Marketplace building blocks

Onboard sellers without dropping them

Run KYC and KYB inside your own signup, so sellers verify without leaving your product. Stay compliant, cut the fraud that lands on your platform, and keep the conversion that bolted-on verification kills.

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Free to start. No contract. We'll show you what your finance stack is costing you.
The problem

KYC that bounces sellers out of your flow costs you sign-ups

Stripe Connect's onboarding drops sellers in the middle of signup — opaque rejections, a redirect to someone else's UI, business-detail steps that individuals can't answer. Meanwhile the fraud that slips through lands on your platform as failed cards and chargebacks. Verification you don't control is verification that costs you.

Seller onboarding
Northwind Labs LtdKYB
Approved
J. WhitfieldKYC
Approved
Atlas StudiosKYB
Under review
What Fynex runs

How seller onboarding runs on Fynex

Verify inside your product, approve in the background, keep control.

01

KYC and KYB inside your own flow

Sellers verify in your product, not bounced to a third-party page. You collect what you need; approvals happen in the background without breaking the signup.

02

Cut fraud before it reaches payouts

Real identity and business checks at onboarding stop the failed-card bombardment and fake sellers that otherwise land on your platform as chargebacks.

03

Stay compliant as you scale markets

KYB and KYC are the switch that turns each seller on — handled on our licence, so compliance keeps pace as you add sellers and countries.

How we compare

The same job, with the leaks closed

Point tools solve part of it. Fynex runs the whole thing on one platform.

The problem
Other platforms
!Verify without losing the seller
Redirect to a third-party UI with silent declines.
Embedded KYC/KYB inside your own signup.
!Onboard individuals, not just companies
Business-detail steps individuals can't complete.
Flows that fit sole traders and companies alike.
!Keep fraud off your books
Weak checks; failed cards and chargebacks land on you.
Real KYC/KYB stops bad actors at the door.
!Scale to new markets
Re-solve compliance per country yourself.
Verification handled on our FCA-authorised licence.
FAQ

Questions, answered

KYC (Know Your Customer) verifies an individual's identity; KYB (Know Your Business) confirms a company is legitimate and identifies who controls it. A marketplace onboarding sellers usually needs both — KYC on the person, KYB on the business. Fynex runs both, embedded inside your own signup flow.
KYC and KYB run inside your product instead of bouncing sellers to a third-party page. You collect what you need in your own flow, approvals happen in the background, and sellers verify without the drop-off that a redirect and opaque rejections cause on Stripe Connect Express.
Yes. Real identity and business checks at onboarding are what stop fake sellers and the failed-card bombardment that otherwise reaches your platform as chargebacks and negative balances. Because Fynex is the one holding funds and running KYB, that risk is handled at the door rather than after the money moves.
Yes. The flow fits sole traders and individual sellers as well as registered companies, so you're not forcing business-detail steps on a person who doesn't have them — a common failure point with off-the-shelf Connect onboarding.

Find what you're leaking, for free

Send us your setup. We run a free diagnostic and show you what your payment stack costs you today.

One recent diagnostic found €2M in hidden fees across 10 processors for a proptech client.
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Compliance, handled

The trust layer most software can't offer

We can be your Merchant of Record and hold the funds. Most tools can't, because they don't hold the licence.

FCA-authorised EMI

An e-money institution via Fondy. We can hold and move your funds.

Licence
E-money institution
FCA
Client funds
Safeguarded

PCI DSS Level 1

The highest card-data security standard, on by default.

Card data
PCI DSS
Level 1
Encryption
On by default

Audit logs

Every movement traceable and ready for review.

Activity
Payout · £23,84714:02:11
Logged
Split · ORD-2024-00114:02:09
Logged

Built-in KYC / KYB

The switch that turns the business on.

Verification
KYB · Northwind Labs Ltd
Approved
KYC · J. Whitfield
Approved
We do Fridays so you don't have to.Payouts at midnight. You, asleep.Invoices that chase themselves. Ruthlessly.We carry the chargebacks. You carry on.We do Fridays so you don't have to.Payouts at midnight. You, asleep.Invoices that chase themselves. Ruthlessly.We carry the chargebacks. You carry on.We do Fridays so you don't have to.Payouts at midnight. You, asleep.Invoices that chase themselves. Ruthlessly.We carry the chargebacks. You carry on.

Verify every seller. Without losing a single one

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Spreadsheets, retired with honours.Month-end close, minus the month-end.FX fees, caught red-handed.Fewer tools. Fewer tabs. Fewer tears.Your CFO's favourite coworker never takes lunch.Spreadsheets, retired with honours.Month-end close, minus the month-end.FX fees, caught red-handed.Fewer tools. Fewer tabs. Fewer tears.Your CFO's favourite coworker never takes lunch.Spreadsheets, retired with honours.Month-end close, minus the month-end.FX fees, caught red-handed.Fewer tools. Fewer tabs. Fewer tears.Your CFO's favourite coworker never takes lunch.

The AI finance layer for platforms and operators. It runs the money chain and keeps more of it in your business. One platform instead of a dozen.

Company
© 2026 Fynex
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