Open Source Analytics Platform
Most analytics is a quiet trade: you get charts, and a third party gets a copy of everywhere your visitors go, which is why a cookie banner now greets people before they've read a word. The open source platforms here measure traffic and product use without shipping that behavior off to an outside network, so the record of who visited and what they did lives in a database you own - light enough to skip the consent banner and yours to keep under GDPR rather than a vendor's.
Netdata
Sees every metric every second, then uses per-metric ML to flag what looks abnormal
Elasticsearch
Distributed RESTful search and analytics engine with vector search and near real-time indexing
Grafana
Open-source platform for monitoring and observability with dashboards, alerting, and mixed data sources
Apache Superset
Web-based business intelligence and data exploration platform with charts, dashboards, and SQL editing
ClickHouse
Open-source column-oriented OLAP database for real-time analytical reports with SQL
Metabase
Open source analytics for asking questions, building dashboards, and embedding BI
TiDB
Open-source distributed SQL database with ACID transactions, HTAP, MySQL compatibility, and vector search
DuckDB
In-process SQL OLAP database for analytical queries with CLI, language clients, and direct CSV and Parquet reads
Umami
Privacy-focused web analytics with self-hosting and a cookie-free alternative to Google Analytics