seodata.dev

keyword

the big 4

Monthly search volume and cost-per-click data for "the big 4" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=the+big+4&country=us" +--------------+------------------+ | volume | 6,600 | | cpc | $10.17 | | competition | 0.04 | | country | US | | updated | 2026-06-08 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
big 4 14,800 $8.75 20/20
big four 14,800 $11.97 19/20
big 4 companies 14,800 $11.61 18/20
big 4 accounting firms 14,800 $9.84 15/20
big 4 audit firms 14,800 $7.87 15/20
the big 4 accounting firms 8,100 $5.61 15/20
what are the big 4 5,400 $15.22 18/20
what are big 4 companies 5,400 $16.75 17/20
the big four 3,600 $3.53 20/20
the big 4 companies 3,600 $0 17/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=the+big+4&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt