New Retirement stands out as one of the most comprehensive DIY retirement planning platforms available. Their PlannerPlus tool offers sophisticated modeling capabilities typically found only in expensive financial advisor software, including Social Security optimization, tax planning scenarios, and Monte Carlo simulations. The free tier provides genuine value, while the premium subscription unlocks detailed what-if analyses and estate planning features. The interface strikes a good balance between depth and usability, though the learning curve can be steep for beginners. Their educational content and active community forums add significant value. While it can't fully replace personalized financial advice for complex situations, New Retirement empowers users to take control of their retirement planning with professional-grade tools at a fraction of traditional advisory costs.