★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Source check: Diffchecker checked August 4, 2026
Tool Comparison
Diffchecker vs OpenCorporates
Pick Diffchecker if
Diffchecker
Free • From $15/mo · Web · Desktop · API
- You care about diff view, something OpenCorporates doesn't offer
Pick OpenCorporates if
OpenCorporates
Free • Contact for pricing · Web · API
- You care about regulatory filings monitoring and other, things Diffchecker doesn't offer
Skip both if: Neither one clicks with how you research; there are strong third options.
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Our take
The bottom line
The real difference is focus: only Diffchecker gives you diff view, and only OpenCorporates gives you regulatory filings monitoring and other. On paper they're closely matched, so let pricing, platform fit, and the details below break the tie.
What readers say
Diffchecker
Vote once to reveal the community verdict.
OpenCorporates
Vote once to reveal the community verdict.
Key differences at a glance
- Free trial
- Diffchecker14 days
- Desktop app
- Diffchecker
- Free plan
- Both
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 • From $15/mo | Free • Contact for pricing |
Free tier | Yes | Yes |
Free trial | 14 days | — |
Plan limits | API Free: requests per month: 50 and API Free: max request size: 5 MB | 8 limits: Essentials (API): api calls per month: 500, Essentials (API): api calls per day: 200 +6 more |
| Platforms & access | ||
Web app | Yes | Yes |
Desktop app | Yes | No |
Mobile app | No | No |
API access | Yes | Yes |
Broker sync | — | No |
Integrations | iManage | OpenRefine |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 2 | 3 |
Regions | — | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | — | Latency: End of Day and Granularity: EOD |
Security | SSO: SAML | Status page |
| Try it | Visit Diffchecker | Visit OpenCorporates |
Where each one shines
What Diffchecker and OpenCorporates each do best.ShowHide
Where each one shines
What Diffchecker and OpenCorporates each do best.What Diffchecker does best
- Comparison tools for text, Word documents, PDFs, Excel files, images, and folders from a web interface.
- Diffchecker can be used to review changed filing language, revised research notes, spreadsheet edits, model outputs, term sheets, or diligence documents.
- Tools for running desktop comparisons when confidential files should stay offline instead of being uploaded to the web app.
- Redline views, diff merging, real-time text comparison, dark mode, and PDF export on the plans that include them.
- AI difference summaries on eligible paid plans to speed up review before reading the source changes yourself.
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.
Every detail we compared
Every tracked attribute for Diffchecker and OpenCorporates, side by side.ShowHide
Every detail we compared
Every tracked attribute for Diffchecker and OpenCorporates, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Other | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | Not specified | North AmericaEuropeAPACLatAmMiddle EastAfrica |
| Data | ||
Data freshness | Not specified | End of Day |
Data granularity | Not specified | EOD |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKey | Auth: APIKey |
Integrations | iManage | OpenRefine |
Export formats | PDF | CSVJSON |
| Plans & trust | ||
Security & compliance | SSO: SAML | Status page |
Vendor & support | Checker Software Inc.Country: CanadaSupport: Email | OpenCorporates LtdCountry: United KingdomFounded 2010Support: Email |
Curation ratings | Methodology 3/5Reliability 4/5UX 4/5 | Not specified |
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“Basic” | Free“Free (personal & public-benefit use)” |
| Entry paid plan | $15/mo“Pro + Desktop” | £225/mo“Essentials (API)”api calls per month: 500 · api calls per day: 200 |
| Tier 2 | $20/mo“Legal” | £660/mo“Starter (API)”api calls per month: 2,500 · api calls per day: 500 · +1 more |
| Tier 3 | $40/mo“Enterprise” | £1200/mo“Basic (API)”api calls per month: 5,000 · api calls per day: 1,000 · +1 more |
| Tier 4 | $99/mo“API Standard” | — |
| Top plan | $299/mo“API Business” | — |
| Custom / enterprise | Contact sales“API Enterprise” | Contact sales“Enterprise Bulk (SFTP CSV datasets)” |
| Free trial | 14 days | — |
Questions we keep getting
What's the difference between Diffchecker and OpenCorporates?
Diffchecker leans toward diff view and APIs & data feeds, while OpenCorporates puts more weight on APIs & data feeds, regulatory filings monitoring, and other. They overlap in 1 categories, so for most people it comes down to workflow preference and price.
How much do Diffchecker and OpenCorporates cost?
Good news: both Diffchecker and OpenCorporates have free plans, so you can run them side by side and only pay if you hit a wall.
Do Diffchecker and OpenCorporates have APIs?
Yes, both offer API access, so developers and quants can pull data programmatically or wire up their own integrations.
Should I choose Diffchecker or OpenCorporates?
It depends on what you're after. Pick Diffchecker if diff view matter to you; go with OpenCorporates if you'd rather have regulatory filings monitoring and other. And if you only need the basics both share, let price decide.
Can I export data from Diffchecker and OpenCorporates?
OpenCorporates exports to CSV. Diffchecker is stingier about getting data out.
Keep researching
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Feedback
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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.