No Python support: Netlify Edge Functions, StackPath EdgeEngine. IBM Cloud Functions are deprecated.
This document provides a comparison between hosted, serverless (no cost or management to spin down to zero) providers of cloud function hosts with Python runtimes. Note the distinction between edge providers (execution at PoP) and non-edge (typically predetermined DS region).
Please join our discussions or fix/update information by editing this doc!
See also the Serverless SQL DB Comparison
| Python Version | Status | API Framework | Requirements | Local Testing | Docs | Hello World | |
|---|---|---|---|---|---|---|---|
| Alibaba Cloud Function Compute | 3.10 | GA | Plain object | Vend in zip | ❔ | 🎉 | Link |
| AWS Lambda & Lambda@Edge | 3.12 | GA | Plain object | Vend in zip | ✅ | 👍 | Link |
| Azure Functions | 3.11 | GA | azure functions | ✅ | ✅ | 🎉 | Link |
| Cloudflare Workers (WASM) | 3.12 | Beta | fastapi and others | 🚫 | 🚫 | 🎉 | Link |
| Fermyon (WASM) | 3.11+ | No-native | Spin | ✅ | ❔ | 🎉 | Link |
| Fly.io (microVM) | Any | GA | Any | ✅ | ❔ | 👍 | Link |
| Google / Firebase Cloud Functions | 3.12 | GA | Flask | ✅ | ✅ | 🎉 | |
| IBM Code Engine | 3.11 | GA | Plain object | ✅ | ✅ | 👍 | Link |
| Oracle (OCI) Functions | 3.11 | GA | FDK | ✅ | ❔ | Min. | Link |
| Tencent Cloud Functions | 3.6 | GA | SCF | Vend in zip | ❔ | Min. | Link |
| Vercel Functions | 3.12 | Beta | HTTP handler or WSGI / ASGI | ✅ | ❔ | 👍 | Link |
Note that the "Free Plan" is intended to represent ongoing free resources i.e. not trials or sign-up credits.
| Free Plan | Bill Limits | First Paid Tier | |
|---|---|---|---|
| Alibaba Cloud Function Compute | 3 month trial with resource limits | ? | Based on requests and resources |
| AWS Lambda | 1m reqs / mo + 400,000 GB-s / mo (based on memory configuration) + data egress (~$0.09 per GB) | 🚫 | $0.20 per 1m reqs + $0.00001667 per GB-s (over free tier) + data egress (~$0.09 per GB) |
| AWS Lambda@Edge | None | 🚫 | $0.60 per 1m reqs + $0.00000625125 per GB-s + egress (~$0.09 per GB) |
| Azure Functions | 1m reqs / mo + 400,000 GB-s / mo + first 100 GB / mo egress | Yes | $0.20 per 1m reqs + $0.000016 per GB-s (over free) + $0.08 per GB egress (over 100 GB) |
| Cloudflare Workers | 100k reqs / day, 10ms CPU / req | ? | $20 / mo for 10m reqs / mo, 30ms CPU / req + $0.02 per million CPU ms |
| Fermyon | 100k reqs + 5GB egress | NA | 1m reqs + 50GB egress at $20 / mo |
| Fly.io | 3 shared-cpu-1x 256mb VMs + 100GB egress | NA | Depends on VM + $0.02 per GB egress (over free, min $5 / mo) + $0.15 per GB / mo stopped VMs |
| Google / Firebase Cloud Functions | 2m / mo reqs + 400k / mo GB-s + 200k / mo CPU-s + 5 GB / mo egress | Yes | $0.40 per 1m reqs + $0.0000025 per GB-s + $0.0000100 per CPU-s + $0.12 per GB egress |
| IBM Code Engine | 100k vCPU-s + 200k GB-s + 100k reqs per mo | ? | $0.00003431 / vCPU-s + $0.00000356 / GB-s + $0.538 / 1m reqs |
| Oracle (OCI) Functions | 2m / mo reqs + 400k / mo GB-s | Yes | $0.0000002 per req + $0.00001417 per GB-s |
| Tencent Cloud Functions | 3 month trial with resource limits | ? | $0.0000167 per GB-s + $0.002 per 10k reqs + $0.00000847 per idle GB-s + $0.06 per day + $0.0752 per GB egress |
| Vercel Functions | 100 GB-hrs + 100 GB data transfer | Yes | 1,000 GB-hrs + 1TB data transfer |
reqs = requests, m = million, mo = month, s = seconds, mem = memory, k = thousand, ms = milliseconds
| Memory | Execution Time (s) | Payloads (MB) | Code Size (MB) | Scale Limits | ||||
|---|---|---|---|---|---|---|---|---|
| Default | Max | Default | Max | Request | Response | |||
| Alibaba Cloud Function Compute | 32 GB | 32 GB | 86k | 86k | 32 | ? | 500 | 300 |
| AWS Lambda | 128 MB | 10 GB | 3s | 15min | 6 | 6 | 50 (zip) | 10k per reg. per sec. |
| AWS Lambda@Edge | 128 MB | 3 GB | 3s | 30s | ? | 1 | 50 (zip) | 10k per reg. per sec. |
| Azure Functions | 1.5 GB | 14 GB | 5min | 10min | 100 | ? | ? | 100 inst. |
| Cloudflare Workers | 128 MB | 128 MB | 10ms | 30ms | ? | ? | 1 / 10 | 100 / 500 |
| Fermyon | ? | ? | 30s | 30s | ? | ? | 100 | 1k RPS |
| Fly.io | 256 MB | 128 GB | NA | NA | NA | NA | NA | NA |
| Google / Firebase Cloud Functions | - | 32GB | - | 60min | 32 | 32 | None | 1k RPS / inst. |
| IBM Code Engine | 2 GB | 4 GB | 120s | - | ? | ? | 100 KB | ? |
| Oracle (OCI) Functions | 128 MB | 2 GB | 30s | 300s | ? | ? | ? | 40 GB total mem |
| Tencent Cloud Functions | 64 MB | 3 GB | 1s | 900s | 6 | 6 | 500 (unzip) | 64 GB total mem |
| Vercel Functions | 1 GB | 3 GB | 10s | 300s | ? | ? | 250 (zip) | 1k RPS per 10 sec per reg |
AWS allocates 1 vCPU per 1,769 MB of memory configured.
| SQL DB | No SQL DB | Blob Store | File Hosting | GPU | |
|---|---|---|---|---|---|
| Alibaba Cloud Function Compute | ✅ | ✅ | ✅ | ✅ | ✅ |
| AWS Lambda and Lambda@Edge | ✅ | ✅ | ✅ | ✅ | ✅ |
| Azure Functions | ✅ | ✅ | ✅ | ✅ | ✅ |
| Cloudflare Workers | SQLite | ✅ | ✅ | ✅ | ✅ |
| Fermyon | SQLite | 🚫 | 🚫 | 🚫 | ✅ |
| Fly.io | ✅ | ✅ | 🚫 | 🚫 | ✅ |
| Google / Firebase Cloud Functions | ✅ | ✅ | ✅ | ✅ | ✅ |
| IBM Code Engine | ✅ | ✅ | ✅ | ✅ | ✅ |
| Oracle (OCI) Functions | ✅ | ✅ | ✅ | ✅ | ✅ |
| Tencent Cloud Functions | ✅ | ✅ | ✅ | ✅ | ✅ |
| Vercel Functions | ✅ | ✅ | ✅ | ✅ | 🚫 |
TODO: Need a benchmark suite for Python, see this JS suite
| PoPs (if edge) or regions | Uptime | Cold Response (ms) | Warm Response (ms) | Overhead (ms) | |
|---|---|---|---|---|---|
| Alibaba Cloud Function Compute | |||||
| AWS Lambda | |||||
| AWS Lambda@Edge | |||||
| Azure Functions | |||||
| Fermyon | |||||
| Fly.io | |||||
| Google / Firebase Cloud Functions | |||||
| IBM Code Engine | |||||
| Oracle (OCI) Functions | |||||
| Tencent Cloud Functions | |||||
| Vercel Functions |
TODO: e.g. compliance certifications, data encryption, and network security options
See also awesome serverless security
| Ours | Forum | SO | |||
|---|---|---|---|---|---|
| Alibaba Cloud Function Compute | Link | Forum | SO | r/AlibabCloud | |
| AWS Lambda and Lambda@Edge | Link | re:Post | SO | r/aws | |
| Azure Functions | Link | Forum | SO | r/AZURE | |
| Cloudflare Workers | Link | Forum | SO | r/CloudFlare | |
| Fermyon | Link | Discord | Feedback | SO | |
| Fly.io | Link | Forum | SO | ||
| Google / Firebase Cloud Functions | Link | Group | SO | r/Firebase and r/googlecloud | |
| IBM Code Engine | Link | Slack | SO | ||
| Oracle (OCI) Functions | Link | Forum | SO | r/oraclecloud | |
| Vercel Functions | Link | Help | SO | r/Vercel |