Copilot is the right AI for the 95% of work that benefits from assistance inside the Office stack. SpectraVault is the right AI for the 5% that cannot live on anyone else's server — including Microsoft's.
The honest way to think about Copilot and SpectraVault is as two instruments in the same kit. Copilot is AI inside Microsoft's trust boundary. It is designed so that your IT department, your compliance team, your auditors, and — where required — Microsoft itself can see what the AI is doing. That is a feature, not a flaw, for most enterprise work. SpectraVault is AI outside every trust boundary, including ours. The encryption is mathematical, the keys belong to you, and we cannot read your conversations even when compelled to try.
Best for drafting, summarizing, analyzing, and reasoning over your Microsoft Graph — email, files, Teams chats, meeting transcripts — inside the apps your organization already lives in.
Trust model. Microsoft encrypts your data in transit and at rest on its servers. Microsoft holds the keys. Your tenant admin governs retention, DLP, and eDiscovery through Purview.
Compliance posture. SOC 2, ISO 27001, HIPAA BAA, FedRAMP High, CJIS, GDPR, EU Data Boundary — mature and battle-tested.
When it is the right answer. Everyday productivity work where a subpoena, an insider, or a breach would be inconvenient rather than career-ending.
Best for the conversations that must not be read by anyone: privileged legal work, M&A drafts, internal investigations, board deliberations, personal correspondence of principals.
Trust model. End-to-end encryption with post-quantum key exchange (CRYSTALS-Kyber / NIST FIPS 203). TEE-isolated inference on confidential-computing hardware. User-held keys at the Executive tier. We cannot read your content.
Compliance posture. SOC 2 in progress, HIPAA BAA available, privilege-preservation legal opinion on file, public subpoena response policy.
When it is the right answer. Any work where a breach, a subpoena, or an insider would be career-ending — and where policy assurances are not enough.
"Keep Copilot for everything that benefits from AI in Word. Use SpectraVault for the conversations that can't survive a subpoena, an insider, or a breach."
The one-sentence way to chooseThe dimensions below are the ones a CISO, general counsel, or technically literate principal will ask about in a procurement conversation. We have tried to be accurate about Microsoft 365 Copilot's capabilities and honest about where SpectraVault's differences are architectural, not marketing.
| Dimension | Microsoft 365 Copilot | SpectraVault PV |
|---|---|---|
| Encryption model | Encrypted in transit and at rest on Microsoft servers. Microsoft can decrypt. | End-to-end encrypted. SpectraVault cannot decrypt your content. |
| Post-quantum cryptography | Not offered at the chat layer. | CRYSTALS-Kyber / ML-KEM (NIST FIPS 203). |
| Key ownership | Microsoft holds keys. Customer Key and Double Key Encryption protect files at rest; Copilot inference still requires plaintext. | User-held keys (FIDO2 / passphrase) at Executive. Client-controlled key material at Sovereign. |
| Inference isolation | Runs on Azure OpenAI infrastructure. No per-session TEE attestation exposed to the user. | TEE-isolated inference with hardware attestation (H100 confidential computing). |
| Retention | Governed by M365 retention policies. Tenant admin configurable. Audit retention enforced. | Configurable encrypted memory (90 days → indefinite by tier). Ghost Mode per-session zero retention. |
| Subpoena posture | Responds to valid legal process. Can produce prompts and outputs. Transparency report published. | Architecturally can only produce ciphertext. Public subpoena response policy. |
| Insider risk | Mitigated by Microsoft's access controls and policy. | Out of architectural reach. Encryption is mathematical. |
| Audit log | Microsoft Purview audit and eDiscovery. Held by Microsoft. | Cryptographically signed audit log, exportable by the customer. |
| Training on your content | Microsoft commits not to train foundation models on your prompts. | The prompts are encrypted before they leave you. There is nothing to train on. |
| Compliance | SOC 2, ISO 27001, HIPAA BAA, FedRAMP High, CJIS, GDPR, EU Data Boundary. | SOC 2 in flight. HIPAA BAA available. ISO 27001 roadmapped. Privilege-preservation legal opinion on file. |
| Integration footprint | Deep: Word, Excel, PowerPoint, Outlook, Teams, SharePoint, OneDrive, Graph. | Standalone chat. Paste-a-link. Vertical Knowledge Packs (Legal, Therapist, CPA). Optional private RAG at Sovereign. |
| Model access | GPT-4 / GPT-4 Turbo via Azure OpenAI. | 70B-class open-weights (Qwen 72B, Llama 70B) on isolated infrastructure. |
| Web / freshness | Bing grounding. Queries leave the tenant. | Opt-in Brave, self-hosted SearXNG, or ephemeral Secure Search proxy with proof-of-purge. |
| Admin model | Tenant-admin centric. IT governs access, DLP, retention. | Individual-first. Concierge onboarding at Sovereign. |
| Price | $30 / user / month, plus the required M365 E3 ($36) or E5 ($57) base license. | $499 Professional, $1,499 Executive, from $4,999 Sovereign. |
| Designed for | Broad enterprise productivity at scale. | The specific user whose work won't survive a leak. |
Accuracy note. Information about Microsoft 365 Copilot on this page is based on publicly available sources as of April 2026 and is provided for informational and educational purposes only. Microsoft 365 Copilot's features, pricing, compliance certifications, and data-handling policies may change over time.
SpectraVault is not affiliated with, endorsed by, or otherwise associated with Microsoft Corporation. "Microsoft," "Microsoft 365," "Copilot," "Azure," "SharePoint," "OneDrive," "Teams," and related marks are trademarks of Microsoft Corporation. For authoritative and current information about Microsoft 365 Copilot, please consult Microsoft's official documentation.
A product comparison that refuses to acknowledge the other side's strengths isn't a comparison — it's an advertisement. Here is the honest breakdown.
Isn't Copilot already encrypted?
Yes — in transit and at rest on Microsoft's servers. Microsoft holds the keys and can decrypt your content. That is intentional: eDiscovery, Purview, and legal hold all require Microsoft to see plaintext. SpectraVault is end-to-end encrypted — the keys never leave the user, which means we cannot read your conversations even if compelled to.
Microsoft says it doesn't train on my data. Isn't that enough?
Microsoft's commitment is real and it is meaningful. It is also a policy commitment, not an architectural one. It does not address a rogue insider, a valid subpoena, a future change of policy, or a compromise of Microsoft's own systems. SpectraVault makes the same guarantee architecturally: prompts are encrypted before they leave you, so there is literally nothing to train on.
What about Double Key Encryption or Customer Key?
Both are excellent for files at rest in SharePoint and OneDrive, and we recommend them for that purpose. Neither protects Copilot prompts and outputs at inference time, because Copilot must see plaintext to reason over your content. SpectraVault's TEE-isolated inference means the plaintext exists only inside a hardware-attested enclave, visible to no operator.
Our IT team only wants to manage one AI vendor.
That is a reasonable default for general productivity work. For work where a breach is career-ending, one AI vendor for everything is the wrong answer — and most organizations already operate this way elsewhere. Firms run email and Signal; file shares and physical safes; commercial search and Westlaw. SpectraVault is the privileged channel. IT manages access; the user manages the keys.
Can we use both?
Yes, and most of our customers do. Copilot handles the bulk of day-to-day office work. SpectraVault handles the specific conversations that cannot cross a trust boundary — the M&A draft, the board-reserved matter, the internal investigation, the personnel letter. The two coexist cleanly.
The difference between "trust us" and "verify us" is the core of SpectraVault's discipline. Every claim on this page is paired with an artifact your counsel, CISO, or cryptographer can read.
Full description of E2EE, key derivation, FIDO2 / passphrase flow, ML-KEM key exchange, envelope encryption, and the TEE attestation chain. Written for cryptographers and their reviewers.
Third-party adversarial review of the application and infrastructure. Executive summary published; full report under NDA.
Explicit enumeration of in-scope and out-of-scope adversaries — rogue employee, subpoena, malicious co-tenant, GPU side-channel — with the specific control that addresses each.
Plain-language disclosure of what SpectraVault can and cannot produce in response to legal process. Published annually as part of our transparency report.
Business Associate Agreement available for covered entities. Pairs with a HIPAA assessment for clinical-practice buyers.
Public interface that lets any buyer verify the cryptographic attestation of the TEE serving their session. Trust, but verify — literally.
Our evaluations are candid. If Copilot is the better fit for what you are doing, we will tell you. If you are doing the kind of work we were built for, we will show you exactly how the architecture protects it.