Top 8 best Krock.io alternatives in 2026

Synced browser review for animation and VFX, built around frame-accurate draw-overs.

SyncSketch runs group review sessions in the browser, where reviewers sketch over a frame with brushes, add text notes and step through shots together. It reviews 3D models and 360 images as well as video, links to Maya and Flow Production Tracking, and is owned by Unity. Indie is $9 per user a month on yearly billing; the free Light plan allows 5 users, 2 projects and 1GB.

Adobe's review platform, a fit when animation moves into editorial in Premiere Pro or After Effects.

Frame.io takes frame, range and pinned comments with drawing tools, and clients comment on share links without an account. Version stacks compare takes, a status field marks each version, and panels bring notes into Premiere Pro and After Effects. The free plan covers 2 members and 2GB; Pro is $13 per member a month on annual billing for up to 5 members, with 2TB included.

Video review with a clear approve or reject step for clients, and unlimited reviewers.

Wipster ties each comment to a timecode and pins it to a point or a box on the frame, and reviewers asked to approve choose Approved or Not Approved. Reviewers need no account. Extensions bring notes into Final Cut Pro, Premiere Pro and After Effects. Light is $9.95 a month on annual billing for one person; Team is $19.95 per user a month. There is a trial and no free plan.

Open-source production tracking for animation studios, with review, dailies and a synced review room built in.

Kitsu tracks shots and assets through production and reviews them in place, with pencil drawing, shapes, frame tags that act as timestamps and onion skinning. Task statuses such as Waiting for Approval and Retake drive the review, and guests comment and draw from a public link. It is open source and free to self-host; hosted plans start at €20 per user a month on annual billing.

Staged approvals across video, design and documents, for studios whose clients review in rounds.

Filestage moves each file through reviewer groups stage by stage and marks every version in review, needs changes or approved. Reviewers join with an email address and leave time-stamped or drawn notes. The free plan allows one active project, five new files a month and 2GB; Starter is $199 a month on yearly billing with 10 seats.

Frame-accurate review with live sessions, for renders already stored in Dropbox.

Replay reviews files straight from Dropbox with time-coded and range comments, drawing on the frame and live review sessions, and each file can be marked needs review, in progress or approved. It links into Premiere Pro, After Effects, DaVinci Resolve, Final Cut Pro, Pro Tools and LumaFusion. The full add-on is $10 per user a month on annual billing and needs Dropbox Plus or higher.

Post-production review with approval chains, automations and marker round-trips into editing apps.

Kollaborate takes time-coded comments with boxes, arrows and freehand drawing, and approvals can require several approvers in a chain that triggers actions when a file passes. Markers travel to and from Premiere, Avid, DaVinci Resolve and Final Cut. Plans are flat per plan: Basic is $7 a month for one person, and team plans start at $25 a month for 5 members. There is a 15-day trial and no free plan.