Can I open-source Sleek?
KINDA · partial or early alternativesKinda. Penpot and GIMP cover the core of Sleek, but they're early or partial — expect gaps like clicking an element to change it instead of re-prompting the whole file and a tuned multi-step pipeline · you get one prompt on one model, and you close the gap in your own iteration time.
Nobody pays for one screen, and that is the honest read on this category: the single-screen version got free the day coding agents got good. What is left is thinner than it looks. There is no network here, no proprietary dataset, no integration treadmill, and the Figma converter that used to be the hard part is MIT on npm. What is left is real work all the same. The prompt below is one call to one model; the product is a chain of them, each step routed to whichever model is the right trade of quality against speed for that step, with the prompts behind each layer rewritten over months of iteration. None of that shows up on screen one. It shows up on screen nine, and in how many re-prompts it took to get there. The other thing money buys is a canvas, where a change is a click instead of a whole file re-prompted. Neither is a moat, and the prompt below is the honest test of what they are worth to you.
xclicking an element to change it instead of re-prompting the whole file
xa tuned multi-step pipeline · you get one prompt on one model, and you close the gap in your own iteration time
xsketch input · photograph a hand-drawn screen and get it back as a design
xshare links, project history, and team seats
These projects already replace it, free.
PPenpotOpen-source design and prototyping platform using open web standards (SVG/CSS), with design tokens and dev handoffopen source↗KKritaDigital painting studio loved by illustrators — brushes, animation, PSD support.open source↗GGIMPThe veteran free image editor — layers, masks, plugins; runs on every desktop OS.open source↗What each one is, in full: Penpot · Krita · GIMP
no votes, no pay-to-list · just what's real
Sleek pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0/workspace | $0/workspace | 1 project and one-time credits for about 1 design; limited exports; credits do not renew. |
| starter | $24.99/workspace | $20/workspace | 3,000 credits/month, about 100 screens, and 5 projects. |
| pro | $49.99/workspace | $30/workspace | 20,000 credits/month, about 650 screens, and unlimited projects. |
| team | — | $40/user | 30,000 credits/seat/month, about 1,000 screens per seat, and unlimited projects. |
free tier1 project and one-time trial credits for about 1 design; credits never reset.
billingStarter/Pro monthly + annual; Team annual price published; refunds only within 24 hours
hidden costsA generation uses about 30 credits and edits use 5–30. Pro and Team can buy 5,000 non-expiring credits for $15; Starter cannot buy extra credits.
verified 2026-08-11 · source ↗
Is Sleek free?
The free plan is one project on one-time trial credits; nothing renews. Paid is Starter at $24.99/mo (checked 2026-08-07).
Can I open-source Sleek?
Kinda. Penpot covers the core of Sleek, but there are real gaps: clicking an element to change it instead of re-prompting the whole file, a tuned multi-step pipeline · you get one prompt on one model, and you close the gap in your own iteration time. Read the honest list above before committing.
How much does Sleek cost?
Sleek costs about $24.99/month (Starter, checked 2026-08-07), which is $299.88 per year.
What do I lose by replacing Sleek?
Honestly: clicking an element to change it instead of re-prompting the whole file; a tuned multi-step pipeline · you get one prompt on one model, and you close the gap in your own iteration time; sketch input · photograph a hand-drawn screen and get it back as a design; share links, project history, and team seats. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Sleek?
Yes: Penpot (Open-source design and prototyping platform using open web standards (SVG/CSS), with design tokens and dev handoff) Krita (Digital painting studio loved by illustrators — brushes, animation, PSD support.) GIMP (The veteran free image editor — layers, masks, plugins; runs on every desktop OS.)