🏢 Private On-Premise Recommended
LLM runs on your own hardware inside your office
- ✓ Client data never leaves your servers
- ✓ Air-gapped deployment available — zero internet
- ✓ Your IT policies apply directly
- ✓ Inherits your existing certifications (ISO 27001 etc)
- ✓ Complete audit trail under your control
☁️ AWS Bedrock / Private Cloud Recommended
Foundation model in your dedicated cloud account
- ✓ Data processed inside your cloud account only
- ✓ UK data residency available
- ✓ Your encryption keys
- ✓ Vendor cannot access data or use for training
- ✓ No on-premise hardware required
🛡️ Managed Private Cloud
Dedicated infrastructure managed on your behalf
- ✓ Fully isolated from other customers
- ✓ Zero IT overhead for your team
- ✓ Data stays within managed perimeter
- ~ Managed by third party (contractual protection)
🌐 Public Cloud SaaS Non-sensitive only
ChatGPT, Copilot, Google Gemini — shared infrastructure
- ✕ Data leaves your infrastructure
- ✕ Processed on vendor-managed servers
- ~ Enterprise tiers: vendor promises no training use
- ✓ Appropriate for internal, non-sensitive work only
For professional services handling client-confidential information: private on-premise or AWS Bedrock. The question is not whether to trust the vendor — it is whether your client's data should ever be in a position where trust is required.