★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool comparison edition
Tool Comparison
Firefly III vs OpenCorporates
Pick Firefly III if
Firefly III
Free · Web · API
- You care about portfolio and webhooks, things OpenCorporates doesn't offer
Pick OpenCorporates if
OpenCorporates
Free • Contact for pricing · Web · API
- You care about regulatory filings monitoring, something Firefly III 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
Firefly III and OpenCorporates cover a lot of the same ground (2 shared categories, APIs & data feeds and other), so for the basics you won't go far wrong with either. The real difference is focus: only Firefly III gives you portfolio and webhooks, and only OpenCorporates gives you regulatory filings monitoring.
What readers say
Firefly III
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OpenCorporates
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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 | 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 | No |
Integrations | Salt Edge, GoCardless +2 more | OpenRefine |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 4 | 3 |
Regions | — | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | — | Latency: End of Day and Granularity: EOD |
Security | — | Status page |
| Try it | Visit Firefly III | Visit OpenCorporates |
Where each one shines
What Firefly III and OpenCorporates each do best.ShowHide
Where each one shines
What Firefly III and OpenCorporates each do best.What Firefly III does best
- Self-host a personal finance ledger under the AGPLv3 open-source license rather than using a hosted budgeting app.
- Tracking accounts and transactions with double-entry bookkeeping, budgets, categories, tags, recurring transactions, subscriptions, piggy banks, rules, and reporting.
- The JSON REST API with OAuth2, personal access tokens, and a full OpenAPI specification for dashboards, automations, and personal analytics.
- Optional event webhooks for transaction create, update, and delete events when enabled through environment configuration.
- Import support for transaction data through the separate Firefly III Data Importer, CSV and CAMT.053 files, and optional providers such as Salt Edge, GoCardless, and SimpleFIN.
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 Firefly III and OpenCorporates, side by side.ShowHide
Every detail we compared
Every tracked attribute for Firefly III 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: OAuth2 and APIKeyWebhooks | Auth: APIKey |
Import methods | CSVManual | Not specified |
Integrations | Salt EdgeGoCardlessSimpleFINSlack | OpenRefine |
Export formats | CSV | CSVJSON |
| Plans & trust | ||
Security & compliance | Not specified | Status page |
Vendor & support | Firefly III (open-source project)Support: Email | OpenCorporates LtdCountry: United KingdomFounded 2010Support: Email |
Curation ratings | Methodology 4/5Reliability 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 | Free“Free (personal & public-benefit use)” |
| Entry paid plan | — | £225/mo“Essentials (API)”api calls per month: 500 · api calls per day: 200 |
| 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)” |
Questions we keep getting
What's the difference between Firefly III and OpenCorporates?
Firefly III leans toward portfolio, APIs & data feeds, and webhooks, 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 Firefly III and OpenCorporates cost?
Good news: both Firefly III and OpenCorporates have free plans, so you can run them side by side and only pay if you hit a wall.
Do Firefly III 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 Firefly III or OpenCorporates?
It depends on what you're after. Pick Firefly III if portfolio and webhooks matter to you; go with OpenCorporates if you'd rather have regulatory filings monitoring. And if you only need the basics both share, let price decide.
Can I export data from Firefly III and OpenCorporates?
Yes, both export to spreadsheets (CSV), which is handy if you like running your own numbers.
Can I track my portfolio with Firefly III or OpenCorporates?
Firefly III handles portfolio tracking. OpenCorporates is really a research tool; you'd track your portfolio elsewhere.
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.