The best free alternative to Redash is Grafana, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Redash and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Redash are Metabase (Freemium, Open Source), Microsoft Power BI (Freemium), Google Data Studio (Free) and PopSQL (Freemium).
Power BI for Office 365 is a self-service business intelligence (BI) solution delivered through Excel and Office 365 that provides information workers with data analysis and visualization capabilities to identify deeper business insights about their data.
Cube.js is an analytics layer for modern applications. It supplies building blocks to add analytics features into any application you create. Cube.js is designed to work with large-scale data sets and implements various optimization techniques.
Ananas Analytics Desktop is a hackable data tool that helps your team combining non-technical and technical users to collaborate and build data analytics faster. Connect data from anywhere. Transform, analyze, and visualize to build analytics in minutes.