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No. 57of 92 ·Business Intelligence Tools

Blazer

Web · Self-hosted

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Freedom report

One barScore 5.7

Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Blazer is ranked #57 of 92 in business intelligence tools on Freedom251. It runs on Self-hosted, Web.

Compared on business intelligence tools

Deployment: self-hosted

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The record

Purpose: Blazer lets teams explore data with SQL, create charts and dashboards, and share them with their team.
Installation: Blazer is installed as a Ruby gem in a Rails application and mounted as a dashboard route.
Charts: Blazer automatically generates charts from SQL result columns, including line, column, scatter, and pie charts.
Dashboards: Dashboards combine multiple queries and display each query as a chart or table.
Checks and alerts: Checks can identify bad data and send email notifications when a check starts failing or passes again.
Data sources: Blazer supports multiple data sources, including PostgreSQL, MySQL, Amazon Redshift, BigQuery, Snowflake, and SQL Server.
Security: The documentation recommends protecting the dashboard with authentication and using read-only database users.
Query auditing: Blazer tracks all queries.
Notable limits: Cohort analysis requires PostgreSQL or MySQL 8, and CSV uploads require PostgreSQL.
Integrations: Blazer can send check notifications to Slack through an incoming webhook.
Hosting: Blazer is available as a Docker image and can be installed in a Rails application.
Intended users: Blazer is presented for teams that want to explore data with SQL and share charts and dashboards.

Where it ranks on Freedom251

Best Business Intelligence Tools in 2026#57 of 92

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Sources

github.com/ankane/blazer· checked 5 Oct 2026