Head-to-Head Comparisons
Detailed one-on-one comparisons between Portfolio Lab and the tools people weigh it against. Each covers pricing, optimization methods, data sources, and the cases where the other tool is the better choice.
The short version
Most portfolio tools optimize on historical returns. That is a defensible choice for backtesting and a poor one for forward planning: a mean-variance optimizer fed the last fifteen years will load up on whatever happened to win over those fifteen years. Portfolio Lab optimizes on published forward-looking capital market assumptions instead, and lets you compare five providers’ estimates rather than trusting one.
Where the alternatives win: Portfolio Visualizer has far deeper historical backtesting and factor analysis. Portfolio Charts is better for building intuition about how allocations behave over decades. If those are what you need, use those.