Saas marketing help

We have a saas made for small and mid size companies. It is basically an HR solution wherein you can track employees, track projects, track their attendance (with geo referencing) and many more cool features

Need advice on how to market it ! Which is the best channel to get more leads.

.Was thinking of giving a free trial for founders to see if they need something like this to boost thier teams productivity

Please need advice on marketing and finding customers . Tried linkedin outreach hasn’t worked out