Why PSPs Are Moving Away from Stripe & Adyen to Own Infrastructure in 2026?
For the past decade, building a payment business meant one thing: integrate Stripe or Adyen and go to market. They were the golden rails—reliable, global, and developer-friendly. Together, they have dominated the conversation, commanded premium valuations, and captured the imagination of fintech founders globally.
But 2026 marks a decisive turning point. As global digital payment volumes continue their exponential climb, PSP leaders are confronting an uncomfortable truth: SaaS, once celebrated for its speed and simplicity, has become an expensive ceiling on long-term innovation, margin, and competitive control.
This is why the fastest-growing PSPs, neobanks, and payment platforms are now moving away from subscription-based financial infrastructure and toward custom-built or white-label systems with complete source-code ownership.
The Scale of Stripe & Adyen’s Dominance
To understand why PSPs are leaving, we must first understand how Stripe and Adyen achieved dominance and why they’ve become difficult to escape.
The Numbers Tell the Story
Stripe and Adyen together form an effective duopoly in the high-growth, digital-native merchant segment. Their 2025 financial results tell a story of continued expansion, but also reveal the pressures that come with scale .
| Metric | Stripe (2025 Est.) | Adyen (2025) |
|---|---|---|
| Total Processing Volume | $1.4 Trillion | €1.29 Trillion (~$1.4T) |
| Annual Revenue | $14–16 Billion (gross) | €2.36 Billion |
| Market Valuation | $91.5 Billion (private) | €50+ Billion (public) |
| Core Segment | SaaS, marketplaces, startups | Enterprise merchants |
| Take-Rate (Blended) | ~1.1% | Interchange++ (~1.2% avg) |
| YoY Volume Growth | 38% | 21% (constant currency) |
Stripe’s footprint extends far beyond raw numbers. The company processes the equivalent of 1.3% of the world’s gross domestic product and serves more than 100 companies that each process over $1 billion annually on its platform . Its Dublin-based international unit alone reported revenues of $5.12 billion in 2024, a 34% surge driven by expanded partnerships with global enterprises including Nvidia, Hertz, and Best Buy .
Adyen’s reach is equally impressive, processing €649 billion in the first half of 2025 alone . The company has cemented its position with enterprise giants like Meta, Uber, and Starbucks, and reported full-year 2025 revenue of €2.36 billion, up 21% on a constant currency basis . Its EBITDA margin expanded to 53%, demonstrating the operating leverage inherent in its unified commerce model .
Together, they influence well over $2.5 trillion in annual payment volume and control an estimated 25–30% of PSP upstream flow. This concentration means that for every $100 a consumer spends online, approximately $1.50 flows through Stripe or Adyen before reaching the merchant .
How They Make Money
Both companies monetize through a combination of core processing fees and value-added services. Understanding this machinery is essential to grasping why the economics become punitive at scale.
| Revenue Stream | Stripe | Adyen | PSP Impact |
|---|---|---|---|
| Core MDR | 2.9% + $0.30 (standard); 1.1% blended | Interchange++ (~1.2% avg) | 25–40% of PSP margins leak here |
| FX Markups | 1–2% on cross-border | Built into volume pricing | Expensive for multi-corridor PSPs |
| Platform Fees | Connect (0.5%), Treasury, Atlas | Unified commerce markup | Locks PSPs into ecosystem |
| Value-Add Services | Radar (fraud), Sigma (analytics) | Risk management, issuing | Additional margin leakage |
A typical PSP on Stripe or Adyen pays 0.5–0.7% per transaction in effective fees after accounting for volume-based discounts. That means every $1B in processed volume comes with $2M–$6M of annual leakage—before accounting for FX markups, routing inefficiencies, compliance delays, vendor lock-in, or the lost opportunity to own strategic data.
At Stripe’s standard rate of 2.9% + $0.30, the company earns over $2.9 billion on every $100 billion in transactions processed . For a PSP doing $1 billion annually, even a fraction of that rate represents real money that could fund product development, marketing, or margin expansion.
Read More About White Label Payment Gateway Development
Why Mid-Market PSPs Are Hitting the SaaS Ceiling?
In the early years of a fintech’s lifecycle, SaaS makes perfect sense. It reduces engineering lift, accelerates MVP launches, and abstracts away early compliance overhead. The global payment processor market is projected to grow from $71.15 billion in 2026 to $122.08 billion by 2031 at an 11.4% CAGR, driven by embedded finance and real-time payment adoption . But as transaction volumes scale into the hundreds of millions or billions, SaaS begins to silently erode profitability.
The Five Breaking Points
1. The Fee Death Spiral
This is the primary and most tangible driver. The math becomes inescapable at scale.At $500M annual volume, a PSP paying 1.8% effective rate loses $9M per year to Stripe or Adyen. At $1B, that’s $18M. At $2B, it’s $36M.
| Annual Volume | SaaS Fees (1.8%) | Own Infrastructure Cost | Annual Savings |
|---|---|---|---|
| $500M | $9M | $1.5–2M (amortized) | $7–7.5M |
| $1B | $18M | $2.5–3M (amortized) | $15–15.5M |
| $2B | $36M | $4–5M (amortized) | $31–32M |
| $5B | $90M | $8–10M (amortized) | $80–82M |
The math becomes compelling: for platforms with $300M+ volume, custom infrastructure pays for itself in less than 2 years—and the savings compound as volume grows. This isn’t theoretical; it’s basic P&L management.
2. The Approval Rate Ceiling
When you use Stripe or Adyen, you’re limited to their routing logic and acquirer relationships. Sophisticated PSPs know that different acquirers perform better for different card types, regions, and merchant categories. A transaction from a German-issued Visa may route better through one acquirer, while a UK Mastercard may perform better through another.
The Cost of Suboptimal Routing:
- 2–5% lower approval rates = $20–50M in lost revenue on $1B volume
- Direct acquiring and smart routing can recover this instantly
- Each 1% improvement in approval rates adds $10M in incremental revenue at $1B volume
The global payments market is seeing cyber-fraud sophistication outpace traditional defenses, with global fraud losses touching $442 billion in 2023 . False positives from generic fraud models compound the problem, blocking legitimate transactions and eroding merchant revenue. Custom ML models trained on your own data can reduce false declines while catching more fraud.
3. The Compliance Trap
In 2026, regulation is accelerating, not slowing down. The days of annual compliance reviews are over; regulators demand continuous, real-time adherence.
| Regulation | Region | Impact | SaaS Update Lag |
|---|---|---|---|
| PSD3 | Europe | Verification of Payee (VoP), strong customer authentication | 6–12 months |
| PCI DSS v4.0 | Global | Continuous compliance, not annual audits | 3–6 months |
| DORA | EU | ICT risk management, incident reporting | 6–9 months |
| Local Schemes | India, Brazil, Nigeria | Data residency, real-time rail mandates | 6–18 months |
With SaaS providers, compliance updates take 3–6 months to appear in the product—and that’s after the provider decides to prioritize them. With custom or white-label infrastructure, your team implements updates in weeks—and owns the complete audit trail.
The ISO 20022 migration now enables rich-data corporate payments, but leveraging this requires control over message formats and reconciliation logic . SaaS providers offer standardized implementations; custom infrastructure allows you to extract maximum value from the data payloads.
4. The Data Prison
When your transactions flow through Stripe or Adyen, your customer data flows through them too. You receive reports and dashboards, but you don’t truly own the raw transaction intelligence.
The Analytics Advantage of Ownership:
- Build ML models for fraud detection (saving 1–2% in chargebacks)
- Underwrite lending products based on cash flow data
- Create merchant insights that become proprietary assets
- Analyze approval patterns by corridor, card type, and time of day
- Detect emerging trends before competitors
Stripe has deployed more than 500 AI models and invested over $3 billion in data-centric defenses . Your PSP could benefit from similar intelligence—but only if you own the underlying data.
The granular behavioral data captured inside wallet environments creates monetization paths in lending and loyalty that are unavailable to PSPs dependent on third-party processors . Without raw data access, you’re permanently locked out of these high-margin opportunities.
5. The Strategic Lock
This is perhaps the most insidious constraint. Once you build on Stripe or Adyen, you’re subject to their roadmap priorities, pricing changes, and feature limitations.
| Area | Limitation Under Third-Party |
|---|---|
| Routing | Cannot build corridor-specific logic |
| Acquirer Relationships | Cannot negotiate directly |
| Product Innovation | Bound by platform roadmap |
| Feature Rollout | 6+ months for new rails |
| Merchant Experience | Generic, undifferentiated |
| Pricing Flexibility | Fixed margin structures |
Updating or launching new rails (FedNow, PIX, SEPA Instant, UPI) happens in 1–2 months with white-label code, versus 6+ months on SaaS. FedNow has already enrolled 400 U.S. financial institutions, with a target of 8,000, creating an alternate domestic payment path that SaaS providers have been slow to optimize . That’s a material edge in market launches.
Read More About White Label Payment Aggregator Development
The Real Economics – SaaS vs. Owned Infrastructure
Platform-by-Platform Impact
Below is the real numeric, platform-by-platform impact for PSPs considering the move to owned infrastructure. This table is extremely important for CFOs and CTOs making build-vs-buy decisions.
| Platform | SaaS Cost at $1B Volume | Owned Cost at $1B Volume | Key Advantage |
|---|---|---|---|
| Payment Gateway | $5–7M (0.5–0.7%) | $2–3M (0.2–0.3%) | 25–40% cost savings; +5 pts approval rate |
| Payment Aggregator | $6–8M | $2.5–3.5M | 30% faster merchant onboarding |
| Digital Wallet | $4–6M | $1.5–2.5M | Deploy in <90 days; +15pt NPS boost |
| Remittance Engine | $3–5M | $1–2M | 2–3 days faster settlement |
| Money Exchange | $2–4M | $0.5–1.5M | $200K–$1M wider annual FX spread |
| Payout & Reconciliation | $1–2M | $0.3–0.8M | 60% fewer manual tasks |
Where SaaS Leaks Your Margin (and How Custom Fixes It)
| Pain Point | Annual SaaS Loss at $1B | Custom / PrimeFin Labs Advantage |
|---|---|---|
| Transaction Fees | $2M–$6M | 20–35% cost reduction |
| Compliance Delays | 3–6 months | Updates in weeks |
| Data Access | No behavioral or fraud graph data | Full analytic access, custom AI |
| Feature Delays | 6–12 months | 1–2 months, your roadmap |
| Vendor Lock-in | High migration cost | Full code ownership |
| Integration Speed | Slow, queued | Add rails, acquirers, APIs anytime |
Read More About Money Echange Platform Development
The Solution – Building Owned PSP Infrastructure
If the case for moving away is clear, the next question is: how do you actually do it?
The answer is not a dramatic “rip and replace.” Mature PSPs evolve into hybrid infrastructure models:
- Keep Stripe/Adyen as fallback or specific corridor processors
- Build an internal switching and ledger layer
- Integrate direct acquirers one by one
- Route volume strategically based on performance
- Reduce dependency over 12–24 months
Core Components of a Modern PSP Stack
| Component | Function | Build Time |
|---|---|---|
| Transaction Switch | Multi-acquirer routing engine with ML optimization | 3–4 weeks |
| Acquirer Integration Layer | Direct connections to banks/processors | 6–8 weeks |
| General Ledger Engine | Double-entry, immutable accounting | 4–6 weeks |
| Reconciliation Engine | MT940/CAMT parsing, auto-matching with ML | 4–6 weeks |
| Settlement Engine | Multi-currency payouts | 4 weeks |
| FX Module | Pricing, hedging, and conversion | 3–4 weeks |
| Risk & Fraud Layer | ML-based detection, rules engine | 6–8 weeks |
| Merchant Onboarding/KYB | OCR, risk tiering, compliance checks | 2-3 weeks |
The Technical Architecture
Modern PSP infrastructure is built on microservices architecture, enabling horizontal scalability and independent deployment:
- API-first design: All functionality exposed through well-documented RESTful APIs
- Event-driven infrastructure: Message queues (Kafka, RabbitMQ) for reliable processing
- Dual-entry ledger: Immutable accounting with complete audit trails
- Cloud-native deployment: Containerization (Docker, Kubernetes) for global scale
- Multi-region redundancy: Geographic distribution for disaster recovery
The Step-by-Step Migration Timeline (6-Month Playbook)
| Phase | Duration | Key Deliverables | Cumulative Cost |
|---|---|---|---|
| 1. Audit & Plan | Month 1 | TPV/fee baseline, rail map, compliance gap | $50k |
| 2. MVP Core | Months 2–3 | Cards + 2 rails, KYB, ledger, recon | $300k |
| 3. Full Rails & Custom | Months 4–5 | RTP/orchestration, fraud AI, merchant portal | $400k |
| 4. Go-Live & Optimize | Month 6 | Cutover, monitoring, AI tuning | $200k |
| Total | 6 Months | Production-ready infrastructure | $950k |
The White-Label Alternative
For many PSPs, building entirely from scratch isn’t necessary. A growing trend is the adoption of white-label payment gateway solutions that provide a proven technical foundation you can brand as your own.
The white-label approach reduces:
- Development time to 3–6 months
- Cost to a fraction of building from scratch
- Risk with pre-certified compliance
Real-World PSP Migrations
The trend is already underway. Here are real examples:
PrimeFin Labs Client:
- Before: 100% on Adyen, rigid routing, 1.9% blended MDR
- After: Custom infrastructure with 3 direct acquirers
- Results: 30% MDR reduction, +25% approval rates, $2.5M year 1 savings
Rapyd / Airwallex:
Both companies started with significant Stripe/Adyen dependency. Today, they operate hybrid models—owning core switching and ledger while using SaaS providers for specific corridors. Combined TPV now exceeds $10B+ annually.
Stripe Alumni Venture:
Former Stripe leaders recently raised $30M for an orchestration layer startup. The premise? PSPs need to sit above Stripe, not inside it. This is an implicit admission that the aggregator model has reached its limits.
European PSP Case:
A mid-market European PSP processing €800M annually migrated from Adyen to a hybrid model with direct acquiring in three core markets. Within 18 months, they reduced effective processing costs by 28% and launched two new payment methods ahead of competitors still waiting on Adyen’s roadmap.
Why PrimeFin Labs ?
PrimeFin Labs is not a SaaS provider. PrimeFin Labs builds modular, white-label, source code-owned financial infrastructure for PSPs that want to scale globally without being held back by vendor limits.
What We Deliver
| Capability | PrimeFin Labs Advantage |
|---|---|
| Payment Gateway | Multi-acquirer routing, token vault, AI risk |
| Payment Aggregator | Flexible fee models, KYB control, sub-merchant onboarding |
| Digital Wallet | Multi-currency, programmable limits, custom KYC |
| Remittance Engine | Corridor-specific routing & FX control |
| Money Exchange | Own FX engine + branch-level vault controls |
| POS Payment | Any device, bespoke EMV logic |
| Payout & Reconciliation | Real-time multi-party recon, 50% fewer errors |
| Settlement Mechanism | Tailored ledgers + real-time settlement dashboards |
Key Differentiators
- White-label, source-code delivery – You get the full codebase; there is no black box. Your engineers can extend it, self-host, or integrate deeply with internal systems.
- Multi-rail readiness – Designed to plug into card acquirers, A2A rails like UPI, PIX, SEPA Instant, and local wallets as your roadmap evolves.
- Security and compliance baked-in – Vaulting, encryption, logging and auditability are part of the architecture, not bolt-ons.
- Deployment timelines in months, not years – Most clients get to a launch-ready, production-grade gateway in 3–6 months, then iterate corridor by corridor.
Our Process
- Discovery: We understand your business model, target markets, and technical requirements
- Architecture: We design a system tailored to your specific needs and growth plans
- Development: Our engineers build your infrastructure in iterative sprints
- Compliance: We ensure your system meets all regulatory requirements
- Launch: We support your go-live and continue optimizing post-launch
At PrimeFin Labs, we help PSPs and fintech companies build the custom, scalable infrastructure they need to compete in 2026 and beyond.
Citation
- The Irish Times — Stripe sees revenues at Irish unit surge 34% to $5.12bn
https://www.irishtimes.com/business/2025/09/18/stripe-sees-revenues-at-irish-unit-surge-34-to-512bn/ - Research and Markets — Payment Processors Market Analysis and Growth Forecast 2026-2031
https://finance.yahoo.com/news/payment-processors-market-analysis-growth-105900845.html - Research and Markets — Payments Market Report 2026-2031
https://www.globenewswire.com/news-release/2026/01/22/3223654/28124/en/Global-Payments-Market-Report-2026-2031-Digital-Wallets-Dominate-as-Asian-Markets-Lead-Mobile-Payment-Adoption.html
