Modal vs Scrapfly
Comparing architecture, runtime limits, open-source licenses, and monthly costs for autonomous agent pipelines.
Detailed Specifications & Compatibility Matrix
Extracted directly from GitHub REST API & official developer documentation
| Technical Feature / Metric | Modal | Scrapfly |
|---|---|---|
| Developer / Organization | Modal Labs Inc. (Erik Bernhardsson) | Scrapfly SAS |
| Open-Source Engine | ✓ Open Source (Apache-2.0) | ✕ Proprietary Cloud |
| GitHub Stars (Repo/SDK) | ★ 528 GitHub Stars | Proprietary / Closed Core |
| Core Repository Language | Python | Cloud API |
| Supported SDK Clients | ||
| Self-Hosted Deployment | Hosted Only | Hosted Only |
| Docker / Container Ready | ✓ Official Image | Managed |
| Model Context Protocol (MCP) | ✓ Native MCP | ✓ Native MCP |
| Billing Architecture | usage based | usage based |
| Developer Free Tier | ✓ Yes $30 USD in free compute credits every month | ✓ Yes 1,000 free API credits |
| Entry Paid Tier (Monthly) | Free / Custom | $30 USD / mo |
| Pricing & Cost Architecture | Every user receives $30/month in free compute credits perpetually. Pay-as-you-go CPU starts at $0.000015/core-second; NVIDIA GPUs (T4 to H100) are metered per millisecond. | Free trial provides 1,000 initial API credits. Discovery plan starts at $30/mo for 200,000 API credits (basic request = 1 credit; JS rendering + residential proxy = 5-25 credits). |
| Key Engineering Insight | Founded by Erik Bernhardsson (former CTO of Better and creator of Spotify's Annoy algorithm); designed to make cloud infrastructure and GPU clusters feel as seamless as a local Python import. | Uses custom-patched Chromium instances to mimic real residential JA3/TLS browser fingerprints, bypassing Cloudflare Turnstile and DataDome automatically. |
Strengths & Trade-Offs
Objective engineering evaluation of both platforms
Modal Evaluation
Key Advantages
- ✓ Pure Python infrastructure as code: define container images and cloud jobs using simple '@app.function' decorators
- ✓ Sub-2 second container cold starts with on-demand access to NVIDIA A100, H100, and L4 GPUs without provisioning
- ✓ Automated horizontal scaling across thousands of parallel workers with built-in queueing and output streaming
Limitations & Trade-Offs
- ✕ Proprietary cloud runtime with no self-hosted on-premise execution engine available
- ✕ Workloads must be structured around Modal's Python decorator conventions and cloud serialization rules
Scrapfly Evaluation
Key Advantages
- ✓ Advanced Anti-Scraping Protection (ASP) with automated residential proxy rotation and CAPTCHA solving
- ✓ Direct markdown format extraction parameter (&format=markdown) built specifically for LLM ingestion
- ✓ Full JavaScript rendering engine supporting custom pre-scrape evaluate scripts and scroll triggers
Limitations & Trade-Offs
- ✕ Advanced proxy and headless browser features consume between 5 and 25 API credits per request
- ✕ Strictly cloud-hosted API; no on-premise Docker deployment option
Source Quotes
Direct excerpts from official documentation backing our extracted specifications
Modal Documentation Proof
"Pay-as-you-go CPU from $0.000015/core-second; GPU compute metered per millisecond."
"Every account gets $30/month in free credits renewing monthly."
"Hosted serverless cloud execution platform managed by Modal Labs."
Scrapfly Documentation Proof
"Discovery plan starts at $30/mo with 200,000 API credits and unlimited concurrency."
"Free trial includes 1,000 credits to test all features and proxy networks."
"Fully managed cloud infrastructure; integrations available via SDKs and REST."
Frequently Asked Questions: Modal vs Scrapfly
Architectural trade-offs and decision criteria
Is Modal or Scrapfly cheaper for developers?
Modal has a starting price of $0/mo (usage based), while Scrapfly starts at $30/mo (usage based). Modal includes a free tier ($30 USD in free compute credits every month). Scrapfly offers a free tier (1,000 free API credits).
Can I self-host Modal and Scrapfly in my own infrastructure?
Modal is a cloud-managed service only. In comparison, Scrapfly is proprietary cloud infrastructure.
Do Modal and Scrapfly support the Model Context Protocol (MCP)?
Modal has native support for MCP servers. Scrapfly fully supports Model Context Protocol integrations.
Which programming languages have official SDKs for Modal vs Scrapfly?
Modal provides official SDKs in: python. Meanwhile, Scrapfly supports: python, typescript, go, curl.