Metabase
Self-hostable business intelligence: questions, dashboards, alerts and embeds on the SQL databases you already own.
Business Intelligence
Free self-hostedOpen source · AGPL-3.0
Also offers paid editions — see the detail.
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Self-hosted alternatives to Power BI
Entries in our catalogue that can take over from Power BI. Each one states why, and links the vendor's own source for the claim.
Why it can replace Power BI: Vendor comparison page contrasts Metabase with Power BI on licensing and semantic modelling. Source