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For a small 'stair-step' business like a Shopify app, calculating the Total Addressable Market (TAM) is a distraction. The critical metric is the Total Reachable Market (TRM), which for platform businesses, translates directly to your ability to rank in the app store and get discovered by users.

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Don't compare your niche content's views to mass-market entertainment. A video for business owners getting 100,000 views might represent a huge portion of its total addressable market (TAM), making it far more successful than a viral video with millions of untargeted views. Contextualize your metrics against your market size.

The static size of a Total Addressable Market (TAM) is a misleading metric for big ideas. A better evaluation framework focuses on two questions: Will the product's innovation cause the existing TAM to grow multiple times over? Can the company layer on additional, new TAMs over its lifetime?

The slow growth of public SaaS isn't just an execution failure; it's a structural problem. We created so many VC-backed companies that markets became saturated, blocking adjacent expansion opportunities and creating a 'Total Addressable Market (TAM) trap'.

For AI companies experiencing explosive growth like Harvey (tripling ARR in a year), traditional TAM analysis is an obstacle, not a tool. Such growth signals the company is capturing a new budget pool (e.g., labor costs) that dwarfs the existing software market. In these cases, the revenue trajectory itself becomes the best indicator of the true TAM.

The conversation around Ideal Customer Profile (ICP) has evolved beyond simple refinement. With newly accessible data, companies are fundamentally re-evaluating their Total Addressable Market (TAM), challenging long-held assumptions about who their potential customers are and how big the opportunity is.

When investors criticize a small Total Addressable Market (TAM), reframe it as a strategic 'wedge.' Show the sequence: dominate this initial niche, then use that beachhead to expand into adjacent markets, demonstrating a clear, credible path to scale.

Dara Khosrowshahi argues that entrepreneurs over-index on Total Addressable Market (TAM), which he sees mainly as a fundraising tool. The real focus should be on proving product-market fit and solid unit economics in a small, defensible niche. Once that's established, you can expand into adjacent markets.

Palta shut down 'Weatherwell,' an app with strong product-market fit and high retention. The decision was purely strategic: its addressable market, though dedicated, was too narrow to support their goal of building $100M+ revenue businesses, demonstrating ruthless focus on scale potential.

The "stair-step method" mitigates the dual complexity of building and marketing a SaaS from scratch. By first launching a simpler add-on within a marketplace like Shopify or Heroku, founders can leverage a built-in marketing channel, allowing them to master the technical and product challenges of SaaS.

The boom in tools for data teams faded because the Total Addressable Market (TAM) was overestimated. Investors and founders pattern-matched the data space to larger markets like cloud and dev tools, but the actual number of teams with the budget and need for sophisticated data tooling proved to be much smaller.