Clapshot

Clapshot is self-hosted software for collaborative review of video, audio, and image files. It is best suited to organizations that need to keep media on their own infrastructure and can manage a Linux-oriented deployment. Its focused review tools are a strong reason to consider it; limited mobile support and the work of running it make hosted alternatives a better fit for many teams.

Overview

Clapshot brings reviewers together around media without placing the files in a commercial cloud service. Participants can share viewing sessions with synchronized playback and seeking, then discuss specific moments through time-coded threaded comments, timeline pins, and drawing annotations. Subtitle track management, audio, and image support broaden its usefulness beyond video cuts.

The trade-off is operational responsibility. Clapshot stores media on the file system and metadata in SQLite, so the organization running it controls its environment but must also handle deployment and access configuration. Docker Compose and a Debian package for Debian 12 or 13 are documented deployment routes. For internet-facing use, the project recommends HTTPS through a reverse proxy and warns that monitored-folder file ownership must match the intended access model.

Key features

Precise, shared review

The browser client combines real-time synchronized playback and seeking with frame-by-frame navigation, looping, editable SMPTE timecode fields, and an audio waveform display. Threaded comments, timeline pins, and drawing annotations offer distinct ways to explain a note; the seven-color palette helps distinguish marks. This is a substantial toolkit for teams that need feedback tied closely to media, rather than a simple file-sharing link.

Ingestion and processing

Teams can upload media through the web interface or have Clapshot process files from a monitored folder. Folder ingestion can assign users according to file ownership or folder names, which can suit established local workflows but makes correct ownership configuration important. FFmpeg handles transcoding, thumbnail generation, and metadata extraction, with custom scripts and hardware acceleration available for tailored processing.

Integration and extension

Authentication can be connected through a reverse proxy to systems such as OAuth, LDAP, Kerberos, or SAML. An optional notification hook can connect to email, Slack, or other systems, and a companion Slack bot can post rich link previews in channels using Socket Mode and a channel allowlist. Organizer plugins communicate over gRPC and can be written in Python, Rust, TypeScript, or other languages, giving technically capable teams room to adapt workflows.

Pricing

Clapshot is free: the self-hosted plan costs nothing and includes deployment under the GPLv2 server and client license. There is no paid tier to trade against that offer; the price advantage comes with the responsibility to provide and operate the hosting yourself. The gRPC/proto3 libraries and example organizer plugins use MIT licenses.

Platforms

Clapshot supports Linux, macOS, and Windows operating systems, with a web client and self-hosted deployment. Mobile browser support is limited: the project reports iOS and iPad player-control issues and failures submitting drawing annotations from mobile browsers. Desktop Chrome or Chromium is recommended, so teams whose reviewers primarily use phones or tablets should look elsewhere.

Who it's for

Clapshot fits organizations with a firm preference or need to keep media on their own infrastructure, especially those able to manage networking, Linux, and security configuration. Its broad media support and precise collaborative tools can serve teams reviewing more than video alone. The project itself points users who do not need local hosting or are uncomfortable with networking and Linux toward commercial cloud services instead.

Pros and cons

• Pros: Synchronized sessions, time-coded threads, pins, and drawing tools keep feedback anchored to the media.
• Pros: Video, audio, images, and subtitle tracks are supported, with FFmpeg processing and configurable scripts.
• Pros: Self-hosting, reverse-proxy authentication options, and gRPC plugins give organizations control over deployment and customization.
• Cons: Hosting, HTTPS configuration, and monitored-folder permissions are operational responsibilities, not managed-service conveniences.
• Cons: Mobile browser limitations make it a weaker choice for review teams that depend on phones or tablets.
• Cons: Desktop Chrome or Chromium is recommended, narrowing the preferred browser setup.

Alternatives

Compare video review software if you want to assess a wider set of review tools.

• Louper is worth considering for livestream review on iOS, macOS, web, or Windows; its free plan allows one livestream room, two participants per room, and sessions up to 20 minutes, with limited sessions per day.
• Ziflow may suit teams seeking a hosted proofing workflow: its free plan includes unlimited proofs and reviewers, but limits the account to two users, 2GB storage, one workflow stage, and 60 days of review history.
• Ashore is another hosted freemium option; its free plan allows one user, 30 files per month, and 1 GB storage.
• Frame.io is a hosted alternative with a free plan capped at two members, 2GB storage, 2GB mounted storage, and up to two projects.
• Vimeo may fit users seeking a broader video platform; its free plan includes one seat and 1 GB storage.
• ViTransfer is another free self-hosted option, with storage limited by your own hardware.
• Cage offers a hosted free plan for one user and one project, with 2 GB storage and unlimited reviewers.
• Krock.io is a hosted alternative whose free plan includes one user, 2 GB storage, one workspace, two projects, and unlimited reviewers.

Verdict

Choose Clapshot if keeping media on your own infrastructure matters more than having a managed service and your organization can handle deployment and security. Its synchronized review, detailed annotations, and configurable processing make a compelling free package for technically capable teams. Look elsewhere if mobile review or a turnkey cloud workspace is central to how your collaborators work.