There is also https://carta.com/ https://carta.com/ which eventually thrives to become a private market: https://techcrunch.com/2019/05/06/carta-was-just-valued

There is also https://carta.com/ https://carta.com/ which eventually thrives to become a private market: https://techcrunch.com/2019/05/06/carta-was-just-valued-at-1-7-billion-by-andreessen-horowitz-in-a-deal-some-see-as-rich/ https://techcrunch.com/2019/05/06/carta-was-just-valued-at-1....