Stripe vs Square: PCI Impact

When choosing a payment processor, understanding the PCI compliance implications isn’t just about meeting requirements—it’s about managing risk, controlling costs, and ensuring your business operates securely. Two of the most popular payment processing solutions, Stripe and Square, take different approaches that directly impact your PCI DSS compliance obligations.

The short answer: Stripe typically requires SAQ A-EP for most implementations, while Square often qualifies for SAQ A (the simplest form) when using their hosted checkout. However, your specific implementation and business model will ultimately determine your compliance requirements.

Let’s dive deeper into how these platforms affect your PCI compliance journey and which might be the better fit for your business.

Overview of Each Option

Stripe: Developer-Centric Payment Processing

Stripe is a technology-first payment processor designed for businesses that want maximum flexibility and customization. Founded in 2010, Stripe provides APIs that developers can integrate directly into websites and applications, offering extensive control over the payment experience.

Key PCI characteristics:

Primarily requires SAQ A-EP compliance
Offers Stripe Elements for secure card data handling
Provides tokenization and hosted payment forms
Supports complex, custom integrations

Square: All-in-One Business Solution

Square started as a point-of-sale solution for small businesses and has expanded into a comprehensive business platform. Their approach emphasizes simplicity and ease of use, with payment processing integrated into broader business management tools.

Key PCI characteristics:

Often qualifies for SAQ A (simplest compliance level)
Provides hosted checkout solutions
Offers integrated POS systems with built-in compliance
Focuses on out-of-the-box security

Key Differences at a Glance

Detailed Comparison

Requirements Comparison

Stripe’s PCI Requirements:
Most Stripe implementations fall under SAQ A-EP, which involves approximately 178 requirements across multiple security domains. This SAQ type applies when you:

Use Stripe.js or Stripe Elements on your website
Handle cardholder data in a browser environment
Redirect customers to complete payments

The A-EP questionnaire requires you to maintain security controls around:

Network security and firewall configurations
Secure coding practices for web applications
Regular vulnerability scanning
Access control measures
Logging and monitoring procedures

Square’s PCI Requirements:
Square implementations often qualify for SAQ A, the simplest PCI questionnaire with only 22 requirements. This applies when you:

Use Square’s hosted checkout exclusively
Never store, process, or transmit cardholder data
Redirect all payment processing to Square’s secure environment

SAQ A focuses primarily on:

Secure hosting provider requirements
Basic access controls
Antivirus software maintenance
Regular security updates

Scope Comparison

Stripe Scope Considerations:
With Stripe, your compliance scope typically includes:

Your web servers hosting the payment pages
Any systems that could impact the cardholder data environment
Networks connected to payment processing systems
Staff with access to payment systems or cardholder data

This broader scope means more systems to secure, more documentation to maintain, and more rigorous security controls to implement.

Square Scope Limitations:
Square’s hosted solutions can significantly reduce your compliance scope to:

The specific webpage that redirects to Square
Basic network security measures
Employee access controls for Square dashboard

The reduced scope translates to fewer systems to audit, less documentation, and simplified security management.

Effort and Cost Comparison

Stripe Implementation Costs:

Initial Setup: Higher due to development complexity
Ongoing Compliance: Moderate to high, requiring quarterly network scans, annual assessments
Technical Resources: Requires experienced developers and security professionals
Documentation: Extensive policies and procedures documentation needed

Square Implementation Costs:

Initial Setup: Lower, often plug-and-play solutions
Ongoing Compliance: Minimal ongoing requirements beyond basic security hygiene
Technical Resources: Can be managed by non-technical staff
Documentation: Basic policy documentation sufficient

Use Case Fit

Stripe Excels When:

You need custom payment flows or complex billing logic
Integration with existing systems is critical
You’re building a marketplace or multi-party payment system
Developer resources are readily available
User experience customization is paramount

Square Works Best For:

Straightforward e-commerce or retail operations
Businesses prioritizing quick deployment
Organizations with limited technical resources
Companies wanting integrated business management tools
Situations where minimal compliance overhead is crucial

When to Choose Each Option

Scenarios Favoring Stripe

High-Growth SaaS Companies
If you’re building subscription billing with complex pricing tiers, usage-based billing, or need to handle international payments with multiple currencies, Stripe’s flexibility justifies the additional PCI complexity.

Custom E-commerce Platforms
When you need payment processing deeply integrated into custom workflows—like dynamic pricing, complex checkout processes, or specialized payment methods—Stripe’s extensive API capabilities make the SAQ A-EP requirements worthwhile.

Marketplace Businesses
For platforms connecting multiple buyers and sellers, Stripe Connect’s multi-party payment capabilities are often essential, despite the increased compliance scope.

Scenarios Favoring Square

Small to Medium Retail Businesses
If you’re running a restaurant, retail store, or service business that needs both online and in-person payment processing, Square’s integrated approach minimizes compliance complexity while providing comprehensive business tools.

Quick Launch Requirements
When time-to-market is critical and you need payment processing operational quickly without extensive development resources, Square’s hosted solutions and SAQ A eligibility provide the fastest compliant deployment.

Resource-Constrained Organizations
For businesses without dedicated IT staff or security professionals, Square’s simplified compliance requirements and built-in security controls reduce operational overhead significantly.

Hybrid Approaches

Some businesses successfully combine both platforms:

Use Square for standard transactions and in-person payments
Implement Stripe for complex billing scenarios or API-driven integrations
Maintain separate compliance documentation for each implementation

This approach requires careful scope management but can provide the benefits of both platforms where each excels.

Decision Framework

Critical Questions to Ask

1. What’s your technical capacity? Do you have experienced developers who can implement and maintain custom integrations?

2. How complex are your payment requirements? Do you need subscription billing, marketplace functionality, or multi-party payments?

3. What’s your risk tolerance for compliance? Can you manage SAQ A-EP requirements and ongoing vulnerability scanning?

4. How important is customization? Do you need complete control over the payment experience, or are standard flows sufficient?

5. What’s your timeline? Do you need payments operational quickly, or can you invest time in custom development?

Evaluation Criteria

Weight these factors based on your business priorities:

Compliance Complexity (High Priority): Square wins for simplicity
Customization Needs (Variable Priority): Stripe provides more options
Implementation Speed (High Priority for Startups): Square typically faster
Long-term Scalability (High Priority for Growth Companies): Stripe more flexible
Total Cost of Ownership (Always High Priority): Depends on your specific requirements

Decision Tree

1. Start Here: Do you need complex payment logic, subscriptions, or marketplace functionality?
– Yes → Consider Stripe (accept SAQ A-EP complexity for functionality)
– No → Continue to question 2

2. Do you have experienced developers and security resources?
– No → Square likely better fit
– Yes → Continue to question 3

3. Is minimizing compliance overhead a top priority?
– Yes → Square
– No → Either platform viable; consider other factors

Common Misconceptions

Myth: “Stripe Isn’t PCI Compliant”

Reality: Stripe is fully PCI DSS Level 1 compliant. The confusion arises because your implementation of Stripe affects your own compliance requirements. Stripe handles their portion of compliance; you’re responsible for yours.

Myth: “Square Means No PCI Requirements”

Reality: While Square can significantly reduce your compliance scope, you still have PCI requirements. SAQ A still includes 22 requirements you must meet and validate annually.

Myth: “SAQ A-EP Is Too Complex for Small Businesses”

Reality: Many small businesses successfully manage SAQ A-EP compliance. The key is understanding the requirements and implementing appropriate controls, often with help from compliance professionals.

Myth: “You Can Switch Without Impact”

Reality: Changing payment processors affects your compliance scope, requires new assessments, and may change your SAQ type. Plan transitions carefully and update your compliance documentation.

FAQ

Q: Can I qualify for SAQ A with Stripe?
A: In rare cases, yes—if you only use Stripe’s hosted checkout and never handle cardholder data in your environment. However, most Stripe implementations require SAQ A-EP due to the use of Stripe.js or Elements in the browser.

Q: Does Square’s transaction processing cost include PCI compliance?
A: Square provides the secure infrastructure, but you’re still responsible for your own compliance validation. You’ll need to complete the appropriate SAQ annually and may need compliance tools or professional assistance.

Q: What happens to my PCI compliance if I use both Stripe and Square?
A: You’ll need to assess each implementation separately. If both qualify for their respective SAQ types independently, you can maintain separate compliance documentation. However, any shared systems or processes must meet the most stringent requirements.

Q: How often do I need to reassess my PCI compliance?
A: Regardless of processor, PCI compliance requires annual validation. SAQ A is typically self-assessed annually, while SAQ A-EP requires annual self-assessment plus quarterly network vulnerability scans.

Q: Can my compliance requirements change after implementation?
A: Yes. Changes to your payment processing setup, data handling procedures, or business model can affect your SAQ type and compliance requirements. Regular compliance reviews help identify when reassessment is needed.

Conclusion

The choice between Stripe and Square significantly impacts your PCI compliance journey. Square’s hosted solutions typically offer simpler compliance (SAQ A) with reduced scope and lower ongoing requirements, making it ideal for businesses prioritizing simplicity and quick deployment. Stripe’s flexible platform usually requires more complex compliance (SAQ A-EP) but provides the customization and advanced features that growing businesses often need.

Consider your technical resources, compliance capacity, and long-term business needs when making this decision. Remember that the “right” choice isn’t always the simplest—it’s the one that best balances your business requirements with your ability to maintain ongoing compliance.

Ready to determine your exact PCI compliance requirements? Try our free PCI SAQ Wizard tool at PCICompliance.com to identify which SAQ type you need based on your specific payment processing setup. Our expert-designed assessment takes the guesswork out of compliance planning and helps you start your PCI journey with confidence. Join the thousands of businesses that trust PCICompliance.com for affordable tools, expert guidance, and ongoing support in achieving and maintaining PCI DSS compliance.