Tishby has been an activist advocating for Israel since at least 2011. In 2014, she founded Reality Israel, which holds a series of "leadership trips" for Jewish and non-Jewish people in Israel. In 2016 and 2018, she spoke before the
United Nations General Assembly in New York City in support of Israel. In April 2022, Tishby was appointed by then-Prime Minister
Yair Lapid as Special Envoy for Combating Antisemitism and the Delegitimization of Israel, the first person to serve in the newly created position. Her appointment to the position initially drew skepticism. She also registered as a
foreign agent under the
Foreign Agents Registration Act (FARA). In April 2023, she was dismissed from the position after she spoke out against the
judicial reform proposed by the
new government of re-elected Prime Minister
Benjamin Netanyahu.
Act for Israel In 2011, Tishby founded Act for Israel, an online Zionist advocacy organization. Tishby created the group with a stated goal of correcting misinformation about Israel's history, culture, and governmental policies. In March 2011, Act for Israel arranged seven interviews of an
Israel Defense Forces (IDF) delegation with American blogs and radio shows, including
RedState. She has advocated for the return of
hostages taken by
Hamas, and criticized "so-called
pro-Palestinian movements" in the United States. In an October 2025 interview with the
National Post, she stated that Israel had lost its
public relations war. On November 29, 2025, Tishby was assaulted during a pro-Palestinian demonstration in Paris. The footage she shared on her social media outlets shows a protester grabbing a phone belonging to a person with her and throwing it to the ground. Over the course of the rally, she reported being verbally abused, pursued by protesters, and subjected to explicit insults and hostile slogans directed at her and at Israel. On October 22, 2025, Tishby was featured as a speaker at the convocation ceremony at
Liberty University. In 2025,
The Jerusalem Post included Tishby on their list of "50 Most Influential Jews", ranked 45th in a group entry of "seven
pro-Israel influencers" that also included Gal Gadot (Israeli actress and model),
Arsen Ostrovsky (Israeli lawyer),
Siggy Flicker (
The Real Housewives of New Jersey),
Hen Mazzig (social media influencer),
Hillel Neuer (Executive director of
UN Watch), and (social media strategist). In January 2026, Tishby appeared as a guest on the
PBS program
Firing Line with Margaret Hoover.
Eighteen Tishby founded the nonprofit media organization Eighteen in 2024, of which she is the CEO, describing its mission as being "to empower Jews and allies to be proud advocates of Israel, the Jewish community and Western values. Its mission is to fight antisemitism, defend Israel and inspire Jewish pride." In December 2024, Eighteen began producing a video project of menorah lightings where Tishby appeared alongside a different celebrity figure for each night of
Hanukkah, with the series from December 2024-January 2025 featuring
Gwyneth Paltrow,
Mila Kunis,
Mayim Bialik,
Iliza Shlesinger,
Van Jones,
Cindy Crawford,
Tiffany Haddish, and
Gal Gadot. In 2025, Eighteen launched the Voices of October 7 speaking tour, which was hosted at six campuses in the United States. == Books ==