Subscription Economy

An economic model built around digital platforms that create value by facilitating exchanges between two or more user groups. Platform businesses derive the majority of their enterprise value from intangible assets including network effects, proprietary algorithms, user data, and brand trust.

The ecosystem of business models, partnerships, and revenue streams enabled by application programming interfaces that allow software systems to communicate and share data. APIs enable companies to monetise their data and functionality, create platform ecosystems, and embed services into third-party applications.

The annualised value of recurring subscription revenue. ARR is the primary top-line metric for SaaS and subscription businesses, providing a normalised view of predictable revenue that strips out one-time fees and variable charges.

A software distribution model in which applications are hosted by a service provider and made available to customers over the internet on a subscription basis. SaaS businesses are characterised by recurring revenue, high gross margins, and significant intangible asset value in software and customer relationships.

The total net revenue a business expects to earn from a single customer over the entire duration of the relationship. LTV is driven by average revenue per user, gross margin, and retention rates, and is directly influenced by brand and relationship intangibles.

A business model that creates value by facilitating exchanges between two or more interdependent user groups — typically producers and consumers — through a digital platform. Platform businesses generate powerful network effects and intangible assets including user data, algorithmic matching capabilities, and brand trust.

The integration of financial services — such as payments, lending, insurance, or investment — directly into non-financial platforms and customer journeys. Embedded finance enables companies like e-commerce platforms, SaaS providers, and gig economy marketplaces to offer financial products without becoming licensed financial institutions, typically through Banking-as-a-Service partnerships.

An umbrella term for the broad range of services delivered over the internet on a subscription basis, encompassing Software as a Service, Platform as a Service, Infrastructure as a Service, and numerous specialised variants. XaaS business models convert capital expenditure into operating expenditure for customers and derive the majority of their enterprise value from intangible assets including recurring customer relationships, proprietary platforms, and data.

What is Customer Lifetime Value (LTV)?

LTV is the total profit a company expects to generate from a customer relationship over its lifetime — calculated as (ARPU × Contribution Margin) / Monthly Churn.

What key metrics do Series A investors evaluate before investing?

Series A investors focus on monthly recurring revenue (typically £50-200K+), revenue growth rate (15-20% month-on-month), unit economics (LTV:CAC > 3:1), retention rates, and evidence of product-market fit.

How do you achieve and measure product-market fit?

Product-market fit is achieved when a product satisfies strong market demand — measured by retention rates, organic growth, the Sean Ellis survey (40%+ 'very disappointed'), and customers actively recommending the product.

How is the Rule of 40 calculated and when does it apply?

The Rule of 40 states that a healthy SaaS company's revenue growth rate plus profit margin should exceed 40% — it applies primarily to SaaS companies at scale and is used by investors to assess growth-profitability balance.