How we ranked this list
Feeld is first: it's built around non-monogamy as the default — identity, pronouns, sexuality and relationship structure are first-class profile fields, paired-account support is structural, and the audience is narrow but coherent. 3Fun is second: a larger free tier (messaging isn't paywalled) and real scale in the threesome and swinging niche, but a 2019 Pen Test Partners study found it exposed users' location, photos and chat data and we can't confirm the fix — so we grade its safety well below Feeld and say so plainly. Mainstream apps with a non-monogamy checkbox aren't in this list.
- 1This list ranks only open-minded-by-design products we have tested on real accounts, in score order. We will not pad it with mainstream apps that happen to support non-monogamous or paired-account use cases.
- 2Score, audience and value grades come from each underlying review and update when those reviews update.
- 33Fun's safety grade reflects the documented 2019 Pen Test Partners finding, treated as a past finding with remediation we have not independently verified — honest, not alarmist.
Read the full scoring methodology →