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fintechEast Africa (regional bank, headquartered in Nairobi)

Northern Star Bank

How a tier-2 East African bank shipped a white-label merchant-services product in 4 months — a third of the originally-planned timeline — and onboarded 600+ merchants in the first quarter post-launch.

“Our original plan had us live in twelve months. Letts shaved that to four. The board doesn’t care that we used a platform partner. They care that we ship the product. We shipped.”
— Northern Star Bank, Wanjiru Mathenge, Head of Merchant Services
4 months
From contract to live merchants — vs the original 12-month plan
600+
Merchants onboarded in the first quarter post-launch
92%
First-month merchant retention
Products usedLetts Platform (white-label), Letts Payments, LettsOS, LettsPOS hardware

The before

Northern Star Bank is a tier-2 East African commercial bank with a strong SME deposit franchise. By late 2025, leadership had identified merchant services — POS hardware, payment acceptance, and a thin layer of business management tools — as the natural extension of the SME deposit relationship. Customers were asking for it; competitors were starting to offer it.

The build-vs-buy assessment landed on a 12-month roadmap to ship in-house:

  • 6 months to integrate domestic and international card schemes
  • 3 months to integrate the regional mobile-money rails (M-Pesa, Airtel Money)
  • 2 months to spec, source, and certify POS hardware
  • 1 month to build merchant onboarding KYC workflows
  • Plus an indefinite trail of compliance, certifications, and scheme audits

The decision

The procurement team evaluated four merchant-services platforms. Three were US/EU-domiciled and required substantial Africa-localisation work. The fourth was Letts Commerce.

The Letts pitch was different on three points:

  • Pre-integrated African rails — M-Pesa, Airtel Money, MTN MoMo, Mpamba already certified
  • White-label, not co-branded — the merchant sees Northern Star branding, not Letts
  • A bank-specific deployment model — separate tenancy, ring-fenced data, signed regulatory agreements with the relevant central banks

Northern Star signed in December 2025. The plan: launch with 100 pilot merchants in Q1 2026, scale to 500+ in Q2, full retail rollout in H2.

The 4-month launch

  1. Month 1 — Tenancy + branding. Northern Star tenancy provisioned on Letts Platform. Merchant-app, terminal-screen, and back-office UI re-skinned with Northern Star colours, logo, and tone. Bank’s compliance team integrated KYC workflows.
  2. Month 2 — Pilot cohort. 100 merchants — handpicked across retail, restaurant, and services verticals — onboarded with white-glove support. Hardware deployed; payment rails activated; the bank’s relationship managers trained on the merchant journey.
  3. Month 3 — Production hardening. Pilot feedback fed back into UX; a handful of bank-specific feature requests (loyalty point integration with the bank’s consumer app, settlement timing tweaks) shipped.
  4. Month 4 — Public launch. Marketing campaign live; bank’s 200-strong relationship manager team activated for outbound; self-service signup live in the bank’s SME web portal. 500+ merchants onboarded in 30 days.

What changed

“Our original plan had us live in twelve months. Letts shaved that to four. The board doesn’t care that we used a platform partner. They care that we ship the product. We shipped.”
Wanjiru Mathenge, Head of Merchant Services — Northern Star Bank

Three months post-launch:

4 months
From contract to first live merchant — vs the original 12-month in-house plan
600+
Merchants onboarded in the first quarter post-launch (target was 500)
92%
First-month merchant retention — measured at 30 days post-onboarding

What the bank’s leadership team mentions first:

  • Time-to-market beat the competition. Two of the three fintech challengers pivoted; the bank that had been ahead delayed their launch by another quarter. Northern Star captured the early-market segment.
  • Cross-sell into deposits. ~40% of new merchants opened or upgraded their business deposit account with Northern Star within 30 days of onboarding. The deposit franchise grew faster than at any time in the previous five years.
  • Scheme + central-bank confidence. The pre-certified Letts integrations with the regional rails meant the bank’s relationship with the relevant central bank stayed clean. No surprise audits, no compliance escalations.
  • The relationship managers loved it. RM scoreboards now include merchant-services as a KPI. The bank’s 200-strong RM team has a new reason to call existing SME deposit customers.

What's next

Northern Star is now exploring expanding the platform to two adjacent African markets via partner banks. The white-label deployment model means each new bank is a 4–6 month project, not a 12-month one. The strategic logic: own the merchant relationship in every market the bank operates in, before the regional fintech consolidators get there first.

Wanjiru’s parting note for tier-2 African banks considering merchant services:

“The board will ask ‘why didn’t we build it ourselves?’ once. Then they’ll see the time-to-market and the merchant numbers and they’ll stop asking. Building from scratch is intellectually attractive and commercially expensive. Partnering with a platform that’s pre-certified for African rails is the right answer.”

Products used

  • Letts Platform (white-label deployment) — separate tenancy, full white-label branding
  • Letts Payments — domestic + international card schemes, mobile money, QR
  • LettsOS — light-weight merchant business management module
  • LettsPOS hardware — co-branded terminals shipped from regional hub

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