Flat-fee card processing for UK businesses.
Every payment tracked through seven explicit states.
No hidden charges. Just clarity.
A flat percentage. Nothing else. No per-transaction fixed fee, no cross-border uplift, no monthly minimum, no surprise add-ons. The number on the tin is the number you pay.
Invite-only. Locked for 12 months from go-live. Ten spots.
Standard rate after founding period. Same terms, same transparency.
Stripe UK charges 1.5% + 20p per transaction. But the actual cost after surcharges, international card fees, and add-ons typically lands between 2.3% and 2.8% for UK SaaS businesses. That gap is real money. Send us a screenshot of your Stripe fees for any month and we will calculate your effective rate.
Fast, clean, familiar. Card details, Apple Pay, Google Pay. No account creation, no redirects, no friction. Your brand name. Their trust.
Revenue, payouts, every transaction with its full timeline. Answer any question about your money within ten seconds of opening.
Seven explicit states. One valid action at a time. You cannot skip steps. Every transition enforced, logged, and permanent.
Most payment systems treat money as "in" or "out." That is where mistakes hide. Fluxa forces every stage to be acknowledged, making reconciliation trivial and disputes easy to resolve.
1,325 automated tests across 16 test suites verify every state transition, every guard, every edge case, and concurrent race conditions. The state machine is proven in code, not promised in a pitch deck.
Infrastructure for companies where payment reliability is non-negotiable.
Seven money states, each enforced and logged. You cannot skip steps. You cannot move backwards. The state machine is the source of truth for every payment.
Every financial movement recorded as a double-entry posting. Independent of the state machine. A second layer of verification.
Token-based auth, role-based access. Every action tied to an operator identity in the audit trail.
Failure spikes, volume drops, distribution shifts, stuck checkouts, latency creep, velocity anomalies. Issues surfaced before operators notice them. 223 tests across the detection layer alone.
Bank-grade idempotency on all write operations. Multiple operators can approve simultaneously. Only one payout executes. Row-level locking in Postgres.
External service fails, Fluxa stops retrying and fails safely. Preview any dangerous action before committing. No cascading failures.
We are onboarding founding merchants now. Drop your email and we will reply personally. No pitch deck, no demo booking form. Just a conversation about your payments.
Two founders. No investors. Every line of code written by us.