file 04 · 47 cursors · 142 comments
File 04 / 12Open · 47 cursors

The roomwhere designerssettle it.

Mosaic anchors comments to pixels, ships components your engineers can paste, and keeps a 31-day record of every decision — so the file is always the source of truth.

Pinned threadsTokenized hand-offViewer free, always
Open a fileTour the studiofree for 3 editors
canvas47
cursors
comments142
components1.4k
decisions today
94%
resolved on file
Filed at
Northwind LabsPlover StudioFoundry 47Maison ChâteauVelour AtelierLinea StudioMercury OSKino GallerySubstrateField Notes Co.Helvetia CartographicNorthwind LabsPlover StudioFoundry 47Maison ChâteauVelour AtelierLinea StudioMercury OSKino GallerySubstrateField Notes Co.Helvetia Cartographic
/ tools on the wall

Five blocks.
One canvas.

AP
this padding is breaking on small viewports
SM
KT
file 04
Pinned threads142 active
/ library
Button12
Card19
Modal26
Tabs33
Toast40
Avatar47
Badge54
Toggle61
Pill68
Slider75
Input82
Dropdown89
284 indexed · 1.4k instances
Component library284 indexed
/ presence
47
cursors live
ABCDEFGHIJKL
Cursors47 live
/ today9 versions
  • v0.4.18Adelaida P.tightened cap-height on H112:14
  • v0.4.17Soraya M.added lockup variant11:02
  • v0.4.16Kohei T.rolled back drop shadow09:48
  • v0.4.15Adelaida P.updated token: surface-208:31
  • v0.4.14Soraya M.split nav into two slots07:14
Version historylast 9
/ ready to paste
--surface-1: #FAFAF7;
--surface-2: #FFFFFF;
--text-ink: #0A0A0A;
--accent-primary: #1B4FCB;
/* Button · primary */
background: var(--accent-primary);
color: var(--surface-1);
padding: 0 16px; height: 44px;
tokens · CSS vars · React snippet
Hand-off snippetready
/ four uses

What teams
stop fighting about.

Mosaic does four things well — the rest stays in the design tool you already love.

IDecisions on the file

Threads pinned to pixels.

Mosaic anchors every comment to a region of the canvas. Decisions land where the design lives — never in a Slack thread that scrolls past tomorrow.

measured
94%
of comments resolved on the file
threads / day
IIComponents

A library that travels.

Pull a component once, instance it everywhere, update everywhere. Mosaic's library obeys design tokens, light/dark, and your team's nine breakpoints.

measured
1,427
instances across one workspace
components
IIIVersioning

History you can roll back to.

Every save is a version. Diff two versions side by side. Roll back a single component without nuking the file. Yes, even nested overrides.

measured
31 days
of full revision history (free tier)
versions
IVHand-off

Spec sheets engineers actually read.

Mosaic emits real CSS, real tokens, and a clean React snippet that maps to the components your engineers already use. No more redlines lost in Notion.

measured
47%
less hand-off ping-pong, audited
snippets
/ honest comparison

What you stop tabbing between.

We benchmarked the same redesign cycle on Mosaic and on a typical Figma + Slack + Notion stack.

Dimension
Mosaic
Figma + Slack + Notion
Comments anchored to pixels
Native
Plugin add-on
Component variants
Unlimited
Capped at 28
Revision history (free)
31 days
30 days, branched only
Hand-off CSS / tokens
Real, with units
Approx. RGB hex
Real-time cursors
100+ presence
20 max
Per-seat pricing
$12 / editor
$15 / editor + viewer
from design teams
"Mosaic killed the meeting where we used to argue about which Slack thread was authoritative. Now the file is. Our weekly hours dropped."
Adelaida Pérez-Costa
Design Director, Mercury OS
0%
Comments resolved on the file
0%
Less hand-off ping-pong
0K
Component instances per workspace
0 days
Revision history (Sketch tier)
/ pricing

Per editor.
Viewers always free.

Stakeholder reviewers comment, react, and approve at no charge. You pay per designer composing the file.

Tier
Sketch
$0/ month
Studio
$12/ editor / month
Atelier
Customannual
Seats
Up to 3 editors · unlimited viewers
Unlimited editors · viewers free
Org-wide · enforced SSO
Files
3 files · 31-day history
Unlimited · 12-month history
Unlimited · 7-year audit
Libraries
1 library
Unlimited libraries
Per-brand · per-locale
SLA
Community
99.95% credit-backed
99.99% with named TAM
/ asked by designers

Sharp questions.
Square answers.

Mosaic is the design collaboration surface — comments, versioning, components, hand-off. We integrate with the design tool you already use (Figma, Sketch, Penpot) instead of trying to replace the canvas itself.

Yes — we shipped it after asking 200 engineers what they wished the design tool gave them. Real CSS units, design tokens you can paste into your config, a React snippet mapped to your existing components.

Yes. Stakeholder reviewers comment, react, and approve at no charge. You only pay per editor — the people composing the file.

Atelier customers can run Mosaic on a private control plane in their own VPC. The data plane is the same binary that powers the public service.

Every save is a version. Branches are layered on top — fork a file for a redesign exploration, merge back when settled. Branch diffs render side-by-side at the component level.

/ recent files

From the studio.

full log
  • 2026-04-22ComponentsSlot-based variants — drop a component into a slot, not into a frame.
  • 2026-04-09Hand-offToken export now matches Tailwind v4 and CSS variable conventions.
  • 2026-03-31CommentsRegion-pinned threads now survive file restructure (beta).
  • 2026-03-18PricingSketch tier doubled to 3 editors. Same friendly $0.
File 12 · ready to fork

Open a file.
Settle it.

today
47
files open
live
1.4k
cursors
resolved
94%