Collaborative search has been an active area of research within the IR community for many years. While for "single-user'' research a variety of up-to-date open-source search systems exist, few "multi-user'' search tools are open-source and even fewer are being maintained. In this paper, we present SearchX, an open-source collaborative search system we are currently developing-and using for our research. We designed and built SearchX using the modern Web stack (and are thus not siloed by an operating system or a particular browser type), enabling efficient research across platforms (Desktop, mobile) and with online users (e.g. crowdworkers). A video, describing the demo can be found at https: //www.youtube.com/watch?v=uf24m6p3vts.@en

Collaborative search is an active area of research in the IR community (and has been for many years)—despite this, there is a lack of open-source tools available to jump-start research in collaborative search. It is common for collaborative search researchers to implement their own tooling, leading to unnecessary duplicate engineering efforts. In this work, we describe the design process and challenges in implementing SearchX, an open-source collaborative search system, built using modern Web standards. SearchX implements essential features of collaborative search as found in the literature. In the design process, we focused on providing support for modern research needs (such as running crowdsourcing experiments and fast prototyping). We open-sourced SearchX https://github.com/felipemoraes/searchx-frontend (front-end) and https://github.com/felipemoraes/searchx-backend (back-end). @en