Compare
Row-by-row against the tools you are evaluating, with their public figures cited.
RB2B pioneered person-level visitor ID for B2B. We copied what works and fixed what their own customers complain about: gating, credits that die, US-only, six-filter ICP, no outreach context, no accuracy feedback loop.
Retention.com (Retention FLEX) is the incumbent for Shopify list growth and abandonment recovery. The complaints are consistent: hidden pricing, annual floors, attribution that counts every later order, deliverability damage, and cancellation friction.
MoltSets is a strong API-only contact database at a low flat price. Its founder said the no-UI decision excludes 95% of buyers. We ship the same price model with a UI, and fix the gating and refund policy.
Apollo sells seats and credits. If what you need is contact data in your own tools, you are paying for a sequencer and a dialer you may not use.
Opensend prices per identity with tiers from $400/mo. Our flat tiers include everything and the attribution is holdout-proven.
Wunderkind is a managed service on annual auto-renewing contracts with revenue-share pricing. We are self-serve, month-to-month, and the data lives in your ESP.