Birthright is the general label for a 10-day all-expense paid first trip to Israel. Within that umbrella, different providers organize the actual trips. Some of these providers offer options geared to orthodox/frum/glatt kosher/single-sex participants, for instance
- Ezra World (a youth movement) offers men-only/women-only/couple glatt kosher tours
- Israel Free Spirit offers a men-only observant program with extra time in Jerusalem and Tzfat and chareidi hechserim
See the broader list here.
Of course, consult your rabbi
before implementing anything you learn here and to discuss whether it would be appropriate for a specific individual.