Square vs Stripe for Solo Developers

Quick Comparison

Square Overview

Square started as an in-person card-reader company and grew into a full commerce platform. The POS hardware, the seller dashboard, the inventory management, and the online store are all under one account. For any business with a physical component, Square is the most coherent single-vendor stack you can pick.

Square's developer APIs have improved a lot. You can build custom checkout flows, integrate with their catalog, handle subscriptions, and even build apps on top of their POS. The docs are decent and the SDKs cover the major languages. It's no longer the obvious second choice for pure online payments, though Stripe still has a wider feature set there.

For solo developers, Square's appeal is the bundle. If you're building a product that involves any in-person commerce, gift cards, or local services, Square gives you the hardware, the dashboard, and the APIs in one account at one bill. The hardware works out of the box and the staff app on iPad is genuinely good.

Stripe Overview

Stripe is the developer-first online payments platform that became the default for indie SaaS, marketplaces, and any software-driven commerce over the last decade. The API is excellent. The docs are excellent. The dashboard is excellent. Almost every payment problem a solo dev is going to encounter has a Stripe-shaped solution already documented.

Beyond basic charges, Stripe offers subscriptions via Billing, customer portals, tax handling via Stripe Tax, invoicing, Connect for marketplaces, Issuing for virtual cards, Identity for KYC, Atlas for incorporation, and Capital for cash advances. The breadth is enormous and almost all of it works well together.

Stripe's pricing is straightforward at 2.9% + 30 cents per online transaction in the US, with regional variations. There are no monthly fees and no minimums. You only pay when you actually charge a card, which is exactly the right model for a solo dev who might not earn anything for the first few months.

Key Differences

Stripe is online-native. Square is in-person-native. Both have crossed over into the other's territory, but their DNA shows. Stripe's online flows, subscription handling, and developer experience are still better than Square's. Square's in-person hardware, POS, and inventory management are still better than Stripe's. Pick based on where most of your transactions will happen.

Stripe's developer experience is in a different league. The Stripe API is one of the best-designed APIs in the industry. The webhooks work, the test mode is reliable, the SDKs are first-class. Square's APIs are competent but less polished. For a solo dev who needs to integrate payments into a custom application, Stripe will save you days of friction.

Square charges less for in-person transactions. Square's in-person rate is 2.6% + 10 cents versus Stripe's 2.7% + 5 cents. Close enough that it rarely matters, but if you process significant in-person volume the difference adds up. Square also has better hardware. If you need a card reader on a counter, Square's options are more refined.

Subscription billing is more mature on Stripe. Stripe Billing handles recurring revenue, proration, dunning, upgrades and downgrades, tax, invoicing, and customer self-service portals. Square has subscription support but it's less feature-complete and less developer-friendly. For SaaS specifically, Stripe is the right answer almost always.

International support is different. Stripe operates in many more countries than Square and is the easier choice for international businesses. Square has expanded internationally but coverage is narrower. If you're a solo dev outside the US, UK, Canada, or Australia, Stripe is probably the only one of the two that even serves your country.

When to Choose Square

• Your business involves in-person sales, services, or hardware
• You want POS, inventory, and payments under one account
• You're running a local services business as your side project
• Hardware like card readers or terminals are part of your setup
• Predictable bundled pricing matters more than API depth

When to Choose Stripe

• You're building a pure online product, SaaS, or marketplace
• You want the best-in-class developer experience and API
• Subscriptions, billing, and customer portals are part of your stack
• You're outside the US and need broader international support
• You want access to a deep ecosystem of payment-adjacent products

The Verdict

For the typical solo developer audience reading this, Stripe is the answer almost every time. If you're building SaaS, marketplaces, digital products, or anything that lives entirely online, Stripe's developer experience and feature depth are why it became the default. Subscriptions alone are reason enough.

Square is the right answer in one specific situation, which is when your business has any real in-person component. If you're a developer who also runs a coffee cart, a side hustle reselling vintage gear at markets, or a service business that needs to take cards at the customer's location, Square's hardware and POS experience are worth choosing it for. The Square developer APIs are good enough that you can still build custom integrations on top.

The honest take is that this is not a head-to-head decision. Stripe and Square serve different problems even though both technically process card payments. Pick based on where the swipe happens, not based on the brand. For online-only, Stripe. For anything in person, Square. If you somehow need both, use both, since their account systems are separate enough that running them in parallel is fine.