Should You Build, Buy, or Configure Your Insurance Tech Stack?
"Build vs. Buy" Is the Wrong Question to Start With
This is Part 2 in our series on greenfield insurance builds. Part 1 covered the seven technology pieces every insurance business needs before it can sell a policy. This one covers the decision that determines your timeline and budget for building all seven: do you build, buy, or configure?
Most people frame this as a straight binary, build custom software or buy an off-the-shelf product, and that framing is incomplete. The real decision is closer to four-way: custom code built from scratch, configuration of a vendor product's built-in tooling to fit specific needs, buying an off-the-shelf product as delivered with minimal changes, or a partner model that combines a vendor product with targeted custom modules, according to a 2026 guide to custom insurance software development. Treating it as a simple binary is how greenfield projects choose the wrong option and pay for that choice eighteen months later.
The cost of getting this decision wrong is well documented, if not always discussed openly. Roughly half of attempted custom core builds for insurance platforms either fail outright, blow past budget by two times, or quietly get descoped into what's essentially a wrapper around a vendor product anyway, per the same source, drawn from a decade of work with mid-tier P&C carriers. That's not an argument against building custom software, it's an argument for knowing when custom is the right call before committing eighteen months and a seed round to the wrong one.
The Four Options, and When Each One Is Actually Right
Build: full control, at full cost and full risk
Building custom software from scratch gives you complete control over every piece of business logic, with no vendor roadmap constraining you. It also demands significant in-house resources, developers, designers, IT specialists, all pulled away from the business of actually selling insurance, and development cycles are long enough to delay your ability to respond to the market you're trying to enter, according to a core system build-versus-buy analysis for P&C insurers. Build is the right call in a genuinely narrow set of situations, when your business model doesn't fit any existing platform closely enough for configuration to bridge the gap.
Buy: speed and compliance, at the cost of flexibility
Buying a proven, vendor-supported platform gets you built-in regulatory compliance and vendor support without maintaining every line of code yourself. Startups that buy can sometimes get a pilot programme live in under 90 days, which matters for investor confidence as much as for the business itself, according to a 2026 analysis of build-versus-buy decisions for insurance startups. The trade-off is real too: you're bound by the vendor's roadmap, and if the platform wasn't designed for growth, scaling into new products or jurisdictions later can become unexpectedly difficult.
Configure: the middle path most insurers actually need
Configuration uses a vendor platform's built-in product configurators, rules engines, low-code tools, and parameter screens to encode your specific business logic without writing custom code, per the custom software guide cited above. This is increasingly where the industry is converging: insurers report 40 to 60% faster development cycles on configurable platforms compared with greenfield custom builds, according to Gartner research cited in a 2026 comparison of leading insurance core systems. The practical rule one modernisation guide offers is straightforward: configure first, customise when configuration genuinely runs out, and only custom-build when both configuration and customisation fail to cover a real business need.
Partner: buying the core, building the differentiators
The fourth pattern, increasingly common for carriers who need both speed and genuine differentiation, is to buy the operational core and build only the parts that actually differentiate the business, integrating the two via API. It's worth knowing where the real cost sits in this model too: license cost typically runs 15 to 25% of total seven-year cost of ownership, with the remaining 75 to 85% going to implementation, integration, custom development, training, and change management, according to a 2026 claims system selection framework. Carriers who select on license cost alone are, in that source's words, looking at the wrong number entirely.
Where This Leaves You, and What's Next
None of these four options is universally right, and that's the actual point: the question isn't "build or buy," it's which of the four fits your specific business model, timeline, and in-house engineering appetite. Answering that honestly before you write a single line of code, or sign a single vendor contract, is what separates greenfield builds that hit their timeline from the roughly half that don't.
A modular, configuration-first platform like the Mozart Suite is built for this middle option specifically: distribution, underwriting, claims, and billing exist as independent modules you configure to your business model, rather than code you write or a fixed product you're stuck with as delivered.
Part 3 of this series covers sequencing, once you've picked build, buy, configure, or partner for each of the seven pieces, what actually needs to exist on day one versus what can reasonably wait until day 100. If you want to talk through where your specific business model lands on this framework before that, get in touch and we'll work through it with you.
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