The dark funnel is the portion of a buyer’s research and decision-making process that happens outside the direct view of sales and marketing teams. It includes conversations on Slack, Teams, private Slack groups, internal emails, phone calls, Zoom meetings between account team members, conversations with peers at other companies, Reddit threads, private Discord communities, analyst calls, and word-of-mouth recommendations. It’s called “dark” not because anything nefarious is happening, but because it’s invisible to standard marketing and sales tracking systems.