Turn this comparison into procurement-ready diligence
Free shows today's risk. A Stack Audit gives you a citable, verbatim-sourced PDF across your whole AI stack — and flags the moment a vendor's terms change.
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.
Spellbook
ENTERPRISE SEARCH / PRODUCTIVITY
PROMPT
Law firm customers own all contract documents and legal inputs. Spellbook (Rally Legal) processes documents for AI contract review and drafting.
OUTPUT
Customers own all AI-generated contract language, suggestions, and redlines. Spellbook does not assert IP over outputs.
TRAINING
Unknown — cached spellbook-ai_tos.txt contains policy text in a single HTML line (line 362) exceeding the 25,000-token Read tool limit. Core IP and data use sections (1–12) are inaccessible. Sections 13.7–13.13 (dispute resolution, governing law: New York) were readable. Privacy file has same structure issue.
COMMERCIAL
Commercial use is fully permitted for legal practice and enterprise contract management.
177 verified findings across the displayed surfaces.
Empty Comparison Slot
AIRIN SUMMARY
Microsoft 365 Copilot carries highly permissive license terms; Spellbook carries highly permissive license terms.FOR ENTERPRISE: MICROSOFT 365 COPILOT NOT RECOMMENDED · SPELLBOOK NOT RECOMMENDED
↳ Compliance surfaces · side by side
⚡ INTERACTIVE RISK COMPARISON HEATMAP
| RISK SURFACE | MICROSOFT 365 COPILOT | SPELLBOOK |
|---|---|---|
| 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.
Spellbook
MED⚠ CAUTIONHIGH
Law firm customers own all contract documents and legal inputs. Spellbook (Rally Legal) processes documents for AI contract review and drafting.
“ (b) This Agreement does not grant Customer any intellectual property license or rights in or to the Spellbook AI Platform or any of its components, except to the limited extent that such rights are necessary for Customer's use of the Spellbook AI Platform as specifically au…”
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.
Spellbook
MEDHIGH
Customers own all AI-generated contract language, suggestions, and redlines. Spellbook does not assert IP over outputs.
“ 6.2. Feedback. ”
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.
Spellbook
MED⚠ CAUTIONHIGH
Unknown — cached spellbook-ai_tos.txt contains policy text in a single HTML line (line 362) exceeding the 25,000-token Read tool limit. Core IP and data use sections (1–12) are inaccessible. Sections 13.7–13.13 (dispute resolution, governing law: New York) were readable. Privacy file has same structure issue.
“ (iv) No Third Party LLM Model Training. Customer Data transmitted to Third Party LLMs via the Spellbook AI Platform will not be used to train, improve, or develop the AI models of those Third Party LLMs. Accordingly, Spellbook will ensure that all Third Party LLMs are prohibited…”
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.
Spellbook
MED⚠ CAUTIONHIGH
Commercial use is fully permitted for legal practice and enterprise contract management.
“ (i) reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code or underlying algorithms of the Spellbook AI Platform;”
📂 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.
Spellbook
MED⚠ CAUTIONHIGH
—
“ (a) Spellbook collects and uses categories of Personal Data from the Customer and its Users that are required to administer Customer's Spellbook account, including payment records and credit cards. Otherwise, Spellbook only collects and uses Personal Data as necessary to pr…”
$
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…”
Spellbook
MED⚠ CAUTIONHIGH
—
“ (b) Spellbook reserves the right to discontinue or modify its provision of any Beta Features to the Customer at any time, with or without notice;”