有semrush的免费版本吗？
不，semrush不't have a free version. you can however try serpstat , an alternative to semrush, that offers a free plan of most of the things semrush does. other tools that are perfect free semrush alternatives can be found here.
订阅基于自动续订。您将每月/年收取费用，直到您禁用它。如果您这样做，您的帐户将保持升级至当前预付期结束。