What is the difference between Square and Mollie?

Square is best for Small businesses wanting POS and online payments, while Mollie is best for European businesses that want easy payment integration with local payment methods. Square starts at 2.6% + $0.10 and Mollie starts at €0.25 + %.

Is Square or Mollie cheaper?

Square starts at 2.6% + $0.10 with a free tier. Mollie starts at €0.25 + %.

Is there a free alternative to Mollie?

Yes, Square offers a free tier (No monthly fees).

Square vs Mollie

Square is payment processing with point-of-sale hardware, online payments, and business tools, while Mollie is european payment service provider with simple integration and transparent pricing. Square is built for small businesses wanting pos and online payments, whereas Mollie targets european businesses that want easy payment integration with local payment methods.

At a glance

	Square	Mollie
Best for	Small businesses wanting POS and online payments	European businesses that want easy payment integration with local payment methods
Starting price	2.6% + $0.10	€0.25 + %
Free tier	✓	—
Open source	—	—
Free tier available	✓	—
Open source	—	—
E-commerce integration	—	✓
European payments	—	✓
Hardware	✓	—
Invoicing	✓	—
Klarna	—	✓
Online Payments	✓	—
POS	✓	—
Payment processing	—	✓
iDEAL	—	✓

Square

Strengths

Includes POS as a core feature, purpose-built for payment processing workflows
Includes Online Payments as a core feature, purpose-built for payment processing workflows
No monthly fees — generous enough for most small teams to get real work done
Established product with 17+ years on the market and a mature ecosystem

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in payment processing
Limited team/admin features if your organization eventually scales up

Try Square → Full review

Mollie

Strengths

Excellent support for European payment methods (iDEAL, Bancontact, etc.)
Simple, transparent per-transaction pricing
Easy integration with e-commerce platforms
No monthly fees — pay only per transaction

Weaknesses

Primarily European — limited support outside EU
Fewer global payment methods than Stripe
Less developer tooling compared to Stripe
Not ideal for US-only businesses

Try Mollie → Full review

The bottom line

Pricing: Both Square and Mollie are free. You can try both without spending a dollar.

Feature gaps: Square offers Hardware, Invoicing and Online Payments that Mollie lacks. Mollie brings E-commerce integration, European payments and Klarna that Square does not have.

Where each tool shines: Square's biggest strengths are: includes pos as a core feature, purpose-built for payment processing workflows. includes online payments as a core feature, purpose-built for payment processing workflows. Mollie's biggest strengths are: excellent support for european payment methods (ideal, bancontact, etc.). simple, transparent per-transaction pricing.

Watch out for: With Square, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Mollie, the main complaint is that primarily european — limited support outside eu.

Choose Square if...

You need a tool built for small businesses wanting pos and online payments
You specifically need Hardware and Invoicing
You care about includes online payments as a core feature, purpose-built for payment processing workflows
The free tier works for you: no monthly fees

Choose Mollie if...

You need a tool built for european businesses that want easy payment integration with local payment methods
You specifically need E-commerce integration and European payments
You care about simple, transparent per-transaction pricing