Clapshot

Clapshot is open-source software for teams that review video, audio, and images together. It is best for organizations that need to keep media on their own infrastructure and have the technical capacity to run it. Its review tools are capable; the cost is taking responsibility for hosting and security.

Overview

Clapshot combines synchronized viewing with feedback tied to specific moments. Reviewers can seek together, discuss time-coded comments in threads, pin notes to the timeline, and draw on media. Support for audio, images, and subtitle tracks makes it useful beyond video cuts, while shareable review links help bring collaborators into a session.

This is a self-hosted application, not a managed cloud workspace. Media is stored on the file system and metadata in SQLite, giving organizations control over where assets reside while placing deployment and ongoing operation in their hands. Docker Compose and a Debian package for Debian 12 or 13 are documented options. For internet-facing deployments, the project recommends HTTPS through a reverse proxy; monitored-folder file ownership also needs to match the intended access model.

Key features

Precise review

The browser player combines frame-by-frame navigation, loop controls, editable SMPTE timecode fields, and audio waveform visualization. Together with threaded, time-coded comments and a seven-color drawing palette, these tools make detailed feedback more practical than a general-purpose shared video player.

Flexible ingestion and processing

Teams can upload media through the web interface or process files from a monitored folder. Folder ingestion can assign users based on file ownership or folder names, which can suit established workflows but makes access configuration important. FFmpeg handles transcoding, thumbnails, and metadata extraction; custom scripts and hardware acceleration allow processing to be adapted to local needs.

Integration and extensibility

Authentication can be connected through a reverse proxy to OAuth, LDAP, Kerberos, or SAML systems. An optional notification hook can connect to email, Slack, or other systems, and a companion Slack bot can post rich link previews to allowlisted channels. Organizer plugins communicate over gRPC and can be written in Python, Rust, TypeScript, or other languages, giving technical teams room to build custom workflows.

Pricing

Clapshot (open-source self-hosted): free. The plan includes self-hosted deployment, with the server and client licensed under GPLv2. The gRPC/proto3 libraries and example organizer plugins use MIT licenses. There is no paid tier described; teams supply and operate their own hosting, so the free price does not remove the technical work of deployment and maintenance.

Platforms

Clapshot supports Windows, macOS, and Linux operating systems, with a web client and self-hosted deployment. Desktop Chrome or Chromium is recommended. Mobile browser support is limited: iOS and iPad have reported player-control issues, and drawing annotation submission can fail on mobile browsers. Teams that expect reviewers to work reliably from phones or tablets should look elsewhere.

Who it's for

Clapshot is a strong fit for organizations that cannot or do not want to place media in commercial cloud services, and that can manage networking, Linux, and deployment security. It also suits teams with technical resources to connect authentication, processing, or custom workflows to existing systems. The project itself steers people who do not need local hosting or are uncomfortable with networking and Linux toward commercial cloud services instead.

Pros and cons

• Pros: Synchronized playback, time-coded threads, timeline pins, and drawing annotations give teams several precise ways to review media together.
• Pros: Video, audio, images, and subtitle track management make the review workspace useful across more than one media format.
• Pros: Self-hosted file storage, configurable processing, and plugin support give capable teams control over media location and workflow.
• Cons: Organizations must run the service and configure security themselves, including HTTPS for internet-facing use and correct monitored-folder ownership.
• Cons: Limited mobile support and the desktop Chrome or Chromium recommendation make it a weaker fit for teams that review primarily on phones or tablets.

Alternatives

Video Review Software is the broader category to browse when comparing review tools across the field.

Choose Louper if you want an iOS, macOS, or web-based livestream room rather than Clapshot's self-hosted media-review workflow; its free plan allows one room, two participants, and 20-minute sessions, with daily session limits.

Ziflow is an option for proofing teams that prefer a cloud service and can work within the free plan's two users, 2GB storage, one workflow stage, and 60-day review history.

Ashore offers a cloud alternative for smaller teams: its free plan covers one user, 30 files per month, and 1GB storage.

Frame.io may suit teams seeking a cloud-based video review service; its free plan supports up to two members, 2GB storage, and up to two projects.

Vimeo is worth considering when video hosting is the priority and a hosted free plan with one seat and 1GB storage is sufficient.

Krock.io is another cloud review option, with a free plan for one user, 2GB storage, one workspace, two projects, and unlimited reviewers.

SyncSketch may fit non-commercial review: its Light plan includes five seats, 1GB storage, 2GB of monthly uploads, and two projects.

ViTransfer is another free, self-hosted option for teams whose priority is file transfer rather than Clapshot's review and annotation features.

Verdict

Choose Clapshot if your organization needs collaborative media review without putting assets in a commercial cloud service and can take on self-hosting. Its synchronized playback and detailed annotation tools are the main draw. Look elsewhere if you need a managed service, dependable mobile review, or a setup that does not require technical ownership.