VOL. XCIV, NO. 247
★ BEST INVESTING TOOLS COMPARISON ★
NO ADVICE
Saturday, January 31, 2026
Tool Comparison
Portfolio123 vs Stock Spinoff Investing comparison
Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.
Portfolio123
portfolio123.com
Stock Spinoff Investing
stockspinoffinvesting.com
At a glance
| Portfolio123 | Stock Spinoff Investing | |
|---|---|---|
| Free tier | ||
| Free trial | ||
| Starting price | $25/mo | $58.08/mo |
| Enterprise option | ||
| Available plans | Manage (Free), Retail Research Plans, Professional / API & Data Licenses, Research Trial | SSI Premium (Monthly), SSI Premium (Annual), SSI Pro (Annual), Public Calendars (Free) |
Vote sentiment comparison
Loading sentiment chart...
Platform details
| Attribute | Portfolio123 | Stock Spinoff Investing |
|---|---|---|
Asset types | StocksETFsClosed-End Funds | Stocks |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEurope | North AmericaEuropeAPAC |
Data freshness | Real-timeEnd of Day | End of Day |
API access | REST | Not specified |
Export formats | JSON | Not specified |
Coverage overlap
Categories covered by Portfolio123 only.
Categories covered by Stock Spinoff Investing only.
Frequently Asked Questions
What's the difference between Portfolio123 and Stock Spinoff Investing?
Portfolio123 focuses on Screeners, Data Visualizations, and Quant while Stock Spinoff Investing specializes in Stock Ideas, Calendar, and Spin-offs. They overlap in 3 categories, so choose based on your preferred workflow and pricing.
How much do Portfolio123 and Stock Spinoff Investing cost?
Good news—both Portfolio123 and Stock Spinoff Investing offer free plans. You can try each platform without commitment and only pay when you need premium features.
Does Portfolio123 or Stock Spinoff Investing have an API?
Portfolio123 provides API access for programmatic data retrieval and custom integrations. Stock Spinoff Investing doesn't currently offer an API, so you'll need to use their web interface.
Should I choose Portfolio123 or Stock Spinoff Investing?
Choose Portfolio123 if you need Web‑based quant research terminal for building multifactor ranking systems, stock/ETF screens, and complete rules‑based strategies with no programming, powered by point‑in‑time FactSet data and marketed as free of survivorship and look‑ahead bias., and Supports realistic simulations and backtests over roughly 20 years of history for US, Canadian, and European equities, with custom universes, separate buy/sell rules, position sizing, hedging, and “Book of Strategies” to combine and analyze correlated systems.. Go with Stock Spinoff Investing if Spin‑off Calendar: **Upcoming** table with parent/spinco, tickers, target timing, first‑trade date, and resource links; plus a **Completed** table with first‑day price, current price, and return since spin‑off., and Premium research: ~1 new idea per month with detailed write‑ups, weekly email updates, and a live monthly video Q&A. better fits how you invest.
What asset classes do Portfolio123 and Stock Spinoff Investing cover?
Both cover Stocks. Portfolio123 also includes ETFs, and Closed-End Funds.
Does Portfolio123 or Stock Spinoff Investing have real-time data?
Portfolio123 offers real-time data feeds, which is essential for active traders. Stock Spinoff Investing uses delayed or end-of-day data, which works fine for longer-term investors who don't need up-to-the-second quotes.
Can Portfolio123 or Stock Spinoff Investing connect to my broker?
Portfolio123 connects with brokers for portfolio syncing. Stock Spinoff Investing requires manual portfolio entry or data import.
Which has a better stock screener—Portfolio123 or Stock Spinoff Investing?
Portfolio123 includes a stock screener for finding investment ideas. Stock Spinoff Investing focuses on other analytical tools.
Can I track my portfolio with Portfolio123 or Stock Spinoff Investing?
Portfolio123 offers portfolio tracking features. Stock Spinoff Investing is more focused on research and analysis.
Other tools you might like
These profiles share overlapping coverage with both sides of this matchup.
Keep Exploring
Global rankings of the highest-rated tools across all categories.
Ranked list of companies with durable competitive advantages.
Proven models entering their growth phase with solid economics.
Track votes, sentiment, and engagement across the community.
Learn moat types, red flags, and real-company examples.
Browse other head-to-head tool comparisons and alternatives.
Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.