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sysdraw
What it is
sysdraw is a browser-based editor for system design and architecture diagrams, built around an infinite canvas. Users can describe a system in plain language to create an editable diagram, then refine it through chat or prompts on a canvas selection. Diagram options include flowchart, sequence, class, ER, and state diagrams, with a BPMN 2.0 palette. A searchable icon library covers services, queues, databases, caches, and gateways; connectors snap to anchors and route around obstacles. Mermaid import supports eight types, including gantt, pie, and gitGraph. Collaboration includes live cursors, selections, comment threads, mentions, and email invitations with view, comment, or edit roles. Users can share view-only links or embed diagrams in Notion, blogs, and READMEs. Local-first auto-save works offline without signup; signing in enables cross-device sync. The Free plan costs nothing and includes 10 scenes, five AI generations per month, and PNG export. Pro costs $6 a month; Ultra costs $20 a month. Export options include PNG, SVG, PDF, and JSON, with availability varying by tier.
For and against
For
- Local-first auto-save works offline without signup.
- Plain-language prompts create editable diagrams.
- Supports eight Mermaid import types.
- Collaboration includes comments and role-based invitations.
- Free plan includes PNG export.
Against
- Free plan is limited to 10 scenes.
- Free plan includes five AI generations monthly.
- Export availability varies by tier.
- Service has no uptime or error-free guarantee.
The verdict
sysdraw combines diagram creation, Mermaid import, collaboration, and sharing in a browser editor. The free plan is limited, and the service advises exporting important work because availability is not guaranteed.
Who it suits
It suits engineers and other system designers who want to create architecture diagrams in a browser. Its collaboration and embedding tools may also suit teams sharing diagrams for review or reference.
Plans and prices
Free
10 scenes · 5 AI generations/mo · PNG export
Read 30 Sep 2026 · sysdraw.app
Pro
500 scenes · 300 AI generations/mo · watermark-free exports · PDF & SVG export
Read 30 Sep 2026 · sysdraw.app
Ultra
Unlimited scenes · 2000 AI generations/mo · traffic simulator · voice rooms
Read 30 Sep 2026 · sysdraw.app
On the record
- AI diagramming
- Users can describe a system in plain English and receive an editable diagram that they can refine in chat or by prompting changes to a canvas selection.sysdraw.app · read 30 Sep 2026
- Audience
- The homepage describes Sysdraw as built for engineers who draw systems and everyday system designers.sysdraw.app · read 30 Sep 2026
- Billing and refunds
- The terms state that Paddle processes payments and that new subscriptions and upgrades have a 14-day money-back guarantee.sysdraw.app · read 30 Sep 2026
- Collaboration
- The canvas supports live cursors, selections, comment threads, @mentions, and email invitations with view, comment, or edit roles.sysdraw.app · read 30 Sep 2026
- Data ownership
- The terms state that users retain ownership of the diagrams and other content they create or upload.sysdraw.app · read 30 Sep 2026
- Diagram modes
- The site lists flowchart, sequence, class, ER, and state diagrams, plus a BPMN 2.0 palette.sysdraw.app · read 30 Sep 2026
- Exports
- The site lists PNG, SVG, PDF, and JSON exports, with plan availability varying by tier.sysdraw.app · read 30 Sep 2026
- Integrations
- The site specifically describes embedding diagrams in Notion, blogs, and READMEs, and importing Mermaid diagrams on Pro.sysdraw.app · read 30 Sep 2026
- Mermaid
- Sysdraw imports Mermaid diagrams in eight listed types: flowchart, sequence, class, state, ER, gantt, pie, and gitGraph.sysdraw.app · read 30 Sep 2026
- Offline and accounts
- Local-first auto-save works offline without signup; signing in enables cross-device sync.sysdraw.app · read 30 Sep 2026
- Purpose
- Sysdraw is a browser-based editor for system design and architecture diagrams, with an infinite canvas.sysdraw.app · read 30 Sep 2026
- Security and availability
- The terms say the service is provided as is, without an uptime or error-free guarantee, and advise users to back up important work by exporting it.sysdraw.app · read 30 Sep 2026
- Sharing and embeds
- Users can publish view-only links and embed live diagrams in Notion, blogs, or READMEs using an iframe.sysdraw.app · read 30 Sep 2026
- System design tools
- The editor includes a searchable icon library for services, queues, databases, caches, and gateways, along with connectors that snap to anchors and route around obstacles.sysdraw.app · read 30 Sep 2026
