LinkedIn now lets multiple profiles or Pages co-author one post, listing every collaborator at the top and delivering the content across all their networks. It uses an invite-and-accept flow like Instagram’s collab posts and works for both personal profiles and brand Pages. The feature is in beta and aims to boost reach, credibility, and shared ownership in creator-brand partnerships.

• LinkedIn is beta-testing Collaborative Posts, letting two or more profiles/pages co-author a single post with equal billing (unlike a tag or mention), and it appears in each collaborator's feed.
• It requires opt-in via Me → Settings → Notifications → Collaborations, and page participation requires a super admin to enable and accept invites.
• Key details remain unknown—like the max number of collaborators or whether analytics are shared—though Instagram's version caps at six collaborators with shared metrics for comparison.
• Intended uses include brand-creator partnerships, employee amplification, event recaps, product launches, and customer spotlights, all leveraging shared authorship for added credibility.