There isn’t really a concrete answer given how the question is framed. Asking for “best for X” implies a guaranteed outcome from pushing a press release, and that’s not really how PR distribution works. Using press release agency X doesn’t guarantee outcome Y.
Results are mixed and highly dependent on the actual newsworthiness of the press release. A more useful question is *what types of business events genuinely benefit from a press release* (for example, grand openings, acquisitions, funding rounds, major product launches, regulatory milestones, ect.), rather than which platform is “best” for a specific ranking outcome. We rarely propose press releases unless there is a relevent reason to do so.
Especially since most press release links, even when done properly, are nofollow and often have limited relevance for topical or page-level authority. Even when everything is executed correctly, there may be little to no measurable SEO impact.