Is the thrift savings plan for federal employees a 401k?

The Thrift Savings Plan (TSP) is similar to a 401(k) but is specifically designed for federal employees and members of the uniformed services. Like a 401(k), it allows participants to save for retirement through tax-deferred contributions and offers various investment options. However, the TSP has different rules, contribution limits, and features tailored to federal workers. Overall, while they share similarities, the TSP is not a 401(k) plan.