10 Best Market Sizing Tools for Founders [2026 Updated]

1. Statista

• Type: Paid
• URL: https://www.statista.com
• Overview: Statista offers a vast, searchable collection of market data, industry reports, and statistical charts covering thousands of markets and countries. It provides ready-made market size figures, forecasts, and visualizations that teams can use for TAM/SAM/SOM estimates and presentations.

2. IBISWorld

• Type: Paid
• URL: https://www.ibisworld.com
• Overview: IBISWorld delivers industry market research reports with detailed market size, industry revenue, growth drivers, and segmentation for hundreds of industries by country. Their reports include historic data, forecasts, and risk analysis useful for precise market sizing and competitive benchmarking.

3. Euromonitor International

• Type: Paid
• URL: https://www.euromonitor.com
• Overview: Euromonitor provides global market intelligence with deep country- and category-level market sizing, consumer trends, and company share data across thousands of categories. Their Passport platform enables custom market sizing, trend analysis, and comparative country market opportunity assessments.

4. NielsenIQ

• Type: Paid
• URL: https://www.nielseniq.com
• Overview: NielsenIQ supplies point-of-sale, retail measurement, and consumer panel data to calculate market sizes, category shares, and purchase behaviors at granular geographic and channel levels. Their data is widely used for FMCG and retail market sizing, forecasting, and SKU-level opportunity analysis.

5. Gartner

• Type: Paid
• URL: https://www.gartner.com
• Overview: Gartner produces research reports, market forecasts, and TAM estimates for technology and B2B markets, combining primary research and vendor/solution-level demand models. Their market guides and Magic Quadrants help size addressable markets and prioritize segments for enterprise tech and services.

6. Similarweb

• Type: Paid
• URL: https://www.similarweb.com
• Overview: Similarweb estimates website and app audience sizes, market share, and category traffic across digital channels to infer market demand and competitive presence online. Marketers use its audience and traffic estimates to size digital market segments, benchmark competitors, and calculate online TAM proxies.

7. Semrush

• Type: Paid
• URL: https://www.semrush.com
• Overview: Semrush offers market analysis and traffic estimation tools (Market Explorer, Traffic Analytics) that quantify online market demand, key players’ share, and keyword-level volume to approximate market size and growth. Its combined SEO, paid search, and competitive data support sizing digital segments and forecasting addressable search demand.

8. PitchBook

• Type: Paid
• URL: https://www.pitchbook.com
• Overview: PitchBook provides comprehensive private market data, deal flow, and company metrics used to estimate the size and value of venture-backed and private market segments. Investors and founders use its datasets to size emerging industry opportunities, benchmark valuations, and model total addressable markets in fintech, healthtech, and more.

9. Crunchbase

• Type: Paid
• URL: https://www.crunchbase.com
• Overview: Crunchbase aggregates company, funding, and industry activity data that help infer market expansion, competitor counts, and investor interest to support market sizing for startups and adjacent segments. Its company counts, funding trends, and category filters are useful for triangulating SAM and SOM estimates in fast-moving sectors.

[b]10. Google Market Finder (Think with Google)</b>

• Type: Free
• URL: https://marketfinder.thinkwithgoogle.com
• Overview: Google Market Finder helps businesses identify country-level demand, search interest, and estimated audience size for products and categories using Google data and country indicators. It’s a free, practical starting point for sizing export markets, understanding search-driven demand, and prioritizing geographic expansion.