Tessera Viz
PX-02
Licensing
The engine is free. We charge for what sits on top.
The foundation is Apache-2.0 — engine, all three renderers, every framework binding, the admin UI, the headless renderer and the map tiles. Each paid tier is a strict superset of the one below, so starting free never costs you anything later.
KeyLines and ReGraph run $25,000 to $50,000 per seat per year. yFiles starts north of $30,000. Tessera Viz gives the engine away under Apache-2.0 and charges for what sits on top — per developer, not per person who looks at a chart.
Community
Apache-2.0
$0
forever
The whole engine, not a crippled demo. Commercial use permitted, no key, no sign-in, no expiry.
26 algorithms with playback
77 chart renderers
All 14 layouts and 7 themes
WebGL to 500k nodes
Every framework adapter
Headless SVG and PNG from Node
Map tiles and the admin UI
Studio
Most teams
$29
per developer / month
or $290 a year
For a team shipping a product on it — the AI surface, the debugging tools and somebody who answers.
Everything in Community
LLM and MCP integration
Chrome DevTools extension
Collaborative editing
Priority issue triage
Unlimited end users
Enterprise
One number
$9,900
per year
unlimited developers
One line item for the whole engineering organisation, with the domain packs and the paperwork a review will ask for.
Everything in Studio
Finance and network/security packs
Ed25519-signed licensing
CycloneDX SBOM and licence review
Unlimited developers
Named support channel
Regulated
Banks
$39,000+
per year
For institutions that need the fraud engine and someone contractually on the hook for it.
Everything in Enterprise
Six-detector fraud engine
Custom dashboards
Dedicated support with an SLA
On-premises and air-gapped builds
Prices in USD, excluding local tax. Each tier is a strict superset of the one below, so starting on Community never costs you anything later. The core stays Apache-2.0 — that is a licence, not a trial that runs out.
Talk about a licence ↗
Questions we actually get.
What is actually free?
The engine and everything under it: all three renderers, 26 algorithms with playback, all 14 layouts, seven themes, every framework adapter, the nine plugins, the admin UI, the headless renderer, map tiles and all 77 chart renderers. Apache-2.0, commercial use permitted, no key and no expiry.
How does it compare to KeyLines on price?
KeyLines and ReGraph run roughly $25,000 to $50,000 per seat per year and yFiles starts north of $30,000. Tessera Viz charges per developer rather than per seat, and the engine itself is free.
Do end users need licences?
No. Studio is priced per developer with unlimited end users, and Enterprise is one number for the whole engineering organisation.
Can it export GraphML?
No — import only. The formats package ships parsers for Mermaid, DOT, GraphML and JSON, and writers for SVG, PNG, JSON, vector and paginated PDF, and PowerPoint. We would rather say that plainly than let you find out after buying.
Is it accessibility certified?
There is a complete, audit-ready WCAG 2.1 AA self-assessment, and third-party certification has deliberately not been done yet. We are not going to claim a certificate we do not hold.