★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool comparison edition
Tool Comparison
OpenCorporates vs Similarweb
Pick OpenCorporates if
OpenCorporates
Free • Contact for pricing · Web · API
- You care about regulatory filings monitoring and other, things Similarweb doesn't offer
Pick Similarweb if
Similarweb
Free • Contact for pricing · Web · API
- You care about app & website traffic, sheets / excel add-ins, and data visualizations, things OpenCorporates doesn't offer
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
The real difference is focus: only OpenCorporates gives you regulatory filings monitoring and other, and only Similarweb gives you 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
Vote once to reveal the community verdict.
Similarweb
Vote once to reveal the community verdict.
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • Contact for pricing | Free • Contact for pricing |
Free tier | Yes | Yes |
Free trial | — | — |
Plan limits | 8 limits: Essentials (API): api calls per month: 500, Essentials (API): api calls per day: 200 +6 more | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | Yes | Yes |
Broker sync | No | — |
Integrations | OpenRefine | Microsoft Excel, Google Sheets +8 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 | Latency: End of Day and Granularity: EOD |
Security | Status page | SOC2 and ISO27001 |
| Try it | Visit OpenCorporates | Visit Similarweb |
Where each one shines
What OpenCorporates and Similarweb each do best.ShowHide
Where each one shines
What OpenCorporates and Similarweb each do best.What OpenCorporates does best
- Search tools across a public legal-entity database advertised at 200M+ company records aggregated from official registries with provenance and source links.
- The versioned REST API with API-key authentication and JSON or XML output for company and officer data workflows.
- OpenRefine Reconciliation API to match company names to legal identifiers during entity-resolution work.
- Access to enterprise bulk data through SFTP-delivered CSV datasets for companies, officers, addresses, alternative names, identifiers, and relationships.
- Relationship data for subsidiaries, branches, control statements, shareholdings, and ownership-mapping workflows.
What Similarweb does best
- Analysis of website traffic, engagement, channels, keyword demand, referral sources, competitors, company profiles, technologies, and app intelligence where plan access allows.
- Free public tools for high-level samples such as traffic checks, app analytics, keyword tools, top websites or apps, and company or technology profiles.
- Similarweb API V5 in REST or Batch mode with API-key authentication, standardized responses, multi-metric requests, MCP and AI support, and one key across endpoint families.
- Subscriptions to daily or monthly release notifications through webhooks where API workflow access is available.
- Export support for data through no-code Data Exporter, scheduled email delivery, CSV downloads, dashboards, tables, Excel, PDF, PPT, and PNG formats depending on product access.
Every detail we compared
Every tracked attribute for OpenCorporates and Similarweb, side by side.ShowHide
Every detail we compared
Every tracked attribute for OpenCorporates and Similarweb, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Other | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEuropeAPACLatAmMiddle EastAfrica | North AmericaEuropeAPACLatAmMiddle EastAfrica |
| Data | ||
Data freshness | End of Day | End of Day |
Data granularity | EOD | EOD |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKey | Auth: APIKeyWebhooks |
Import methods | Not specified | CSV |
Integrations | OpenRefine | Microsoft ExcelGoogle SheetsGoogle Looker StudioTableauPower BISnowflakeDatabricksSalesforce+2 more |
Export formats | CSVJSON | CSVExcelJSONPDFImage |
| Plans & trust | ||
Security & compliance | Status page | SOC2ISO27001 |
Vendor & support | OpenCorporates LtdCountry: United KingdomFounded 2010Support: Email | Similarweb Ltd.Support: Email |
Curation ratings | Not specified | Methodology 4/5Reliability 4/5UX 4/5 |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| 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 | Subscription“Self-service packages” |
| Tier 2 | £660/mo“Starter (API)”api calls per month: 2,500 · api calls per day: 500 · +1 more | — |
| Top plan | £1200/mo“Basic (API)”api calls per month: 5,000 · api calls per day: 1,000 · +1 more | — |
| Custom / enterprise | Contact sales“Enterprise Bulk (SFTP CSV datasets)” | Contact sales“Business and Enterprise” |
Questions we keep getting
What's the difference between OpenCorporates and Similarweb?
OpenCorporates leans toward APIs & data feeds, regulatory filings monitoring, and other, while Similarweb 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 Similarweb cost?
Good news: both OpenCorporates and Similarweb have free plans, so you can run them side by side and only pay if you hit a wall.
Do OpenCorporates and Similarweb 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 Similarweb?
It depends on what you're after. Pick OpenCorporates if regulatory filings monitoring and other matter to you; go with Similarweb 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 Similarweb?
Yes, both export to spreadsheets (CSV), which is handy if you like running your own numbers.
Keep researching
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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.