Custify API
Custify exposes a self-serve REST API covering people, companies, events, tickets, deals, invoices, and custom objects, keyed by an API token from the admin UI. Docs are thin, official SDKs are absent, and rate limits are undocumented; event workflows mostly route through Zapier or Make.
Frequently asked questions
Custify scores B on the API Report Card. Custify exposes a self-serve REST API covering people, companies, events, tickets, deals, invoices, and custom objects, keyed by an API token from the admin UI. Docs are thin, official SDKs are absent, and rate limits are undocumented; event workflows mostly route through Zapier or Make.
Custify has a workable official integration path. Most engineering teams can build against it directly. Solid API with minor gaps
Custify is a customer success platform built for B2B SaaS companies that helps customer success teams monitor account health, prevent churn, and identify expansion opportunities.
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 tasks and playbook steps (automated CS workflows triggered by usage drops, low NPS scores, renewal proximity, billing events, etc.), prep for QBRs using the Customer 360 timeline, and send personalized outreach (increasingly AI-drafted via CustifyAI).
Custify is a known, credible player in the dedicated customer success software category but is materially smaller than the top three (Gainsight, Totango, ChurnZero) on every measurable dimension.
Yes, for any SaaS business that runs its customer success function on Custify, it is the system of record for the entire post-sale customer relationship: every account and contact with ownership and lifecycle stage, computed health scores and the underlying signals (product usage events, support ticket counts, NPS/CSAT responses, MRR/invoice data, subscription state), every CSM activity (logged tasks, notes, calls, meetings), playbook execution history, in-app survey responses, renewal and expansion forecasts, segment definitions, and bidirectional CRM mappings to HubSpot/Salesforce/Pipedrive.
Founded 2017 in Bucharest, Romania by Philipp Wolf (CEO), Boris Cipot, and Thomas Wegele as Custify SRL.
No official SDK published in any language, all integrations are raw HTTP against the REST endpoint. API documentation site (docs.custify.com) is sparse and lightly indexed, much of the developer guidance is buried in third-party connector docs (Segment, RudderStack, Make) rather than first-party reference material. Full sourced list under Sources below.
Common alternatives include Gainsight, Totango, ChurnZero, Catalyst, Planhat, Vitally. 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.