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Open-Source Balsamiq Alternatives (2027): Free Tools for Sketchy, Low-Fidelity Wireframes and Mockups

Open-Source Balsamiq Alternatives: Free Tools for Sketchy, Low-Fidelity Wireframes and Mockups

Balsamiq is loved for one thing: its wireframes look deliberately rough, so people discuss the idea, the flow and the content instead of colours and fonts. You drag ready-made UI controls onto a board, link screens into a clickable prototype and invite teammates or clients to comment. The catch for a founder on a tight budget is that Balsamiq is closed source and has no free plan, only a free trial. This guide looks for open-source tools that replace exactly that job: a sketchy, hand-drawn look, a library of UI components, quick low-fidelity mockups and a way for your team to review them. We checked every tool on its official website and GitHub on 5 November 2026: licence, latest release and what the free version really includes. The closed-source tools from the earlier version of this list are gone, and a short section explains why.
Quick answer: for the closest match to Balsamiq's hand-drawn look, use Excalidraw with a wireframing library, or Pencil Project with its Sketchy GUI stencils if you want an offline desktop app like Balsamiq for Desktop. Use draw.io if you want UI mockup shapes plus a one-click sketch style in a free tool with no sign-up, Penpot when you need comments, components and real prototypes for a team, and Quant-UX when you want to test a clickable mockup with real users.
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What Balsamiq Offers in 2027 and What It Costs

To know what you are replacing: Balsamiq describes its wireframes as intentionally low-fi. You drag controls from the component library or describe a screen to Balsamiq AI, turn selected screens into a clickable prototype, collect comments and reactions on the board and export to PNG, PDF or HTML. Boards can be embedded in Jira, Confluence or Notion, and the Balsamiq MCP server lets AI coding tools such as Claude, Codex or Cursor read your boards. There is also Balsamiq for Desktop for offline work.
The Balsamiq pricing page (default view, billed annually, US dollars, checked 5 November 2026) lists three plans, all priced per editor: Starter at $16 a month ($192 a year) for up to 10 projects, Teams at $24 a month ($288 a year) for up to 100 projects, and Enterprise at $35 a month ($420 a year) for up to 400 projects, SAML single sign-on and data storage in the US or EU. Every plan includes unlimited reviewers who can view and comment for free, custom reusable UI components and monthly AI credits. There is no free plan: you get a 14-day free trial without a credit card. Registered nonprofits get 50% off the first year of an annual Starter or Teams plan, and Balsamiq says it has no education discount.

Open-Source Balsamiq Alternatives Compared

ToolClosest Balsamiq featureLicenceRuns inFree versionLatest activity
ExcalidrawHand-drawn look for every shapeMITBrowser, works offline; self-hostFull editor, 1 scene, unlimited collaboratorsCode updated Nov 2026
Pencil ProjectOffline desktop app with UI stencils, incl. Sketchy GUIGPL-2.0Windows, macOS, LinuxEverything, no account4.0.0, Oct 2026
draw.ioMockup shapes plus a sketch styleApache-2.0Browser and desktop appEverything, no sign-up32.6.10, Nov 2026
PenpotComponents, comments and prototypes for teamsMPL-2.0Browser, cloud or self-hostedCloud plan $0, up to 8 team members2.18.6, Nov 2026
Quant-UXClickable mockups tested with usersGPL-3.0Browser, cloud or DockerUnlimited prototypes and testsCode updated Nov 2026
WireflowScreen templates linked into user flowsMITBrowser, no accountEverything, free foreverCode updated Oct 2026
PlantUML SaltWireframes written as textGPL, LGPL, Apache, EPL or MITLocal Java or online serverEverythingNew builds Nov 2026
Sources: each project's official website, pricing page, licence file and GitHub releases, checked 5 November 2026. Self-hosting is free, but you pay for the server and your own time.

The Best Open-Source Balsamiq Alternatives in 2027

1. Excalidraw: the closest match to Balsamiq's sketchy look

Excalidraw draws every rectangle, arrow and label as if by hand, which is the main reason people pick Balsamiq in the first place. On its own it is a whiteboard, not a wireframing tool, but its free public libraries fill the gap: community kits such as the Lo-Fi Wireframing Kit, Web Kit, Basic UX/wireframing elements and HTML input elements give you buttons, inputs, checkboxes and placeholders to drag onto the canvas, much like Balsamiq's controls. The Excalidraw code is MIT-licensed and was still being updated in November 2026. On the Excalidraw+ pricing page, the free version includes the full editor, one infinite scene, unlimited collaborators, 10 AI requests a day and end-to-end encryption in your browser. Comments, unlimited scenes and cloud saving come with the paid Plus plan, which has a 14-day free trial. What you give up compared with Balsamiq: there are no clickable prototypes, and the free app saves to your browser, so save files regularly.

2. Pencil Project: an offline desktop mockup app with Sketchy GUI stencils

Pencil Project is the open-source tool that feels most like Balsamiq for Desktop: a free GUI prototyping app for Windows, macOS and Linux that works without an account or an internet connection. Its source code is GPL-2.0 and ships with stencil collections for desktop and web UI, Android, iOS and flowcharts, plus a Sketchy GUI collection of hand-drawn-style widgets. On the Stencils and Templates page you can add a Generic Wireframe kit of low-fidelity placeholders, shadcn/ui and Material kits, and annotation markers for design reviews. Link elements to other pages and export to HTML, and you get a clickable mockup; PNG, PDF and SVG exports are there too. Pencil looked abandoned after version 3.1.1 on 1 January 2023, but version 4.0.0 came out on 23 October 2026 with a built-in MCP server, so AI assistants such as Claude Desktop, Cursor or VS Code can create and arrange mockups on your canvas. There is no shared online workspace: you review by sending files or exports.

3. draw.io: UI mockup shapes and a one-click sketch style

draw.io (diagrams.net) is free, needs no sign-up and has Apache 2.0 source code. Two features make it a real Balsamiq alternative. First, its UI libraries: draw.io's guide to drawing interface mockups lists shape libraries for Android, Atlassian, Bootstrap, iOS and generic mockups. Second, its rough sketch style: tick Sketch in the format panel and shapes, connectors and labels get rough outlines, hand-drawn shading and handwritten text, for one element or the whole diagram, with a subtler Comic option. You keep the file on your own computer or in your own cloud storage, and draw.io also runs inside Confluence and Jira, like Balsamiq's add-ons. The desktop app works fully offline; version 32.6.10 came out on 4 November 2026. Page links make simple click-throughs possible, but it is not a prototyping tool.
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4. Penpot: components, comments and prototypes for a team

Penpot is an open-source design platform under the Mozilla Public License 2.0. It does not look hand-drawn, but it covers the team side of Balsamiq better than any other tool here: shared libraries and components, interactive prototypes and comments. In view mode reviewers can leave comments on boards, and a shared link can allow comments from people outside your team. The Penpot libraries and templates page lists free wireframing kits, such as the Minimalistic Wireframing Kit by Laura Kalbag, that you import and reuse. On the Penpot pricing page (cloud, US dollars), the Professional plan costs $0 and is fully featured, with up to 8 team members, unlimited viewers and 10 GB of storage; Unlimited costs $7 per editor per month, capped at $175 a month, and you can also self-host Penpot for free. Version 2.18.6 came out on 4 November 2026.

5. Quant-UX: clickable mockups you can test with users

Quant-UX picks up where Balsamiq prototypes stop: you build screens from ready UI widgets, link them into a clickable prototype and send it to testers, and Quant-UX records the sessions and shows analytics. Its pricing page says the hosted version is free and open source, with unlimited prototypes, unlimited user tests, real-time collaboration, analytics and questionnaires. The code is GPL-3.0 and was updated in November 2026; self-hosting runs with Docker. Mockups look clean rather than sketchy, so use it after the first rough round.

6. Wireflow: screen templates linked into user flows

Wireflow is a free, online and MIT-licensed tool for user flows: you drag wireframe screens from 125 templates in 12 categories, such as sign-in, checkout and mobile, onto a canvas and connect them with labelled arrows. It needs no account, autosaves in your browser, works offline once loaded and exports PNG or JPG images, and an optional AI assistant builds flows with your own Anthropic API key. It covers Balsamiq's flow diagrams, not detailed screens, and the code was updated in October 2026.

7. PlantUML Salt: Balsamiq-style mockups written as text

Salt is the PlantUML subproject for GUI and website wireframes. You type a few lines, buttons in square brackets, text fields in quotes, tabs and trees in simple markup, and PlantUML draws a plain low-fidelity screen. Because the mockup is text, it lives in your Git repository or wiki next to the spec, and teammates review it like code. The PlantUML README says you can choose between the GPL, LGPL, Apache, Eclipse Public and MIT licences, and new builds came out in November 2026. It suits technical founders; designers will prefer a visual tool.
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Balsamiq Alternatives That Are Abandoned, Changed or Not Open Source

The 2025 version of this article listed ten tools, but most of them are closed source. We removed them, and checked a few open-source names that often appear on Balsamiq lists:
  • Figma, Wireframe.cc, Miro, MockFlow, Moqups, Whimsical and Vectr: closed-source products, some with free plans, so they do not belong on an open-source list. For hosted tools, see our Whimsical alternatives and free Lucidchart alternatives.
  • tldraw: the tldraw.com whiteboard is free to use, but the tldraw SDK is published under its own tldraw licence, which requires a licence for production use, so it is not open source.
  • Akira: its README still says it is in early development and not ready for production, and its last release dates from August 2021. Use Penpot instead.
  • mydraft.cc: a small MIT-licensed browser wireframer whose last tagged release is from October 2024, although its code was still updated in October 2026. Fine for a quick test, too small to replace Balsamiq for a team.
  • Inkscape and LibreOffice Draw: open source (LibreOffice is MPL-2.0), but general drawing apps with no UI component library, so wireframes take far longer than in Balsamiq. See our open-source Inkscape alternatives if you need vector graphics.

Which Open-Source Balsamiq Alternative Should You Choose?

  • You want the same rough, hand-drawn look: Excalidraw with a wireframing library, or draw.io with the sketch style switched on.
  • You used Balsamiq for Desktop and want an offline app: Pencil Project.
  • You mostly needed the UI control library: Pencil Project or draw.io's mockup shapes.
  • Your team and clients review and comment on mockups: Penpot.
  • You want to test clickable mockups with real users: Quant-UX.
  • You map flows between screens more than single screens: Wireflow.
  • Your specs live in Git or Markdown: PlantUML Salt.
For a wider list of open-source wireframing tools, framed around Wireframe.cc, read our guide to open-source wireframe tools. If your mockups are ready to become polished UI, compare the open-source Figma alternatives; for whiteboard sessions with your team, see the open-source Miro alternatives and open-source FigJam alternatives.

How Founders Use Open-Source Balsamiq Alternatives

The Balsamiq habit is worth keeping even without Balsamiq: draw the product in boxes before anyone writes code. Sketch the three or four screens that matter, the landing page, sign-up, the one action your product exists for and the result, and keep them rough on purpose, so testers and co-founders comment on the idea instead of the colours. Show the sketches to five potential customers and ask what they would click and what they expect to happen next. When the flow holds up, link the screens in Pencil, Penpot or Quant-UX and test a clickable version.
Then validate your startup idea with real customers and build your MVP in a weekend with AI; many AI coding tools now take a wireframe as input, see our comparison of AI prototyping tools. For hand-drawn sketches on a tablet, try the open-source sketching apps, and when your product is live, write its help pages with the F/MS AI SEO Tool so people find it in Google and AI assistants.

FAQ About Open-Source Balsamiq Alternatives

What is the best free open-source alternative to Balsamiq?

For the same sketchy look, Excalidraw (MIT) with a wireframing library. For an offline desktop app with ready UI stencils, including hand-drawn Sketchy GUI widgets, Pencil Project (GPL-2.0). For team comments and prototypes, Penpot (MPL-2.0).

Is Balsamiq free?

No. Balsamiq has no free plan, only a 14-day free trial without a credit card. When we checked in November 2026, paid plans started at $16 per editor per month billed annually, and reviewers who only view or comment were free.

Is Balsamiq open source?

No. Balsamiq is a closed-source commercial product. Every tool on our main list publishes its source code under an open-source licence, such as MIT, Apache 2.0, MPL-2.0 or the GPL.

Which open-source tool has a hand-drawn look like Balsamiq?

Excalidraw draws everything in a hand-drawn style by default. draw.io has a Sketch option that gives shapes rough outlines and handwritten labels, and Pencil Project ships a Sketchy GUI stencil collection.

Is there an offline alternative to Balsamiq for Desktop?

Yes. Pencil Project and the draw.io desktop app work fully offline on Windows, macOS and Linux, and Excalidraw works offline in the browser once loaded.

Can I make clickable prototypes without Balsamiq?

Yes. Penpot and Quant-UX build interactive prototypes, and Quant-UX also records user tests. Pencil Project turns links between pages into a clickable HTML export.

Which tool lets clients comment on wireframes for free?

Penpot. Its free cloud plan allows up to 8 team members and unlimited viewers, and a shared link can allow comments from people outside your team. In Excalidraw, comments need the paid Plus plan.

Is Pencil Project still maintained?

Yes. After version 3.1.1 in January 2023 it was quiet for almost four years, but version 4.0.0 came out on 23 October 2026 with a built-in MCP server for AI assistants.

Is tldraw a free open-source Balsamiq alternative?

tldraw.com is free to use, but the tldraw SDK has its own licence that requires a licence for production use, so it is not open source.

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You can publish a guest post in one of the Fe/male Switch startup blogs, which rank in Google and in AI tools. Get a quality backlink.

About the Author

Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. Throughout her startup experience she has applied for multiple startup grants at the EU level, in the Netherlands and Malta, and her startups received quite a few of those. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
2026-11-05 20:38 Top Alternatives