Everything a campaign team needs to stop double-touching a list.
Signalstack is a data layer for multichannel outreach: one master contact per person, one timeline per contact, one suppression list that respects every channel's rules.
Import pipeline
Multi-step wizard maps CSV columns to canonical fields once. Saved mappings run every subsequent import in one click.
Deterministic matching
Exact matches on normalized email, E.164 phone, and vendor IDs merge silently. Anything ambiguous is queued for review.
Match review queue
Side-by-side raw row vs. proposed contact. Accept, reject, create new, merge, or ignore — one keystroke each.
Unified timeline
Every touch across email, phone, and SMS appears in one chronological view, filterable by channel and date.
Suppression engine
Positive replies suppress the responding channels. STOP suppresses SMS. Conversions suppress everything. All rules per-campaign configurable.
Recommended next action
A rule-based recommendation per contact per campaign. Every recommendation carries a plain-English reason.