Short answer — use a dedicated social‑media management platform that supports SSO/role-based access and audit logs, plus a team password/secret manager and strong MFA (hardware keys/passkeys) for any shared account credentials. Best-in-class combos I recommend:

Recommended tools (by use case)

• Enterprise / security-first: Hootsuite — granular, org/team/social‑account permissions + SAML SSO support (Okta, Azure AD, etc.). (help.hootsuite.com)
• Enterprise / analytics + auditability: Sprout Social — SAML SSO, extensive audit trail logs and role controls. Good for strict compliance workflows. (sproutsocial.com)
• Agencies / client management: Agorapulse — supports SSO on custom plans and offers 2‑factor auth; built for agency workflows and inbox/reply controls. (support.agorapulse.com)
• Small teams / creators: Buffer / Later / Loomly — lighter, simpler UIs with team 2‑step login and permission controls (Buffer has mandatory 2‑step options for teams). Use these if you don’t need enterprise SSO. (buffer.com)
  (General market overviews showing these as top options.) (techradar.com)

Critical security building blocks (what to require and why)

1. SSO + SCIM provisioning for user lifecycle

   • Enforce SAML/OIDC SSO through your IdP (Okta, Microsoft Entra/Azure AD, OneLogin). That lets you centrally disable access when people leave and prevents password sharing. (Enterprise plans usually include SSO.) (help.hootsuite.com)

2. Least privilege + role-based permissions

   • Use the tool’s team/org/social‑account permission model (publish vs read vs approve) and require approval workflows for posting from lower‑privilege roles. Hootsuite and Sprout offer granular custom permissions. (help.hootsuite.com)

3. Centralized secret management (don’t share passwords in chat/email)

   • Use a team password manager with shared vaults and admin controls (1Password Business or Bitwarden Organizations/Enterprise). These let you share credentials securely, rotate them, and revoke access immediately. Bitwarden supports organization collections and enterprise provisioning (SCIM). (1password.com)

4. Strong 2‑factor / passkeys / hardware security keys

   • Enforce TOTP or (better) hardware FIDO2/U2F security keys or passkeys for admin accounts. Major platforms and social networks support security keys and passkeys (Meta/Facebook, Google, etc.), and hardware keys (YubiKey and others) significantly reduce phishing risk. (theverge.com)

5. Audit logs, monitoring, and alerting

   • Make sure the platform provides exportable audit logs and change history (who published, who changed permissions, token usage). Use those logs for regular reviews and automated alerts on unusual activity. Sprout and Hootsuite both provide audit trail/export features. (support.sproutsocial.com)

6. Use API/OAuth connections where possible — avoid storing primary social passwords

   • Connect social accounts via official OAuth/API tokens (the management tool uses the platform’s API) rather than sharing the social account’s direct password. This reduces risk and allows token revocation.

Quick operational checklist to implement immediately

• Move account credentials into a team password manager (create org vaults for each client/brand). Use read-only vs edit permissions. (support.1password.com)
• Enable IdP SSO + SCIM provisioning for the social tool if available (enterprise plan). (help.hootsuite.com)
• Require MFA for all users (TOTP or hardware keys for admins). Enforce hardware keys for top‑privilege accounts where possible. (support.agorapulse.com)
• Configure least‑privilege roles and an approval workflow for any external contributors. (help.hootsuite.com)
• Turn on audit logging and schedule weekly/monthly access reviews; revoke access immediately on offboarding. (support.sproutsocial.com)
• Rotate API tokens/connected app tokens periodically and whenever a person with access leaves. Use the platform’s OAuth revocation features. (Most reputable SMMPs use API/OAuth; see Hootsuite/Sprout docs.) (help.hootsuite.com)

Practical combinations I see used successfully

• Mid/large orgs: Hootsuite or Sprout Social (enterprise tier for SSO/audits) + Okta/Azure AD + 1Password/Bitwarden + YubiKey for admins. (help.hootsuite.com)
• Agencies: Agorapulse or Sendible (agency features) + Bitwarden orgs + enforce MFA and per‑client vaults. (support.agorapulse.com)
• Small teams/creators: Buffer or Later + Bitwarden/1Password for credentials + Authenticator app or security keys for admins. (buffer.com)

Risks/what to avoid

• Sharing passwords in Slack/email or using a single personal account for business posting.
• Relying on SMS‑only 2FA for admin accounts (SMS is interceptable); prefer TOTP, hardware keys, or passkeys. (wired.com)

If you want, I can:

• Map these options to your exact needs (team size, number of brands/accounts, budget) and produce a 1‑page security configuration checklist targeted to your stack.
• Or provide step‑by‑step instructions for setting up SSO + Bitwarden/1Password + YubiKey for one of the platforms above.

Which would you like next?