Both let you split a purchase into fixed monthly payments, but they're built for different worlds. Sunbit lives at the service counter — dental, auto, vet, eye care. Affirm lives at online and retail checkout. Here's an honest, side-by-side look at how they compare.
Figures are general and current as of 2026; exact terms depend on your approval and merchant. Always review your agreement before signing.
The clearest divide is setting. Sunbit is a point-of-service tool: you use it at a dental office, auto shop, vet clinic, or eye care center. Affirm is a checkout tool for retail and e-commerce — Amazon, Walmart, Peloton, and hundreds of thousands of stores. For an in-person service bill, Sunbit is usually the one that's actually available.
The second difference is the credit check. Sunbit uses a soft pull every time, so checking never affects your score. Affirm starts with a soft check too, but for some longer-term loans it may run a hard inquiry that can ding your score by a few points — and since 2025 it reports loans to Experian and TransUnion, which can help or hurt depending on your payments.
| Sunbit | Affirm | |
|---|---|---|
| Checking options | Soft | Soft |
| Longer loans | Still soft | May be hard pull |
| Reports to bureaus | Varies | Yes (2 bureaus) |
The mechanics matter — here's what to expect from each in practice.
You apply in person at the counter by scanning your driver's license. A soft credit check runs in the background, and within about 30 seconds you see fixed monthly plan options for that service bill. You choose a term, sign, and move forward — designed for in-person bills up to $5,000.
The soft check never changes, even on longer terms, and roughly 90% of applicants are approved — making it a dependable option for care you need now.
Affirm appears at checkout when you shop online or in retail stores. You pick Pay-in-4 (0% APR) for smaller buys or a longer monthly plan (0%–36% APR) for bigger ones, with the total cost shown up front. A soft check starts the process, though longer loans may trigger a hard inquiry.
It's a strong fit for retail purchases and can help build credit through on-time payments, since Affirm reports to Experian and TransUnion.
In most cases the choice makes itself, because they rarely appear in the same place. If you're standing at a dental, auto, vet, or eye care counter, Sunbit is the one built for that moment — a soft check every time, a fast decision, and a high approval rate for bills up to $5,000.
If you're checking out online or in a retail store, Affirm is the natural fit, with wide merchant acceptance, a Pay-in-4 option, and credit reporting that can help build history. They're complementary tools more than direct rivals — the right one is usually whichever matches where you're spending.
It's worth keeping both in mind rather than picking one for everything. Use Sunbit when you're at a service counter and want a soft check with a quick, high-approval decision; reach for Affirm when you're buying from a retailer and want a Pay-in-4 split or to build credit through reported payments. Matching the tool to the setting — and reading the total cost before you commit — will save you more than loyalty to any single provider.
"I need $2,500 of dental work at my dentist's office." Sunbit is the fit. Affirm is a retail and online checkout tool and generally isn't offered at a dental office. Sunbit is designed for the service counter, with a soft check and a ~30-second decision.
"I'm buying a $1,500 mattress online." This is Affirm's home turf. It appears right at checkout on retail and e-commerce sites, with a Pay-in-4 option or a longer monthly plan, and on-time payments can help build credit. Sunbit isn't used for online retail.
"I'm worried about my credit score while I shop around." Sunbit uses a soft pull every time, even on longer terms, so checking never affects your score. Affirm may run a hard inquiry on some longer loans — fine if you're committed, but worth knowing if you're still comparing.
Affirm starts with a soft check, but for some longer-term loans it may run a hard inquiry that can temporarily lower your score by a few points. If protecting your score while you shop around matters to you, Sunbit's always-soft check is the safer way to see what you qualify for.
Affirm's Pay-in-4 is 0%, but its monthly loans range from 0% up to about 36% APR depending on the merchant and your credit. Treat a longer Affirm loan like a real installment loan — read the total cost shown at checkout, since it can sometimes exceed what a low-APR credit card would cost.
This isn't really an either/or for most purchases. Affirm shows up at retail and online checkout; Sunbit shows up at the service counter. If you're paying a dental, auto, vet, or eye care bill in person, Affirm usually isn't even an option — so Sunbit is the practical choice for that moment.
Usually not. Affirm is built for retail and e-commerce checkout, so it's rarely available at a dental office, auto shop, vet clinic, or eye care center. For those in-person service bills, Sunbit is the tool designed for the point of service and is far more likely to be offered at the counter.
It can, in two ways. For some longer-term loans, Affirm may run a hard credit inquiry that temporarily lowers your score by a few points. It also reports loans to Experian and TransUnion, so a missed payment can hurt your score (while on-time payments can help). Sunbit, by contrast, uses a soft check every time, so checking your options never affects your score.
Affirm generally reaches higher, with financing up to around $20,000 depending on the purchase and your profile. Sunbit is designed for bills between $200 and $5,000. For a large retail purchase, Affirm's higher ceiling helps; for a typical service bill, Sunbit's range is usually plenty.
Affirm offers a Pay-in-4 plan (four interest-free payments) for smaller purchases, which is popular at retail checkout. Sunbit focuses on fixed monthly installment plans rather than a four-payment split, since it's geared toward larger service bills paid over several months. If a four-payment plan is what you want for a retail buy, Affirm is the fit.
With Affirm, yes — it reports loans to Experian and TransUnion, so consistent on-time payments can add positive history (and missed payments can hurt). Sunbit's credit reporting varies by plan, so if credit-building is a specific goal, Affirm's reporting is more predictable. For simply paying a service bill over time without a hard pull, Sunbit is the simpler route.
For a service bill at the counter, ask your provider about Sunbit. Checking takes about 30 seconds, uses a soft pull, and never affects your credit score.
No application fees · No late fees · No prepayment penalties