Can I get inline blame (like GitLens) on Webstorm?

Install plugin GitToolBox. It has the same functionality as VisualCode's GitLens.

File > Settings > Plugins > Marketplace

In Webstorm, you can get all the blames for a file with the option:

VCS > Git > Annotate

Inline blame exact to Gitlens is most probably not available as of now for Webstorm.

UPDATED: corrected name to "GitToolBox" from "Jetbrains Toolbox"

This can be achieved through the GitToolBox plugin, it provides the exact same functionality as git lens, finally I found it! This can be toggled from other settings> git toolbox global or git toolbox project (if you only want to configure per project) See screenshot

Install plugin GitToolBox for inline blame like GitLens.