Stripe and Adyen are two of the most recognized names in payment processing. Stripe's 2024 total payment volume crossed roughly $1.4 trillion with 38% year-over-year growth. Adyen processed over 1.29 trillion EUR in the same period with EBITDA margins near 50%. Both are massive payment service providers enabling businesses worldwide.

But here is what most comparison guides will not tell you: both platforms are built for low-risk, mainstream businesses. Post 2023-2024 regulatory crackdowns in crypto, BNPL, and online gambling have made mainstream PSPs even more conservative with underwriting. If your company operates in adult entertainment, CBD, gambling, crypto, nutraceuticals, dating, travel, vape, or any other high-risk vertical, neither Stripe nor Adyen will accept you. And if they do onboard you by mistake, you risk sudden account freezes, held funds, and termination with zero warning.

This guide gives you a fair, factual comparison of both platforms, then shows you exactly where to go when neither option fits.

Who Are Stripe, Adyen, and Fasto in 2026?

Stripe

Founded in 2010 in Ireland and the US, Stripe now operates in 45+ countries supporting 135+ currencies. Core products include Stripe Payments, Stripe Billing, Connect, Radar, Issuing, and Terminal. According to company announcements reported by The Information and FT in 2024, Stripe processed about $1.4 trillion in total payment volume with full-year profitability finally achieved. The platform appeals strongly to SaaS companies, online businesses, and digital-first SMBs who value its developer-centric approach.

Adyen

Founded in 2006 in Amsterdam and public on Euronext since 2018, Adyen processed roughly 1.29 trillion EUR in 2024 with around 4,000 employees. Its single payment infrastructure handles online, in-app, and in-store payments with unified data. Enterprise clients like Uber, Spotify, eBay, H&M, and McDonald's rely on Adyen for their complete payments platform needs.

FastoPayments

Fasto takes a different path entirely. As a B2B PSP specializing exclusively in high-risk and regulated verticals, Fasto serves merchants in adult content, CBD and hemp, nutraceuticals, gaming and betting, travel, crypto, and forex. Key offerings include high-risk merchant accounts with multiple acquiring banks, a payment gateway supporting cards, local payment methods, and crypto, plus chargeback protection and fraud tools tuned for above-average dispute ratios. While Stripe and Adyen optimize for "average" risk, Fasto's entire underwriting and risk management model is built for above-average risk by design.

Stripe: Features and Overview

Stripe has become the default choice for developers and digital businesses that do not touch restricted content or products. Think of Stripe as a beautifully designed motorway, as long as you drive the kind of car they like.

Stripe's Key Features

Global payments: 135+ currencies with local acquiring in key markets. Support for Apple Pay, Google Pay, Link, Alipay, and WeChat Pay in some regions.

Revenue tools: Stripe Billing for recurring payments and subscriptions, Tax for automated calculation, and Revenue Recognition for ASC 606 compliance.

Developer and platform tools: Connect for marketplaces with split payouts, Issuing for virtual and physical cards, and Terminal for in-person payments.

Fraud and compliance: Stripe Radar with machine learning risk scores. SCA support in Europe handles 3D Secure and PSD2 requirements.

Stripe Advantages and Disadvantages

Stripe Pricing and Typical Costs

Stripe's flat-rate pricing model is straightforward. For the EU/EEA, standard online card fees are 1.5% + 0.25 EUR per transaction. UK cards run at 2.5% + 0.25 EUR. International cards add another 1.5%, and currency conversion adds 1% on top. No monthly fees exist by default, but optional add-ons like Radar for Fraud Teams add costs. Chargeback fees hit roughly 15 EUR per dispute.

To put that in perspective: if you process 200,000 EUR monthly at 1.5% + 0.25 EUR with 2,000 transactions, you are paying roughly 3,500 EUR in processing fees alone, plus 15 EUR per dispute on top. Stripe's flat-rate model becomes expensive at scale compared with interchange++ models. Custom pricing options exist for larger merchants, but those deals remain private.

Critically, Stripe does not "price for" high-risk merchants. It simply refuses or shuts them down. That is a different kind of cost entirely.

Adyen: Features and Overview

If Stripe is the favourite tool of fast-moving startups, Adyen is the industrial-grade machinery running in the basement of global retailers. Adyen positions itself as an enterprise-first unified commerce payment platform, originally built around European acquiring but now truly global.

Adyen's Key Features

Single platform architecture: Gateway, risk, and acquiring together. Fewer third parties means faster troubleshooting and unified payment flows.

Omnichannel capability: Payment terminals, mobile POS, and online checkouts on the same system. Features like buy-online-return-in-store and consistent customer tokens enable complex payment needs.

Local payment methods: Strong support for European options like iDEAL, Bancontact, Sofort, plus local card networks in LATAM and APAC. Over 250+ payment methods across 200+ markets.

Risk engine: RevenueProtect with configurable rules plus machine learning. Adyen Uplift helps enterprises tune risk strategies market by market. Network Token Optimisation and intelligent retries improve authorization rates.

Adyen Advantages and Disadvantages

Stripe vs Adyen: Key Differences That Actually Matter

On paper the feature lists look similar, but in practice the differences in ideal customer, risk appetite, and pricing structure matter far more. Choosing between Stripe and Adyen is less like picking Coke vs Pepsi and more like choosing between a Swiss Army knife and a full tool chest.

Integration, Developer Experience, and Onboarding

Stripe offers very fast self-service signup for most low-risk businesses. Clean documentation, extensive code samples, and sandbox environments work without heavy sales involvement. REST APIs, SDKs for JavaScript, PHP, Python, Ruby, Java, and mobile make Stripe ideal for tech-savvy companies. Prebuilt UI components like Checkout and Payment Element mean a small DTC brand can go live in a single weekend.

Adyen requires contact with sales, business case review, and test accounts before going live. Onboarding can take days or weeks instead of minutes. The API and SDKs are enterprise-grade and reliable, but the learning curve is steeper. Documentation is thorough but oriented toward merchants with dedicated engineering teams.

Fasto deliberately invests more human time in onboarding high-risk merchants. More KYC, KYB, and compliance work exists, but it is structured to get approvals rather than instant rejections. Fasto offers API docs and plugins for WooCommerce, Magento, or custom PHP/Node but pairs them with dedicated onboarding managers. For a CBD subscription brand or adult cam site, Stripe's instant setup is often followed by instant shutdown, which is where Fasto's hands-on approach becomes practical.

Pricing and Fee Comparison

Adyen Pricing and Typical Costs

Adyen uses interchange++ pricing: a fixed processing fee around 0.11 EUR per transaction plus scheme fee plus interchange cost. This varies by card type, region, and payment method, making fee forecasting more complex than Stripe's flat rate.

Minimum monthly invoice requirements may apply (often around 1,000 EUR or more). Advanced risk or authentication products have separate pricing. Chargeback fees range from 5 EUR to 25 EUR depending on network and region.

A retailer doing 50 million EUR annually in Europe will likely save with Adyen's interchange++ compared with Stripe's flat rate. A 30,000 EUR per month Shopify online store might just get confused by the complexity. Think of onboarding Adyen like applying for a corporate credit card, not signing up for Netflix. It takes a bit.

Three-Way Pricing Comparison

Features and Capabilities

High-Risk Industry Support: Where Both Fail

This is the section that matters most if you are reading this comparison because your business does not fit neatly into mainstream categories.

Mainstream PSPs are optimized around portfolio-wide risk metrics, regulatory pressure from card schemes, and investor expectations. This pushes them to de-risk rather than deeply manage edge cases. After major fines in the 2010s and 2020s, large acquirers tightened acceptance criteria. The Financial Times and Reuters documented 2022-2025 waves of de-risking activity where major banks quietly exited crypto exchanges, adult subscription platforms, and nutraceutical trial offer models.

Concrete pain points for high-risk merchants include: account approval followed by sudden termination after risk review, frozen settlements for weeks while investigations run, refusal to underwrite industries on internal prohibited lists regardless of individual controls, and little flexibility on chargeback thresholds defined by Visa's VFMP or Mastercard's Excessive Chargeback Programme.

In short: Stripe and Adyen try not to get dirty. Fasto shows up in work boots with a mop and a compliance manual.

How Fasto Outperforms Stripe and Adyen for High-Risk Payment Processing

For merchants who already know mainstream PSPs are not a fit, Fasto offers an alternative path built specifically for challenging verticals.

Specialised high-risk merchant accounts come with multiple acquiring partners able to board adult, CBD, gaming, travel, crypto, and forex where Stripe and Adyen routinely decline. Custom risk profiles per merchant replace one-size-fits-all approaches.

Fraud prevention uses device fingerprinting, velocity rules, 3D Secure routing, and behaviour-based scoring tuned for known patterns in adult, gambling, or trial offers. The goal is reducing both true fraud and friendly fraud while keeping conversion healthy.

Chargeback protection includes alerts (similar to Ethoca and Verifi), auto-refund flows to prevent disputes, and fully managed representment. Fasto expects chargebacks in high-risk sectors and designs both pricing and operations around them.

Payment methods support cards, SEPA and local bank transfers, multi-currency settlement options, and crypto payments where legally allowed. A merchant in Cyprus can sell to Canada, the UK, and Brazil using appropriate local methods.

Compliance treats KYC/AML, transaction monitoring, and SCA as competitive advantages. FATF guidance and European Banking Authority papers emphasise proportionate, risk-based approaches rather than blanket de-risking. Fasto's underwriting models examine business behaviour, refund policies, and marketing practices, not just a Merchant Category Code label.

Real-World Scenarios: Who Should Use What?

How to Decide: A Simple Framework

Full Three-Way Comparison

The Verdict: When to Choose Which

Stripe and Adyen are outstanding at what they were built for: large-scale, mostly low and medium-risk payment processing for mainstream commerce. Regulation, scheme rules, and portfolio risk push them away from true high-risk sectors.

Fasto is not trying to be a clone of Stripe or Adyen. Instead, it serves as the specialist partner for merchants at the edge of what banks feel comfortable with. Payments should feel like infrastructure, not like a horror film with surprise plot twists.