Here are 9 sources of vegan protein (and don't forget Micros)
Most people seem to think animal protein is necessary to build muscle due to its complete amino acid profile and higher rates of bioavailability. Fortunately, all plant proteins are complete (McDougall 2002) and that the bioavailability doesn't seem to affect nitrogen balance surprisingly (Hossain et al. 2009). However, combining plant protein sources is probably best to ensure sufficient essential amino acid intake
And just for those who question the muscle building potential of plant protein,
Joy et al. (2013), compared the effects of whey and rice protein supplementation on body composition and performance. After 8 weeks they found no differences between the two groups. Another study comparing pea and whey protein found the same results after 12 weeks (Babault et al. 2015)
Finally, Song et al. (2016), carried out a study following 131,000 people and their dietary habits. They concluded that "high animal protein intake was positively associated with cardiovascular mortality and high plant protein intake was inversely associated with all-cause and cardiovascular mortality". Food for thought..