The short version

Every vendor below requires its own UI to configure a commission plan. CompCode is the only one where plans are created and versioned via API. Prices shown at 25 reps; sources and working API examples in each full comparison.

VendorPrice (25 reps)Free tierSetupPlan config API
CompCode $199/mo flat 10 reps, full engine 1–3 days Full REST API
CaptivateIQ ~$4,200/mo None 6–12 weeks UI only
Everstage Custom quote None ~8 weeks (G2 median) UI only
QuotaPath $1,150/mo None 1–2 weeks UI only
Spiff ~$1,875/mo Spiff Lite (limited) 4–8 weeks UI only
Xactly ~$1,500/mo None 8–16 weeks UI only