By Google DeepMindLondon, United Kingdom6 products across 6 categories
Built for this. You upload the sources and it answers only from them, linking every sentence to the passage it came from. The strongest verification pattern here.
Free plan
Yes
Free, and the core product is not gated: what a paid plan buys is headroom — a bigger notebook
Month to month
$4.99/mo
Google AI Plus
Billed yearly
$4.17/mo
$49.99 a year, Google AI Plus plan −16%
Watch out: Deliberately limited — it will not answer what your documents do not cover, and cannot tell you whether they are any good. Paid headroom comes from a Google AI subscription rather than a plan of its own.
All plans (4)
Plan
Price
What you get
Free
$0
Free, and the core product is not gated: what a paid plan buys is headroom — a bigger notebook, more sources per notebook and higher limits on Audio and Video Overviews and Slides
Google AI Plus
$4.99/mo
the cheapest step that raises its limits, with more Gemini access, increased feature limits and a bigger notebook. Introductory offers were showing: $1.29/month for 3 months, or $44.99 for the first year
Google AI Pro
$19.99/mo
expanded Gemini access for complex research, expanded feature limits and a large notebook size. Introductory offers were showing: $4.99/month for 3 months, or $179.99 for the first year
Google AI Ultra
$99.99/mo
the highest Gemini access and the largest source limits, for working across several big notebooks
By MicrosoftRedmond, United States1 product across 1 category
Built for this. Sits inside Word, Excel, Outlook and Teams, so it works on the documents and meetings a company already has. The closest thing to AI that needs no change of habit.
Free plan
No
Paid from the start
Month to month
$25.20/mo
Microsoft 365 Copilot Business, sold to teams rather than to one person
Billed yearly
$21/mo
Microsoft 365 Copilot Business plan −17%
Watch out: An add-on rather than a standalone purchase: the enterprise Copilot seat is $30 a user a month on top of a qualifying Microsoft 365 licence you must already hold, and Copilot Chat is only included if you already pay for an eligible subscription. Agents need an Azure subscription on top again.
All plans (5)
Plan
Price
What you get
Microsoft 365 Copilot Business
$25.20/mo · $21/mo yearly
an add-on to an existing Microsoft 365 plan rather than a subscription in its own right
Microsoft 365 Business Standard with Copilot
$28.20/mo · $23.50/mo yearly
the Microsoft 365 apps across devices with Copilot built in
Microsoft 365 Business Premium with Copilot
$38.40/mo · $32/mo yearly
the same again with the advanced security tier
Microsoft 365 Copilot, the enterprise seat
$30/mo yearly
Microsoft 365 Copilot Chat
included at no additional cost for Microsoft Entra users on an eligible Microsoft 365 subscription, though agents need an Azure subscription and Copilot Studio capacity is bought prepaid
Two things separate these and both are on every card.
Fit
Whether a tool is built for this job, a strong fit for it, or
able to do it without that being its focus.
Free plan
Whether there is a tier you can keep using rather than a
trial that expires.
The order
Fit first, then a free plan, then alphabetical. There is
no score, no weighting we decline to publish, and nothing on this site a company can buy.
Questions
What is the best ai legal tools?
There is no single answer, which is why this page lists 4 rather than one: Claude, ChatGPT, Microsoft 365 Copilot, Gemini Notebook. 4 of them are built for this kind of work rather than able to do it. Start with a free one.
Which of these have a free plan?
3 of the 4: Claude, ChatGPT, Gemini Notebook. Free means a real free tier you can keep using, not a trial that expires.
How was this list chosen?
By hand, from the 750 products this site tracks, and it is checked against the catalogue on every build — a product renamed or removed breaks the build rather than quietly disappearing from here. Nothing on this site can be paid for: no listing, no position, no wording.
