You process ₹50 lakhs a month across Malaysia, Indonesia, and Singapore. You pick a payment processor based on brand or because your accountant mentioned it once. Six months later, you notice your settlement times are 4–7 days longer than they should be, your foreign exchange margins are eating 2–3% of revenue, and one failed API call locked your entire checkout for 90 minutes during peak hours. Stripe, Razorpay, and Wise all claim regional coverage and competitive rates. They're not equivalent. Each has a specific failure mode that hurts—differently—at your scale. Processing fees: the buried spread that stings more than the headline rate All three publish base rates. None of them publish what they actually take on cross-border transactions. Stripe charges 2.9% + 30¢ per transaction in most SEA markets. On a $100 USD sale from Singapore to Australia, you see: Base fee: 2.9% = $2.90 Fixed fee: $0.30 FX spread: an additional 1.5–2% (never disclosed in the dashboard) Total out: ~4.7–5.4%, not 3.2% Razorpay charges 1.5% + ₹0 flat on domestic INR transactions, and 2.9% + ₹0 on international. The trap: settlement happens in INR, but the FX conversion happens on Razorpay's timeline, not yours. A dollar payment received Monday might not settle until Wednesday—by which time the rate has moved. On a ₹10M monthly volume, this drift costs ₹40,000–₹80,000 per month. Wise publishes actual mid-market rates and a flat percentage spread (0.65–1.5% depending on volume and corridor). No hidden FX. But Wise doesn't offer payment collection in most SEA markets—it's a payout rail, not a checkout processor. If you're using Wise to settle Stripe or Razorpay into your local bank account, you're paying three entities: your processor, Wise, and your bank. Real math at ₹50L MRR (₹6Cr annual, ~$72K USD monthly): Stripe costs roughly ₹8–10L per year in invisible FX spreads alone. Razorpay costs ₹6–8L, but you wait 4–7 days for settlement. Wise costs nothing if you never touch it. But if you're funneling Stripe payouts through Wise to optimize rates, you're paying Wise 0.65% on top of Stripe's 2.9%—net savings vanish. Settlement speed: when 4 days becomes a working-capital crisis Stripe settles to your bank account every 2 days. That's the promise. The reality: the clock starts after a transaction clears (24–48 hours), not when you receive it. A payment on Monday morning might hit your account Thursday. During high-volume periods (sales launches, seasonal spikes), Stripe queues additional reviews and delays settlement by 1–3 days as a fraud check. Razorpay settles next business day in theory, but only if your transaction clears before 2 PM IST the same day. Payments after 2 PM wait until the next day's batch. On a Friday payment, expect Monday settlement—three calendar days. For seasonal businesses (e-commerce, events, education), this is brutal. A Black Friday payment received Friday night won't settle until Tuesday. Wise is irrelevant here because Wise doesn't process customer payments—it only moves money from your processor to your bank. The delay is Wise's. For mid-market volumes, Wise settles most transfers within 1 business day. But if Wise flags a transaction as high-risk (which happens randomly on corridor changes), it holds the money for review. For a ₹10M monthly business with uneven cash inflow, 4-day delays mean you might miss payroll, supplier payments, or tax remittance windows. The cost isn't just float—it's penalties and late-payment fees. Chargeback handling: who protects you, who bleeds you Stripe has a transparent chargeback dashboard and lets you dispute claims. The bad news: Stripe's dispute resolution is slow. A chargeback filed in week one of a billing cycle might not resolve until week three of the next cycle. During that window, the money is in dispute and unavailable. Stripe also charges a $15 USD fee per dispute, win or lose. On high-chargeback verticals (education, SaaS, services), that compounds. Razorpay offers chargeback protection if you pay for it. The base tier includes 90 days of dispute support; protection plans cost 0.3–0.5% of volume. For ₹50L monthly, that's ₹1,500–₹2,500 per month extra. Razorpay also doesn't reverse the fee during disputes—you lose the transaction fee and the protection fee, and Razorpay keeps both unless the dispute is won. At scale, this creates perverse incentives (Razorpay profits from unresolved disputes). Wise doesn't process chargebacks because Wise doesn't process customer payments. But if you're using Wise as a payout bridge, Wise can reverse transfers for fraud up to 35 days after the fact—which means your bank account can go negative unexpectedly months after you thought a transaction was settled. API limits and failure modes: where each processor breaks under load This is where things get real. We tested each processor's behavior at 10,000+ transactions per day (which isn't rare for ₹10M+ MRR aggregators, marketplaces, and SaaS platforms). Stripe rate-limits at 100 req