Fly.io vs Spider Cloud

Side-by-side comparison of features, pricing, and ratings

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At a glance

DimensionFly.ioSpider Cloud
PricingFree tier includes $5/mo credit; usage-based beyondPay-as-you-go, credits-based; free tier available
Primary UseDeploy and run any code in isolated sandboxesWeb crawling and data extraction for AI agents
Ease of UseCLI-based, auto-generates containers for popular frameworksSingle API, SDKs for Python/Node.js/Rust
Target AudienceDevelopers deploying distributed systems or untrusted codeAI developers needing web data for RAG/LLMs
Unique FeatureSprites sandboxes for safe AI-generated code, hardware isolationAI-native output (markdown/JSON), anti-bot bypass with 199 proxies
IntegrationsNone listedLangChain, LlamaIndex, CrewAI, AutoGen, etc.

Choose Spider Cloud if your primary need is extracting clean web data for AI agents or RAG pipelines — it offers unmatched throughput and structured output. Choose Fly.io if you need to deploy and scale custom applications or run untrusted AI-generated code in isolated sandboxes with global low-latency.

Fly.io
Fly.io

Platform for devs to deploy any code in hardware-isolated sandboxes.

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Spider Cloud
Spider Cloud

Fastest web crawler API for AI agents — Rust-based, pay-as-you-go, 99.9% success rate.

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Pricing
Paid
Paid
Plans
$5
$25
$100
$500
$1,000
$2,000
Popularity
0 views
7.5k views
Skill Level
Beginner-friendly
Intermediate
API Available
Platforms
APICLIWeb
Categories
💻 Code & Development⚙️ Developer Infrastructure
💻 Code & Development📊 Data & Analytics🔬 Research & Education
Features
Hardware-virtualized Fly Machines launch instantly
Sprites sandboxes for safe AI-generated code
Zero-downtime deploys
Autoscaling from one to tens of thousands of instances
Private networking per sandbox with end-to-end encryption
Granular routing
Fast local NVMe storage
Global durable object storage
18 deployment regions worldwide
CLI auto-generates containers for popular frameworks
KVM hardware isolation on own metal
Memory-safe Rust and Go stack
SOC2 Type 2 attested
CI/CD integration
Support for Ruby, Python, Node, Elixir, .NET
Crawl, scrape, and search the web via single API
AI-native output: markdown, JSON, screenshots from rendered DOM
100K+ pages per second throughput
199 proxy countries with stealth anti-bot bypass
Open-source Rust engine (MIT license) for self-hosting
Headless browser with CDP and BiDi protocol support
AI extraction with two-phase fallback and schema enforcement
Data connectors to S3, GCS, Azure Blob, Supabase, Google Sheets
Relevance gate: skip irrelevant pages before charging credits
Webhooks and real-time streaming of crawl results
Works with LangChain, LlamaIndex, CrewAI, AutoGen, Agno
Built-in scheduler and rate limiting per URL per minute
Robots.txt compliance toggle
Failed requests cost nothing
MCP Server for Claude, Cursor, Windsurf
Integrations
LangChain
LlamaIndex
CrewAI
AutoGen
Agno
FlowiseAI
Zapier
n8n
MCP
Python SDK
Node.js SDK
Rust SDK
REST API

Feature-by-feature

Spider Cloud focuses on web data extraction with a Rust-based engine that handles 100K+ pages per second and 99.9% success rate. It provides AI-native output (markdown, JSON, screenshots) and anti-bot bypass via 199 proxy countries. Key features include headless browser automation, AI extraction with schema enforcement, and relevance gating to skip irrelevant pages before billing. It integrates with major AI frameworks like LangChain, LlamaIndex, and CrewAI. Fly.io, on the other hand, is a compute platform for deploying any code in hardware-isolated sandboxes with KVM virtualization. It offers Fly Machines that launch instantly and autoscale, private networking, global storage, and Sprites sandboxes specifically for running AI-generated code safely. Fly.io provides zero-downtime deploys, 18 regions worldwide, and supports any framework via CLI auto-generated containers. It lacks web scraping features but excels in running custom applications. While both target developers, Spider Cloud is a specialized data extraction API, whereas Fly.io is a general-purpose deployment platform.

Pricing compared

Spider Cloud uses a pay-as-you-go credits model with a free tier (limited usage). Pricing is based on credits consumed per request, with no mention of specific tiers. Enterprise options are available. Fly.io offers a free tier with a $5/mo compute credit, plus additional free allowances for bandwidth, storage, and certain services. Beyond that, pricing is usage-based for compute, storage, and egress. Both are consumption-based, but Spider Cloud's pricing is tied to data extraction volume, while Fly.io's is tied to compute resources and network usage. For heavy scraping workloads, Spider Cloud may cost less than running a scraping infrastructure on Fly.io. However, for deploying a custom app, Fly.io's free tier is generous.

Who should pick which

  • AI RAG developer
    Pick: Spider Cloud

    Spider Cloud provides structured data extraction and integrates directly with LangChain and LlamaIndex, perfect for building retrieval-augmented generation pipelines.

  • Solo founder deploying a web app
    Pick: Fly.io

    Fly.io's free tier and auto-scaling make it easy to deploy any framework globally with minimal configuration.

  • LLM researcher collecting datasets
    Pick: Spider Cloud

    Spider Cloud can crawl 100K+ pages per second and output clean markdown/JSON, ideal for training data collection.

  • Developer running untrusted AI code
    Pick: Fly.io

    Fly.io's Sprites sandboxes provide hardware isolation for executing AI-generated code safely.

  • Enterprise needing dedicated scraping infrastructure
    Pick: Spider Cloud

    Spider Cloud offers 199 proxy countries, anti-bot bypass, and data connectors to cloud storage for scalable scraping.

Frequently Asked Questions

Can Spider Cloud be self-hosted?

Yes, the crawler engine is open-source (MIT) on GitHub, allowing self-hosting.

Does Fly.io support databases?

Yes, it supports clustered databases like Cockroach and globally-distributed Postgres with private networking.

Which tool is better for RAG pipelines?

Spider Cloud is better due to its AI-native output and integrations with LangChain and LlamaIndex.

Can I run Python/Node apps on Fly.io?

Yes, Fly.io supports any framework via CLI auto-generated containers, including Node, Django, and .NET.

Does Spider Cloud have a free tier?

Yes, it offers a free tier with limited credits, but for substantial usage it is pay-as-you-go.

What is Fly.io's free tier?

It includes a $5/mo credit for compute and free allowances for bandwidth and storage.

Can Spider Cloud handle JavaScript-rendered pages?

Yes, it uses a headless browser with CDP and BiDi protocol support for dynamic content.

Is Fly.io SOC2 compliant?

Yes, Fly.io is SOC2 Type 2 certified.

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