# WebSequenceDiagrams review (2026): is the free plan enough?

> Text-to-diagram sequence diagram maker with its own layout engine

Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA.

WebSequenceDiagrams draws sequence diagrams from a short text syntax, using a proprietary layout engine the vendor says runs without Java or Graphviz. It offers a VS Code extension, an MCP connection for AI assistants, HAR file conversion and an Enterprise Server edition for private networks.

- **Category:** Whiteboards & Mind Maps
- **Made by:** Hanov Solutions Inc.
- **Website:** https://www.websequencediagrams.com
- **Runs on:** Web
- **Who should skip it:** Skip it if you want freeform whiteboarding: it draws sequence diagrams only.
- **Facts last checked:** Nov 13, 2026

## Pricing

As of Nov 13, 2026, WebSequenceDiagrams has a free plan, and paid plans start at $10 per month, billed annually ($15 billed monthly).

- **Pricing model:** Free plan
- **Free plan:** WSD Basic: save your work, wider diagrams, revision history and PDF and SVG export.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| 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. |

Read from https://www.websequencediagrams.com/ on Nov 13, 2026. Prices change, so confirm with WebSequenceDiagrams before buying.

## Ways to pay less

- **Save 33% with annual billing** (Annual discount): 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. Source: https://www.websequencediagrams.com/

## Key features

- **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.

## Good for

- Architects drawing sequence diagrams with many actors
- Teams that need a self-hosted diagram renderer behind a firewall
- Developers who prefer to write diagrams from inside VS Code

## Worth knowing

- 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.

## ToolGPA grades

**GPA: 2.4 out of 4**, graded Nov 13, 2026. WebSequenceDiagrams makes sequence diagrams from text, with a VS Code extension and AI access through MCP. Free saves your work, but wider diagrams, branding removal and PDF or SVG export need Pro at $10 a month, and it draws nothing but sequence diagrams.

- **Value for money: C.** WSD 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: B.** WSD 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: C.** Does 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: C.** No store rating on record. You learn a text syntax before the first diagram.
- **Platforms and integrations: B.** Web, with a VS Code extension and AI access via Claude and GitHub Copilot. No phone app.

These are ToolGPA's own grades. Graded from this listing, whose facts were read from WebSequenceDiagrams's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews.

## Where it stands among whiteboard and mind map tools

- WebSequenceDiagrams's GPA of 2.4 is higher than 43 of the 98 other whiteboard and mind map tools we grade, and level with 14.
- It stands best on free plan and trial (B, above 71 of 98) and worst on features (C, above 0).
- Its paid plans start at $10 a month, against a middle price of $8 for the category: 49 of the 69 others that charge start lower.
- On features, ease of use and platforms it scores 2.3 out of 4. 22 tools score higher and cost less.

The category's chart of price against score: https://toolgpa.com/charts/whiteboards

## Keep it, or make your own?

**Keep it.** Nothing WebSequenceDiagrams does is plain enough to make in a weekend. The 3 things listed below take a company. It costs $120 a year.

- You could not: A diagram editor.
- You could not: It plugs into other products, VS Code, Claude and GitHub Copilot among them, and has an API.
- You could not: AI features, unless you pay a model provider for each request yourself.

A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it.

## Works with

VS Code, Claude, GitHub Copilot

**Tags:** Diagrams, AI features, Self-hostable, Public API

## Alternatives

- [SequenceDiagram.org](https://toolgpa.com/tools/sequencediagram-org): Text-based UML sequence diagrams you can also drag and drop. [Compare](https://toolgpa.com/compare/sequencediagram-org-vs-websequencediagrams)
- [Swimlanes.io](https://toolgpa.com/tools/swimlanes-io): Free text-driven sequence diagram maker that updates live. [Compare](https://toolgpa.com/compare/swimlanes-io-vs-websequencediagrams)
- [PlantUML](https://toolgpa.com/tools/plantuml): Draw UML and other diagrams from plain-text descriptions. [Compare](https://toolgpa.com/compare/plantuml-vs-websequencediagrams)
- [Mermaid](https://toolgpa.com/tools/mermaid): Text-based diagramming platform with AI and a visual editor. [Compare](https://toolgpa.com/compare/mermaid-vs-websequencediagrams)
- [nomnoml](https://toolgpa.com/tools/nomnoml): Text-to-UML diagram editor with a live preview. [Compare](https://toolgpa.com/compare/nomnoml-vs-websequencediagrams)

## Sources

The prices, plans, platforms and features above were read from these pages on Nov 13, 2026:

- https://www.websequencediagrams.com/

Page: https://toolgpa.com/tools/websequencediagrams
Listed by ToolGPA (toolgpa.com).