ChurnZero API
ChurnZero exposes a documented OData v4 REST API covering accounts, contacts, events, and NPS, plus an inbound event-ingestion API. Keys generate in the admin UI, but the developer reference sits behind a paid tenant login. There is no SDK, no outbound webhooks, and rate limits are undocumented.
Frequently asked questions
ChurnZero scores D on the API Report Card. ChurnZero exposes a documented OData v4 REST API covering accounts, contacts, events, and NPS, plus an inbound event-ingestion API. Keys generate in the admin UI, but the developer reference sits behind a paid tenant login. There is no SDK, no outbound webhooks, and rate limits are undocumented.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
ChurnZero is a cloud-based customer success platform that helps SaaS and subscription businesses reduce churn, drive expansion, and scale their CS operations.
Vertical: Customer success / post-sale revenue retention software (horizontal SaaS, not industry-specific). Customer success managers log in daily to triage their book of business by health score, work through assigned 'Plays' (automated CS workflows triggered by usage drops, renewal proximity, NPS detractor responses, etc.), prep for QBRs using account timelines, and send personalized outreach (often AI-drafted).
ChurnZero is one of the three dominant customer success platforms (Gainsight, Totango, ChurnZero) and is the most-installed customer success platform in the HubSpot App Marketplace, where it ranks as a top 30 app.
Yes, for any SaaS business that runs its CS function on it, ChurnZero is the system of record for the entire post-sale customer relationship: every account and contact with hierarchy and ownership, computed health scores and the underlying signals (product usage events, support ticket counts, NPS/CSAT scores, contract dates, invoice/MRR data), every CSM activity (logged calls, emails, meetings, notes), journey/lifecycle stage history, play execution history, in-app survey and message responses, renewal and expansion forecasts, segment definitions, and bidirectional CRM mappings to Salesforce/HubSpot.
Founded 2015 in Washington D.C. by You Mon Tsang (CEO, ex-Vocus). Raised an $80M Series B led by JMI Equity in 2021, bringing total funding to ~$105M at a reported >$500M valuation. The company has scaled to 400+ employees and 1,500+ customers.
No official SDK in any language, all integrations are raw HTTP against the OData endpoint. No documented outbound webhooks for account/contact lifecycle events, customers must poll the OData API or use Fivetran/Hightouch for state changes. Full sourced list under Sources below.
Common alternatives include Gainsight, Totango, Catalyst, Planhat, Vitally, Custify. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.