Hello Firends,

Anyone can suggest me the best alternative of Google Keyword Planner.

yword Tool
Mergewords. This tool allows you to enter a collection of keywords in three columns. ...
WordStream. ...
SEMrush. ...
SEOBook. ...
Keyword Eye. ...
Bing Keyword Research. ..

SEMrush and WordStream are good alternatives for Google keyword planner.

There are also two to three free tools available you can try them.
KWfinder
Ubersuggest
Quora
Reddit

There are some alternative keyword tools for keyword planner like ahrefs, ubersuggest, keywords everywhere, and search engine.

For me its SEMRush. Not just for keyword analysis, but for site auditing as well.

Apart from Google Keyword Planner, SEO Service Providers use the following tools -

Wordtracker
Google Trends
Ubersuggest
SEO Book
WordStream
Keyword tool-io
BuzzSumo
InstaKeywords

Keyword.io

WordStream. ...
SEMrush. ...
SEOBook. ...
Keyword Eye. ...
Bing Keyword Research. ...
KeywordSpy. ...
Thesaurus.com.

Merge words. This tool allows you to enter a collection of keywords in three columns. ...
WordStream. ...
SEMrush. ...
SEOBook. ...
Keyword Eye. ...
Bing Keyword Research. ...
KeywordSpy. ...
Thesaurus.com.

Semrush and keyword tool-io

There are also two to three free tools available that you can try.
KWFinder
Ubersoggest
Quora
Reddit