Flat-fee card processing for UK businesses that tracks every payment through seven explicit states, so you always know exactly where your money is and what you're being charged.
A flat percentage and nothing else, no per-transaction fixed fee, no cross-border uplift, no monthly minimum and no surprise add-ons. The number on the tin is the number you pay.
Invite-only and locked for 12 months from the day you go live, with just ten spots available.
Standard rate once the founding period ends, same terms and same transparency.
Put your numbers in and see the gap between Stripe's headline rate and what you're actually paying them each month.
Based on Stripe UK published rates (1.5% + 20p domestic, +1.5% cross-border, +0.8% corporate card uplift, 2p Radar fee per transaction). Actual rates may vary. Want the exact number? Send your Stripe fees page to us.
Your customers get a clean checkout with card details, Apple Pay and Google Pay all in one place, no account creation, no redirects, just your brand name and a payment form.
Revenue, payouts and every transaction with its full timeline, so you can answer any question about your money within ten seconds of opening it.
Seven explicit states with only one valid action at a time, you can't skip steps, and every transition is enforced, logged and permanent.
Most payment systems treat money as either "in" or "out," and that's where the mistakes hide. Fluxa forces every stage to be acknowledged, so reconciliation is simple and disputes are easy to resolve.
1,325 automated tests across 16 test suites verify every state transition, every guard, every edge case and every concurrent race condition. The state machine is proven in code, not promised in a pitch deck.
Built for companies that can't afford unreliable payments.
Seven money states, each enforced and logged as they happen, you can't skip steps, you can't move backwards, and the state machine is the single source of truth for every payment.
Every financial movement is recorded as a double-entry posting, running independently of the state machine to give you a second layer of verification.
Token-based auth with role-based access, so every action is tied to a specific operator identity and shows up in the audit trail.
Catches failure spikes, volume drops, distribution shifts, stuck checkouts, latency creep and velocity anomalies before you even notice them, with 223 tests across the detection layer alone.
Bank-grade idempotency on all write operations means multiple operators can approve simultaneously but only one payout ever executes, enforced by row-level locking in Postgres.
If an external service fails, Fluxa stops retrying and fails safely instead of cascading the problem. You can also preview any dangerous action before committing to it.
We're onboarding founding merchants now, so drop your email and we'll reply personally. No pitch deck, no demo booking form, just a conversation about your payments.
Two founders, no investors, and every line of code written by us.