The short answer
For prime credit borrowers, Caribou typically has the cleanest process and most competitive offers, but with a vehicle age cap that disqualifies older cars.
For fair-credit borrowers, AutoPay has the broadest credit-tier acceptance (down to 575 FICO) and accesses a wider partner-lender network for sub-prime offers.
RateGenius sits in the middle — not always the cheapest, but worth checking as a third data point because their lender network differs from the other two.
Side-by-side
| Caribou | AutoPay | RateGenius | |
|---|---|---|---|
| What they are | Refinance marketplace | Refinance marketplace | Refinance marketplace |
| Min credit score | 630 | 575 | 620 |
| APR (from, current) | ~5.79% | ~5.69% | ~5.75% |
| Loan amount | $5,000 – $150,000 | $2,500 – $100,000 | $10,000 – $100,000 |
| Loan term | 36 – 84 months | 24 – 84 months | 36 – 84 months |
| Vehicle age cap | 10 model years, 150k miles | Varies by partner | 10 model years, 150k miles |
| Soft-pull pre-qualification | Yes | Yes | Yes |
| Origination fees (typical) | $0–$399 (varies by partner) | $0–$500 (varies by partner) | $0–$300 (varies by partner) |
| Cash-out option | Yes | Yes | Yes |
| Lease buyout | Yes | Yes | Yes |
| Funding speed (typical) | 5–14 days | 5–14 days | 7–14 days |
How marketplaces actually work
You complete one application. The marketplace shops it to their partner-lender network (banks and credit unions that have agreed to consider their referrals). Multiple lenders return offers; the marketplace presents them to you. You pick one and move forward.
Important nuance: the actual lender holding your loan is one of the partner banks, not the marketplace itself. Caribou, AutoPay, and RateGenius are originators/middlemen. The lender's terms (hardship policies, customer service quality, refi options later) are what you'll actually live with. Read the offer's lender name carefully.
Where Caribou wins
Cleanest process
Caribou's online application and offer-comparison interface is the most polished of the three. Less friction, clearer offer presentation.
Slightly broader credit acceptance
Caribou accepts down to 630 FICO — between AutoPay (575) and RateGenius (620). For fair-credit borrowers in the 630–660 range, Caribou is often the right starting point.
Mileage cap of 150k
Higher than typical industry cap of 125k. Useful for older or higher-mileage vehicles.
GAP and VSC available (which we'd skip)
Caribou pitches GAP insurance and vehicle service contracts during the application. These products are available but typically priced above what you'd get directly from your insurer or third party. Decline these and the offer is clean.
Where AutoPay wins
Lowest credit floor
AutoPay accepts down to 575 FICO. The other two are 620+. For sub-prime refinancing, AutoPay is one of the few options.
Lower minimum loan amount
$2,500 vs. Caribou's $5,000 and RateGenius's $10,000. Useful for refinancing nearly-paid-off loans where the others won't fund.
Shorter term option
24-month minimum vs. 36-month at the other two. Useful if you want to refinance into a much shorter term.
Largest partner network
AutoPay shops your application to one of the larger partner-lender networks in the marketplace category. More variety often means more competitive offers, especially for edge-case borrowers.
Where RateGenius wins
Different lender network
RateGenius's partner-lender network overlaps with but isn't identical to AutoPay's or Caribou's. Worth checking as a third quote even if you've already pre-qualified at the other two — sometimes a lender appears at RateGenius that doesn't elsewhere.
Established business
RateGenius has been operating longer than Caribou; some borrowers prefer the longer track record. Practical impact on your loan: minimal (the actual lender is what matters).
Generally lower fees
RateGenius's typical origination fee range ($0–$300) is slightly lower than AutoPay's ($0–$500). Not always — depends on which partner lender ends up funding — but a useful tie-breaker.
The trap with all three
Final lender variance
The lender that ends up holding your loan can differ. Their hardship policies, online portal quality, and refinance options later may not be what you'd expect. Always note which specific bank is funding before signing.
Add-on pitches
All three pitch GAP insurance, VSC, and credit insurance during the application flow. These are typically priced 50–100% above market. Decline.
Origination fee variance
The lowest-APR offer might come with the highest origination fee. Always compare APR plus fees, not just rate. A 5.99% offer with $0 fee can beat a 5.79% offer with $400 fee on a smaller loan.
The smart shopping process
If you're seriously refinancing:
- Pre-qualify at all three. Soft pulls only — no credit-score impact. ~30 minutes total.
- Also pre-qualify at PenFed (open membership) — credit unions often beat marketplaces for prime credit.
- Compare apples-to-apples: APR plus fees, term length, partner lender identity.
- Hard-pull at the winner only.
The full process produces a meaningfully better outcome than picking any one marketplace blind. Combined process takes a couple hours but saves typically $500–$2,000 over the loan's life vs. accepting the first offer.
Decision matrix
| Situation | Best starting point |
|---|---|
| Prime credit (700+), no special circumstances | Caribou + PenFed direct |
| Sub-prime credit (575–620) | AutoPay (lowest floor) |
| Fair credit (620–700) | All three; compare |
| Loan balance under $5,000 | AutoPay (lowest minimum) |
| Vehicle older than 10 years | Likely none — try LightStream direct |
| Cash-out refinance | All three; compare APR + fee |
| Want shortest term refi | AutoPay (24-month minimum) |
Frequently asked
Will applying to all three hurt my credit?
Initial pre-qualifications are soft pulls (no impact). Only when you formally accept an offer at one does a hard pull happen. If you do hard pulls at multiple within 14 days, FICO consolidates them to one inquiry.
Can the marketplaces actually beat my direct credit-union offer?
Sometimes — particularly for fair credit. For excellent credit, direct credit unions typically still win. Pre-qualify at both to see your specific numbers.
Why does the same loan cost different amounts at different marketplaces?
Each marketplace has a different partner-lender network with different appetites for your file. The same borrower can get a 6.5% offer at one and 5.9% at another based purely on which banks are in each network.
Which has the best customer service?
Customer service is mostly about the underlying partner lender, not the marketplace. The marketplace handles the application; the lender handles the loan. Read reviews of the specific lender that ends up funding before signing.