Plasmo is best known as a modern framework (and deployment tooling) for building browser extensions quickly, especially for teams that want a strong developer experience and a clear path to shipping. But many “Plasmo alternatives” aren’t extension frameworks at all—they’re purpose-built products that skip custom build work in favor of improving the day-to-day browsing workflow: Workona focuses on project-based workspaces and tab restore, Arc rethinks the entire browser UX with spaces and productivity-oriented layout, while Hoverify, Beep, and WhatRuns target specific jobs like web debugging, in-context collaboration, and tech-stack detection.
In evaluating options, the key considerations were whether you actually need to build an extension versus adopting a ready-made workflow, along with usability and learning curve, performance and reliability at scale, collaboration features, cross-device sync and state/restore behavior, and overall pricing/ROI for individuals and teams.