What's a good way to size the market for a new SaaS productivity tool?

Quick shortcut: pull the number of mid-size tech companies from LinkedIn Sales Navigator or Crunchbase (filter by industry + employee count), multiply by your estimated ACV, and that's a rough TAM in under an hour. For benchmarking, check if any public SaaS competitors have disclosed their addressable market in investor decks or S-1 filings — it saves a ton of guesswork. Don't overthink it at this stage; a ballpark within the right order of magnitude is good enough to move forward.