Sending a client a big file should not mean renting seats on someone else's cloud, and PlikShare turns your own server into a file sharing platform with unlimited users, unlimited workspaces, and no per-seat pricing. Its central idea is the box: a controlled gateway between your folders and the outside world, where you invite collaborators, mint anonymous links, and decide who may upload, download, preview, or drop files into an upload-only inbox. Quick share links carry custom slugs, expiry dates, passwords, and download caps, and every box can embed into another website as a live widget whose permissions update the moment you change them. Storage is your choice per workspace, from the server's own disk to S3, Cloudflare R2, Backblaze B2, Azure Blob, Google Cloud Storage, or any S3-compatible server, and each storage picks one of three encryption modes, including full encryption where names and contents are sealed with keys derived from each user's password. Bulk uploads arrive as a single zip that rebuilds its folder structure on landing, bulk downloads assemble from an explorer tree, and previews cover video, audio, PDFs, Markdown with diagrams, and even the inside of zip archives. Single sign-on through multiple OIDC providers, granular admin roles, an optional MCP server for scoped AI agents, and OCR or chat integrations round out a platform that stays lean on a small server. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.