Every company that outgrows founder-led hiring faces the same question: who — or what — does the sourcing? The 2026 answer set has four options: hire sourcers, retain agencies, contract RPO, or deploy agents. Costs and fit differ enormously; here's the framework.
Option 1: in-house sourcers. A dedicated sourcer runs $70K–$120K+ loaded, covers 15–25 concurrent searches, and compounds: they learn your bar, build talent maps, and create institutional knowledge. The catch is utilization — sourcing demand is spiky, and a sourcer sized for peak sits idle in troughs. Right when: sustained hiring volume (30+ roles/year), and you're ready to invest in tooling (a database seat plus CRM) to make them productive.
Option 2: agencies. Contingency fees run 20–25% of first-year salary — $30K–$50K per professional hire — and you're renting the agency's network and speed, not building anything. Economically rational for executive searches, one-off scarce skills, and markets you don't know. Economically brutal as a volume strategy: ten agency hires can cost more than a sourcer's fully-loaded year.
Option 3: RPO. Recruitment process outsourcing embeds an external team against a monthly fee (commonly $10K–$50K+/month by scope). It buys elastic capacity fast — the classic use is a hiring surge or a new geography. The tradeoffs: process control, candidate-experience variance, and the knowledge walking out when the contract ends.
Option 4: agents. The new entrant. Autonomous agents (Noon, HeroHunt at the self-serve end) run the search-screen-outreach loop for roughly $12K–$40K/year — a fraction of a sourcer's cost — and scale concurrent searches without payroll. What they don't do: own hiring-manager relationships, close candidates, or exercise judgment on ambiguous briefs. They're sourcing capacity, not recruiting leadership. (Full cost model in our agentic ROI analysis.)
The hybrids that work in practice: Startup (5–20 hires/year): a recruiting-savvy hiring manager + Dover-style automation or an agent, agencies only for executives. Scale-up (30–80): one in-house recruiter owning process + an agent doing volume sourcing + agency for 2–3 leadership searches — this pattern increasingly replaces "recruiter plus two sourcers." Enterprise: in-house team on strategic roles, RPO for surges, agents piloted per business unit, and serious rediscovery before any external spend.
The trendline is clear: sourcing labor is unbundling from recruiting judgment. The judgment — calibrating bars, managing stakeholders, closing — stays human and moves up-market. The searching itself is becoming infrastructure you buy, not headcount you hire.