Attending the presentation of the new web edition were some of the bloggers who will contribute to it, along with former Spanish Prime Minister Felipe Gonzalez and governing Popular Party official Esteban Gonzalez Pons, as well as other politicians and personalities.
Also on hand was the co-founder of the Huffington Post, Arianna Huffington, who said that the idea is not only to cover current news and problems but "also to put the focus on the solutions, on what works".
The Spanish version of HuffPo will get started with a team of eight journalists and 60 bloggers, among whom will be Justice Minister Alberto Ruiz-Gallardon, Socialist party leader Alfredo Perez Rubacalba, chef Sergi Arola and filmmaker Alex de la Iglesia.
The Spanish-language Huffington Post has 50 percent participation by PRISA Noticias, the publisher of Spanish daily El Pais.
At the ceremony, PRISA chief Juan Luis Cebrian said that he is studying the idea of launching local editions in Latin America once it becomes clear "how this experience is developing".
He said that new media outlet "includes Spain in the global conversation" being engaged in by the online media.