The Banking CoreReimagined
The operating system for banks and credit unions who want to control their own destiny. A full replacement for Fiserv, FIS, or Jack Henry — or run it side-core, alongside what you have today.
Take back your stack
One platform. Not nine vendors.
Nucleus BankOS was built to replace the third-party platforms, data lakes, CRMs, and fraud tools you license today — so you spend less, move faster, and offer more without the vendor sprawl.
Core Banking
Replace legacy mainframes with a platform that lets you do everything you want, when you want — no change-request queue.
Security Suite
Eliminate fraud with tools that create synergy across the risk teams that sit siloed in your org today.
AI Workforce
A role-based, context-aware AI workforce that lets you offer competitive new services without scaling headcount to match.
Analytics + CRM
Retire the CRM and the expensive data lake you maintain just to understand your own core data, with a customer-aware platform.
What's in the base
A full bank, on day one.
Not a starter pack you upgrade your way out of. The modules you license from six separate vendors today are included from the start.
Conductor
Real-time operations
Wires, deposits, accounting, branch, RM, and customer service — every queue and exception, live.
Foundry — Retail
Lending, built in
Consumer and small-business origination with AI-assisted underwriting that books a GL entry instantly.
DarkMatter
Risk on day one
The engine behind Cyber, BSA, Fraud, and Compliance — included in the base, sharing one identity and audit log. No separate vendors.
Exec Center
Command centers
Eight role-specific executive dashboards on the same data plane as operations — no reconciliation lag.
No-Code Deployment
Ship in minutes
Build onboarding and servicing surfaces with a visual designer and deploy to your own domain.
Customer-Centric Core
One source of truth
Data keyed by customer, not account. One identity record across every product line in the bank.
We're different in every way that matters.
See the full side-by-side against the legacy cores.
Low-Stress Deployment
Two ways to run Nucleus BankOS
Same platform. Same modules. Same product. Pick the deployment that fits where you are today — switch later when you're ready.
Default
Full Core
Replace your existing core entirely.
- One platform across operations, lending, risk, treasury, and exec
- One ledger, one customer master, one vendor relationship
- Conversion workbench migrates from Fiserv, FIS, or Jack Henry
- Parallel-run period proves GL parity before cutover
Best fit: Institutions ready to commit to a modernization, with an executive sponsor. Standard environments convert in as few as 90 days.
Optional
Side Core
Run Nucleus alongside your existing core.
- Keep your current core in place — nothing has to move on day one
- Adopt Nucleus modules selectively: onboarding, fraud, treasury
- Customer master stays in sync across both systems
- Switch to full-core whenever you're ready
Best fit: Institutions early in modernization, locked into legacy contracts, or who want to validate before converting.
No upcharge for side-core mode. The product is the same — the deployment choice is yours.
Secure. Compliant. Auditable.
Security was never an afterthought.
Tokenization, access isolation, and our BroadStreet network design — defense-grade methods, applied to your core from the first line of code. Regulatory requirements are the foundation this platform was built on, not a layer bolted on after the fact.
Industry first
A console built for your regulator.
No other core ships a dedicated regulator and auditor console. Examiners get read-only, scoped, fully-logged access to exactly what they need — turning exam prep from a manual extract-and-package scramble into a standing capability.
Security architecture
Compliance & regulatory ready
Customer Master
One identity record per customer across every product the bank runs.
Double-entry GL
GAAP-compliant ledger underneath every transaction, reconciled in real time.
RBAC + Row-Level Security
Granular permissions and segregation of duties, configured once.
Immutable Audit
Every action, decision, and data access logged for exam and forensics.
See for yourself
Real product. Real data. Real time.
More product walkthroughs coming soon.
How it ships
Live in as few as 90 days.
- 1
Discovery + conversion mapping
Weeks 1–4Joint workshop with our engineering leads. You leave with a written fit assessment, technical scope, and a candidate go-live date.
- 2
Implementation
Through go-liveConversion runs through our workbench — you approve every mapping rule. A parallel-run period proves GL parity before cutover. As few as 90 days for standard environments.
- 3
Partnership cadence
OngoingBiweekly product sessions through year one, monthly after. Direct escalation paths and quarterly business reviews with your dedicated success team.
Common questions
Ready to build what's next?
See Nucleus BankOS in a guided walkthrough, join the founding-partner cohort, or talk to our team about your institution.