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.
Glossary terms that show up in this comparison.
See how public B2B SaaS companies actually perform on these metrics, with full historical time series.