Lunacy

Free UI design app from Icons8 for Windows, Mac and Linux that opens Sketch files.

Verified facts: 3 of 3
Alternatives ranked: 5
Approved reviews: 0
Visits sent from here: 0

About Lunacy

Lunacy is a free graphic and UI design app made by Icons8, the company known for its icon and illustration libraries. It works much like Sketch or Figma, with artboards, components, shared libraries, auto layout, styles, prototyping and real-time collaboration through cloud documents, but it runs as a native desktop app on Windows, macOS and Linux. It can open and save .sketch files and work on local documents offline, which makes it one of the few ways to edit Sketch files on Windows or Linux. Icons8's icons, photos and illustrations are built in and free to use with attribution; a paid subscription removes that requirement. The app itself is free with no ads or locked features. Its community, plugin ecosystem and third-party integrations are much smaller than Figma's, and teams that rely on dev handoff tools may find gaps.

Best for: Designers on Windows or Linux who want a free Sketch-compatible UI design app.

What works

Free with no locked features
Native app on Windows, Mac and Linux
Opens Sketch files and works offline

Why people leave

Small plugin and community ecosystem
Built-in graphics need attribution unless you pay
Fewer handoff and integration options than Figma

Top Lunacy alternatives

See all 5

1
Figma
Market-leading collaborative UI design with a huge plugin ecosystem.
68.8
2
Sketch
The Mac app whose file format Lunacy supports.
64.8
3
Penpot
Open-source, browser-based and self-hostable UI design.
61.8
4
Uizard
AI-assisted wireframes and mockups for non-designers.
57.2
5
Affinity
Free professional vector and layout tools on Mac and Windows.
44.8

Why people left Lunacy

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Lunacy: common questions

Is Lunacy free?

Lunacy has a free plan and paid plans.

Is Lunacy open source?

No, Lunacy is not open source. Open-source alternatives include Penpot.

What platforms does Lunacy run on?

Lunacy is available for Windows, macOS and Linux.

What are the best alternatives to Lunacy?

The highest-ranked Lunacy alternatives right now are Figma, Sketch and Penpot. See the full ranked list for pricing, platforms and verified facts.

See all 5 Lunacy alternatives

Lunacy facts

3 of 3 verified

Price: Free, no locked features; Checked Oct 25, 2026lunacy.docs.icons8.com(opens source in a new tab); “Lunacy is absolutely free: there’s no hidden charges, ads, or locked features.”
Offline mode: Yes, for local .sketch files; Checked Oct 25, 2026lunacy.docs.icons8.com(opens source in a new tab); “You can work on local .sketch documents on your computer without an internet connection.”
Built-in graphics: Free with link to Icons8; Checked Oct 25, 2026lunacy.docs.icons8.com(opens source in a new tab); “Our built-in graphics (icons, photos, and illustrations) are also free for use in personal and commercial projects, as long you include a link to Icons8.”