Best Free Keyword Research Tools (2026)
| Tool | Best for | Standout feature | Free plan | Access / Notes |
|---|---|---|---|---|
| Google Keyword Planner | Researching paid keywords / PPC planning | Forecasting & budget planning; pulls suggestions from your site | Completely free (works without buying Ads) | Web (part of Google Ads). Strong for PPC; less focused on organic metrics. |
| Semrush | Advanced SEO professionals | Granular keyword data, SERP features, competitive gap analysis, SEO Content Template & Copilot AI | Generous free tier: up to 10 Analytics reports/day and 10 tracked keywords | Web; wide toolset for scaling teams. Paid plans start at higher price points. |
| KWFinder (Mangools) | Ad-hoc keyword lookup & opportunistic research | Keyword Opportunities metric, intent/type of top-ranking pages | 5 searches/day on free plan | Web (part of Mangools suite). Good for quick, detailed lookups. |
| Ubersuggest | Content marketers & idea generation | Rich Content Ideas and recommended comparison keywords | 3 searches/day on free plan (each search returns extensive data) | Web. Includes backlink data, rank tracking, and an AI writer tool on paid tiers. |
