Useful data is everywhere. It is also scattered across websites, APIs, archives, spreadsheets, and PDFs. Turning it into a reliable dataset still takes research, engineering, and ongoing maintenance.
We started Mostly Right because every new question became another data engineering project. Finding the right sources was only the start. The data still had to be cleaned, joined, checked, documented, and rebuilt whenever a source changed.
Mostly Right brings the whole job into one place. You can start with a dataset built by the community. If it does not exist, describe what you need. Agents find the sources and configure our ingest engine to build it.
We run the dataset on our infrastructure, check each new version, and keep the last working version live when a source breaks. Every dataset can be downloaded as Parquet or queried as JSON through one API.
Community datasets are free to use. The $29 monthly plan includes unlimited dataset builds, organizations, and team management. A team can research sources, review how a dataset is built, and use the same current version together.
Mostly Right is built by Vu Hoang Anh, Robert Tarabcak, and Vojtech Havlicek, working between Prague and New York.
The Mostly Right team
