Tool Comparison
OpenCorporates vs Semrush
- Paid from
- On request
- Free plan
- Yes
- Platforms
- Web, API
Best if
- You want regulatory filings monitoring and other.
- Paid from
- $139/mo
- Free plan
- Yes
- Platforms
- Web, Mobile, API
Best if
- You do a lot of your research from your phone
- You want app & website traffic, sheets / excel add-ins, and blogs.
Pick OpenCorporates if
OpenCorporates
Free • Contact for pricing · Web · API
- You want regulatory filings monitoring and other.
Pick Semrush if
Semrush
Free • From $139/mo · Web · Mobile · API
- You do a lot of your research from your phone
- You want app & website traffic, sheets / excel add-ins, and blogs.
Skip both if: Neither one clicks with how you research; there are strong third options.
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Our take
The bottom line
OpenCorporates includes regulatory filings monitoring and other, and Semrush includes app & website traffic and sheets / excel add-ins. On paper they're closely matched, so let pricing, platform fit, and the details below break the tie.
What readers say
OpenCorporates
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Key differences at a glance
- Mobile app
- Semrush
- Free trial
- Semrush7 days
- Free plan
- Both
What OpenCorporates does best
- Search more than 200 million company records collected from official sources, with provenance and source links.
- Use a versioned REST API with API-key authentication and JSON or XML output for company and officer data.
- Match company names to legal identifiers with the OpenRefine Reconciliation API.
- Receive bulk CSV datasets through SFTP for companies, officers, addresses, alternative names, identifiers, and relationships.
- Map subsidiaries, branches, control statements, and shareholdings with the relationships dataset.
What Semrush does best
- Analysis of website traffic, visitor sources, engagement, keywords, competitors, backlinks, SEO performance, paid search, and market benchmarks.
- Semrush One and AI visibility products to monitor brand and content visibility across AI search and classic SEO workflows.
- The Standard API for eligible SEO Toolkit Business users, with separately purchased API units and request or line-based consumption.
- Separate API paths for Trends, Listing Management, and Map Rank Tracker, noting that local APIs and map rank APIs have their own access and billing rules.
- Export support for data and reports through CSV, Excel, PDF, JSON, Google Sheets, Position Tracking, Site Audit, and App Center connector workflows.
Side by side
Pricing comparison
See for yourself
Side by side
Price, platforms, data, and market coverage.ShowHide
Side by side
| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • Contact for pricing | Free • From $139/mo |
Free tier | Yes | Yes |
Free trial | — | 7 days |
Plan limits | 9 limits: Essentials (API): api calls per month: 500, Essentials (API): api calls per day: 200 +7 more | 8 limits: SEO: websites: 5, SEO: tracked keywords daily: 500 +6 more |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | Yes |
API access | Yes | Yes |
Broker sync | No | — |
Integrations | OpenRefine | Google Analytics, Google Search Console +1 more |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 3 | 4 |
Regions | North America, Europe, APAC, LatAm, Middle East, Africa | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | Latency: End of Day and Granularity: EOD | — |
Security | Status page | Data residency: US and SSO: SAML |
| Try it | Visit OpenCorporates | Visit Semrush |
Standout features
The best features of OpenCorporates and Semrush.ShowHide
Standout features
What OpenCorporates does best
- Search more than 200 million company records collected from official sources, with provenance and source links.
- Use a versioned REST API with API-key authentication and JSON or XML output for company and officer data.
- Match company names to legal identifiers with the OpenRefine Reconciliation API.
- Receive bulk CSV datasets through SFTP for companies, officers, addresses, alternative names, identifiers, and relationships.
- Map subsidiaries, branches, control statements, and shareholdings with the relationships dataset.
What Semrush does best
- Analysis of website traffic, visitor sources, engagement, keywords, competitors, backlinks, SEO performance, paid search, and market benchmarks.
- Semrush One and AI visibility products to monitor brand and content visibility across AI search and classic SEO workflows.
- The Standard API for eligible SEO Toolkit Business users, with separately purchased API units and request or line-based consumption.
- Separate API paths for Trends, Listing Management, and Map Rank Tracker, noting that local APIs and map rank APIs have their own access and billing rules.
- Export support for data and reports through CSV, Excel, PDF, JSON, Google Sheets, Position Tracking, Site Audit, and App Center connector workflows.
All details
Every attribute we track for OpenCorporates and Semrush.ShowHide
All details
| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Other | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEuropeAPACLatAmMiddle EastAfrica | North AmericaEuropeAPACLatAmMiddle EastAfrica |
| Data | ||
Data freshness | End of Day | Not specified |
Data granularity | EOD | Not specified |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKey | Auth: APIKey and OAuth2 |
Integrations | OpenRefine | Google AnalyticsGoogle Search ConsoleGoogle Sheets |
Export formats | CSVJSON | CSVExcelPDFJSON |
| Plans & trust | ||
Security & compliance | Status page | Data residency: USSSO: SAML |
Vendor & support | OpenCorporates LtdCountry: United KingdomFounded 2010Support: Email | Semrush Inc.Country: United StatesSupport: Email |
Curation ratings | Not specified | Methodology 4/5Reliability 4/5UX 4/5 |
Green tags are exclusive to that tool in this comparison.
Pricing
Plans, billing, free trials, and monthly prices.ShowHide
Pricing
| Tier | ||
|---|---|---|
| Free plan | Free“Free (personal & public-benefit use)” | Free |
| Entry paid plan | £225/mo“Essentials (API)”api calls per month: 500 · api calls per day: 200 · +1 more | $139/mo“SEO”websites: 5 · tracked keywords daily: 500 |
| Tier 2 | £660/mo“Starter (API)”api calls per month: 2,500 · api calls per day: 500 · +1 more | $199/mo“Starter”websites: 5 · tracked keywords daily: 500 · +1 more |
| Tier 3 | £1200/mo“Basic (API)”api calls per month: 5,000 · api calls per day: 1,000 · +1 more | $299/mo“Pro+”websites: 15 · tracked keywords daily: 1,500 · +1 more |
| Top plan | — | $549/mo“Advanced” |
| Custom / enterprise | Contact sales“Enterprise Bulk (SFTP CSV datasets)” | Contact sales“Enterprise” |
| Free trial | — | 7 days |
Alternatives
Free alternatives
Questions we keep getting
What's the difference between OpenCorporates and Semrush?
OpenCorporates leans toward APIs & data feeds, regulatory filings monitoring, and other, while Semrush puts more weight on app & website traffic, APIs & data feeds, and sheets / excel add-ins. They overlap in 1 categories, so for most people it comes down to workflow preference and price.
How much do OpenCorporates and Semrush cost?
Good news: both OpenCorporates and Semrush have free plans, so you can run them side by side and only pay if you hit a wall.
Can I use OpenCorporates or Semrush on my phone?
Semrush lists a dedicated mobile app, so it travels better. OpenCorporates doesn't list a dedicated mobile app; its documented access is web and API.
Do OpenCorporates and Semrush have APIs?
Yes, both offer API access, so developers and quants can pull data programmatically or wire up their own integrations.
Should I choose OpenCorporates or Semrush?
It depends on what you're after. Pick OpenCorporates if regulatory filings monitoring and other matter to you; go with Semrush if you'd rather have app & website traffic and sheets / excel add-ins. And if you only need the basics both share, let price decide.
Can I export data from OpenCorporates and Semrush?
Yes, both export to spreadsheets (CSV), which is handy if you like running your own numbers.
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Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.