FH FluxHarbor Payments Contact desk
2026-05-12 / Editorial brief, no. 184 / By the FluxHarbor Payments desk

A practitioner's brief on subscription payment integration, from a Seoul desk that has run the migrations.

The week's editorial reads, the working notes from our consulting engagements, and the service packages we use to help subscription businesses get the payment plumbing right.

  • Subscription gateways audited, redesigned, or migrated without a re-platform season
  • Dunning logic that respects the subscriber and recovers more revenue per attempt
  • Payment analytics finance and product can both quote from the same dashboard
  • A senior team of seven, based in Seoul, working with subscription businesses across APAC and Europe
  • Editorial briefs, runbooks, and field notes the rest of the practice can borrow from
06:30 KSTMonday clinics opens for client questions
10:00 KSTEditorial newsletter goes out to subscribers
14:00 KSTGateway vendor briefings on rotation
17:30 KSTField notes published from active engagements
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FH

Lead image (placeholder): the editorial board reading proofs in the Centropolis office.

Service package

Gateway Stack Architecture Sprint

A four-week diagnostic and design engagement that maps your gateway dependencies and proposes a subscription-ready stack.

Read the brief →
Field note

Why involuntary churn keeps creeping up at series B

A short note on the dunning systems that quietly stopped scaling, and the decline mix nobody is reading.

Open the note →
Editorial

The auth rate dashboard everybody wants

The five views that survive a year of finance review. More than five and the dashboard stops being looked at.

Open the editorial →

Ecosystem strip

A warm welcome to the platforms we work alongside

Our consultants have spent the last five years inside CRM, analytics, and payments stacks across APAC and Europe. The list below is grouped by where each platform sits in the subscription pipeline so you can spot familiar names quickly.

  1. 01

    CRM 3 familiar names

    The customer relationship layer where most of the renewal conversations actually live. We have integrated each of these with subscription billing platforms in production.

    • Salesforce
    • HubSpot
    • Pipedrive
  2. 02

    Analytics 3 stacks under our hands

    The data warehouses and BI tools where payment performance gets argued about. We model the source data once and let each tool present it.

    • Snowflake
    • Looker
    • Metabase
  3. 03

    Payments 4 acquirers and processors

    The card rails, alternative methods, and subscription billing systems where most of our active engagement time is spent.

    • Stripe
    • Adyen
    • Toss Payments
    • Recurly

Customer wall

Subscription operators we have worked with, grouped by industry

Across the last six years our team has worked with a mix of B2B SaaS, digital membership brands, and content platforms. The grid below summarises the segments quietly. We do not list logos for every engagement; some clients prefer not to be named in public, which we always respect.

24

B2B SaaS

  • NorthBeam
  • CivicLane
  • PaperFolio
  • KettleOps
  • BrightLedger
  • LumenStack

Plus a smaller group of clients held under non-public engagement.

11

Digital membership brands

  • Almanac Club
  • Quiet Field
  • CourierType
  • River & Ridge

Plus a smaller group of clients held under non-public engagement.

9

Streaming and content

  • HanRo Media
  • Slow Tape
  • Backstage Daily
  • Index Sound

Plus a smaller group of clients held under non-public engagement.

Guest writer carousel

This week's contributors. Quick takes, on rotation.

PJ

Park Ji Eun

Recurring revenue benchmarks

Seoul Subscription Forum

MB

Marco Bianchi

Cross-border tax for SaaS

Bianchi & Partners, Milan

LH

Lena Hofstetter

Strong customer authentication

PSD2 Working Group

AT

Aiko Tanaka

Recovery operations

Tokyo FinOps Network

KJ

Kwon Jae Ho

Settlement and reconciliation

Independent treasury advisor

EV

Eleanor Voss

Subscription cohort modelling

Voss Analytics, London

Partner logos

A short list of the organisations our practice partners with

S Stripe Payments
A Adyen Payments
TP Toss Payments Payments
R Recurly Payments
S Salesforce CRM
H HubSpot CRM
P Pipedrive CRM
S Snowflake Analytics
L Looker Analytics
M Metabase Analytics

Partnerships are non-exclusive. We work alongside any vendor that serves a client well, and we will say so when one does not.