AI Credit Underwriting
Approve more borrowers without increasing risk
Lenders using Zest AI outperform their peers
Comparing performance on key metrics from NCUA data, lenders who adopt modern underwriting from Zest AI consistently achieve stronger outcomes
Compared to the industry standard
When analyzing 60+ day delinquencies
Stronger return-on-assets to impact the bottom line
Our approach is unique
First we find the right data for you
We analyze multiple sources to identify which data will make the most impact for your institution.
Then we build a model that’s yours
Zest AI data scientists engineer hundreds of features for product line-specific models that are validated and tailored to your community. Each custom model is stress-tested across borrower segments and edge cases.
Full transparency, no black box
Every model is fully transparent, explainable and fair. We deliver thorough model risk management and fair lending documentation to satisfy regulators and ECOA Reg B requirements.
Get up and running quickly
Deploy AI credit underwriting with no IT lift. Improve approvals, increase automation, and reduce risk via leading LOS integrations.
Continuous partnership with
our AI advisors
Work with our U.S.-based AI advisors to continuously optimize your credit strategy, pricing and portfolio management. With 1,500+ models in production, we help you find the right balance between risk and growth.
Measurable impact on lending performance
Zest AI customers consistently achieve stronger growth, better risk outcomes, and more efficient decisioning.
without added risk
decisions
See the impact on your portfolio
- Grow the book faster: find and identify more approvals.
- Cut delinquency and charge-offs: spot risk before it hits your books.
- Sharper segmentation: see your portfolio the way it actually behaves.
- Review applicants: see what drove each applicant's results.
Applicable across your lending workflows
Acquisition
Support pre-screen, pre-qualification, and pre-approval campaigns.
Application
Move members through the screening process safely without friction.
Underwriting
Automate decisioning with powerful risk scores dedicated to each product line and delivered within your LOS.
Portfolio
Understand ongoing credit risk fluctuations across borrowers on your books to maintain portfolio health and lend deeper.
Real results from real lenders
Your unique objectives are accomplishable with Zest AI
Custom models built for your portfolio, not pre-trained or one-size-fits-all
Explainability built in, with clear, regulator-ready reason codes
Proven performance across the full credit spectrum, including thin files
Fast deployment with no IT lift and seamless LOS integration
“Zest AI’s underwriting technology is a game changer for financial institutions... With an auto-decisioning rate of 70-83%, we’re able to serve more members and have a bigger impact on our community.”
Increasing efficiency with Zest AI
Commonwealth Credit Union scaled automated decisioning without sacrificing approval growth.
FAQs
How is Zest AI's credit scoring different from traditional bureau scores, like FICO or Vantage?
Traditional bureau credit scores use 15–20 data points, which isn't enough to reliably separate good borrowers from risky ones in the 600-750 range, the tier where that distinction matters most.
Zest AI builds custom AI models using 200–300 data features trained on your institution's own historical loan performance. The result: 2–4x more predictive accuracy in the middle credit tiers, a 20–30% lift in approvals for creditworthy borrowers currently being turned away, and up to 80% loan automation—all without increasing risk.
What LOS systems does Zest AI integrate with for AI credit underwriting?
Zest AI is built to work inside your existing LOS, not replace it.
We have native integrations with:
- MeridianLink
- Fiserv Originate
- Temenos
- Origence (CuDL)
- Jack Henry (SIM)
- Keystone
- See a full list of our partners here
The Zest AI custom score surfaces directly inside your existing underwriting workflow, so your team isn't learning a new system. Zest AI also has the ability to deliver your score to you outside of the LOS if you'd prefer.
How much lift is required on our end and how long will this take to implement?
It depends on how quickly your organization is ready to move. Some of our fastest AI credit underwriting implementations have taken weeks rather than months. The majority of the technical integration is handled by the Zest AI team.
How can lenders use Zest AI's underwriting while managing fair lending risk?
Every model used for decisioning comes with documented reason codes that satisfy ECOA/Reg B, and FCRA requirements—ready to map to the same adverse action notice framework your team already uses. Full exam-ready documentation is provided for every decisioning model, including model validation reports, performance monitoring, and fair lending analysis.
How do we know if Zest AI will actually work for our institution before we sign?
Before you commit, we run a Proof of Value analysis on your own historical data—showing you exactly how many additional good loans you would have approved and what that means in dollar terms for your portfolio. Reach out to our team to get this started for you.
See what better AI credit underwriting looks like for your portfolio
See how Zest AI can help you approve more borrowers, automate more decisions, and reduce risk
