Compare
Open relationship vs Relationship anarchy
An open relationship keeps a central couple and opens it to outside sex; relationship anarchy rejects the idea of a central couple — and of ranking relationships — altogether.
An open relationship starts from a couple and opens a door: the central pair remains the structure, and outside connections (usually sexual) are permitted under agreed terms. The couple is the unit, and the openness is a feature added to it. Relationship anarchy starts from a completely different premise — that there's no reason a romantic-sexual pair should be the default centre of someone's relational life at all.
Under relationship anarchy, each connection is its own negotiation, and none automatically outranks another. There's no 'primary couple' that other relationships orbit, and no built-in assumption that a romantic partner matters more than a close friend or a platonic life partner. Where an open relationship preserves the couple and adds freedom around it, RA dissolves the couple as the organising unit.
This makes them feel similar on the surface (both involve more than one connection) but philosophically distant. An open relationship is a modification of the couple form; relationship anarchy is a rejection of the couple form as the default. Someone leaving a long monogamous relationship might open up first and only later discover RA describes what they actually believe.
Point-by-point
| Open relationship | Relationship anarchy | |
|---|---|---|
| The central couple | Preserved; it's the core unit. | Rejected as a default. |
| Ranking | Central pair outranks outside connections. | No relationship outranks another by default. |
| Romantic vs platonic | Romantic pair is the anchor. | Platonic bonds can be just as central. |
| What changes from monogamy | Adds outside sex to a closed couple. | Discards the couple template entirely. |
| Governing logic | Couple-plus-agreements. | Each bond negotiated on its own terms. |
Bottom line
An open relationship keeps the couple and opens it; relationship anarchy gives up the couple as the centre. If you want your partnership to stay central with added freedom, open; if you reject ranking relationships at all, RA.