set.seed(1)

dens.1 <- density(runif(1000,0,100))
dens.2 <- density(runif(1000,100,10000))

df.1 <- data.frame(x=dens.1$x,y=dens.1$y)
df.2 <- data.frame(x=dens.2$x,y=dens.2$y)

library(plotly)

pl.1 <- plot_ly(x=~df.1$x,y=~df.1$y,type='scatter',mode='lines',line=list(color="#A9A9A9")) %>%
  layout(xaxis=list(title="Count",zeroline=F),yaxis=list(title="Density",zeroline=F)) %>%
  layout(title="Data1")

pl.2 <- plot_ly(x=~df.2$x,y=~df.2$y,type='scatter',mode='lines',line=list(color="#A9A9A9")) %>%
  layout(xaxis=list(title="Count",zeroline=F),yaxis=list(title="Density",zeroline=F)) %>%
  layout(title="Data2")

subplot(list(pl.1,pl.2),nrows=1,shareX=F,shareY=F,titleX=T,titleY=T) %>% layout(showlegend=F)