Investors distrust top-down claims like "the CRM market is $50B". Bottom-up sizing starts with countable customers and builds up.
Define a specific customer segment, find a credible count, multiply by your price or ARPU, then apply a realistic adoption rate. AI can help find data sources and sanity-check your assumptions. Cite your sources and be honest about the adoption rate.
See the TAM/SAM/SOM glossary entry and the market slide guide.
Be specific about differentiators, show 3 to 5 relevant competitors, own your weaknesses, and revisit the analysis quarterly. Investors will ask about competitors, so know the landscape.
Your projections are only as good as your assumptions. Set pricing, growth rate, and costs first, then review the revenue forecast and cost structure that follow from them.
Use a customer-based model if you have some traction, or a cohort model to show expansion and churn. Avoid hockey-stick growth with no driver behind it. Sync the result to the Financials section of your pitch.