VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View OpenCorporates View Semrush Back to Home

Head-to-head

OpenCorporates vs Semrush comparison

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

Quick takeaways

OpenCorporates adds Regulatory Filings Monitoring, and Other coverage that Semrush skips.

Semrush includes App & Website Traffic, APIs & SDKs, Sheets / Excel Add-ins, and Blogs categories that OpenCorporates omits.

OpenCorporates highlights: 230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links., Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day)., and OpenRefine Reconciliation API allows entity-matching from company names to legal identifiers..

Semrush is known for: Traffic Analytics tools to examine any website’s visitors, sources, engagement metrics, and competitive benchmarks., Rich API suite: Analytics and Projects APIs (Business plan), Trends API, Listing Management, and Map Rank Tracker. Current versions support API key (v3) and OAuth 2.0 with JSON (v4)., and API consumption billed in ‘units’ per request or per line of data. Historical queries cost more; some APIs like Listing Management and Map Rank Tracker are excluded from unit billing..

Semrush offers mobile access, which OpenCorporates skips.

OpenCorporates

opencorporates.com

The world’s largest open database of legal entities, offering both a public-facing search and an API. Free access is available for personal or public-benefit use, while commercial API access and bulk datasets require a paid plan. Bulk deliveries are provided via SFTP in CSV format, and the platform includes a public status page for web, API, knowledge base, and SFTP availability.

Platforms

Web

API

Pricing

Free

Subscription

Quick highlights

230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links.
Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day).
OpenRefine Reconciliation API allows entity-matching from company names to legal identifiers.
Enterprise bulk access via SFTP, with six structured CSV datasets (Companies, Officers, Non-Registered Addresses, Alternative Names, Additional Identifiers, and Relationships).
Relationships dataset includes 30M+ links covering subsidiaries, branches, control statements, and shareholdings, with data from sources like the SEC and UK PSC.

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Semrush

semrush.com

Comprehensive SEO, marketing, and web traffic analytics platform. API access for core Analytics and Projects requires a Business plan, with usage billed in API units. Some APIs—like Listing Management and Map Rank Tracker—don’t consume units. Enterprise security options include SAML SSO on Guru and Business tiers. A 7-day free trial is available for all paid plans.

Platforms

Web

Mobile

API

Pricing

Free

Subscription

Quick highlights

Traffic Analytics tools to examine any website’s visitors, sources, engagement metrics, and competitive benchmarks.
Rich API suite: Analytics and Projects APIs (Business plan), Trends API, Listing Management, and Map Rank Tracker. Current versions support API key (v3) and OAuth 2.0 with JSON (v4).
API consumption billed in ‘units’ per request or per line of data. Historical queries cost more; some APIs like Listing Management and Map Rank Tracker are excluded from unit billing.
Flexible exports in CSV, Excel, and PDF across tools. Position Tracking and Site Audit modules generate PDF reports; Position Tracking also supports direct Google Sheets export.
Google Sheets integration through the App Center ‘AI Automated Data Connector’ for automated reporting pipelines.

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Overlap

Shared focus areas

1 overlap

Both tools cover this research theme.

Data APIs

Where they differ

OpenCorporates

Distinct strengths include:

Regulatory Filings Monitoring

Other

230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links.
Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day).
OpenRefine Reconciliation API allows entity-matching from company names to legal identifiers.
Enterprise bulk access via SFTP, with six structured CSV datasets (Companies, Officers, Non-Registered Addresses, Alternative Names, Additional Identifiers, and Relationships).

Semrush

Distinct strengths include:

App & Website Traffic

APIs & SDKs

Sheets / Excel Add-ins

Blogs

Traffic Analytics tools to examine any website’s visitors, sources, engagement metrics, and competitive benchmarks.
Rich API suite: Analytics and Projects APIs (Business plan), Trends API, Listing Management, and Map Rank Tracker. Current versions support API key (v3) and OAuth 2.0 with JSON (v4).
API consumption billed in ‘units’ per request or per line of data. Historical queries cost more; some APIs like Listing Management and Map Rank Tracker are excluded from unit billing.
Flexible exports in CSV, Excel, and PDF across tools. Position Tracking and Site Audit modules generate PDF reports; Position Tracking also supports direct Google Sheets export.

Feature-by-feature breakdown

Attribute	OpenCorporates	Semrush
Categories Which research workflows each platform targets	Shared: Data APIs Unique: Regulatory Filings Monitoring, Other	Shared: Data APIs Unique: App & Website Traffic, APIs & SDKs, Sheets / Excel Add-ins, Blogs
Asset types Supported asset classes and universes	Other	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, Mobile, API
Pricing High-level pricing models	Free, Subscription	Free, Subscription
Key features Core capabilities called out by each vendor	Unique 230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links. Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day). OpenRefine Reconciliation API allows entity-matching from company names to legal identifiers. Enterprise bulk access via SFTP, with six structured CSV datasets (Companies, Officers, Non-Registered Addresses, Alternative Names, Additional Identifiers, and Relationships). Relationships dataset includes 30M+ links covering subsidiaries, branches, control statements, and shareholdings, with data from sources like the SEC and UK PSC. Data acquisition ranges from hourly to quarterly; registry ingestion checks run every 5 minutes. Bulk deliveries are typically no more than one month behind official registries.	Unique Traffic Analytics tools to examine any website’s visitors, sources, engagement metrics, and competitive benchmarks. Rich API suite: Analytics and Projects APIs (Business plan), Trends API, Listing Management, and Map Rank Tracker. Current versions support API key (v3) and OAuth 2.0 with JSON (v4). API consumption billed in ‘units’ per request or per line of data. Historical queries cost more; some APIs like Listing Management and Map Rank Tracker are excluded from unit billing. Flexible exports in CSV, Excel, and PDF across tools. Position Tracking and Site Audit modules generate PDF reports; Position Tracking also supports direct Google Sheets export. Google Sheets integration through the App Center ‘AI Automated Data Connector’ for automated reporting pipelines. Native integrations with Google Analytics and Google Search Console to combine marketing and search performance data.
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 OpenCorporates and Semrush both support?

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

Do OpenCorporates and Semrush require subscriptions?

Both OpenCorporates and Semrush keep freemium access with optional paid upgrades, so you can trial each platform before committing.

Which tool has mobile access?

Semrush ships a dedicated mobile experience, while OpenCorporates focuses on web or desktop access.

What unique strengths set the two platforms apart?

OpenCorporates differentiates itself with 230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links., Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day)., and OpenRefine Reconciliation API allows entity-matching from company names to legal identifiers., whereas Semrush stands out for Traffic Analytics tools to examine any website’s visitors, sources, engagement metrics, and competitive benchmarks., Rich API suite: Analytics and Projects APIs (Business plan), Trends API, Listing Management, and Map Rank Tracker. Current versions support API key (v3) and OAuth 2.0 with JSON (v4)., and API consumption billed in ‘units’ per request or per line of data. Historical queries cost more; some APIs like Listing Management and Map Rank Tracker are excluded from unit billing..

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