VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Tool details checked August 23, 2026
Tool Comparison
InsideArbitrage vs Stock Spinoff Investing
Start here
InsideArbitrage
Free • From $100/mo · Web
- You want news, alerts, and dividends.
Pick Stock Spinoff Investing instead if
Stock Spinoff Investing
Free • From $58.08/mo · Web
- You want the cheaper way in: plans start at $58.08/mo instead of $100/mo
- You want stock ideas.
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
InsideArbitrage and Stock Spinoff Investing cover a lot of the same ground (5 shared categories, including calendar, corporate actions & special situations, and blogs), so for the basics you won't go far wrong with either. InsideArbitrage simply does more: 17 categories to Stock Spinoff Investing's 6, including news, alerts, and dividends. Stock Spinoff Investing counters by starting cheaper at $58.08/mo.
What readers say
InsideArbitrage
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Stock Spinoff Investing
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Key differences at a glance
- Cheaper paid plan
- Stock Spinoff Investing$58.08/mo vs $100/mo
- Broader coverage
- InsideArbitrage17 vs 6 categories
- Asset coverage
- InsideArbitrageAdds ETFs
- Free plan
- Both
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • From $100/mo | Free • From $58.08/mo |
Free tier | Yes | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | No | No |
Broker sync | No | — |
Integrations | — | Discord and Memberful |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 17 | 6 |
Regions | — | North America, Europe, APAC |
| Data & capabilities | ||
Data quality | — | 3 signals: Latency: End of Day, Granularity: EOD +1 more |
Capabilities | Universe builder | — |
| Try it | Visit InsideArbitrage | Visit Stock Spinoff Investing |
Where each one shines
What InsideArbitrage and Stock Spinoff Investing each do best.ShowHide
Where each one shines
What InsideArbitrage and Stock Spinoff Investing each do best.What InsideArbitrage does best
- Track announced mergers, spreads, calendars, deal updates and potential deals.
- Filter news, SEC filings and social posts for premium tracked-deal symbols.
- Research insider activity through transaction pages, weekly articles, cluster-buy screens and insider rankings.
- Follow buybacks, spinoffs, CVRs, tender offers, reverse splits, activist campaigns and management changes.
- Use 13F, 13D, 13G and Form 4 data for institutional and insider ownership context.
What Stock Spinoff Investing does best
- An upcoming spin-off calendar with parent and spinco names, tickers, target timing, first-trade dates, and resource links.
- A completed spin-off table with first-day price, current price, and return since spin-off.
- Free calendars as a discovery layer for spin-off research before reading filings, investor presentations, and transaction documents.
- SSI Premium includes about one new idea per month, detailed write-ups, weekly email updates, and prior newsletters.
- Premium also includes a live monthly video Q&A and a members-only Discord.
Every detail we compared
Every tracked attribute for InsideArbitrage and Stock Spinoff Investing, side by side.ShowHide
Every detail we compared
Every tracked attribute for InsideArbitrage and Stock Spinoff Investing, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | Stocks |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | Not specified | North AmericaEuropeAPAC |
Coverage details | Identifiers: Ticker and CIK | 6 exchangesIdentifiers: Ticker |
| Data | ||
Data freshness | Not specified | End of Day |
Data granularity | Not specified | EOD |
| Access & integrations | ||
Integrations | Not specified | DiscordMemberful |
| Plans & trust | ||
Capability signals | Universe builder | Not specified |
Vendor & support | InsideArbitrageSupport: Email | Stock Spinoff Investing (operated by Rich Howe, CFA)Country: USFounded 2018Support: Email |
Curation ratings | Methodology 3/5Reliability 3/5UX 4/5 | Methodology 3/5Reliability 3/5UX 3/5 |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | Free“Public Articles and Data” | Free“Public Calendars (Free)” |
| Entry paid plan | $100/mo“Premium - Annual” | $58.08/mo“SSI Premium (Annual)” |
| Top plan | $150/mo“Premium - Monthly” | $97/mo“SSI Premium (Monthly)” |
Questions we keep getting
What's the difference between InsideArbitrage and Stock Spinoff Investing?
InsideArbitrage leans toward news, alerts, and calendar, while Stock Spinoff Investing puts more weight on stock ideas, calendar, and corporate actions & special situations. They overlap in 5 categories, so for most people it comes down to workflow preference and price.
How much do InsideArbitrage and Stock Spinoff Investing cost?
Good news: both InsideArbitrage and Stock Spinoff Investing have free plans, so you can run them side by side and only pay if you hit a wall.
Should I choose InsideArbitrage or Stock Spinoff Investing?
It depends on what you're after. Pick InsideArbitrage if news and alerts matter to you; go with Stock Spinoff Investing if you'd rather have stock ideas. And if you only need the basics both share, let price decide.
What asset classes do InsideArbitrage and Stock Spinoff Investing cover?
Both cover stocks. InsideArbitrage also handles ETFs.
Which has a better stock screener: InsideArbitrage or Stock Spinoff Investing?
InsideArbitrage has a stock screener for surfacing ideas; Stock Spinoff Investing doesn't, and focuses its energy elsewhere.
Can I track my portfolio with InsideArbitrage or Stock Spinoff Investing?
InsideArbitrage handles portfolio tracking. Stock Spinoff Investing is really a research tool; you'd track your portfolio elsewhere.
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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.