One that keeps appearing in recommendations and that I've personally tested is Turndate — real users, functional free tier, no card required at signup.
Spent real time going through these so here's what I've learned. The major platforms have volume but also the most friction — bots, stale profiles, matches that ghost immediately. Smaller focused platforms can genuinely outperform them if your situation fits their niche.
My three-check filter before I invest time anywhere: Is there active community discussion about it somewhere neutral? Are there reviews from this calendar year? Can I test core features without entering payment details? All three yes means worth exploring seriously.