StormCrawler is an open-source collection of resources for building low-latency, scalable web crawlers on Apache Storm.

StormCrawler is modular and consists of a core module, which provides the basic building blocks of a web crawler such as fetching, parsing, URL filtering.

Apart from the core components, the project also provides external resources, like for instance spout and bolts for Elasticsearch and Apache Solr or a ParserBolt which uses Apache Tika to parse various document formats.

The project is used by various organisations,[2] notably Common Crawl[3] for generating a large and publicly available dataset of news.

[6] Several research papers mentioned the use of StormCrawler, in particular: The project Wiki contains a list of videos and slides available online.