The Spaniard has been linked with a number of teams, including Mercedes, Red Bull, and Sauber (who will become the Audi works team from 2026).
Sainz is yet to commit to any admirer yet, and revealed ahead of the Miami Grand Prix that he and his representatives are still in conversations around the paddock.
New 'possibility' for Sainz emerges with family links
With Sainz still to make his decision, teams up and down the grid are competing for his signature.
Now, Alpine has emerged as a potential suitor, according to F1 journalist Joe Saward.
“The driver market remains stuck because Mercedes and Red Bull do not want to make decisions about Carlos Sainz, preferring to wait and watching how things develop," he wrote in his blog.
“Sainz has been talking to pretty much everyone. Audi is keen but it isn’t a great choice for Carlos.
“Alpine is also a possibility. [Carlos] Sainz Sr worked with the Alpine boss Bruno Famin with the Peugeot Dakar team, with much success.
“The Enstone team is supported by a big manufacturer in Renault, but there is much work to be done."