Yes, taking a night train in Europe in 2026 is considered very safe and is currently seeing a massive "renaissance" due to its low carbon footprint. Modern services like the Nightjet (OBB) and European Sleeper feature private, lockable compartments that offer a high level of security for solo travelers and families. While standard "couchette" cars involve sharing a room with strangers, there is a strong "community" atmosphere and theft is statistically rare; however, you should always keep your valuables in a small bag under your pillow. Train staff are present throughout the night to check tickets and monitor the cars. For the highest level of safety and privacy, booking a "Sleeper Cabin" with an en-suite bathroom is the gold standard. As with any public transit, standard precautions apply: be mindful of your surroundings at major transit hubs like Berlin or Vienna late at night. Overall, the convenience of waking up in a new city—combined with the rigorous safety standards of European rail operators—makes the night train one of the most practical ways to traverse the continent.