Most people use Keyword Planner for their keyword research and hence I think it is one of the best.

My favorite keyword planner and Google ad words

You can use this tool:
1.) WordStream’s Keyword Tool is free.
2.) FreshKey, it is $20 (Paid service)
3.) Soovle is a free.
4.) Ubersuggest is a free.
5.) Search Term/Query Reports is a free service.
6.) Google Keyword Planner is a free service.
7.) Competitor Source Code is a free service.
8.) YouTube Keyword Tool is a free service.

My favorite keywords research tool is Google keywords planner tool.

If you want to go through best keyword tool and asking favirate tool then no doubt I can say that keyword planer tool is the best.

Which is the Best Keyword Research Tool? (Expert Pick) After trying out all the popular keyword research tools, we believe that SEMRush is the best keyword research tool and the #1 SEO toolkit in the market.

- Google Keyword Planner
- Neil Patel tool
- SMErush

Semrush Position Tracking Tool.
Google Trends.