VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View OTC Markets View PCAOB AuditorSearch Back to Home

Head-to-head

OTC Markets vs PCAOB AuditorSearch comparison

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

Quick takeaways

OTC Markets adds Data APIs, Order Book / Level II, News, Ticker Changes, Splits, Dividends, APIs & SDKs, and Screeners coverage that PCAOB AuditorSearch skips.

OTC Markets highlights: Real‑Time Level 1+ (inside bid/offer + trades) and Level 2+ (full quote book with market participant IDs) data products; Delayed Level 1+ on a 15‑minute basis; End‑of‑Day snapshots., Level 2 quote montage specification (fields: MPID, price, QAP, size, time‑of‑update) and display requirements., and Reference & pricing files (security master with optional CUSIP), plus End‑of‑Day pricing files; secure SFTP delivery supported..

PCAOB AuditorSearch is known for: Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers., Displays engagement partner details, audit firm name and location, and the extent of participation of other firms., and Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time..

OTC Markets

otcmarkets.com

Primary operator and market data source for U.S. OTC equities via OTC Link ATS/ECN/NQB (SEC‑regulated ATSs). Commercial data products include Real‑Time Level 1+ (inside quote & trades), Level 2+ (full quote book with MPIDs), 15‑minute delayed Level 1+, End‑of‑Day, reference/security master, and compliance datasets (Blue Sky, Promotion/CE, Compliance Analytics). Delivery options include real‑time multicast feeds, SFTP/FTP files, and a REST Disclosure API. Website provides delayed quotes, corporate actions, screeners and issuer news (DNS).

Platforms

Web

API

Pricing

Free

Subscription

Quick highlights

Real‑Time Level 1+ (inside bid/offer + trades) and Level 2+ (full quote book with market participant IDs) data products; Delayed Level 1+ on a 15‑minute basis; End‑of‑Day snapshots.
Level 2 quote montage specification (fields: MPID, price, QAP, size, time‑of‑update) and display requirements.
Reference & pricing files (security master with optional CUSIP), plus End‑of‑Day pricing files; secure SFTP delivery supported.
Disclosure API (REST, JSON/CSV/XML) with app‑key auth; filter by symbol/CUSIP/company; document retrieval; plan‑level rate‑limit guidance.
Compliance & regulatory data: Blue Sky Data (state eligibility monitoring), Promotion Data file (Caveat Emptor/tier/share data), and Compliance Analytics (multi‑factor risk scoring).

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PCAOB AuditorSearch

pcaobus.org

Free public database built from Form AP filings. Users can search audit engagements by company, firm, or partner, or download the full dataset as a CSV file updated daily. Bulk downloads are timestamped in Eastern Time and do not include the ticker field.

Platforms

Web

Pricing

Free

Quick highlights

Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers.
Displays engagement partner details, audit firm name and location, and the extent of participation of other firms.
Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time.
Form AP filings are required for each audit of a public company, forming the core of the database.
Advanced search tools and a contact form are available for deeper queries and user support.

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Overlap

Shared focus areas

1 overlap

Both tools cover this research theme.

Regulatory Filings Monitoring

Where they differ

OTC Markets

Distinct strengths include:

Data APIs

Order Book / Level II

Real‑Time Level 1+ (inside bid/offer + trades) and Level 2+ (full quote book with market participant IDs) data products; Delayed Level 1+ on a 15‑minute basis; End‑of‑Day snapshots.
Level 2 quote montage specification (fields: MPID, price, QAP, size, time‑of‑update) and display requirements.
Reference & pricing files (security master with optional CUSIP), plus End‑of‑Day pricing files; secure SFTP delivery supported.
Disclosure API (REST, JSON/CSV/XML) with app‑key auth; filter by symbol/CUSIP/company; document retrieval; plan‑level rate‑limit guidance.

Feature-by-feature breakdown

Attribute	OTC Markets	PCAOB AuditorSearch
Categories Which research workflows each platform targets	Shared: Regulatory Filings Monitoring Unique: Data APIs, Order Book / Level II, News, Ticker Changes, Splits, Dividends, APIs & SDKs, Screeners	Shared: Regulatory Filings Monitoring
Asset types Supported asset classes and universes	Stocks, Bonds	Other
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web, API	Web
Pricing High-level pricing models	Free, Subscription	Free
Key features Core capabilities called out by each vendor	Unique Real‑Time Level 1+ (inside bid/offer + trades) and Level 2+ (full quote book with market participant IDs) data products; Delayed Level 1+ on a 15‑minute basis; End‑of‑Day snapshots. Level 2 quote montage specification (fields: MPID, price, QAP, size, time‑of‑update) and display requirements. Reference & pricing files (security master with optional CUSIP), plus End‑of‑Day pricing files; secure SFTP delivery supported. Disclosure API (REST, JSON/CSV/XML) with app‑key auth; filter by symbol/CUSIP/company; document retrieval; plan‑level rate‑limit guidance. Compliance & regulatory data: Blue Sky Data (state eligibility monitoring), Promotion Data file (Caveat Emptor/tier/share data), and Compliance Analytics (multi‑factor risk scoring). Coverage of OTC Link ATS via MIC 'OTCM'; OTC Link ATS/ECN/NQB each operate as SEC‑regulated ATSs.	Unique Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers. Displays engagement partner details, audit firm name and location, and the extent of participation of other firms. Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time. Form AP filings are required for each audit of a public company, forming the core of the database. Advanced search tools and a contact form are available for deeper queries and user support.
Tested Verified by hands-on testing inside Find My Moat	Not yet	Not yet
Editor pick Featured inside curated shortlists	Standard listing	Standard listing

Frequently Asked Questions

Which workflows do OTC Markets and PCAOB AuditorSearch both support?

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

Do OTC Markets and PCAOB AuditorSearch require subscriptions?

Both OTC Markets and PCAOB AuditorSearch keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access OTC Markets and PCAOB AuditorSearch?

Both OTC Markets and PCAOB AuditorSearch 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?

OTC Markets differentiates itself with Real‑Time Level 1+ (inside bid/offer + trades) and Level 2+ (full quote book with market participant IDs) data products; Delayed Level 1+ on a 15‑minute basis; End‑of‑Day snapshots., Level 2 quote montage specification (fields: MPID, price, QAP, size, time‑of‑update) and display requirements., and Reference & pricing files (security master with optional CUSIP), plus End‑of‑Day pricing files; secure SFTP delivery supported., whereas PCAOB AuditorSearch stands out for Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers., Displays engagement partner details, audit firm name and location, and the extent of participation of other firms., and Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time..

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