VOL. XCIV, NO. 247

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Sunday, October 5, 2025

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Head-to-head

Find and update company information (Companies House) vs SEC API (sec-api.io) comparison

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

Quick takeaways

Find and update company information (Companies House) adds Alerts coverage that SEC API (sec-api.io) skips.

SEC API (sec-api.io) includes Insider Data, 13F, 13D/13G, Financials, Management Compensation, IPO, and APIs & SDKs categories that Find and update company information (Companies House) omits.

Find and update company information (Companies House) highlights: Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data., Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history., and Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express)..

SEC API (sec-api.io) is known 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..

Find and update company information (Companies House)

find-and-update.company-information.service.gov.uk

The official UK companies register, providing free search and access to filing histories, document images, and company information. Users can follow companies for email alerts on new filings, and bulk data is available via monthly downloads. Certified copies and certificates are offered for a fee. Developers have access to REST and Streaming APIs with clear rate limits, making the service a reliable, real-time regulatory source.

Platforms

Web

API

Pricing

Free

Quick highlights

Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data.
Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history.
Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express).
Bulk data available as monthly CSV snapshots of the entire UK companies register.
Public REST API providing structured access to company data (companies, officers, persons of significant control, etc.), authenticated via API key; some flows support OAuth2. Rate limit of 600 requests per 5 minutes.

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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

Web

API

Pricing

Free

Subscription

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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Overlap

Shared focus areas

2 overlaps

Mutual strengths include Regulatory Filings Monitoring, and Data APIs.

Where they differ

Find and update company information (Companies House)

Distinct strengths include:

Alerts

Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data.
Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history.
Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express).
Bulk data available as monthly CSV snapshots of the entire UK companies register.

SEC API (sec-api.io)

Distinct strengths include:

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	Find and update company information (Companies House)	SEC API (sec-api.io)
Categories Which research workflows each platform targets	Shared: Regulatory Filings Monitoring, Data APIs Unique: Alerts	Shared: Regulatory Filings Monitoring, Data APIs Unique: Insider Data, 13F, 13D/13G, Financials, Management Compensation, IPO, APIs & SDKs
Asset types Supported asset classes and universes	Other	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, API	Web, API
Pricing High-level pricing models	Free	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data. Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history. Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express). Bulk data available as monthly CSV snapshots of the entire UK companies register. Public REST API providing structured access to company data (companies, officers, persons of significant control, etc.), authenticated via API key; some flows support OAuth2. Rate limit of 600 requests per 5 minutes. Streaming API for real-time updates covering company information, filing history, insolvency, and charges.	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 Find and update company information (Companies House) and SEC API (sec-api.io) both support?

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

Do Find and update company information (Companies House) and SEC API (sec-api.io) require subscriptions?

Both Find and update company information (Companies House) 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 Find and update company information (Companies House) and SEC API (sec-api.io)?

Both Find and update company information (Companies House) 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?

Find and update company information (Companies House) differentiates itself with Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data., Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history., and Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express)., 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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