Heretic vs Spider Cloud
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Heretic | Spider Cloud |
|---|---|---|
| Core Purpose | Remove LLM censorship | Web crawling & scraping API |
| Target User | Researchers, power users | AI agents, RAG pipelines |
| Integrations | Python API, CLI | LangChain, LlamaIndex, CrewAI, etc. |
| Output Format | Modified model weights | Markdown, HTML, JSON, CSV, XML, text |
| Latest News | No recent news | Browser AI commands, scraper catalog, data connectors (Feb-Mar 2026) |
Heretic and Spider Cloud serve opposite needs: Heretic is a niche open-source tool removing censorship from LLMs, while Spider Cloud is a scalable scraping API feeding real-time web data to AI pipelines. For unrestricted model access, choose Heretic. For reliable web data extraction, Spider Cloud wins with its Rust engine, 99.9% success rate, and recent additions like Browser AI commands and data connectors.
Free, open-source tool that removes restrictions from language models so they always follow your instructions.
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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
- AI safety researcher studying LLM censorshipPick: Heretic
Heretic directly removes censorship from open-weight models, allowing analysis of model behavior without refusals. Its open-source code and no-telemetry policy support research transparency.
- Developer building a RAG pipeline needing fresh web dataPick: Spider Cloud
Spider Cloud's Rust engine provides fast, reliable scraping with structured output and seamless integration with LangChain/LlamaIndex. Recent data connector support pipes results directly into cloud storage.
- Power user wanting uncensored local LLM for personal usePick: Heretic
Heretic is free, lightweight, and non-intrusive. It patches models like Llama or Mistral to remove refusals while preserving performance, ideal for personal experimentation.
- Startup building AI agents that search and extract web infoPick: Spider Cloud
Spider Cloud offers a comprehensive scraping API with AI Studio for natural language queries, Browser AI commands for interactive browsing, and a 99.9% success rate—critical for agent reliability.
Frequently Asked Questions
Heretic vs Spider Cloud: which should you choose?
Heretic and Spider Cloud serve opposite needs: Heretic is a niche open-source tool removing censorship from LLMs, while Spider Cloud is a scalable scraping API feeding real-time web data to AI pipelines. For unrestricted model access, choose Heretic. For reliable web data extraction, Spider Cloud wins with its Rust engine, 99.9% success rate, and recent additions like Browser AI commands and data connectors.
What exactly does Heretic do to a language model?
Heretic patches or wraps open-weight models to bypass safety filters and content policies, ensuring they don't refuse user instructions. It does not change model performance or coherence.
Can I run Spider Cloud locally?
Yes, Spider Cloud has an open-source core available on GitHub, so you can self-host. The cloud version provides a managed API with higher reliability and features like stealth anti-detection.
Which tools does Spider Cloud integrate with?
LangChain, LlamaIndex, CrewAI, FlowiseAI, AutoGen, Agno, Dify, Google Cloud Storage, Amazon S3, and Supabase. It also has data connectors for S3, GCS, Google Sheets, Azure Blob, and Supabase.
Is Heretic safe to use?
Heretic is open-source (AGPLv3+), has no telemetry, and does not collect data. It is designed for research and personal use. Users should be aware of legal and ethical implications of bypassing model safety measures.
Does Spider Cloud support image scraping?
Yes, Spider Cloud can capture screenshots of pages and extract link data. It also returns content in markdown, HTML, JSON, etc., which can include image URLs.
What are the latest features added to Spider Cloud?
In February-March 2026, Spider Cloud launched Browser AI commands (Act, Extract, Observe via WebSocket), a scraper catalog with 1,000+ examples, data connectors to major cloud services, and improved AI extraction fallback.
How do the pricing models compare?
Heretic is free. Spider Cloud charges per page (avg $0.03 per 1,000 pages) plus optional $6/mo for AI Studio. Failed requests are not billed. No fixed monthly subscription.
Can I use Heretic with cloud-hosted models?
Heretic primarily supports open-weight models that can be run locally. It may not work with proprietary cloud APIs like GPT-4 because those models have server-side controls that cannot be patched.
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Last reviewed: July 3, 2026