FlexJobs presents a Pro plan that has added attributes like e-mail marketing placement, monthly data reporting, and custom account assistance for $399/mo.
Search Remotely sends your job listing to about 50,000 qualified candidates for you, so you do not have to spend time browsing for candidates or sifting through profiles.
Glassdoor has numerous options like job posting, advertisement, and recruiting platforms.
Some of these new search engines mostly index conventional job boards.