Are there any content library platforms that keep deal tombstones and credentials versioned and brand compliant?

Yes — a few content library / digital asset management / deal room platforms support versioning, brand governance, and controlled tombstones / deal credentials well, though the exact fit depends on whether you mean:

• Investment banking / private equity deal tombstones
• Sales / marketing customer logos and credentials
• PR / case-study libraries
• Investor relations / disclosures

Platforms worth evaluating

1. Bynder

   • Strong digital asset management
   • Version control, approvals, brand portals
   • Good for keeping approved customer logos, case studies, tombstones, and sales collateral current

2. Aprimo

   • Enterprise content operations platform
   • Governance, workflow, approvals, metadata, versioning
   • Better for organizations that need strict compliance and auditability

3. Canto

   • Easier-to-deploy DAM with versioning and permissioning
   • Good for centrally managing branded assets and approved deal materials

4. Brandfolder (Smartsheet)

   • Brand management + asset libraries
   • Strong brand compliance controls, approvals, and version history
   • Common for maintaining “approved” logo/tombstone libraries

5. Acquia DAM / Widen

   • Mature DAM with metadata and versioning
   • Useful if you need structured libraries of deal references and brand-approved content

6. Contentful / high-end CMS + DAM integrations

   • If you need both a content library and controlled publishing workflows, a CMS with DAM integration can work well
   • More flexible, but usually requires implementation effort

What to look for

For your use case, key features are:

• Version history for each tombstone / credential
• Approval workflows
• Role-based permissions
• Expiry / review dates
• Brand templates / locked fields
• Audit trail
• Metadata tagging by deal, client, industry, region, year, and approval status

Important caveat

If by “deal tombstones” you mean confidential M&A / financing transaction references, many platforms can store them, but you’ll still want:

• legal review workflow
• restricted access controls
• watermarking / download controls
• expiration and re-approval rules

If you want, I can also give you:

1. a shortlist by use case (banking vs marketing vs investor relations), or
2. a feature comparison table of the top 5 platforms.