Both models promise pipeline. The difference is who holds the risk while it shows up. An agency retainer ($3k–$10k/month, usually quarterly terms) bills for effort; pay-per-result bills for outcomes. Neither is universally better — but they're rarely compared honestly, because one side writes most of the comparisons.
Side by side
- Cost shape. Agency: fixed monthly, regardless of output — great when output is high, painful when it isn't. Pay-per-result: $0 baseline, fixed price per verified deliverable ($10/lead, $250/held meeting at Forward). Your worst month costs nothing.
- Risk. Agency: you carry it — the retainer is due whether or not the quarter produced. Pay-per-result: the vendor carries it; failed verification is never billed and a missed SLA closes the engagement free.
- Speed. Agencies onboard in 2–6 weeks (kickoffs, strategy decks). Pay-per-result starts when the brief is accepted — minutes if the ICP is ready.
- Quality control. Agency: monthly review calls and subjective judgment. Pay-per-result: acceptance criteria you wrote, machine-checked per result, evidence attached. Disputes are data.
- Strategy. The agency's real edge. A good agency brings positioning, messaging, and channel strategy. Pay-per-result executes against the ICP you define — it won't tell you the ICP is wrong (though reply-rate data will).
When the agency wins
You don't know your ICP yet, you need messaging built from scratch, or you're buying senior strategy as much as execution. A retainer that includes real strategic work can be worth it — judge it on the strategy, not the lead count.
When pay-per-result wins
You know who you sell to and need volume against that definition; you need bounded downside; you want to start this week; or you've been burned by a retainer that produced reports instead of meetings. Test the difference cheaply: write your ICP, take the free $25 in starter credits, and compare cost per qualified result against your current invoice. The math settles the argument either way.