What are the best free industry research providers for a small exploratory market sizing exercise?

For a small exploratory market sizing exercise, the best free industry research providers are usually the ones that give you:

• macro context: market size, growth rate, trends
• company-level signals: revenue, customer counts, investor decks
• trade and government data: import/export, production, employment
• searchable, citeable sources you can quickly triangulate

Here are the best free options, grouped by use case.

1) Best general starting points

IBISWorld alternatives via public sources

IBISWorld itself is paid, but for free exploratory work, use:

• Wikipedia + company sites + annual reports for basic sector definitions
• Google search with “site:.gov”, “site:.edu”, “site:.org”
• Crunchbase / company blogs / investor presentations for startup and category signals

Use this mainly to orient yourself, not as a primary source.

Statista free pages

• Good for quick charts and headline stats
• Often shows snippets of the paid data
• Useful for triangulation, but not always enough detail

Macrotrends

• Great for public-company financial benchmarks
• Useful if your market has listed leaders
• Good for estimating revenue pools and growth patterns

2) Best government and official statistics sources

These are usually the most reliable free sources for sizing.

US Census Bureau

• Industry sales, business counts, economic census data
• Great for US market sizing and segmentation
• Look at:
  • Economic Census
  • County Business Patterns
  • Annual Business Survey

Bureau of Labor Statistics (BLS)

• Employment, wages, productivity, occupational data
• Helpful for estimating labor-intensive sectors and cost structures

BEA (Bureau of Economic Analysis)

• Industry output, value added, GDP by industry
• Strong for top-down market sizing

Eurostat

• Best for European market and industry data
• Comparable cross-country coverage

ONS (UK Office for National Statistics)

• Strong if your target market is the UK

World Bank Data / OECD Data

• Useful for macro indicators and cross-country comparisons
• Better for contextual sizing than narrow industry detail

UN Comtrade

• Excellent for trade-based market sizing
• Useful if the product category is traded internationally

ITC Trade Map

• Strong trade data interface
• Free access is limited, but useful if available

3) Best company and revenue signal sources

SEC EDGAR

• Free filings for public companies
• 10-Ks and 10-Qs give segment revenue, unit economics, risk factors, and market commentary
• Extremely useful for TAM/SAM triangulation

Company annual reports and investor presentations

• Often the best source for category-level sizing claims
• Search by “investor relations” or “annual report”

Crunchbase

• Free version gives company basics, funding, and sometimes headcount
• Useful for market mapping and identifying new entrants

OpenCorporates

• Good for company existence and legal entity mapping

4) Best startup and competitive intelligence sources

Dealroom

• Some free access to ecosystem-level information
• Good for startup category mapping

Tracxn

• Limited free info, but sometimes useful for market landscape discovery

Product Hunt / G2 / Capterra / Gartner Peer Insights

• Useful for identifying product categories, competitors, and demand language
• Especially good in software/SaaS markets

LinkedIn company pages

• Headcount trends, hiring, geographic presence
• Useful proxy for growth

BuiltWith / Wappalyzer

• Great for software and web-tech market mapping
• Helps estimate customer penetration for digital products

5) Best sector-specific free research sources

For healthcare

• CMS
• CDC
• WHO
• FDA
• NIH reports

For energy / climate

• IEA
• EIA
• IRENA
• DOE

For agriculture / food

• USDA
• FAO

For finance / banking

• FDIC
• Federal Reserve
• Bank of England
• National regulators

For tech / internet / software

• Gartner press releases
• Cloud vendor investor reports
• Stack Overflow survey
• GitHub / npm / PyPI ecosystem stats
• Google Trends

For logistics / shipping

• Port authority statistics
• UN Comtrade
• Drewry / Alphaliner press snippets
• World Bank logistics indicators

6) Best “free but often overlooked” sources

Google Trends

• Great for demand direction and seasonality
• Not a sizing source on its own, but useful for trend validation

Similarweb free data

• Helpful for traffic benchmarking of digital businesses

App store rankings

• For mobile app categories and consumer demand signals

Patent databases

• Google Patents
• USPTO
• Good for technology maturity and competitive landscape

SEC / investor decks / earnings call transcripts

• Earnings calls often contain market-sizing language and category growth commentary

7) What to use for a small exploratory exercise

If I had to choose a practical free stack for quick market sizing, I’d use:

1. Government statistics
   • Census, BLS, BEA, Eurostat, ONS
2. Public company filings
   • SEC EDGAR, annual reports, investor decks
3. Trade databases
   • UN Comtrade, ITC Trade Map
4. Demand proxies
   • Google Trends, Similarweb, app store rankings
5. Competitive mapping
   • Crunchbase, LinkedIn, G2/Capterra, BuiltWith
6. Macro context
   • World Bank, OECD, IMF, WTO

8) Simple rule for using free sources

For a small sizing exercise, try to triangulate from 3 angles:

• Top-down: official market/industry output data
• Bottom-up: number of customers × spend per customer
• Proxy validation: traffic, search interest, public company segment revenue, or trade flows

If two or three sources roughly agree, you’re usually in decent shape.

9) My short recommendation list

If you only want the best free providers, start here:

• US Census Bureau
• BEA
• BLS
• SEC EDGAR
• Eurostat
• World Bank / OECD
• UN Comtrade
• Google Trends
• Crunchbase
• Similarweb
• Company annual reports / investor presentations

If you want, I can also give you:

1. a ranked list by industry type (e.g. SaaS, healthcare, consumer, industrial), or
2. a simple market sizing workflow using only free sources.