Base for lawyers: client intake and matter collaboration with source-backed answers
A matter starts with documents arriving from everywhere: email attachments, uploads, forwarded threads, and then the questions about them. Give each matter a Base. The client adds documents to it directly, Base reads them into a timeline, the people and organizations involved, and facts that each keep their source quote, and you and the client work from it under access you set per person, each in the AI you already use.
Updated November 2, 2026
Three ways lawyers use Base
- Collect intake. Invite the client to the matter's Base as a contributor, and they add documents and new versions from the browser or their own AI. On Pro, the Base also has its own email address, so the client can forward a thread straight in.
- Organize the matter. Base reads every document into a timeline, the people and organizations involved, and facts with the sentence they came from, and flags dates and figures that disagree between documents instead of picking one.
- Work with the client. Ask the Base questions and get answers that cite the document and passage. Edit a Word document from your AI and the change arrives as tracked changes, keep the discussion on threads, and keep every earlier version.
An illustrative example
This example is illustrative, not a client's matter. A lawyer opens a Base for a commercial lease dispute and invites the client's operations manager as a contributor.
- The client uploads the lease, two amendments and a year of correspondence. Base builds the timeline and flags that the two amendments give different rent figures for the same period, each with its quote.
- The lawyer asks Claude when notice was given under the lease, and the answer cites the letter and the clause.
- The lawyer edits the draft response letter from Claude; the client reviews the tracked changes in Word, and the thread on the letter records the decision.
Why lawyers choose Base
- Every answer is tied to its source. A fact whose quote cannot be found in the document is dropped, not shown.
- Access is set per person and per matter. A client joins one Base by email and sees nothing else of yours; on Pro you can limit a viewer to particular documents; removing someone takes effect on their next request.
- Conflicts in the record surface on their own: when documents disagree on a figure, Base shows both, each with its quote.
- Nothing is lost: every version is kept. Deleting a document keeps it in the Base's history, and erasing it from history is a separate, confirmed step in the web app.
- You work in the AI you already use, and so does the client.
See an example
Open the example Series A financing Base: the term sheet, cap table, investor memo, financial model and board minutes of a corporate financing, with every figure cited to the document it came from. All names and numbers in it are fictional.
Questions
How does a client send us documents?
Invite them to the matter's Base as a contributor. They add documents and new versions from the browser or their own AI, and on Pro they can also email them to the Base's own address. A viewer can read but not add documents.
Can the client see our internal notes?
Only what their role and access allow. Keep internal work in a separate Base, or invite the client as a viewer limited to particular documents on Pro; a fact or summary reaches a viewer only when they can see every document behind it.
What happens when a new version of a document arrives?
Base keeps the earlier version, reads the new one, usually within a few minutes, and marks a figure the new version updates as superseded. Everyone's AI sees the change on its next call.
Does the client need to buy anything?
No. Invited people sign in with a one-time link and use Base free. Credits come from your workspace when the Base reads new documents.
What does it cost?
Base is free for 2 Bases with 300 credits and no card, and Pro is $20 a month per workspace, not per seat.
Try it with your own documents
Free for your first Bases, no card. Every new account starts with a Base that explains Base, so there is a cited answer to inspect right away.