An OpenInsider Alternative
Looking for an alternative to OpenInsider? Here is an honest head to head: what OpenInsider does well, what InsiderAlpha adds, and when you should simply use both.
Credit where it is due
OpenInsider is a free screener over SEC Form 4 filings, and it is entirely free: no paid tier, no locked columns. If a raw Form 4 screener is everything you need, it is a fine tool - and InsiderAlpha's screener is also free, with no account required, if you want a second opinion on the same filings.
The comparison below is therefore not "which screener is better". It is about everything that happens after the screen: deciding which of today's hundreds of filings actually matter.
Head to head
OpenInsider claims read from openinsider.com on 27 August 2026. "Not mentioned on their site" means exactly that: we read their pages and could not find it, not that it cannot be done.
| OpenInsider | InsiderAlpha | |
|---|---|---|
| Form 4 screening | Yes, free, and no account needed | Yes, free, and no account needed |
| What it costs | Free. No paid tier, no pricing page | Free account, no card. Paid tiers add same-day recency |
| Ranked daily shortlist | Not what it is for. It is a screener: you sort the table | A scored daily plan with entry bands and exit rules |
| Per-insider track record | Not mentioned on their site | Win rate and average forward return for every insider with enough history |
| Form 144 (planned sales) | Not mentioned on their site | Tracked market-wide, with the filer resolved to an insider profile |
| Form 8-K (catalysts) | Not mentioned on their site | Every 8-K as it is filed, cross-referenced against insider buying in the same name over the previous 42 days |
| Alerts | Not mentioned on their site | Free daily email digest and RSS. Mobile push on paid plans |
| Programmatic access | Not mentioned on their site | Hosted MCP server and personal access tokens |
Comparing more than two tools? The full table covers six of them on price, free tier, data latency, Form 144 and 8-K coverage, alerts and API access.
What InsiderAlpha adds on top of a screener
A scored daily trading plan, not a sorted table
Every qualifying open-market purchase is scored on the insider's role, purchase size, freshness, clustering and the stock's liquidity and technicals, and the result is a ranked daily plan with entry bands and exit rules - a decision surface, not a data dump.
Insider track records
A purchase means more when the buyer has a history of being right. InsiderAlpha keeps a profile for every active insider - biography, roles, photo, and a record of how their past open-market purchases worked out, computed from the filings themselves rather than self-reported.
Beyond Form 4
Insider selling announces itself in advance on Form 144, and price catalysts arrive as 8-K filings. InsiderAlpha tracks Form 144 notices and every 8-K as it is filed alongside the 233,281 Form 4 filings in the database, and matches each 8-K to the insider buying that came before it, so the buy signal and its context live in one place.
Alerts, API and mobile
A free daily email digest and RSS feeds, programmatic access through a hosted MCP server and API your AI assistant can query directly, and mobile apps with push alerts on the way.
The research to check our homework
The learn library documents how each signal works and where it fails, citing the academic literature rather than asserting an edge.
When you should not switch
If you open a Form 4 screener once a week, sort by value and move on, OpenInsider already does that and costs nothing. Adding a second tool for it would be work without a reason, and we would rather say so than sell you something you do not need.
The case for InsiderAlpha starts where the screen ends: when you want the day's filings ranked rather than listed, want to know whether the buyer has been right before, or want the signal to reach you instead of you going to look for it.
Pricing, plainly
OpenInsider is free. InsiderAlpha has a free account of its own, which takes no card and does not expire, and the screener, the company and insider pages and the filing feeds cost nothing and mostly need no account at all. The paid plans sell one thing above all: freshness - the plan on the day, updated as filings land. See the plans.
If you never need same-day signals, stay on the free tools. They are the acquisition channel, not a teaser.
Questions people ask about this
Is OpenInsider free?
Yes, entirely. Read from openinsider.com on 27 August 2026: there is no paid tier, no pricing page and no premium page anywhere on the site. If a free Form 4 screener is all you need, it is a good one and you do not need to replace it.
Is InsiderAlpha free?
There is a free InsiderAlpha account. It takes no card, has no trial clock and does not expire. It carries the daily trading plan one trading day late plus the whole plan archive, the daily email digest and RSS feeds, watchlists, search, and the hosted MCP server so an AI assistant can query it. Separately, the filing corpus itself is open with no account at all: company pages, insider pages, the filing feeds and the screener. What the paid tiers sell is same-day recency, not access.
What does InsiderAlpha do that OpenInsider does not?
Four things, all of them after the screen rather than in it: it scores each qualifying open-market purchase into a ranked daily plan with entry bands and exit rules instead of a sortable table; it keeps a track record for every insider so you can see who has been right before; it covers Form 144 and 8-K alongside Form 4, so the buy signal and its context sit in one place; and it delivers, through email, RSS, mobile push and a hosted MCP server an AI assistant can query directly.
Should I switch from OpenInsider to InsiderAlpha?
Not if what you want is a raw Form 4 screener. OpenInsider is free, quick and good at that, and so is the InsiderAlpha screener, which also needs no account. Switch, or add InsiderAlpha alongside it, when the problem is no longer finding the filings but deciding which of today's hundreds actually matter.
What are the alternatives to OpenInsider?
OpenInsider, InsiderAlpha, InsiderScreener, Quiver Quantitative, Finviz and SecForm4 all cover SEC insider filings in some form, and they differ most on price, on how fresh the data is, and on whether they go beyond Form 4. There is a table comparing all six, with a source and a verification date for every claim, at insideralpha.ai/compare.