Apps Like Affirm: Buy Now, Pay Later Alternatives Compared

The main apps like Affirm in the US are Klarna, Afterpay, Sezzle, Zip, PayPal's Pay in 4 and PayPal Credit, and Splitit. They all let shoppers spread a purchase over time, but they differ in whether they charge interest, how long you get to repay, whether they run a credit check and where you can use them. The best choice depends on the size of the purchase and how predictable your income is.

This guide explains how Affirm works, compares the main alternatives, and then looks at the other side of the counter: what a business should consider when it adds buy now, pay later (BNPL) to its checkout or builds its own financing app.

How Affirm works

Affirm offers point of sale financing at checkout with participating US merchants, inside its own app and through its card. Shoppers can choose short interest free plans paid every two weeks, or longer monthly plans that may carry interest depending on the purchase and the shopper's credit profile. Affirm shows the total cost before you commit and has built its brand around not charging late fees.

That combination makes Affirm popular for larger purchases such as furniture, electronics and travel. It also explains why people look elsewhere: some want only interest free plans, some cannot get approved for the amount they need, and some shop at stores that offer a different provider.

Apps like Affirm compared

Terms change often and depend on the merchant and the shopper, so treat this table as a guide to how each service is structured rather than a list of current rates.

Klarna

Klarna is one of the largest BNPL providers and offers several ways to pay: four interest free installments, paying the full amount later, and longer monthly financing that may carry interest. Its app doubles as a shopping hub where you can browse stores and track payments. If you want a range of plan types in one place, Klarna is the closest like for like alternative to Affirm.

Afterpay

Afterpay, now part of Block alongside Cash App, focuses on splitting purchases into four payments over six weeks without interest. It relies on late fees rather than interest, so it suits shoppers who are confident they can make each payment on time. It is widely accepted in fashion, beauty and lifestyle retail.

Sezzle

Sezzle also offers four interest free payments over six weeks and allows a limited number of payment reschedules. It has added subscription tiers with extra features. It works best for smaller purchases where a short repayment window is manageable.

Zip

Zip, formerly Quadpay in the US, splits purchases into four payments and lets shoppers use a virtual card at stores that do not integrate Zip directly. That flexibility is its main draw. Check the installment fees that may apply before you rely on it.

PayPal Pay in 4 and PayPal Credit

PayPal offers two different products. Pay in 4 is a short interest free installment plan available at checkout for eligible purchases. PayPal Credit is a reusable line of credit that behaves more like a credit card, sometimes with promotional periods on larger purchases. If you already pay with PayPal, these are the easiest to adopt, but read the promotional terms carefully.

Splitit

Splitit takes a different approach. Instead of a new loan, it splits the purchase into installments against the credit line on a card you already hold, so there is no separate credit application. The catch is that your card usually carries an authorization hold for the full amount, which reduces available credit until the installments are paid.

How to choose a BNPL app as a shopper

• Match the plan to the purchase. Short Pay in 4 plans suit smaller items. Larger purchases may need monthly plans, which can cost interest.
• Look at the total cost, not the installment. Add up interest and possible fees before you agree.
• Check credit reporting. Some providers report payments to credit bureaus. That can help a credit file if you pay on time and hurt it if you do not.
• Avoid stacking plans. Several small plans across different apps are easy to lose track of. Keep a single list of due dates.
• Read the late payment policy. It is the part of the terms most likely to cost you money.

Options for businesses offering BNPL

For a merchant, BNPL is mainly a conversion and average order value tool. Shoppers who would hesitate at a large total often complete the purchase when they see a smaller installment. There are two broad ways to offer it.

Integrate an existing provider

Most stores add one or two providers through their ecommerce platform or payment gateway. The provider pays the merchant up front, takes the credit risk and charges the merchant a fee per transaction. This is the fastest route and works for nearly every retailer. Our payment integration team handles this kind of setup, and the EGO Sustainable case study shows a bilingual Shopify store running Tabby and Tamara, two BNPL providers popular in the Gulf.

Build a custom financing app

A smaller group of businesses build their own installment or financing product. This makes sense for lenders, fintech startups, marketplaces with high value items, or retailers with a large repeat customer base who want to own the relationship. A custom build gives you:

• Your own user experience. The application, approval and repayment flow can match your brand and your customers.
• Data ownership. Repayment behavior and purchase patterns feed your own risk models and marketing.
• Loyalty features. Rewards for on time repayment or repeat purchases can be built in.
• Integration with your systems. Orders, CRM and accounting can share the same records.
• Less dependence on third parties. You control fees, policies and availability.

The trade off is responsibility. You carry the credit risk, the compliance work and the security burden that a provider would otherwise handle.

What it takes to build an app like Affirm

Compliance and licensing

Consumer lending in the US is regulated at both federal and state level, and the rules for BNPL have been under active review. Work with legal counsel early to decide whether you lend directly, partner with a bank, or offer a merchant funded plan, because that decision shapes the whole product.

Underwriting and risk

You need a way to decide who gets credit and how much. That usually combines identity verification, a soft or hard credit check, bank data and your own repayment history, with rules that tighten or loosen as the data grows.

Payments and security

Card data must be handled to the PCI Security Standards, usually by using a compliant payment processor so card numbers never touch your servers. Add encryption, strong authentication and audit logs from day one.

The core features

• Account creation with identity checks.
• Instant credit decisions at checkout.
• A clear schedule showing every payment and the total cost.
• Automatic payments with reminders before each due date.
• A merchant dashboard for orders, refunds and settlements.
• An admin panel for credit rules, collections and support.

A phased plan

Most teams start with a narrow product, such as interest free installments for one merchant category, prove that repayments behave as expected, and then widen limits and add longer plans. A mobile app often follows a web checkout once there is a base of repeat users.

If you are weighing whether to integrate a provider or build your own financing product, our mobile app development team has worked on payments products such as the Purpose Payment app, and you can read more about our work in fintech.