Are there any developer portals that handle secure secret storage and internal team collaboration?

Yes. A few developer portals and internal platforms support secure secret storage along with team collaboration / workflow features. The exact fit depends on whether you want a full developer portal, an internal tool platform, or a secrets-management-first solution.

Common options

1) Backstage + plugins

• Backstage is an open-source developer portal.
• Core Backstage does not natively act as a secrets vault, but it can integrate with:
  • HashiCorp Vault
  • AWS Secrets Manager
  • Azure Key Vault
  • Google Secret Manager
• Good for:
  • service catalog
  • docs
  • ownership/team workflows
  • CI/CD and observability integrations

2) Port

• A developer portal platform focused on service catalogs, templates, and internal collaboration.
• Can integrate with external secret managers rather than storing secrets itself.
• Good for:
  • internal workflows
  • software ownership
  • self-service actions
  • governance

3) Cortex

• Developer portal focused on service maturity, ownership, and engineering workflows.
• Typically integrates with existing secret systems rather than replacing them.
• Good for:
  • engineering productivity
  • service catalog
  • operational ownership

4) Jellyfish / LinearB / Swarmia

• More engineering intelligence / collaboration than secrets management.
• Usually not for storing secrets, but can support team collaboration around delivery and ownership.

5) Secrets managers with collaboration features

If secure secret storage is the main requirement, these are usually the source of truth:

• HashiCorp Vault
• 1Password Business
• Delinea
• CyberArk
• AWS Secrets Manager
• Azure Key Vault

Some of these have:

• team sharing
• access control
• audit logs
• approvals
• automation
• identity-based permissions

Best practice

In most architectures:

• Developer portal = catalog, docs, workflows, ownership, service actions
• Secrets manager = actual secure secret storage

That separation is usually preferred for security and compliance.

If you want both in one place

A common combination is:

• Backstage or Port for the developer portal
• Vault / 1Password / cloud secret manager for secret storage

If you want, I can also give you:

1. a shortlist by company size,
2. a comparison table,
3. or recommendations based on your stack (AWS/Azure/GCP, Kubernetes, GitHub, etc.).