🤖 Overview

Kalooga is a visual search engine crawler operated by the Danish company Kalooga ApS, founded in 2008. Its primary purpose is to index images and web content to power the Kalooga image search platform, which allows users to find visually similar images and discover content across the web. The bot collects publicly accessible media files and metadata to improve the relevance of visual search results.

🌐 Technical Behavior

The KaloogaBot crawls by following links from seed URLs and sitemaps, focusing on pages with images, videos, and other media. It requests resources at a moderate rate, typically with a reported crawl delay of 5–10 seconds between consecutive requests to avoid overwhelming servers. The bot uses HTTP/1.1 and respects Last-Modified and ETag headers to avoid re-downloading unchanged content. IP ranges originate from the Netherlands and Denmark (ASN 396982 and ASN 197071) and are dynamically allocated, though consistent with the Kalooga infrastructure. It does not use JavaScript rendering and parses HTML and CSS only for image references.

📋 robots.txt Compliance

KaloogaBot is documented to honor Disallow directives in robots.txt and also supports the Crawl-Delay directive. Official guidelines on the Kalooga website (kalooga.com/robots.txt) confirm that it checks for per-path exclusions and respects Allow overrides. No known violations of robots.txt have been reported in security advisories or community discussions.

🔍 Detection Indicators

The primary User‑Agent string is "KaloogaBot" (e.g., Mozilla/5.0 (compatible; KaloogaBot; +http://www.kalooga.com/info.html)). It also sends a From header with the operator email and a User-Agent field that may include the version number. No other identifying headers are standard, but the bot consistently includes a Referer field pointing to the page from which the link was followed.

📊 Data Usage

Collected image URLs, metadata (alt text, captions, dimensions), and page context are used to populate the Kalooga visual search index. This index enables users to perform reverse image searches, find similar visual content, and explore related media. The data is not used for AI model training; it solely supports the public image search service.

⚙️ Rate Limiting Policy

KaloogaBot is rate‑limited because its crawling, though polite, can still generate significant load on heavily trafficked media sites. Threshold‑based blocking (e.g., 30 requests per minute) is recommended to maintain server performance while allowing the legitimate bot to access content valuable for visual search indexing.

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