Data guides
Practical, code-first walkthroughs of the public data sources behind our datasets — where the raw data lives, what its problems are, and how to actually use it.
H-1B Salary Database: Where to Download the Real Data (and How to Use It)
Every H-1B salary site is built on the same free government files. Here's where DOL LCA disclosure data and the USCIS H-1B Employer Data Hub live, what's wrong with the raw files, and how to query them in Python and SQL.
Read guide →Government Contract Awards Data: USAspending Bulk Download, TED, and Beyond
How to bulk-download US federal contract awards from USAspending and SAM.gov, EU awards from TED, and UK/Canada/Australia portals — plus the supplier-name mess that ruins cross-portal analysis, with working Python and SQL.
Read guide →SEC Financial Statements Data: EDGAR Bulk Downloads, XBRL, Insider Trades and 13F Holdings
How to get structured financial statements, Form 4 insider trades and 13F institutional holdings out of SEC EDGAR — the official bulk files, their sharp edges, and runnable Python/SQL for each.
Read guide →Job Postings Dataset with Salaries: Free Sources, ATS Scraping, and What Clean Data Looks Like
Where to actually get a job postings dataset — Kaggle dumps, government feeds, ATS endpoints — why most have no usable salary field, and how parsed salary/seniority/tech-stack data changes what you can build.
Read guide →Finding Companies Hiring AI Engineers (or Using Salesforce): Hiring Signals as Data
Job postings are the most honest public signal of what companies are building and buying. How to turn raw postings into lead lists — companies adopting specific technologies, building AI teams, expanding into new cities — with evidence you can audit.
Read guide →IRS 990 Data Download: Nonprofit Financials, Executive Compensation and Grants from the E-File Corpus
Every US nonprofit's Form 990 is public — as millions of XML files. Where the IRS bulk data lives, why the XML is notoriously hard, and how to get financials, exec comp and grant flows into tables you can query.
Read guide →App Store Reviews Dataset: Getting Review and Ratings Data from iOS and Google Play
Where app review datasets actually come from — RSS feeds, scraping libraries, expensive intelligence platforms — and how derived complaint/sentiment metrics often beat raw review text for real product work.
Read guide →Clinical Trials Dataset in CSV: ClinicalTrials.gov Downloads, the API, and Linking to FDA Approvals
How to get all 500k+ registered clinical trials as analyzable tables — the ClinicalTrials.gov API and bulk options, EU/WHO registries, and the messy but valuable join from trials to FDA drug approvals.
Read guide →Property Sales Data: Downloading Real Estate Transaction Records from Government Sources
County and city governments publish every property sale as open data — NYC PLUTO/DOF, Philadelphia OPA, Cook County. Where the files live, the assessor-data traps, and how to build a transactions table you can actually analyze.
Read guide →POI Database Download: Points of Interest Data Without the License Headaches
The real options for points-of-interest data — OpenStreetMap, Overture, government registries, commercial vendors — and why the license (ODbL!) matters as much as the coverage. Includes working extraction code.
Read guide →Patent Dataset Download: USPTO Bulk Data, PatentsView, and the Citation Graph
How to get 9M+ US patents with citations, assignees and classifications — the free USPTO/PatentsView bulk files, what makes assignee analysis hard, and runnable code for patent analytics and ML.
Read guide →Company Database in CSV: Free Sources, Entity Resolution, and Cross-Source Company Masters
Where to get company data free — SEC EDGAR, GLEIF LEI, Companies House, state registries — why joining them is the hard part, and what an entity-resolved company master looks like in practice.
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