Closed Beta • Up to 50 Testers • US-Focused

Are your portfolio choices beating the benchmark?

Parlark compares your real brokerage accounts (from your own Google Sheet) against a simple index-fund benchmark. See what the market would have done with your exact deposit timing and cash flows — and whether your active decisions are ahead.

Request Access → Starter sheet (CSV) ↓

Informational portfolio tracking only • Not financial advice

Illustrative Benchmark Model Example — Not Real User Data

Outcome vs S&P 500 +$4,210 (+7.8%)

Your Portfolio ($58,410)

Benchmark VOO / S&P 500 ($54,200)

How It Works

Three steps to portfolio truth

No bank aggregators, no sharing account passwords. Just clean, cash-flow matched benchmarking from your personal Google Sheet.

Connect your sheet

Pick your tracker spreadsheet with Google's secure native file picker. We ask for read-only access strictly to the single file you select — zero access to your Google Drive or any other document.

We match your columns

Our schema matcher identifies your trade dates, tickers, action types (buy, sell, dividend, deposit), and shares. Verify or customize the mapping in seconds without altering your spreadsheet formatting.

See if you're ahead or behind

Parlark reconstructs hypothetical index purchases on the exact calendar days you deposited cash. Know your dollar alpha, Internal Rate of Return (IRR), and time-weighted returns instantly.

Core Capabilities

Engineered for realistic portfolio analysis

Standard brokerage dashboards show account totals, but hide whether your timing beat a simple index fund. Parlark does the heavy lifting.

Tracking Date & Milestones

Benchmark from total account inception, year-to-date, or specific portfolio adjustments to isolate how individual strategy shifts performed.

Hidden Fees & Cash Drag

Measure the true cost of uninvested cash cushions, advisory management percentages, and high expense ratios vs an ultra-low-cost index.

Projections & Plans

Project multi-year compound trajectories with scheduled recurring contributions, automated rebalancing rules, and dividend reinvestment.

Taxes & Lot Matching

Separate tax-advantaged accounts (401k, Roth IRA) from taxable brokerages, tracking realized gains, wash-sale impacts, and lot accounting.

Zero-Exposure Privacy Promise

"We can't see your portfolio"

Your financial records belong exclusively to you. Parlark is designed with strict tenant isolation and zero-exposure security.

Read-only access to only the sheet you pick (Google drive.file scope)

We use Google’s fine-grained drive.file scope. Parlark never receives access to your Google Drive, folders, or other files — only the single spreadsheet you pick.

Data encrypted per user

All transient cache objects and auth tokens are secured with dedicated cryptographic isolation and tenant-scoped keys. No pooled cross-user storage.

No selling data

We do not sell, broker, or monetize your portfolio entries, trade history, or personal data. We do not train public AI models on your private data.

Delete your data anytime

One-click self-service data purge permanently erases all tenant records, tokens, and cached calculations immediately upon request.

Closed Beta Access

Ready to find out if your picks beat the market?

We are opening onboarding for our first cohort of up to 50 US-based self-directed investors. Connect your spreadsheet and get clear benchmark answers today.

Join the Waitlist — app.parlark.com →

Requires a Google account and a spreadsheet with your transaction history • Free during closed beta • Not financial advice