StructureNot home finance and not itself a fund. The app aggregates a user's bank accounts (via open banking) to build budgets, automate savings, and presents a Shariah-compliant investment marketplace where users compare and access third-party halal products. Kestrl's role is software/distribution; the regulated, screened products are supplied by partners.
A Muslim money/budgeting app with a halal investment marketplace — software and distribution rather than a fund or adviser. Compliance for any product you buy rests with the third-party provider, not a Kestrl fatwa board. For each product, check the actual provider, the regulatory protection, and who certifies it.
Read the contract →Established & regulatory standing
The verifiable facts
Established
Founded November 2019 by Areeb Siddiqui and Daeng Termizi (met during a Cambridge MBA). Began as a Muslim money/budgeting app; also licenses fintech/data tools to Islamic banks.
Regulatory standing
Kestrl itself is not a direct investment manager. Its app uses regulated partners (account-information services via TrueLayer; e-money via AF Payments Limited, FCA FRN 900440). Investment products in the marketplace are provided by third parties; FSCS/FCA protection depends on the underlying provider — confirm per product.
Shariah board
Who certifies it
No single named in-house Shariah board verified. As an aggregator/marketplace, Shariah compliance largely rests with the third-party products it lists rather than a Kestrl fatwa board.
A named, credentialled board is a real signal — but a provider’s own board certifying its own product is not the same as arm’s-length review. Weigh it alongside the independent commentary below.
Independent scholarly review
What independent scholars have said
Profiled by Cambridge Judge Business School and by Islamic-finance commentator Mohammed Amin (Oct 2024) — profiles/analysis, not Shariah fatwas.
Independent commentary is weighed, not treated as a final personal ruling. A body that rules one way is one respected voice, not a universal consensus — and rulings can lag changes to a live contract.
How the structure works
The mechanics, in principle
Not home finance and not itself a fund. The app aggregates a user's bank accounts (via open banking) to build budgets, automate savings, and presents a Shariah-compliant investment marketplace where users compare and access third-party halal products. Kestrl's role is software/distribution; the regulated, screened products are supplied by partners.
This describes the structure in principle — it is not a verdict on the executed contract. Note too that FCA/PRA regulation guarantees consumer protection and solvency oversight, not Shariah-compliance; the checklist below is what tests the fiqh.
From the public documents
How the contract actually works
Read from Kestrl’s own public materials — white papers, product pages, FAQs and fatāwā — not its executed contract, which is generally not published. Where a point is undisclosed, it is said plainly rather than guessed. Sources are listed below.
There is no single home-finance or fund contract to evaluate here: what a user actually enters into is (a) an electronic-money account — the Kestrl account and card are issued by AF Payments Limited under a Mastercard licence (FCA FRN 900440), an e-money product that the site itself states is NOT FSCS-protected; (b) an open-banking data consent — account aggregation is provided as an agent of TrueLayer, the regulated Account Information Service (FCA FRN 901096); and (c) the app's own terms for budgeting, the zakat/interest-purification tools and the share-screening checker (a paid premium tier, reported at roughly £1.49/month). For any halal investment or savings product surfaced in the marketplace, the binding contract and the Shariah certification sit with the third-party provider (e.g. the HSBC Islamic Global Equity Index Fund route the app has signposted), not with Kestrl — there is no verified in-house Shariah board, so compliance is delegated and should be confirmed product-by-product. One feature warrants direct scrutiny before relying on it: the app markets an 'interest-free' reward stated as a percentage on stored balances above a threshold (a ~£1,000 minimum is advertised). A fixed advertised percentage return on a held cash balance is structurally the kind of arrangement a careful buyer should ask the provider to justify as a genuinely non-riba reward (a discretionary gift or profit-share) rather than a guaranteed return on deposited money — the 'interest-free' label is a marketing claim, not an independent fatwa. Full executed terms, the marketplace selection criteria, and any referral economics are not published, so the honest reading is software-and-distribution with delegated compliance: useful as a tool, but the protections and the Shariah ruling rest on whichever underlying product you buy.
The Six-Pillar test
The questions that decide it
This is the universal lens this site applies to every home-finance contract, anywhere. Read each pillar as a question to put to Kestrl’s executed contract — not its brochure.
- 1
Real ownership
Does the financier genuinely take ownership of the asset — even briefly — and bear a real owner's risk, rather than only ever holding a debt secured against it?
- 2
Risk-sharing
If the asset is destroyed or its value collapses, does the financier share that loss in proportion to its stake, or is the customer left bearing it alone?
- 3
Rent vs interest
In a lease/co-ownership, is the rent benchmarked to a genuine market rent for the property — or is it calibrated to an interest rate (a base-rate + margin) in disguise?
- 4
Default mechanism
On default, does the contract behave like the end of a real lease/partnership — or does it accelerate like a loan, demanding the full outstanding 'principal' plus charges?
- 5
No guaranteed pre-fixed return
Is the financier's return tied to real ownership and risk, or is it a pre-fixed, guaranteed sum that arrives regardless of what happens to the asset?
- 6
Substance over form
Strip away the Arabic labels: does the cashflow, risk, and outcome differ from a conventional loan — or is it the same economics wearing a compliant name (ḥiyal)?
Before you sign
What to ask Kestrl, in writing
Put these to the provider in writing and keep the answers. The reply — not the marketing — is what tells you whether the structure holds.
For any product I buy in the app, who is the actual provider, and what FCA/FSCS protection applies?
Who Shariah-certifies each listed product — is there independent screening, or just the provider's claim?
On what basis is the advertised balance 'reward' (a stated percentage above a minimum balance) Shariah-compliant — is it a discretionary gift/profit-share or a guaranteed return on deposited money?
What data is shared via open banking (TrueLayer), and how is it protected?
Does Kestrl earn referral/commission on products it lists (conflict disclosure)?
Is there any in-house Shariah board, or is compliance fully delegated to providers?
The honest gap
What we have not verified
- What independent Shariah governance, if any, Kestrl applies to its marketplace selection.
- How the company is funded and how stable it is.
- How curated vs open the product marketplace is.
Sources
What this read is built on
The verifiable references behind this page — provider documents and independent scholarly resolutions. Read them yourself; do not take our summary on trust.