Top Open Source Data Visualization Tools in 2026
A curated collection of the 11 best free and open-source Data Visualization tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
draw.io
Free open-source diagramming tool for teams
Stars7,753Last commit15d agoLicenseApache-2.0drawDB
Visual database schema editor and SQL generator
Stars39,286Last commit13d agoLicenseAGPL-3.0Apache Superset
Open-source data visualization and exploration platform
Stars74,482Last commit10d agoLicenseApache-2.0
Metabase
Open source AI analytics with verified queries
Stars48,960Last commit10d agoLicenseOpen SourceMermaid
Open-source diagramming and charting tool
Stars89,963Last commit12d agoLicenseMIT
Lightdash
Open-source, code-first BI platform for modern data teams
Stars6,094Last commit10d agoLicenseOpen SourceGrafana
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.
Stars76,446Last commit10d agoLicenseAGPL-3.0Evidence
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Stars6,884Last commit11d agoLicenseMITChartbrew
Build live KPI dashboards from databases & APIs
Stars4,047Last commit1mo agoLicenseOpen Source
Azimutt
Next-gen database explorer and analyzer
Stars2,170Last commit12d agoLicenseMITRedash
Open source data visualization and dashboarding tool
Stars28,766Last commit19d agoLicenseBSD-2-Clause
