Keyword Tool vs Yoast SEO
Keyword Tool
keywordtool.ioYoast SEO
yoast.comSide by side
| Figure | Keyword Tool | Yoast SEO |
|---|---|---|
| Price from | $68/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 6 | 5 |
| Spec score · SEO tools | 8.6 (#23) | 9.3 (#3) |
| API access | Yes | Yes |
| Free plan | Yes | Yes |
| Keyword research | Yes | Yes |
Plans
Keyword Tool
- Starter$68 a month
- Growth$148 a month
- Scale$308 a month
- Agency$628 a month
- FreeFree
- Enterprise & CustomPriced on request
Yoast SEO
- Yoast SEOFree
- Yoast SEO Premium$118.80 a year
- Yoast SEO FreeFree
- Yoast SEO Google Docs Add-on$5 a month
- Yoast SEO for Shopify$19 a month
In their own words
Keyword Tool
Keyword Tool generates long-tail keyword suggestions from autocomplete when given a seed term. It supports keyword and competitor research across 16 platforms, including Google, YouTube, Bing, Amazon, TikTok, Reddit, Pinterest and Google Trends. The free tool works without an account and can return 750+ Google autocomplete keywords. Paid plans add search volume, cost per click, competition scores, device breakdown and historical trends; they also support search-volume enrichment for up to 1,000 keywords per request, with daily capacity depending on the plan. Access includes the web interface, API and MCP, and Claude, Cursor and ChatGPT are named as compatible assistants. Google coverage includes 190+ countries, 68,000+ locations and 50+ languages. The site says Google and Bing metrics come from planner ecosystems, while volumes for other platforms are modeled estimates based on clickstream signals. Web, API and MCP share a daily request pool, and available MCP tools can vary by endpoint, plan and rollout status. Paid plans start at $68 a month. There is no free trial; the pricing FAQ lists a 30-day money-back guarantee for paid plans.