SequenceDiagram.org vs WebSequenceDiagrams (2026): which should you pick?
As of Nov 13, 2026, SequenceDiagram.org grades higher than WebSequenceDiagrams: 3.0 against 2.4 out of 4.0.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
SequenceDiagram.org grades higher on value for money and the free plan. They get the same grade on features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
SequenceDiagram.org
Text-based UML sequence diagrams you can also drag and drop
WebSequenceDiagrams
Text-to-diagram sequence diagram maker with its own layout engine
Which one is for you
Pick SequenceDiagram.org if
- Fits if you draw sequence diagrams and want them stored in your own Drive
- Works for people who want diagrams processed in the browser, not on a server
Look elsewhere if
- Skip it if you want a freeform whiteboard: sequence and architecture diagrams only
- Not for you if you need live co-editing, because sharing is by link or saved file
- Watch out: the code is not open source, and the paid on-prem Docker version has no published price
- Too light for team spaces: there are no accounts or shared workspaces listed
Pick WebSequenceDiagrams if
- Fits if you write sequence diagrams from text inside VS Code
- Works for a team of five or more that needs one block of Pro accounts
Look elsewhere if
- Skip it if you want freeform whiteboarding: it draws sequence diagrams only
- Tight if you stay free: wider diagrams and PDF or SVG export are Pro
- Pricey if you pay monthly: $15 against $10 billed annually
- Watch out: WSD Team is a block of 10 accounts at $699 a year, and Enterprise Server is $5,999 plus 20% yearly
How we grade them
| 3.0GPASequenceDiagram.orgVery good | 2.4GPAWebSequenceDiagramsFair | |
|---|---|---|
| Value for money | AFree to use, with a Patreon at $1 a month for donations. Nothing on the page is paid for features. | CWSD Pro is $10 a month billed annually, $15 monthly, against $8.25 in the middle for whiteboard tools. WSD Team is $699 a year for a block of 10. |
| Free plan and trial | AFree outright, with no plan, trial or sign-up needed. Work saves to the browser, a file, Google Drive or OneDrive. | BWSD Basic is free and lets you save your work and see revision history. The edge is paid: wider diagrams, PDF and SVG export and no branding. |
| Features | CSequence and architecture diagrams with export and plugins. A smaller job than a whiteboard, and the listing says it covers nothing else. | CDoes sequence diagrams fully, plus HAR file analysis and a self-hosted edition. A smaller job than a whiteboard, and branding stays on until you pay. |
| Ease of use | CNo store rating on record. You get a text syntax and a drag-and-drop view to learn. | CNo store rating on record. You learn a text syntax before the first diagram. |
| Platforms and integrations | BWeb with Google Drive, OneDrive, Confluence and IntelliJ IDEA integrations. No desktop or phone app. | BWeb, with a VS Code extension and AI access via Claude and GitHub Copilot. No phone app. |
| Best for | UML sequence diagrams from text or drag and drop | sequence diagrams written as text |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: SequenceDiagram.org and WebSequenceDiagrams. How we grade
Price against what you get
SequenceDiagram.org has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. WebSequenceDiagrams starts at $10 a month and scores 2.3.
They score the same, and SequenceDiagram.org starts $10 a month lower. Of the other whiteboard and mind map tools on the chart, none scores higher than SequenceDiagram.org for less, and 22 score higher than WebSequenceDiagrams for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- WebSequenceDiagrams is self-hostable, according to its own site.
At a glance
| SequenceDiagram.org | WebSequenceDiagrams | |
|---|---|---|
| Pricing | Free | Free plan |
| Starts at | Free | $10 per month, billed annually ($15 billed monthly) |
| Free plan | None | WSD Basic: save your work, wider diagrams, revision history and PDF and SVG export. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | NoSpareTime AB | Hanov Solutions Inc. |
| Price read from | sequencediagram.org | websequencediagrams.com |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
SequenceDiagram.org
- It covers sequence and architecture diagrams only, not freeform whiteboarding.
- The code is not available under an open-source license.
- There is no real-time multi-user editing; sharing is by link or saved file.
- The on-prem Docker version is a paid perpetual license, but its price is not published.
WebSequenceDiagrams
- It makes sequence diagrams only; it is not a freeform whiteboard.
- Branding is removed only on paid plans.
- The Team plan is sold as a block of 10 accounts, so it suits five or more users.
- Enterprise Server is quoted as a site license with 20% yearly maintenance and is sold through sales.
Key features
SequenceDiagram.org
- Text and drag-and-drop together
- A diagram is described in a text script and can also be edited by clicking and dragging on the drawing.
- Client-side processing
- All parsing, processing and drawing happens in the browser, which the site says means diagram data is not transferred over the internet.
- Saving and sharing
- Diagrams save to a file, Google Drive, OneDrive or browser storage, and a share link can be generated.
- Export
- Export as SVG with the source text embedded, or as PNG; PDF is produced by printing from the browser.
- Architecture diagrams
- Besides sequence diagrams the editor can create architecture diagrams, which need a recent Chrome, Edge, Firefox or Safari.
- Plugins and on-prem
- Plugins exist for Confluence Cloud and IntelliJ IDEA, and a Docker image is offered for internal company use.
WebSequenceDiagrams
- Text-based diagrams
- Diagrams are written as text and the engine lays out actors and messages without manual line routing.
- VS Code extension
- An official extension offers live side-by-side preview, syntax highlighting and snippets inside the editor.
- AI through MCP
- Claude, GitHub Copilot or other MCP-compatible assistants can generate diagram syntax that the engine then lays out.
- HAR file analysis
- HTTP Archive files can be converted into sequence diagrams that map cross-origin requests and API calls.
- Self-hosted edition
- The Enterprise Server edition runs on a company's own infrastructure so diagrams stay on the internal network.
Plans
SequenceDiagram.org
Web app$0
The browser editor is free to use; the site invites voluntary Patreon support from $1 a month.
WebSequenceDiagrams
WSD Basic$0
Save your work, wider diagrams, revision history and high quality PDF and SVG export.
WSD Pro$10
per month, billed annually ($120 a year; $15 billed monthly)
Removes WSD branding; adds auto-save, parallel flows, auto-numbering and multipage PDF export.
WSD Team$699
per year for a block of 10 Pro accounts
All Pro features for 10 users, with centralized billing and priority email support.
Enterprise Server Edition$5,999
site license, plus 20% annual maintenance
Hosted on your own infrastructure for air-gapped use, with unlimited internal users; sold through sales.
Ways to pay less
SequenceDiagram.org
No public discounts listed.
WebSequenceDiagrams
- Annual discount
Save 33% with annual billing
WSD Pro is $10 a month billed as $120 a year, against $15 a month on monthly billing; the pricing toggle labels the annual option as 33% off.
Common questions
Which is cheaper, SequenceDiagram.org or WebSequenceDiagrams?
As of Nov 13, 2026, SequenceDiagram.org is cheaper to start with: it is free, against $10 a month for WebSequenceDiagrams. SequenceDiagram.org is free, and WebSequenceDiagrams starts at $10 per month, billed annually ($15 billed monthly).
Which has a free plan, SequenceDiagram.org or WebSequenceDiagrams?
As of Nov 13, 2026, both SequenceDiagram.org and WebSequenceDiagrams have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.