Buying signal typesFive signal sources. One fit lens.
Vendors use different taxonomies. This model separates behavior, external research, organizational change, people events, and fit so teams can choose the right action.
01First-party engagement
Signals from channels you control: repeated product or pricing visits, comparison-page returns, forms, webinar questions, replies, and meaningful trial usage. These are easier to connect to known interactions, but one-off or anonymous activity can still be ambiguous.
02External research and intent
Category research, review-site activity, vendor comparisons, competitor research, and public engagement with competitor content can reveal demand before a prospect contacts you. Public engagement is still ambiguous: it may reflect education, employment, partnership, or general interest rather than active evaluation. Many external sources identify the account rather than a named person.
03Company change and triggers
Funding, expansion, rapid hiring, leadership changes, product launches, compliance deadlines, and technology replacements can create a need or budget window. The event matters only when it connects to the problem you solve.
04People and relationships
A new executive, a former champion joining a target account, a prospect posting about a problem, or a decision-maker engaging publicly can provide timely, person-level context for relevant outreach.
05Product and customer activity
Trial depth, activation milestones, usage changes, stakeholder growth, and support patterns can reveal evaluation, expansion, adoption, or retention needs when the activity is meaningful and attributable.
06Fit and context
Industry, company size, geography, role, business model, and technology environment do not prove interest. They determine whether observed activity is commercially relevant enough to act on.
Gartner recommends checking that intent accounts match the target market and mapping signals to internal segments. In practice, fit is the gate: strong activity from the wrong account should not outrank relevant activity from an ideal customer. Review the source.