To be clear the comparaison is unfair. Hulu is serving the much larger US domestic market and might become global as the rest of the Disney+ offering possibly and compete against CBS-Viacom‘s Pluto. Whereas Salto the joint venture between all major French private and public broadcasters is and will only serve the French market.
2019 has been a year of major consolidation in the US amongst media companies and with operators. The Disney / Fox and the ATT / Warner Media acquisitions have reshaped the industry.