VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Tool details checked August 23, 2026
Tool Comparison
BuySide Digest - Hedge Fund Letter Database vs InsideArbitrage
Pick BuySide Digest - Hedge Fund Letter Database instead if
BuySide Digest - Hedge Fund Letter Database
Free · Web
- You want stock ideas.
Start here
InsideArbitrage
Free • From $100/mo · Web
- You want calendar, corporate actions & special situations, and dividends.
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
BuySide Digest - Hedge Fund Letter Database and InsideArbitrage cover a lot of the same ground (5 shared categories, including news, newsletters, and institutional ownership), so for the basics you won't go far wrong with either. InsideArbitrage simply does more: 17 categories to BuySide Digest - Hedge Fund Letter Database's 6, including calendar, corporate actions & special situations, and dividends. BuySide Digest - Hedge Fund Letter Database counters by being completely free.
What readers say
BuySide Digest - Hedge Fund Letter Database
No votes yet. Cast the first one.
InsideArbitrage
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Key differences at a glance
- Broader coverage
- InsideArbitrage17 vs 6 categories
- 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 | Free • From $100/mo |
Free tier | Yes | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | No | No |
Broker sync | No | No |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 6 | 17 |
Regions | North America, Europe, APAC | — |
| Data & capabilities | ||
Capabilities | — | Universe builder |
| Try it | Visit BuySide Digest - Hedge Fund Letter Database | Visit InsideArbitrage |
Where each one shines
What BuySide Digest - Hedge Fund Letter Database and InsideArbitrage each do best.ShowHide
Where each one shines
What BuySide Digest - Hedge Fund Letter Database and InsideArbitrage each do best.What BuySide Digest - Hedge Fund Letter Database does best
- Search tools across hedge-fund letters by fund, CIO, ticker, keyword, theme, and quarter.
- Direct access to per-fund pages to review letter history and follow manager commentary over time.
- Monitor funds or tickers to receive inbox updates when new letters are added.
- BSD 13F tools for investor screens, largest buys and sells, consensus holdings, GICS weights, and related ownership context.
- Reading access to Elevator Pitches that condense stock ideas surfaced from manager letters.
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.
Every detail we compared
Every tracked attribute for BuySide Digest - Hedge Fund Letter Database and InsideArbitrage, side by side.ShowHide
Every detail we compared
Every tracked attribute for BuySide Digest - Hedge Fund Letter Database and InsideArbitrage, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksETFs |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEuropeAPAC | Not specified |
Coverage details | Identifiers: Ticker | Identifiers: Ticker and CIK |
| Access & integrations | ||
Export formats | PDF | Not specified |
| Plans & trust | ||
Capability signals | Not specified | Universe builder |
Vendor & support | BuySide DigestSupport: Email | InsideArbitrageSupport: Email |
Curation ratings | Methodology 3/5Reliability 3/5UX 4/5 | Methodology 3/5Reliability 3/5UX 4/5 |
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 | Free“Public Articles and Data” |
| Entry paid plan | — | $100/mo“Premium - Annual” |
| Top plan | — | $150/mo“Premium - Monthly” |
Questions we keep getting
What's the difference between BuySide Digest - Hedge Fund Letter Database and InsideArbitrage?
BuySide Digest - Hedge Fund Letter Database leans toward stock ideas, news, and newsletters, while InsideArbitrage puts more weight on news, alerts, and calendar. They overlap in 5 categories, so for most people it comes down to workflow preference and price.
How much do BuySide Digest - Hedge Fund Letter Database and InsideArbitrage cost?
Good news: both BuySide Digest - Hedge Fund Letter Database and InsideArbitrage have free plans, so you can run them side by side and only pay if you hit a wall.
Should I choose BuySide Digest - Hedge Fund Letter Database or InsideArbitrage?
It depends on what you're after. Pick BuySide Digest - Hedge Fund Letter Database if stock ideas matter to you; go with InsideArbitrage if you'd rather have calendar and corporate actions & special situations. And if you only need the basics both share, let price decide.
Which has a better stock screener: BuySide Digest - Hedge Fund Letter Database or InsideArbitrage?
InsideArbitrage has a stock screener for surfacing ideas; BuySide Digest - Hedge Fund Letter Database doesn't, and focuses its energy elsewhere.
Can I track my portfolio with BuySide Digest - Hedge Fund Letter Database or InsideArbitrage?
InsideArbitrage handles portfolio tracking. BuySide Digest - Hedge Fund Letter Database 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.