★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Source check: Changeflow (Trackly) checked August 4, 2026
Tool Comparison
Changeflow (Trackly) vs OpenCorporates
Start here
Changeflow (Trackly)
Free • From $1188/yr · Web · API · Other
- Delayed quotes won't cut it; you need real-time data
- You care about alerts, news, and insider data, things OpenCorporates doesn't offer
Pick OpenCorporates instead if
OpenCorporates
Free • Contact for pricing · Web · API
- You care about other, something Changeflow (Trackly) 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
Changeflow (Trackly) and OpenCorporates cover a lot of the same ground (2 shared categories, regulatory filings monitoring and APIs & data feeds), so for the basics you won't go far wrong with either. Changeflow (Trackly) simply does more: 10 categories to OpenCorporates's 3, including alerts, news, and insider data. OpenCorporates counters by being completely free.
What readers say
Changeflow (Trackly)
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OpenCorporates
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Key differences at a glance
- Real-time data
- Changeflow (Trackly)
- Free trial
- Changeflow (Trackly)30 days
- Broader coverage
- Changeflow (Trackly)10 vs 3 categories
- Asset coverage
- Changeflow (Trackly)Adds stocks
- 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 $1188/yr | Free • Contact for pricing |
Free tier | Yes | Yes |
Free trial | 30 days | — |
Plan limits | 17 limits: Free: sources: 3, Professional: sources: 100 +15 more | 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 | Slack, Microsoft Teams +5 more | OpenRefine |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | Institutional Investors, Analysts +3 more | — |
Categories covered | 10 | 3 |
Regions | North America, Europe, APAC | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | Latency: Real-time and Granularity: Minute and EOD | Latency: End of Day and Granularity: EOD |
Capabilities | AI summaries: Filings and News | — |
Security | Encryption in transit | Status page |
| Try it | Visit Changeflow (Trackly) | Visit OpenCorporates |
Where each one shines
What Changeflow (Trackly) and OpenCorporates each do best.ShowHide
Where each one shines
What Changeflow (Trackly) and OpenCorporates each do best.What Changeflow (Trackly) does best
- Support for setting up monitoring by pasting a URL and describing the changes you care about in natural language.
- AI summaries and relevance filtering to reduce noisy website-change alerts before an analyst reviews the source.
- Monitoring SEC filings, corporate disclosures, IR pages, regulator pages, policies, PDFs, RSS feeds, JSON, CSV, and other online sources.
- Tracking common EDGAR filing types such as 8-K, 10-K, 10-Q, Form 4, 13F, proxy statements, and S-1 pages where configured.
- Views for reviewing changes through dashboard alerts, email notifications, visual diffs, interactive change history, and saved source versions.
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 Changeflow (Trackly) and OpenCorporates, side by side.ShowHide
Every detail we compared
Every tracked attribute for Changeflow (Trackly) and OpenCorporates, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksOther | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Institutional InvestorsAnalystsQuants/DevelopersAsset ManagersHedge Funds | Not specified |
Regions | North AmericaEuropeAPAC | North AmericaEuropeAPACLatAmMiddle EastAfrica |
Coverage details | 4 countries | Not specified |
| Data | ||
Data freshness | Real-time | End of Day |
Data granularity | MinuteEOD | EOD |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKeyWebhooksDocs | Auth: APIKey |
Import methods | ManualCSV | Not specified |
Integrations | SlackMicrosoft TeamsDiscordZapierMake (Integromat)n8nRSS readers (e.g., Feedly, Inoreader) | OpenRefine |
Export formats | CSVJSON | CSVJSON |
| Plans & trust | ||
Security & compliance | Encryption in transit | Status page |
Capability signals | AI summaries: Filings and News | Not specified |
Vendor & support | Changeflow Limited (trading as Trackly)Country: United KingdomSupport: Email, Chat, and Phone | OpenCorporates LtdCountry: United KingdomFounded 2010Support: Email |
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 | Freesources: 3 | Free“Free (personal & public-benefit use)” |
| Entry paid plan | $1188/yr≈ $99/mo“Professional”sources: 100 · users: 2 · +6 more | £225/mo“Essentials (API)”api calls per month: 500 · api calls per day: 200 |
| Tier 2 | $2988/yr≈ $249/mo“Business”sources: 500 · users: 5 · +5 more | £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”minimum check frequency: Every 10 minutes | Contact sales“Enterprise Bulk (SFTP CSV datasets)” |
| Free trial | 30 days | — |
Questions we keep getting
What's the difference between Changeflow (Trackly) and OpenCorporates?
Changeflow (Trackly) leans toward alerts, news, and regulatory filings monitoring, while OpenCorporates puts more weight on APIs & data feeds, regulatory filings monitoring, and other. They overlap in 2 categories, so for most people it comes down to workflow preference and price.
How much do Changeflow (Trackly) and OpenCorporates cost?
Good news: both Changeflow (Trackly) and OpenCorporates have free plans, so you can run them side by side and only pay if you hit a wall.
Do Changeflow (Trackly) 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 Changeflow (Trackly) or OpenCorporates?
It depends on what you're after. Pick Changeflow (Trackly) if alerts and news matter to you; go with OpenCorporates if you'd rather have other. And if you only need the basics both share, let price decide.
What asset classes do Changeflow (Trackly) and OpenCorporates cover?
Both cover other. Changeflow (Trackly) also handles stocks.
Does Changeflow (Trackly) or OpenCorporates have real-time data?
Changeflow (Trackly) offers real-time data, which matters if you trade actively. OpenCorporates runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Can I export data from Changeflow (Trackly) and OpenCorporates?
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.