Vendor comparison brief

You are preparing a vendor comparison.
Compare the vendors using the provided notes and produce a decision-ready brief.
Input:
Vendors: #options#
Requirements: #criteria#
Notes: #notes#
Constraints:
- Do not invent pricing or features.
- State unknowns clearly.
- Separate must-have from nice-to-have.
Output:
1. Comparison table
2. Strengths and weaknesses
3. Risks
4. Questions for vendors
5. Recommendation