#
Crystal
Deno
Elixir
Go
Java
JavaScript
PHP
PowerShell
Python
Ruby
Rust
Supported Frameworks
Supported Frameworks
Execution Limits and Resource Quotas
1536 MB
Min. Memory
256 MB
4096 MB
Max. Memory
32 GB
5 min
Default Timeout
60 s
10 min
Max. Timeout
5 min
100 MB
Request Payload
200 KB
100 MB
Response Payload
Compliance
Certificates
Regional Availability
8 Global
Deployment Scope
Regional + Global
Regions
NA, LATAM, EU, MEA, APAC
100+
Points of Presence
16, 5, 8, 1, 5
Sustainabilty
Green Energy

Alternatives are matched by category, runtimes, and hosting.

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