For a standard B-1/B-2 visitor visa in 2026, you generally do not need a formal "sponsor" to visit the United States. Under U.S. immigration law, every applicant must qualify for a visa based on their own merits, specifically their "strong ties" to their home country (such as a job, property, or family) that ensure they will return after their trip. While a friend or relative in the U.S. can provide an "Invitation Letter" or an "Affidavit of Support" (Form I-134) to show they will cover your costs, the U.S. Department of State explicitly notes that these documents are not required and often carry very little weight in the final decision. The consular officer is primarily interested in your ability to fund your own travel and your intent to depart. However, if you are applying for certain specialized visas or if you lack personal funds and a relative is paying for the trip, their financial documents serve as evidence of "means of support" rather than a legal sponsorship. Always focus on proving your own residence and stable employment abroad rather than relying on a U.S. contact to "guarantee" your entry.