Claude is strongest with long documents — contracts, spreadsheets, and reports you don’t have time to read line by line.
Where ChatGPT is a quick-reply tool, Claude earns its keep on longer, messier documents — the 40-page supplier contract, the year’s worth of expense spreadsheets, the pile of customer reviews you’ve been meaning to analyze.
Getting started
- Sign up at claude.ai — the free plan covers everything below for occasional use.
- Upload the document directly into the chat (PDF, Word, Excel, or CSV all work) rather than pasting text.
- Ask one question at a time to start, then follow up. Claude keeps the document in context for the rest of the conversation.
Small-business use cases
Contract and lease review
Upload a lease or supplier agreement and ask it to summarize the obligations, flag unusual clauses, and list every date-based deadline. This is a first pass only — always have a solicitor review anything you’re about to sign.
Expense and sales spreadsheet analysis
Upload last quarter’s spreadsheet and ask for trends, anomalies, and a plain-English summary.
Turning reviews into an action list
Paste in fifty customer reviews and ask Claude to group the complaints and compliments by theme, ranked by how often each comes up.
Limits worth knowing
Claude is not a bookkeeper or a lawyer — treat every number and legal read as something to verify, not act on directly.