The core difference
Portfolio Visualizer is a research and backtesting platform. You enter tickers and weights, and it runs historical simulations: how would this allocation have performed since 1985, what's the factor exposure, what does a Monte Carlo retirement projection look like, which optimizer produces the best risk-adjusted return on past data. It's the most capable public tool for academic-style portfolio analysis, and it answers questions about history and hypotheticals.
Guardfolio is a live portfolio risk monitoring platform. It connects to your brokerage accounts via read-only API and tracks the structural risk of your actual portfolio on a continuous basis: how concentrated you are right now, how far your allocation has drifted from target, whether ETFs are hiding duplicate exposure to the same underlying stocks, how your drawdown and volatility compare to your limits. When any metric crosses a threshold you set, it sends you an alert via email or Telegram.
These tools are not direct competitors. Portfolio Visualizer is the lab where you design a strategy. Guardfolio is the monitoring layer that watches whether your real portfolio is still consistent with that strategy as the market moves. The question is which problem you actually need to solve — and for many investors, both.
Quick verdict
Choose Portfolio Visualizer if your priority is historical backtesting,
factor analysis, Monte Carlo retirement modeling, or optimizer-driven strategy research.
Choose Guardfolio if your priority is monitoring your live portfolio for
concentration creep, allocation drift, ETF overlap, and drawdown — with automated alerts
between reviews.
Use both if you want to design a strategy in PV and then make sure your
live portfolio actually executes it.
What Guardfolio monitors: the six risk dimensions
Guardfolio's value is specific: it tracks the risk metrics that backtesting can never see, because they depend on the live state of your real portfolio. Portfolio Visualizer can tell you whether a 60/40 allocation would have survived 2008. It cannot tell you that your 60/40 has silently drifted to 74/26 over the last bull run, or that your three "diversified" ETFs are 46% concentrated in the same ten mega-cap names.
Concentration risk
Flags when any single position exceeds your concentration limit as a percentage of total portfolio value. Includes look-through for ETFs — so if VTI, QQQ, and a tech fund all hold Nvidia, your effective exposure is measured across all three.
Allocation drift
Tracks how far your actual portfolio weights have moved from your target allocation. A 60/40 portfolio drifts silently during bull runs — Guardfolio measures the gap continuously and alerts you when it exceeds your tolerance band.
ETF overlap
Looks through the holdings of every ETF you own and identifies duplicate underlying stocks. Many investors holding three "diversified" index funds are actually heavily concentrated in the same 10 mega-cap names without realising it.
Drawdown monitoring
Tracks the peak-to-trough decline from your portfolio's recent high in real time. Set a drawdown alert threshold — if your portfolio drops beyond that level, you get notified before the loss compounds further.
Volatility
Measures your portfolio's annualized standard deviation and compares it to your historical baseline. A spike in portfolio volatility — often caused by a new concentrated position or a sector shift — triggers an alert so you can investigate the cause.
Sector exposure
Breaks down holdings by sector and tracks how sector weights shift over time as prices move. Alerts you when any sector exceeds your cap — useful in portfolios that include a mix of ETFs and individual stocks where sector drift is hard to spot manually.
For the full methodology behind these metrics, see Guardfolio's portfolio metrics methodology. To understand how these fit into a monitoring workflow, see how to monitor portfolio performance.
See all six metrics on your own portfolio — in your first session
Connect your accounts and Guardfolio surfaces concentration, hidden ETF overlap, allocation drift, drawdown, volatility, and sector exposure — live, across every brokerage. The first 7 days are free.
Start Free Trial → 7-day free trial · Cancel anytime · Read-only broker accessWhat Portfolio Visualizer is built for
Portfolio Visualizer is among the most capable public tools for quantitative portfolio research. Its strength is the depth of its historical models: backtests with long return series, Fama-French factor regressions, mean-variance and Black-Litterman optimization, Monte Carlo simulations for retirement planning, tactical asset allocation models, and rolling-window analysis. If you want to test whether a small-cap value tilt would have improved a 60/40 portfolio's Sharpe ratio over the last 30 years, PV is purpose-built for that question.
What Portfolio Visualizer does not do is connect to your brokerage. It works with manually entered tickers and weights, or CSV uploads. There is no live sync, no automatic refresh, and no alerting — by design. It is a research lab, not a tracker. The free tier supports basic analysis; paid plans expand portfolio size and reporting features (verify the current free vs paid limits on Portfolio Visualizer's pricing page).
The static-vs-live gap
The fundamental difference between these two tools is the difference between a snapshot and a stream. Portfolio Visualizer takes a portfolio you describe to it and runs analysis on a fixed point in time. That analysis is rigorous, but it freezes the moment you run it. The next day, your real portfolio has moved — prices changed, weights drifted, maybe you added a position — and the PV report you ran yesterday is already out of date.
Guardfolio inverts that. It doesn't ask you to describe your portfolio; it reads it directly from your brokerage. It doesn't run on demand; it runs continuously. And it doesn't produce a report; it watches a set of metrics you care about and pings you when any of them moves into a region that warrants your attention. The two approaches solve genuinely different problems.
Feature comparison
| Feature | Guardfolio | Portfolio Visualizer |
|---|---|---|
| Primary focus | Live portfolio risk monitoring | Historical backtesting & research |
| Live broker / account sync | ||
| Continuous recalculation | ||
| Concentration alerts | ||
| Allocation drift monitoring | ||
| ETF overlap / look-through | ||
| Drawdown alerts | ||
| Volatility monitoring | ||
| Sector exposure monitoring | ||
| Portfolio health score | ||
| Alert channels | ||
| Historical backtesting | ||
| Factor regression (Fama-French) | ||
| Monte Carlo simulation | ||
| Portfolio optimization | ||
| Free portfolio risk check | ||
| Multi-account aggregation |
The "research → execution" workflow
For investors who use both, the natural workflow is a handoff. Portfolio Visualizer is where you do the thinking; Guardfolio is where you make sure the live portfolio matches the thinking.
Design the allocation
In PV, backtest target weights against history. Test factor tilts, run Monte Carlo, pick a target you're willing to commit to.
Portfolio VisualizerStress-test it
Use PV's drawdown and worst-case analysis to understand what your designed portfolio would have done in 2008, 2020, and inflation regimes.
Portfolio VisualizerConnect live accounts
In Guardfolio, link your brokerages via read-only API. Set drift bands, concentration limits, drawdown thresholds, and overlap caps based on the design.
GuardfolioGet alerted on drift
Guardfolio watches the live portfolio between reviews and pings you when concentration, drift, overlap, or drawdown crosses your threshold.
GuardfolioThis is the pattern most disciplined investors converge on: design infrequently, monitor continuously. Portfolio Visualizer handles the design step well; Guardfolio handles the monitor step. Neither tool is complete on its own for an investor who wants both rigor and ongoing oversight.
When Portfolio Visualizer is the right choice
Portfolio Visualizer is built for investors and researchers who think about portfolios quantitatively — who want to test whether a strategy holds up against decades of data before committing real money. Its depth of historical models is genuinely best-in-class for a public tool, and it has no real substitute for that workflow.
Best for Portfolio Visualizer
- Quantitative investors backtesting allocations against decades of history
- Researchers running factor regressions and tactical model analysis
- Retirement planners modeling sequence-of-returns risk via Monte Carlo
- Investors comparing optimizers (mean-variance, Black-Litterman, risk parity)
- Anyone validating a strategy before putting real capital at risk
Best for Guardfolio
- Investors who want concentration, drift & overlap alerts on live accounts
- Multi-brokerage investors who need a unified live risk view across 30+ exchanges
- ETF holders who want look-through detection of hidden mega-cap concentration
- Self-directed investors who want drawdown and volatility alerts on real money
- Long-term investors who review quarterly but want automation in between
When Guardfolio is the right choice
Guardfolio is built for the period after the strategy is set. The core use case is catching structural risk problems on your live portfolio that are invisible without active monitoring: concentration creep from a position that grew quietly, allocation drift from a strong equity run, hidden ETF overlap creating more single-stock exposure than intended, or a drawdown that is moving toward a level you would want to act on.
Guardfolio is not a backtesting engine, an optimizer, or a research lab. It is a risk monitoring layer — the thing you connect to your brokerage accounts so that your portfolio monitoring runs continuously and alerts you when something changes materially. For the research side of your workflow, Portfolio Visualizer remains the better tool.
Can you use both?
Yes — and it is the most common combination among disciplined self-directed investors. Portfolio Visualizer handles strategy design and validation: backtesting, factor analysis, Monte Carlo, optimization. Guardfolio handles execution monitoring: making sure your real, live portfolio still looks like the one you designed in PV. They do not overlap in function.
If you've ever spent an afternoon in PV designing a clean target allocation, only to look at your real portfolio six months later and realize it has drifted into something you wouldn't have chosen, Guardfolio is the layer that closes that loop. PV tells you what to aim for; Guardfolio tells you when you've drifted off it.
See exactly where your live portfolio is leaking risk
Backtests tell you what would have hurt you. Guardfolio tells you what's hurting you right now — hidden ETF overlap, concentration creep, drift, drawdown, and volatility on your real, live portfolio. Try it free for 7 days.
Start Free Trial → 7-day free trial · Cancel anytime · Read-only broker accessFrequently asked questions
What is the difference between Guardfolio and Portfolio Visualizer?
Portfolio Visualizer is a research and backtesting platform: you enter tickers and weights, and it runs historical simulations, factor regressions, and Monte Carlo models. Guardfolio is a portfolio risk management platform: it connects to brokerages via read-only API and monitors concentration, allocation drift, ETF overlap, drawdown, and volatility on your live portfolio — alerting you when any metric crosses a threshold. Portfolio Visualizer answers "what would have happened?"; Guardfolio answers "what is happening now?"
Does Portfolio Visualizer support live brokerage connections?
No. Portfolio Visualizer is built around manually entered tickers and weights, or CSV uploads. It does not sync to brokerages and does not refresh holdings automatically. Guardfolio connects to 30+ exchanges and brokerages via read-only API and recalculates risk metrics continuously without manual updates.
Does Portfolio Visualizer have portfolio risk alerts?
Portfolio Visualizer is a static research tool — it produces reports on demand when you run a model. It does not send portfolio risk alerts when your real portfolio drifts, concentration builds, or drawdown exceeds a threshold. Guardfolio is built specifically for that monitoring layer and sends email or Telegram alerts when any tracked metric crosses your limits.
What is the best alternative to Portfolio Visualizer for live monitoring?
Guardfolio is designed specifically for live portfolio risk monitoring. It tracks concentration risk, ETF overlap, allocation drift, volatility, and drawdown continuously across connected accounts and sends email or Telegram alerts when any metric crosses your thresholds. It covers the live monitoring gap that Portfolio Visualizer does not address — Portfolio Visualizer remains the better tool for backtesting and historical research.
Can I monitor my portfolio across multiple accounts with Guardfolio?
Yes. Guardfolio connects to 30+ exchanges and brokerages via read-only API and aggregates all holdings into a single unified risk view. Risk metrics — concentration, allocation drift, ETF overlap, volatility, and drawdown — are calculated at the combined portfolio level, not account by account. This is the key advantage over running a PV report on each account separately or trying to manually consolidate them in a spreadsheet.
Is Guardfolio free?
Guardfolio offers a free portfolio health check with no signup required: upload your holdings and get an instant view of ETF overlap, concentration score, sector exposure, and volatility. Ongoing portfolio monitoring with automated alerts requires a paid plan. See the free risk check to start.
Can I use Guardfolio and Portfolio Visualizer together?
Yes, and it's the most common combination among disciplined investors. Use Portfolio Visualizer to research and backtest a target allocation — testing factor exposures, running Monte Carlo retirement scenarios, comparing historical drawdowns. Then use Guardfolio to monitor whether your live portfolio actually stays consistent with that designed allocation over time. PV is the lab; Guardfolio is the production environment.
Catch risk the moment it happens — not after.
Backtests show what would have hurt you. Guardfolio shows what is hurting you, live.
- Live concentration & ETF overlap alerts
- Drift, drawdown & volatility monitoring
- Read-only sync across 30+ brokers