Overview
Catastrophe modelling is the process of using computer simulations to estimate the financial and economic losses caused by extreme events like hurricanes, earthquakes, cyber breaches and terrorism. Oasis Loss Modelling Framework (LMF) has been at the leading edge of CAT modelling for over 15 years.
To meet evolving industry demands, Oasis partnered with fourTheorem to build a modern, robust, and globally scalable Oasis SaaS CAT modelling platform.
Catastrophe modelling sits at the heart of how the insurance industry prices risk and protects communities. The market urgently needs a neutral, scalable platform where every modeller can be accessed on equal terms. Working with fourTheorem, we were able to build a highly performant, enterprise-grade modelling platform in weeks. The speed and quality of delivery from the combined team has been remarkable.
– Dickie Whitaker, Oasis SaaS Chair
The Challenge
Given the overall rise in catastrophic risk, partly due to climate change, (re)insurers increasingly require the ability to:
- Run significantly larger and more complex catastrophe models
- Scale modelling workloads dynamically during peak periods
- Reduce infrastructure and operational overhead
- Improve time-to-insight for underwriting and portfolio management
- Maintain strict security and regulatory compliance standards
Thus the challenge for the team was to provide a world class multi-tenanted CAT modelling platform that could dynamically scale to meet the demands of disparate customers each with highly variable compute demands.
The Solution
fourTheorem worked collaboratively with Oasis to design and deploy the
platform end-to-end, applying a structured delivery approach built on proven accelerators:
- Foundation: Secure, compliant multi-tenant AWS infrastructure was stood up rapidly using the Landing Zone Accelerator – establishing per-tenant account isolation and security guardrails from day one.
- Model Execution: The Modelling Accelerator, combined with the Oasis
LMF framework, enabled full model execution within a matter of weeks. - Delivery: The platform was ready for customer acceptance testing ahead of schedule, without compromising on security or enterprise-grade quality.
Platform Benefits
Scale to Zero Architecture
Analysis workers only consume resources when a model run is active. Eliminating the “idle cost”.
Elastic Scaling On Demand
Compute resource scales in line with business needs, removing resource contention issues and capacity planning.
Blast-Radius Isolation
A dedicated per-tenant account structure ensures that each customer’s data are fully isolated.
Seamless Integration
A fully authenticated, secured and authorised external API is provided for customer integration into the system.
Why Use Oasis SaaS?
The Oasis SaaS platform delivers the following business benefits to (re)insurance customers:
Choice
Access to 300+ models from ~20 independent providers. 100% vendor neutral. Built by the market, for the market.
Profitability
Multi-model approaches deliver measurable advantages worth tens of millions annually for mid-sized insurers through superior risk selection.
Reduced TCO
Transparent insights into costs; optimise price/performance. No infrastructure or servers to manage.
Enterprise grade technology built on proven, scalable infrastructure.
See how fourTheorem helped Oasis bring a modern, vendor neutral CAT modelling platform to market – at speed, and built to scale.
