Eight things, and all eight are on every plan.
Not a feature matrix. Each of these is a decision about what the product will and will not do on your behalf, which is why each one gets a page rather than a tick in a column.
The eight, and what each one refuses.
Four of these are things Lewis does. Four are things it will not do on your behalf, and those are the ones worth reading first.
Approvals
Every draft waits for your yes, and a bare yes with two drafts pending gets a numbered list, not a guess
Copilot
Hand over the list with a permission you grant in words, and take it back the same way
The engine
One brain behind the browser demo and a real phone number, so a change made once is live on both
Why none of these is an add-on
Because the ones that matter most are refusals, and a refusal you can buy your way out of is not a refusal.
The fair-housing block, the property-fact block and the approval queue are identical on the cheapest plan and the most expensive one. There is no tier on which Lewis will assert a square footage it cannot source, and no tier on which a message goes out under your licence that you have not read, unless you have handed over that permission yourself, in words, and you can take it back the same way.
What the plans differ on is volume, seats, and the workflow a team needs. Pricing.