VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Wednesday, November 19, 2025

Tool Comparison

InsideArbitrage vs SEC API (sec-api.io) comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

InsideArbitrage adds News, Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Dividends, Splits, Institutional Data, Screeners, Data Visualizations, Portfolio, Watchlist, Blogs, Newsletters, Videos, Playbooks & Case Studies, and PDF Annotation coverage that SEC API (sec-api.io) skips.

SEC API (sec-api.io) includes Data APIs, Financials, Management Compensation, IPO, and APIs & SDKs categories that InsideArbitrage omits.

In depth comparison

InsideArbitrage

insidearbitrage.com

Event‑driven research platform by Asif Suria focused on merger arbitrage, insider transactions, spinoffs, buybacks, activists, and related special situations. Premium includes tools like the Merger Arbitrage Tool, CVR database, buyback & spinoff trackers, premium screens (IA Score, cluster buys, ‘double dipper’), ‘Deals‑in‑the‑Works’ and deal calendars. IA Professional adds pro‑only features (e.g., CVR outcomes, activist tracker, reverse‑splits tracker, Insider Performance Score) and multi‑seat licensing.

Platforms

Web

Pricing

FreeSubscription

Quick highlights

Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.
Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards.

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SEC API (sec-api.io)

sec-api.io

Editor’s pick Hands-on review

A commercial API suite for SEC/EDGAR data, designed for developers, quants, and compliance teams. The free tier includes 100 calls per month. Paid tiers unlock higher rate limits, more data (5 GB vs 15 GB monthly, with $0.30/GB overage), and features such as multiple API keys or redistribution rights for enterprise users. The platform emphasizes speed, with new filings typically available in under 300 ms.

Platforms

WebAPI

Pricing

FreeSubscription

Quick highlights

Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings.
Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN).
Datasets include executive compensation, directors and board members, audit fees, subsidiaries, and public float/outstanding shares.
Historical coverage back to 1993 with support for all 400+ EDGAR form types; new filings made available within ~300 ms of posting.
Live filing feeds available in real time via WebSocket for instant integration.

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Where they differ

InsideArbitrage

Distinct strengths include:

News Alerts Calendar Acquisitions Spin-offs Buybacks & Authorizations Dividends Splits

Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.

SEC API (sec-api.io)

Distinct strengths include:

Data APIs Financials Management Compensation IPO APIs & SDKs

Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings.
Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN).
Datasets include executive compensation, directors and board members, audit fees, subsidiaries, and public float/outstanding shares.
Historical coverage back to 1993 with support for all 400+ EDGAR form types; new filings made available within ~300 ms of posting.

Feature-by-feature breakdown

Attribute	InsideArbitrage	SEC API (sec-api.io)
Categories Which research workflows each platform targets	Shared: Insider Data, 13F, 13D/13G, Regulatory Filings Monitoring Unique: News, Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Dividends, Splits, Institutional Data, Screeners, Data Visualizations, Portfolio, Watchlist, Blogs, Newsletters, Videos, Playbooks & Case Studies, PDF Annotation	Shared: Insider Data, 13F, 13D/13G, Regulatory Filings Monitoring Unique: Data APIs, Financials, Management Compensation, IPO, APIs & SDKs
Asset types Supported asset classes and universes	Stocks, ETFs	Stocks, ETFs, Mutual Funds, Funds
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web	Web, API
Pricing High-level pricing models	Free, Subscription	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems. Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map. Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks). Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes. Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards. Event‑driven monitor & M&A news feed; earnings calendar; tender‑offers tracker; activist‑campaign tracker; C‑suite transitions tool.	Unique Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings. Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN). Datasets include executive compensation, directors and board members, audit fees, subsidiaries, and public float/outstanding shares. Historical coverage back to 1993 with support for all 400+ EDGAR form types; new filings made available within ~300 ms of posting. Live filing feeds available in real time via WebSocket for instant integration. XBRL-to-JSON service delivers standardized financial statements (income, balance sheet, cash flow) mapped to US GAAP items; dataset is survivorship-bias free.
Tested Verified by hands-on testing inside Find My Moat	Not yet	Yes
Editor pick Featured inside curated shortlists	Standard listing	Highlighted

Frequently Asked Questions

Which workflows do InsideArbitrage and SEC API (sec-api.io) both support?

Both platforms cover Insider Data, 13F, 13D/13G, and Regulatory Filings Monitoring workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do InsideArbitrage and SEC API (sec-api.io) require subscriptions?

Both InsideArbitrage and SEC API (sec-api.io) keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access InsideArbitrage and SEC API (sec-api.io)?

Both InsideArbitrage and SEC API (sec-api.io) prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

InsideArbitrage differentiates itself with Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems., Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map., and Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks)., whereas SEC API (sec-api.io) stands out for Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings., Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN)., and Datasets include executive compensation, directors and board members, audit fees, subsidiaries, and public float/outstanding shares..

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