behindthewand.com

What It Is

Anubis is an anti-scraping protection tool designed for websites. When a site is hit by large-scale data harvesting from AI companies or malicious crawlers—potentially exhausting server resources or even causing outages—Anubis steps in as a defensive layer. It places a verification page in front of the site, filtering and blocking automated crawlers while preserving access resources for legitimate users.

Core Analysis

• Protection method: Its core approach uses a Hashcash-like proof-of-work mechanism. The computational burden for a normal individual user is negligible, but for crawlers operating at massive concurrency, the accumulated compute cost rises sharply, making malicious scraping significantly harder.
• Deployment model: It is integrated as a front-end challenge and relies heavily on modern JavaScript features. At present, it is positioned as a “placeholder solution.” The official roadmap plans to introduce fingerprinting techniques based on characteristics such as font rendering, aiming to identify headless browsers more accurately and reduce disruption for legitimate users.
• Integration compatibility: Because it depends on JavaScript execution, Anubis can conflict with privacy-focused browser extensions such as JShelter. Legitimate users may need to disable such extensions for the domain in order to pass verification, which somewhat compromises user-friendliness.

Pricing

The text does not mention any commercial pricing, open-source license, or paid plan information.

Pros and Cons

Pros: A clever approach that uses very low server-side cost to effectively deter large-scale crawlers; nearly imperceptible for individual users while helping maintain server stability.
Cons: Requires JavaScript, making it unfriendly to users who disable scripts or use certain privacy extensions; at the current stage, it relies only on proof of work and lacks advanced bot fingerprinting, so false positives are possible.

Who It’s For

Owners of small to medium-sized content sites or live-streaming sites suffering from server overloads or crashes caused by large-scale scraping from AI crawlers.

Access from China

Because the verification process requires the browser to run JavaScript-based proof-of-work calculations, high network latency or unstable connections may lengthen the computation and verification cycle, resulting in a somewhat limited experience.