Runtime vs Spider Cloud
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Runtime | Spider Cloud |
|---|---|---|
| Core Purpose | Agent orchestration & resilience runtime | Web crawling & scraping API for AI agents |
| Key Differentiator | State persistence, automatic retry, infinite parallel scaling | Rust engine, Browser AI commands, AI extraction with fallback |
| Target User | Developers building production Python agents | AI/LLM teams needing real-time web data |
| Open Source | Yes | Open-source core on GitHub |
| Latest News Impact | Perry compiles TS to native binaries, ClojureWasm (no JVM) - runtime ecosystem evolving | Browser AI commands (Act, Extract, Observe) now live via WebSocket |
Runtime and Spider Cloud serve fundamentally different needs. Choose Runtime if you are a developer building resilient, scalable multi-step AI agents that require state management and failure recovery – it is free and lightweight. Choose Spider Cloud if your primary need is fast, reliable web data extraction for AI/LLM pipelines, with benefits like 99.9% success rate, pay-per-use pricing, and recently added Browser AI commands.
Open-source reliability runtime for Python AI agents with retries and infinite parallel scaling.
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Spider Cloud is an AI web scraping API that turns any site into markdown or JSON for agents and RAG.
Visit WebsiteWho should pick which
- Solo founder building an AI agent for task automationPick: Runtime
Free, open-source, and designed for resilient multi-step agents. State persistence and retry logic reduce debugging effort.
- LLM engineer needing up-to-date web data for RAG pipelinePick: Spider Cloud
Spider Cloud's Rust engine provides fast, reliable crawling with structured output. Integrations with LangChain and LlamaIndex simplify pipeline building.
- Enterprise team deploying high-volume agentic workflowsPick: Runtime
Runtime's infinite parallel scaling and distributed compute support handle large loads without licensing costs.
- Developer scraping complex sites with anti-bot measuresPick: Spider Cloud
Browser Cloud with stealth anti-detection, Browser AI commands, and unblocker endpoint are tailored for challenging scraping tasks.
- Startup prototyping agent orchestration with minimal overheadPick: Runtime
Runtime's lightweight footprint and visual dashboard accelerate development without heavy infrastructure.
Frequently Asked Questions
Runtime vs Spider Cloud: which should you choose?
Runtime and Spider Cloud serve fundamentally different needs. Choose Runtime if you are a developer building resilient, scalable multi-step AI agents that require state management and failure recovery – it is free and lightweight. Choose Spider Cloud if your primary need is fast, reliable web data extraction for AI/LLM pipelines, with benefits like 99.9% success rate, pay-per-use pricing, and recently added Browser AI commands.
What is the core difference between Runtime and Spider Cloud?
Runtime is a free, open-source runtime for building resilient AI agents (orchestration, state management, retry). Spider Cloud is a paid web crawling and scraping API optimized for AI data extraction.
Which tool is better for a RAG pipeline?
Spider Cloud is directly suited – it crawls web pages and outputs structured data (markdown, JSON) that can feed vector stores. Runtime could orchestrate the pipeline but does not scrape itself.
Can Runtime handle web scraping?
Runtime is not a scraper; it orchestrates agent steps. You would need to integrate a scraping library or API within your agent's nodes.
What are the pricing models?
Runtime is free and open-source. Spider Cloud is freemium with pay-as-you-go scraping (~$0.03/1k pages) and optional AI Studio add-on ($6/mo).
Does Spider Cloud offer a free tier?
Yes, Spider Cloud has a free tier with limited pages per month (exact limits not stated here) and an open-source core.
What recent features were added?
Spider Cloud added Browser AI commands (Act, Extract, Observe) in March 2026, a scraper catalog of 1,000+ examples, data connectors, and better AI extraction fallback. Runtime's recent news is about other projects (Perry, ClojureWasm), not Runtime itself.
Which tool is better for a non-technical user?
Neither is ideal. Spider Cloud requires API integration; Runtime requires Python coding. Spider Cloud's AI Studio simplifies crawling with natural language, but both target developers.
Can I self-host Spider Cloud?
Yes, Spider Cloud has an open-source core on GitHub that can be self-hosted, but the cloud version offers higher reliability and features like the Browser Cloud.
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Last reviewed: July 3, 2026