PayJoin adoption

PayJoin is a privacy improvement for bitcoin. In the case where a customer pays a merchant, they both together co-operate to create a single bitcoin transaction which mixes both their coins and masks the payment amount.

Transaction surveillance companies heavily depend on the common input ownershipassumption which is broken by PayJoin transactions. So if those transactions became even a little bit widespread they could massively decrease the reliability of blockchain surveillance. Merchants and customers who adopt PayJoin would find their privacy improved from anyone analyzing the blockchain, for example a surveillance company spy would find it much harder to figure out which addresses and transactions belonged to a particular merchant that was using PayJoin, or who else transacted to them.

PayJoin transactions are indistinguishable from regular bitcoin transactions by design, so it's very hard to get an accurate number for how common they are.

The PayJoin protocol standard most likely to get adoption is BIP 0078.

No
??	Maybe / Haven't checked / placeholder
Planned	The developers said they plan to
Non-BIP78	Implements a form of PayJoin but not BIP78
PR Merged	In the case of software, code has been written and merged, and it will be in next release.
Yes	Feature has been released

Software Wallets

Name	Sending	Receiving	Notes
Wasabi Wallet	Yes	No	https://docs.wasabiwallet.io/using-wasabi/PayJoin.html
JoinMarket	Yes	Yes	https://old.reddit.com/r/Bitcoin/comments/idhrak/new_release_of_joinmarket_070_includes_bip78/
Bluewallet	Yes	??	https://old.reddit.com/r/Bitcoin/comments/j6qswf/bluewallet_releases_payjoin_bip78/
Sparrow Wallet	Yes	??	https://github.com/sparrowwallet/sparrow/releases/tag/0.9.7
Samourai Wallet	Non-BIP78	Non-BIP78	https://samouraiwallet.com/stowaway
Bitcoin Core	No	No
Bitcoin Knots	No	No
Electrum	No	No
bcoin	No	No
Armory	No	No
GreenAddress	No	No
Breadwallet	No	No
Coinomi	No	No
BTC.com	No	No
Casa	No	No
Mycelium	No	No
Bitcoin Wallet for Android	No	No
Trust Wallet	No	No
Guarda Wallet	No	No

Hardware Wallets

Name	Sending	Receiving	Notes
Coldcard	Yes	No	Hardware can sign bip78 payjoins and also http://ckbunker.com/

Payment processors

Name	Receive	Notes
BTCPay	Yes	First implementer of BIP78 payjoin for merchants.

Exchanges

P2P exchanges make the most sense as early adoptors of PayJoin. All exchanges are welcome on this list of course.

Name	Send to exchange	Receive from exchange	Notes
AgoraDesk	No	No
Bisq	No	No
Hodl Hodl	No	No
LocalBitcoins	No	No
LocalCoinSwap	No	No
LocalCryptos	No	No
Paxful.com	No	No
Sideshift.ai	Yes	No	For "To send" choose "Bitcoin PayJoin"

Non-profits

Name	Receive	URL	Notes
Human Rights Foundation	Yes	https://hrf.org/donate-bitcoin/payjoin/
Waxwing's personal donation page	Yes	https://joinmarket.me/donations/

Casinos

Bitcoin casinos are very natural early-adopters of PayJoin. An early protocol specification for it, called bustapay, was created by the owner of a bitcoin casino.

Name	Send to	Receive	Notes
Bustabit	No	No

Stores

// TODO