Curl.Md vs Spider Cloud
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Curl.Md | Spider Cloud |
|---|---|---|
| Pricing | Free with generous rate limits; prepaid credits to skip rate limits | Pay-as-you-go from $1/GB bandwidth + compute, AI Studio $6/mo add-on |
| Core Feature | URL-to-optimized markdown, CLI, browser prefix, SDK, token savings | Web crawling & scraping API, AI Studio, Browser AI commands, structured output, screenshot, search endpoint |
| Output Formats | Optimized markdown only | Markdown, HTML, JSON, CSV, XML, plain text |
| Tool Integrations | Amp, Claude, OpenCode, Pi, MCP server | LangChain, LlamaIndex, CrewAI, FlowiseAI, AutoGen, Agno, Dify, S3, GCS, Google Sheets, Azure Blob, Supabase |
| Best For | AI agent developers needing token-efficient markdown, quick URL-to-markdown conversion | AI agents needing real-time web data for RAG, high-volume scraping, structured data extraction |
| Open Source | Yes (MIT License) | Not mentioned; cloud-first with self-host option |
Choose Spider Cloud if your workflow demands heavy-duty scraping with structured output (JSON/CSV/XML), AI-powered extraction, and integrations with RAG pipelines. Choose Curl.Md if your primary need is a lightweight, token-efficient way to convert web pages into clean markdown for LLMs, and you prefer open-source simplicity and zero cost.
AI web scraping API: crawl, scrape, search any site into markdown or JSON at 10k req/min.
Visit WebsiteWhat real users say: Curl.Md vs Spider Cloud
Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.
Curl.Md
33 mentions across 4 sources · 40% positive — mixed
Hacker News, YouTube, Bluesky, GitHub
What users praise
- • Extremely simple to use: just curl curl.md/<url> or use browser prefix.
- • Token-optimized output saves money for heavy AI agent users.
- • Open source under MIT license—transparent and modifiable.
- • Works via CLI, SDK, API, and official agent plugins for Claude, Cursor, etc.
What frustrates them
- • Very limited community feedback—hard to verify claims or reliability.
- • No user testimonials or independent reviews found in the data.
- • Crawl depth and behavior not clearly documented in the sources.
- • Competing methods (Accept header, direct .md files) may suffice for many.
Researched Jul 5, 2026
Spider Cloud
41 mentions across 2 sources · 0% positive — critical
YouTube, Lemmy
What users praise
- • Competitive pay-as-you-go pricing at $1/GB with no expiry.
- • Default rate limit of 10,000 requests per minute is generous.
- • Broad output formats (HTML, markdown, JSON, CSV) cover diverse needs.
- • Integrated Web Search API bundles SERP and extraction for AI agents.
What frustrates them
- • No community feedback to confirm reliability or performance.
- • Self-reported metrics lack independent verification.
- • Stealth browser success may vary across real sites.
- • Potential legal risks from scraping; compliance is user's responsibility.
Researched Aug 26, 2026
Who should pick which
- AI agent developer building a RAG pipelinePick: Spider Cloud
Spider Cloud provides structured outputs (JSON, CSV) and integrates with LangChain, LlamaIndex, and other RAG frameworks, making it ideal for ingesting web data into vector databases at scale.
- Solo developer needing quick markdown from a URL for a chatbotPick: Curl.Md
Curl.Md's browser prefix (curl.md/<url>) and CLI tools allow instant conversion to low-token markdown without any setup, perfect for prototyping and low-volume use.
- Data team scraping thousands of pages for analysisPick: Spider Cloud
Spider Cloud's Rust engine, proxy rotation, and data connectors (S3, GCS, etc.) enable efficient large-scale scraping with structured data output for analytics.
- Non-technical user wanting to feed a website into ChatGPTPick: Curl.Md
Simply prefix a URL with curl.md/ to get markdown that can be pasted into any LLM, requiring no technical skills or API keys.
- Dev team building an agent with Browser AI commandsPick: Spider Cloud
Spider Cloud's Browser AI WebSocket commands (Act, Extract, Observe) allow agents to interact with webpages programmatically, far beyond basic scraping.
Frequently Asked Questions
Curl.Md vs Spider Cloud: which should you choose?
Choose Spider Cloud if your workflow demands heavy-duty scraping with structured output (JSON/CSV/XML), AI-powered extraction, and integrations with RAG pipelines. Choose Curl.Md if your primary need is a lightweight, token-efficient way to convert web pages into clean markdown for LLMs, and you prefer open-source simplicity and zero cost.
Which tool is cheaper for high-volume scraping?
Spider Cloud's average cost is $0.03 per 1,000 pages, making it very affordable at scale. Curl.Md is free with rate limits; prepaid credits are needed for high volume, but overall costs are lower if usage stays within free limits.
Does Curl.Md support structured output like JSON?
No, Curl.Md outputs only optimized markdown. For structured data (JSON, CSV, XML), use Spider Cloud.
Can I use Spider Cloud without a subscription?
Yes, Spider Cloud is pay-as-you-go with no subscription. You add funds (from $1/GB bandwidth + compute) and spend as you go.
Are both tools open source?
Curl.Md is open source under the MIT License. Spider Cloud is a commercial cloud offering, but it does have a self-host option mentioned in its features.
Which tool is better for token savings?
Curl.Md is specifically designed for token optimization, having saved over 3.3B tokens. Spider Cloud offers markdown output but does not emphasize token reduction as a primary feature.
Do either tools support JavaScript rendering?
Spider Cloud includes a Browser Cloud with stealth anti-detection, implying it can handle JavaScript-heavy sites. Curl.Md's conversion is likely based on initial HTML, making it less suitable for SPAs.
Can I integrate these tools with LangChain?
Spider Cloud lists LangChain as an integration. Curl.Md does not list LangChain but offers SDKs and plugins for other agents.
Which tool has better proxy support?
Spider Cloud includes an Unblocker with rotating proxies and automatic retries. Curl.Md does not mention proxy features.
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Last reviewed: July 5, 2026