Udger

Udger provides user-agent string and IP address detection. Its local parser is an open-source client (PHP, Java and others) that runs on the customer's own servers with downloadable detection data, and its cloud parser is an online API. The data covers browsers, operating systems, devices, icons, crawlers and bots, plus IP lists such as public proxies, Tor exit nodes, VPN services, data center ranges and known attack sources.

Customers are developers and businesses that use the detection for bot and crawler protection, sending mobile users to mobile sites, custom content serving, analytics, spambot detection and advertising. The company sells subscriptions. The cloud parser has a free tier of 500 queries per month and paid tiers from 5 € to 40 € per month, with query limits up to 2,500,000 per month. The local data subscription costs 40 € per month or 400 € per year.

Udger s.r.o. is registered in Milešov, Czech Republic, and was founded in 2015. Its predecessor project, user-agent-string.info, began in 2005 and was free to use until 2014. The company describes itself as a small team in the centre of the Czech Republic.

Product: Local user-agent and IP detection parser with downloadable data, and a cloud parser API, sold as subscriptions.