1. Quick Verdict
Caribou
Active Auto Refinance Marketplace
Active auto refinance marketplace with starting APRs from 4.49%. Soft-pull rate check. Best for borrowers who want to compare refinance offers from multiple lenders.
Visit Caribou Official Site →Upstart
Auto Refinance No Longer Available
Upstart's official auto refinance page says the product is no longer available through Upstart. Borrowers looking for auto refinance should check other providers.
Visit Upstart Official Site →| Category | Caribou | Upstart |
|---|---|---|
| Auto refinance availability | Active auto refinance marketplace | Official page says auto refinance is no longer available |
| Rate check | Soft pull to check offers; hard pull if you continue with a loan | Not available for auto refinance through the current page |
| APR/rate note | Caribou's official rate page shows best available rates starting at 4.49% APR for some top credit tiers and disclosures list APRs from 4.49% to 28.55%, subject to change. | No current auto refinance APR to compare |
| Best for | Borrowers who want to compare refinance offers from a marketplace | Borrowers looking for other Upstart products, such as personal loans |
| Main caveat | Savings are not guaranteed; longer terms can lower payment but raise total interest | Auto refinance page should not be treated as an active offer |
System Quick-Check
The critical distinction here is not which platform has better rates, but which platform actually offers the product. Upstart does not currently offer auto refinance. Caribou does.
2. Feature Comparison
The main difference between Caribou and Upstart for auto refinancing is product availability. Caribou actively matches borrowers with lending partners for auto refinance. Upstart was known for AI-assisted lending but its auto refinance page currently states the product is discontinued.
Why This Comparison Matters
Auto refinance decisions depend on lender availability, your credit profile, vehicle age, mileage, and current loan balance. Comparing two providers where only one currently offers the product clarifies the decision quickly: if you want auto refinance today, Caribou is the relevant choice.
3. Caribou Overview
Caribou is an auto refinance marketplace. It works with lending partners and lets borrowers check refinance options based on their credit profile, current loan, vehicle, and location.
Caribou's current rate page says customers who refinanced through Caribou between January 1 and March 31, 2026 and chose an offer to reduce monthly payment saved an average of $162 per month. Treat that as a funded-borrower average, not a promise. Savings may come from a lower rate, a longer term, or both.
Caribou's rate page also says typical refinance candidates often have a vehicle under 10 to 12 years old, fewer than 120,000 to 150,000 miles, a loan balance between $7,500 and $85,000, and a credit score of 580+ or mid-600s+ depending on the rate context. Those are guideposts, not guarantees.
4. Upstart Overview
Upstart is known for AI-assisted lending, especially personal loans. But its current auto refinance page states that auto refinance is no longer available through Upstart. That should control the comparison. Do not treat Upstart as a current auto refinance lender unless the official product page changes.
Who Should Use Caribou?
- You have an existing auto loan and want to see if a lower APR or lower payment is available.
- Your car, truck, or SUV meets lender age and mileage rules.
- You want to compare offers without a hard credit pull at the rate-check stage.
- You are comfortable reviewing multiple lender offers.
- You understand that a lower monthly payment can still cost more if the new term is much longer.
Who Should Skip Caribou?
- You need a purchase loan or lease buyout.
- You have a motorcycle or commercial vehicle.
- You owe more than lenders will refinance.
- Your vehicle is very old or high mileage.
- You only want a refinance if it reduces total interest, not just monthly payment.