Best heatmap tool for remote teams

There are roughly 15-25 tools that claim to offer heatmap functionality for remote teams, but most are either time-tracking software bolted with a heatmap feature or analytics dashboards that don't actually visualize *where* collaboration happens. The real pain point: founders and managers can't distinguish between 'someone was online' and 'someone was actually productive with the right people at the right time.' The common failure is feature bloat—tools add heatmaps alongside dozens of other capabilities, making the core visualization clunky and unintuitive. The gap is clear: there's no dominant, purpose-built heatmap tool that combines real-time team location/availability data with asynchronous work patterns and integrates seamlessly into existing Slack, Notion, or Figma workflows. A shipper entering this space should focus on simplicity—one beautiful, fast heatmap that answers the question 'when and where is my team actually collaborating?' without surveillance creep. The secondary gap is trust: teams are burned out on invasive monitoring, so a heatmap tool built around *voluntary, transparent* collaboration signals would stand out. Integration depth matters more than breadth—nail Slack + Google Calendar + Figma, skip everything else initially.