Most firms we meet believe their investment platform is their competitive advantage. It's the thing investors see. It's where the brand lives. It feels like product. So the idea of outsourcing it feels like giving away the thing that matters most.
We've spent twelve years watching this assumption play out across more than 70% of the UK's alternative investment market. Here's what we've learned: the firms that treat their platform as their product almost always end up spending their best people, their scarce capital, and their leadership attention on the wrong problem. And the firms that outsource their platform — the ones who got comfortable with that word early — are usually the ones growing fastest.
The differentiator that isn't
Every regulated investment platform has to do the same things. Client money segregation. KYC and anti-money laundering. Appropriateness assessments. Cooling-off periods. Financial promotions compliance. Regulatory reporting. Complaints handling. Fair value assessments. Outcomes monitoring.
These aren't features. They're the floor. And the floor is the same for everyone.
There are areas where platforms do genuinely differ. Investor portfolios vary — a property debt platform presents different information than a community energy platform or an EIS fund. How you display holdings, track performance, and structure portfolio views matters, and it's shaped by the products you offer. Investor reporting is largely a platform design choice too. Outside of standardised HMRC annual returns, the way you communicate with investors — what you report, how often, in what format — is yours to decide.
But here's the thing: these areas of variation aren't reasons to build your own platform. They're reasons to use infrastructure that's already handled this range. A provider that runs platforms across property lending, renewable energy, and ISA wrappers has already built the portfolio and reporting flexibility you need — because they've had to. You get the variation without carrying the build cost.
The actual differentiator is what sits on top of the platform: the deals you source, the sector expertise you bring, the investor relationships you build, and the returns you deliver. That's what investors choose you for. Nobody ever picked a fund manager because of a login screen.
Why outsourcing feels wrong (and why it isn't)
The resistance to outsourcing your platform is rational. You want control. You want it to work exactly the way you need it to. You've seen the technology — it doesn't look complicated. Maybe you've priced up a development team or mapped out an architecture. The numbers seem manageable. And "outsourcing" sounds like handing over something important to someone who cares less than you do.
But outsourcing your platform isn't like outsourcing your customer service to a call centre. It's more like using Visa instead of building your own payment network. You're choosing to run on infrastructure that already exists, is already regulated, and is already maintained — so you can focus on the thing you're actually good at.
What's harder to model is what happens when you don't make that choice.
Regulatory change is constant. Consumer Duty, the POP regime, operational resilience requirements, financial promotions tightening — each one means development work, testing, and evidence production. These arrive on their own schedule, not yours.
Security and infrastructure maintenance never stops. Penetration testing, dependency updates, browser compatibility, performance monitoring, disaster recovery — none of this is optional, and none of it ships features your investors will ever notice.
Talent is fragile. The developers who understand both the technology and the regulation are rare. When they leave — and people always leave — your platform stalls while you recruit in one of the most competitive hiring markets in the country.
None of these costs appear in the initial build estimate. All of them appear in years two through five.
The capital allocation question
This is the strategic decision most firms don't frame clearly enough.
Every pound you put into platform development is a pound you didn't put into origination, investor acquisition, or product development. Every hour your leadership team spends managing a technology build is an hour they didn't spend on the thing that actually grows the business.
For some firms, the maths works. If platform technology genuinely is your core IP — if you're a technology company that happens to operate in financial services — then building makes sense.
But most alternative investment and lending firms aren't technology companies. They're deal-sourcing companies, asset management companies, or lending companies that need technology to operate. For these firms, outsourcing the platform isn't a compromise — it's a capital allocation decision. Build it yourself and you're investing in plumbing. Outsource it and you're freeing up that capital for growth.
The firms we see growing fastest are the ones that made this distinction early. They invested in what makes them money — deals, relationships, expertise — and used existing infrastructure for everything else.
The compounding gap
Here's the part that gets more interesting over time.
When you build your own platform, you carry every cost alone. Every security improvement, every regulatory adaptation, every performance optimisation, every new feature — it's all on your team, your budget, your timeline.
When you use shared infrastructure, every improvement made for any client benefits all clients. A regulatory change gets handled once, properly, and applies everywhere. A security enhancement, a reporting upgrade, a performance improvement — the cost is spread across the entire client base.
In year one, the difference is modest. By year five, it's dramatic. A firm that built their own platform five years ago is now maintaining ageing architecture with whatever team they've managed to retain. A firm that chose infrastructure five years ago is running on a platform that's had continuous, compounding investment every week since — without lifting a finger.
The longer you run, the wider the gap gets. Outsourcing gets better and cheaper over time. Building your own gets more expensive and more brittle. This isn't a theory. It's a pattern we've watched repeat across the market for over a decade.
The honest version
We're not neutral here. ShareIn provides this infrastructure, and we think more firms should use it. But we also know it's not the right answer for everyone.
If you're a technology-first company with a permanent engineering team and the appetite to maintain a regulated platform indefinitely — build. You'll want the control, and you can afford the cost.
If you're a firm whose real strength is sourcing deals, managing assets, or building investor relationships — and you need a platform to operate but it's not where your value is created — then outsourcing is probably the smartest thing you can do. Not because building is impossible, but because it's the most expensive way to solve a problem that's already been solved.
The question isn't whether your platform matters. It does. It needs to be reliable, compliant, and professional. The question is whether building it yourself is the highest-value use of your time and capital — or whether that time and capital would be better spent on the thing that actually makes you money.
Most firms, once they frame it that way, already know the answer.
ShareIn provides investment platform infrastructure, loan management, ISA administration, and client money handling for alternative finance operators across the UK. If you're weighing up whether to build or outsource, we're happy to have a straight conversation about which makes more sense for your situation.