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SIDE-BY-SIDE · 2 OF 3
Two platforms.
Same questions.
Microsoft 365 Copilot
WORKFLOW & AUTOMATION
PROMPT
Microsoft does not claim ownership of customer prompts or inputs. Customer data remains customer property under Microsoft's data governance framework.
OUTPUT
Microsoft doesn't claim ownership of the output of the service. Outputs are treated as customer data.
TRAINING
Microsoft does not use M365 Copilot customer content to train foundation models. The Microsoft Privacy Statement (March 2026) states for enterprise Copilot: 'Microsoft 365 Copilot...provides enterprise-grade data protection' and 'will use the content in your files only when you ask it to perform a specific action on that specific content.' General Microsoft AI statement covers manual review of automated method outputs for improving accuracy, but enterprise Copilot data is explicitly protected.
COMMERCIAL
Microsoft 365 Copilot is available as an enterprise add-on. Commercial use of all outputs is permitted.
766 verified findings across the displayed surfaces.
Westlaw AI (Thomson Reuters)
ENTERPRISE SEARCH / PRODUCTIVITY
PROMPT
Thomson Reuters customers own all legal research queries and documents. Westlaw AI processes inputs to deliver AI-enhanced legal research.
OUTPUT
Customers own all AI-generated legal research and outputs. Thomson Reuters does not assert IP over generated research.
TRAINING
Uncertain. The corporate Privacy Statement states user data including 'content of your queries on our Services, such as artificial intelligence prompts' may be used to 'operate, improve, or personalize our Services' and 'Develop new products, services, content.' Product-specific DPA terms for Westlaw/CoCounsel were not cached and could not be reviewed.
COMMERCIAL
Full commercial use is permitted for law firm and enterprise legal deployments.
252 verified findings across the displayed surfaces.
Empty Comparison Slot
AIRIN SUMMARY
Westlaw AI (Thomson Reuters) has moderate defaults; Microsoft 365 Copilot carries the most permissive license terms of the set.FOR ENTERPRISE: MICROSOFT 365 COPILOT NOT RECOMMENDED · WESTLAW AI (THOMSON REUTERS) ENTERPRISE TIER ACCEPTABLE
↳ Compliance surfaces · side by side
⚡ INTERACTIVE RISK COMPARISON HEATMAP
| RISK SURFACE | MICROSOFT 365 COPILOT | WESTLAW AI (THOMSON REUTERS) |
|---|---|---|
| PPrompt Ownership | ||
| OOutput Ownership | ||
| TModel Training | ||
| CCommercial Use | ||
| DData Privacy | ||
| $Tier Differences |
* Click any cell in the heatmap matrix to scroll directly to its verbatim policy citations below.
📂 Intellectual Property & Model Training
P
SURFACE 01
Prompt Ownership
Microsoft 365 Copilot
HIGH⚠ CAUTIONHIGH
Microsoft does not claim ownership of customer prompts or inputs. Customer data remains customer property under Microsoft's data governance framework.
“When you provide your Data or Your Content to Bing Places, you grant Microsoft a worldwide, royalty-free license to use, reproduce, save, modify, aggregate, promote, transmit, display, and distribute your Data and Your Content (including intellectual property rights in your Data…”
Broad, worldwide, royalty-free license over user inputs/content submitted to Bing Places, including sublicensing rights to third parties with no apparent scope limitation or termination right described here.
Westlaw AI (Thomson Reuters)
MEDMED
Thomson Reuters customers own all legal research queries and documents. Westlaw AI processes inputs to deliver AI-enhanced legal research.
“ Personal information in content and communications uploaded, sent, shared, or inputted through our Services or via our networks and infrastructure, including feedback you provide to us and the content of communications between you and us or sent via our network and Services — in…”
O
SURFACE 02
Output Ownership
Microsoft 365 Copilot
HIGH⚠ CAUTIONHIGH
Microsoft doesn't claim ownership of the output of the service. Outputs are treated as customer data.
“As part of building the Xbox Services community, you grant to Microsoft, its affiliates and sublicensees a free and worldwide right to use, modify, reproduce, distribute, broadcast, share and display Your Content or your name, gamertag, motto, or avatar that you posted for any Xb…”
Broad, royalty-free, worldwide license granted to Microsoft and its sublicensees to use, modify, reproduce, distribute, broadcast, share and display user-submitted content with no expiry stated.
Westlaw AI (Thomson Reuters)
MED⚠ CAUTIONMED
Customers own all AI-generated legal research and outputs. Thomson Reuters does not assert IP over generated research.
“ All content provided on this site is owned by or licensed to Thomson Reuters and/or its affiliates (the "Thomson Reuters Content") and protected by United States and international copyright laws. Thomson Reuters and its licensors retain all proprietary rights to the Thomson Reut…”
T
SURFACE 03
Model Training
Microsoft 365 Copilot
HIGH⚠ CAUTIONHIGH
Microsoft does not use M365 Copilot customer content to train foundation models. The Microsoft Privacy Statement (March 2026) states for enterprise Copilot: 'Microsoft 365 Copilot...provides enterprise-grade data protection' and 'will use the content in your files only when you ask it to perform a specific action on that specific content.' General Microsoft AI statement covers manual review of automated method outputs for improving accuracy, but enterprise Copilot data is explicitly protected.
“As part of our efforts to improve and develop our products, we may use your data to develop and train our AI models. Learn more here .”
Microsoft explicitly reserves the right to use user data to train AI models. This appears twice in the document, suggesting it applies broadly across products and tiers.
Westlaw AI (Thomson Reuters)
MED
Uncertain. The corporate Privacy Statement states user data including 'content of your queries on our Services, such as artificial intelligence prompts' may be used to 'operate, improve, or personalize our Services' and 'Develop new products, services, content.' Product-specific DPA terms for Westlaw/CoCounsel were not cached and could not be reviewed.
No citation available
C
SURFACE 04
Commercial Use
Microsoft 365 Copilot
HIGH⚠ CAUTIONHIGH
Microsoft 365 Copilot is available as an enterprise add-on. Commercial use of all outputs is permitted.
“The articles, text, photos, maps, videos, video players, and third-party material available on Bing and MSN, including through Microsoft bots, applications and programs, are for your noncommercial, personal use only. Other uses, including downloading, copying, or redistributing t…”
Bing and MSN content is restricted to noncommercial personal use. Using outputs/materials to build products or for commercial purposes requires explicit Microsoft authorization, which is not granted by default.
Westlaw AI (Thomson Reuters)
HIGH⚠ CAUTIONMED
Full commercial use is permitted for law firm and enterprise legal deployments.
“Thomson Reuters grants you a limited license to access and make personal use of this site, subject to the Terms. This site and any portion hereof may not be reproduced, duplicated, copied, downloaded, sold, resold, visited, or otherwise exploited for any commercial purpose withou…”
Use is restricted to personal, non-commercial purposes only. Any commercial exploitation of site content or outputs requires explicit prior written consent from Thomson Reuters, which may be withheld.
📂 Data Privacy & Governance
D
SURFACE 05
Data Privacy
Microsoft 365 Copilot
HIGH⚠ CAUTIONHIGH
Enterprise/commercial M365 Copilot provides strong data protection — content not used for training, enterprise-grade compliance. Consumer Microsoft products (Bing, Cortana, etc.) have broader licenses. Bing Places grants a 'worldwide, royalty-free license to use, reproduce, save, modify, aggregate, promote, transmit, display, and distribute your Data and Your Content...and sub-license any or all of the foregoing rights to third parties.'
“If you fail to remove excess content or obtain sufficient additional storage after receiving notice from Microsoft, we reserve the right to delete or disable access to Your Content.”
Microsoft may permanently delete Outlook.com user content upon storage quota breach without a defined grace period in this clause.
Westlaw AI (Thomson Reuters)
HIGH⚠ CAUTIONMED
Westlaw AI (including CoCounsel) is an enterprise subscription product. Separate Master Subscription Agreement and DPA would govern enterprise customers. Product-specific terms not cached.
“Demographic information Age; date of birth; marriage status; gender; physical characteristics; military status; political, religious, or philosophical beliefs; sexual orientation; racial or ethnic origin; and union membershi”
TR collects special categories of personal data under GDPR Article 9 (political beliefs, religious beliefs, sexual orientation, racial/ethnic origin, union membership), which require explicit legal bases and heightened protections.
$
SURFACE 06
Tier Differences
Microsoft 365 Copilot
MED⚠ CAUTIONHIGH
Enterprise/commercial M365 Copilot provides strong data protection — content not used for training, enterprise-grade compliance. Consumer Microsoft products (Bing, Cortana, etc.) have broader licenses. Bing Places grants a 'worldwide, royalty-free license to use, reproduce, save, modify, aggregate, promote, transmit, display, and distribute your Data and Your Content...and sub-license any or all of the foregoing rights to third parties.'
“ f. Refund Policy. Unless otherwise provided by law or by a particular Service offer, all purchases are final and non-refundable. If you believe that Microsoft has charged you in error, you must contact us within 90 days of such charge. No refunds will be given for any charges mo…”
Westlaw AI (Thomson Reuters)
MED
Westlaw AI (including CoCounsel) is an enterprise subscription product. Separate Master Subscription Agreement and DPA would govern enterprise customers. Product-specific terms not cached.
No citation available