Boldin wins for the most robust DIY modeling — real tax modeling and Monte Carlo simulations that let you stress-test a retirement plan across thousands of possible market outcomes, at $144 a year. ProjectionLab wins for privacy-conscious investors who want the same kind of deep scenario modeling without linking any actual financial accounts, running entirely on numbers you enter yourself. Grace AI wins for a completely different interaction model: you call a phone number and talk through your retirement plan conversationally, and it remembers your situation across calls the way a human advisor would, without an account login or dashboard at all. All three exist because retirement planning has too many interacting variables (savings rate, market returns, healthcare costs, when to claim Social Security) for a simple calculator — the difference is whether you want to model it yourself, model it privately, or talk it through out loud.
Where each one actually wins
Boldin (formerly NewRetirement) builds a full financial plan with genuine tax modeling and Monte Carlo simulation, letting you see not just one projected outcome but a range of possibilities based on market variability. It's the most feature-complete DIY option for someone willing to input real account data and dig into the modeling themselves.
ProjectionLab offers comparably deep simulation capability without requiring you to link any financial accounts at all — you enter your numbers manually, which matters for anyone uncomfortable connecting bank and investment logins to a third-party planning tool. It's the stronger choice when privacy is a genuine priority, not just a preference.
Grace AI flips the interaction model entirely: you call a real phone number, and a conversational AI walks through your retirement plan with you, remembering context from previous calls and checking your plan across nine distinct retirement planning areas. For anyone who finds a dashboard and spreadsheet-style planning tool intimidating or just prefers talking through decisions out loud, this is a genuinely different approach.
Quick comparison
| Tool | Core approach | Starting price | Best fit |
|---|---|---|---|
| Boldin | Linked accounts, tax modeling, Monte Carlo | $144/yr | Full-featured DIY modeling |
| ProjectionLab | Manual entry, no linked accounts | $129/yr | Privacy-conscious deep scenario planning |
| Grace AI | Phone-based conversational planning | Custom | Preferring to talk through a plan, not click through one |
Which one should you actually use?
Start with ProjectionLab if you want serious modeling but aren't comfortable linking your actual accounts to a third-party tool. Move to Boldin if you want the most complete DIY feature set and don't mind connecting real account data for more automated tracking. Use Grace AI if a phone conversation genuinely works better for you than a dashboard, regardless of feature depth.
FAQ
Can any of these tools actually replace a human financial advisor? Not fully — the honest approach most advisors and users land on is AI for daily support, education, and preparation, then bringing that clarity into an actual conversation with a human advisor for anything with real stakes, like when to claim Social Security or how to structure a large withdrawal.
Is it safe to link my real bank and investment accounts to a tool like Boldin? These tools use read-only bank-grade connections similar to other financial apps, but if you're not comfortable with that regardless of the security model, ProjectionLab's manual-entry approach avoids the question entirely.
How accurate are Monte Carlo simulations for predicting whether my retirement plan will actually work? They're a probability estimate based on historical market variability, not a prediction — a plan showing an 85% success rate across simulated scenarios means it held up in most modeled outcomes, not that it's guaranteed, and real markets can still behave in ways the simulation didn't capture.
Does Grace AI's phone-based format actually cover the same depth as a dashboard tool? It checks your plan across nine specific retirement areas conversationally, which covers similar ground to a dashboard review, but you lose the visual scenario-comparison charts that Boldin and ProjectionLab both offer — the tradeoff is format, not necessarily depth.
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*Ratings and pricing reviewed monthly. Last updated September 2026.*
Bogdex · Founder & editor, woska
Bogdex builds and curates woska, testing AI tools against real workflows to judge which ones actually save time rather than which have the longest feature list.