Corelation's KeyStone platform is the credit union industry's most prominent modern core. Built from scratch with a REST-first architecture, KeyStone has grown rapidly since 2009 — attracting credit unions fed up with aging COBOL-based systems. Corelation now serves 300+ institutions, many of them large, sophisticated CUs that deliberately chose to migrate off Symitar or Fiserv.
The modern, API-first challenger core disrupting legacy providers. Aerial is built to integrate directly with Corelation — your core stays exactly as it is, and your members get a modern account opening experience that converts.
Aerial's Corelation integration uses KeyStone's native REST APIs with OAuth 2.0 token-based authentication. Member lookup, creation, share/loan opening, and funding are handled via KeyStone's documented endpoints — no custom scripting, no middleware. Aerial maps its application data model directly to KeyStone's member and account schema, so the data your staff sees in KeyStone is clean and complete from the moment an application is approved.
KeyStone REST API + OAuth 2.0
Aerial has built integrations with Corelation specifically. We can walk you through exactly how the data flows, what your members will experience, and what your IT team will need to do (spoiler: not much).
Representative institutions publicly known to use Corelation KeyStone. This is not a complete list.
| Credit Union | State | Total Assets |
|---|---|---|
| Mountain America Credit Union | UT | $25.5B |
| Digital Federal Credit Union (DCU) | MA | $13.6B |
| Patelco Credit Union | CA | $9.4B |
| Ent Credit Union | CO | $12.5B |
| OnPoint Community Credit Union | OR | $10.6B |
| Addition Financial Credit Union | FL | $3.3B |
Integration data current as of 2026. Credit union asset data from NCUA Q4 2024. Core platform information from public vendor disclosures.