nostr:npub1v4wgen0qrtt56exx0mpjdfswsrelmgax0h486e53xxet45ftk8ts2jwc0x It's hard to claim that they were 100% statelss and 100% capitalist, but these historical societies were pretty close to ancap ideals like having private courts and security or order based on contract law.
http://www.ozarkia.net/bill/anarchism/faq.html#part17
https://peacerequiresanarchy.wordpress.com/2012/12/30/stateless-societies-ancient-ireland/
http://www.mises.org/journals/jls/3_1/3_1_2.pdf
https://mises.org/power-market/republic-cospaia-anarchist-renaissance-city