How ZBee compares
Last reviewed: September 2026
Most people planning retirement try more than one tool and cross-check — which is exactly the right instinct. So here's an honest read of where ZBee fits against the tools you're most likely weighing, including where they do more than ZBee. If precision and trusting the math matter to you, a comparison that only flattered itself wouldn't be worth much.
The one-line version: ZBee is the only one of these that keeps your data on your own Mac and connects to your real accounts, in a native app built around one question — the most you can safely spend. The cloud tools generally do more tax optimization; ZBee does more to keep your financial life off of anyone's servers.
Weighing one tool in particular? Each matchup has its own deeper read: ZBee vs Boldin · ZBee vs ProjectionLab · ZBee vs Pralana · ZBee vs MaxiFi · ZBee vs FIRECalc · ZBee vs cFIREsim · ZBee vs WealthTrace · ZBee vs Empower · ZBee vs Flexible Retirement Planner · ZBee vs Quicken Lifetime Planner.
| ZBee | Boldin | ProjectionLab | Pralana | A 1% advisor | A spreadsheet | |
|---|---|---|---|---|---|---|
| Where your data lives | On your Mac — by design, not policy | Their cloud | Their cloud (the self-hosted edition was discontinued) | Their cloud (or local Excel) | Their systems | Your computer |
| Platform | Native Mac app | Web | Web | Web (+ Excel) | People + web | Excel / Sheets |
| Native iPhone app | Free iPhone & iPad app — a private, on-device estimate | No app — mobile-friendly site | No app — web/PWA | No | Varies | The Sheets app |
| Uses your real accounts | Yes — read-only, direct to your Mac | Yes — linked to their cloud | No — you type them in | No — you type them in | Yes — they hold them | No — you type them in |
| What linking brings in | Your actual holdings, every position, priced as of your last sync, and the projection is built on them | Holdings, synced daily, for a view of your mix. Boldin says they don't change your plan | No linking | No linking | Everything — they hold the accounts | Whatever you type |
| Core question | Most you can safely spend | Will your money last? | Model any scenario | Tax-accurate projections | Whatever you ask | Whatever you build |
| A yearly spending figure with guardrail thresholds |
Yes — this year's trigger points in dollars: the level below which the rules trim (and to what), and where a raise is earned. Published Guyton-Klinger rules you can verify by hand | Yes, since May 2026: a Safe Spending Target with upper and lower guardrails | Modeled inside projections — no live yearly readout | Modeled inside projections — no live yearly readout | Yes — part of the ~1%-of-assets service | Only what you build |
| Would it have survived real market history? |
Yes — automatically: your safe-spend number is replayed through every real market sequence since 1928 (1929, 1966, 1973 and all) and reported as "survived N of M," with any failing years named | Monte Carlo only — no historical replay | Historical backtest available — you set it up per scenario | Historical sequence modeling — advanced, hands-on | Varies by advisor | Only what you build |
| Year-by-year tax detail (you can audit) |
Yes — federal, state, IRMAA, NIIT, RMDs, shown | Yes (no NIIT/AMT) | Yes | Deepest — full 1040-level | Varies by advisor | Only what you build |
| Roth-conversion optimizer | No, by design: enter the Roth plan you or your adviser chose and see exactly what it does | Yes (explorer) | Yes, since April 2026 | Yes | Yes (human) | DIY |
| Shows its methodology & what it won't model |
Yes — cited sources, published | Partial | Partial | Yes (dense) | No | You wrote it |
| Price / year | $132 (30 days free, no account) |
$144 | $129 | $89–119 online, or $99 once for Excel | ~1% of assets (often $5,000+) |
Free |
Prices, account linking, data storage, spending guardrails and optimizers checked against each vendor's own pages in September 2026; the other cells as published July 2026. They change — check each vendor for the current details. ZBee isn't affiliated with any tool listed here.
Where the others do more
Being straight about this: Boldin's account linking covers more kinds of institutions — banks, mortgages, and many workplace 401(k) plans — where ZBee links brokerages (and takes anything else from a screenshot, a PDF or by hand); Boldin also has a guided, hand-holding interface, and since May 2026 a Safe Spending Target with guardrails for every user. Its daily holdings sync feeds a view of your mix, though Boldin says its projection runs on a return you set per account. Pralana and MaxiFi have genuine Roth-conversion and Social Security optimizers that search for an answer — ZBee deliberately doesn't (more below). ProjectionLab lets you model open-ended what-if scenarios, has beautiful charts, and since April 2026 has its own Roth conversion optimizer. A good advisor gives you a human who knows your whole situation. If the thing you want most is an optimizer that tells you what to do, one of those may fit you better — and that's a fine reason to pick it.
Why ZBee draws the line where it does
ZBee measures what your current situation supports; it doesn't tell you to restructure it. It won't run a Roth-conversion optimizer or recommend moving money around, because those are tax-repositioning strategies that depend on things ZBee doesn't know (your estate goals, future tax law, your risk tolerance) and that a CPA or CFP is licensed to advise on. What ZBee does instead is show, transparently, the consequences of the decisions you control — when to retire, when to claim Social Security, how much to leave behind — on its Trade-offs screen, without telling you which to choose. Put simply: enter the Roth conversion plan you or your adviser chose, and ZBee shows exactly what it does. If you want a measurement you can trust and audit, worked out on your own machine, that's the tool ZBee is.
See pricing · Read the methodology · Guyton-Klinger spending guardrails · How much can you safely spend? · Who builds ZBee