The Open Observatory of Network Interference (OONI) is a non-profit free software project that empowers decentralized efforts in documenting internet censorship worldwide. It provides free software tools for users to test their internet connection quality, detect censorship, and measure network interference. OONI uses ClickHouse for handling large volumes of data, as its data storage and analytics engine. The organization was established more than ten years ago to increase transparency about internet censorship worldwide. OONI collects the data generated by its global network of volunteers, analyzes it, publishes it as open data, and produces research that contextualizes the findings within specific countries, regions, and ongoing social or political events. By switching to ClickHouse, they improved their architecture for faster data access and analysis, allowing real-time publication of measurements and aiding human rights defenders in rapidly responding to censorship events around the world.