Owns adoption, value realization, customer outcomes. Goal: ensure success → drives retention.
Owns relationship, contract, expansion deals. Goal: grow account → drives ARR.
Some companies use BOTH roles — CSM owns adoption, AM owns deals (HubSpot, Salesforce). Some collapse them into one (Datadog, MongoDB). When collapsed, the role typically reports to CRO and is comp'd on expansion + retention combined. Pure CS-led shops report to CCO and prioritize retention as the leading indicator.
See how public B2B SaaS companies actually perform on these metrics, with full historical time series.