Head to head
Open-Meteo vs Tomorrow.io
As a weather API, Tomorrow.io rates higher on the APIbenchmarks Index, 82.6 to 79.3, a 3.3-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Open-Meteo | Tomorrow.io |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 79.3 | 82.6 |
Specifications
| Open-Meteo | Tomorrow.io | |
|---|---|---|
| Best for | Free open-source weather API | Enterprise weather intelligence |
| Free tier | 10k calls/day, no key (non-commercial) | Free plan (rate-limited daily/hourly/per-sec) |
| Pricing | Free non-commercial / per-call commercial | Per API call / tiered |
| Official SDKs | 7 languages | 8 languages |
Is Open-Meteo better than Tomorrow.io?
On the APIbenchmarks Index, Tomorrow.io rates higher (82.6 vs 79.3). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Tomorrow.io leads by 3.3 points (82.6 vs 79.3) and wins 2 of 4 criteria; Open-Meteo wins 2.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 82 | 88 | |
| Reliability | 66 | 85 | |
| Ecosystem & SDKs | 76 | 74 | |
| Accessibility | 96 | 82 |
Choose Open-Meteo if… / choose Tomorrow.io if…
- →ecosystem & sdks matters most to you (76 vs 74)
- →accessibility matters most to you (96 vs 82)
- →your use case matches its focus: free open-source weather api
- →documentation & dx matters most to you (88 vs 82)
- →reliability matters most to you (85 vs 66)
- →you need broad SDK coverage (8 official SDKs vs 7)
- →your use case matches its focus: enterprise weather intelligence
Pricing side by side
- Model
- Free non-commercial / per-call commercial
- Free tier
- 10k calls/day, no key (non-commercial)
- Free / Open-Access (non-commercial)$0
- API Standard$29/mo
- API Professional$99/mo
- API EnterpriseCustom (contact info@open-meteo.com)
- Model
- Per API call / tiered
- Free tier
- Free plan (rate-limited daily/hourly/per-sec)
- Free API Plan$0
- API Plan (paid)Usage-based / contact sales
- Platform PlanContact sales
Vendor-published pricing, verified 2026-06-27 (Open-Meteo) and 2026-06-27 (Tomorrow.io).
SDK and language coverage
Both · 3
PythonJavaR (community)
Only Open-Meteo · 4
TypeScriptSwiftKotlinDart (community)
Only Tomorrow.io · 5
REST API (HTTP)JavaScript / Node.js (official sample & widget repos)Go (code samples)Shell / cURLPostman collection
Strengths and weaknesses
- +No API key or account required for non-commercial use, a single HTTP GET returns JSON
- +Blends 30+ models from 15+ national weather services and auto-selects the best local high-res model per coordinate
- +Exceptionally broad data: forecast, historical (1940-present), marine, air quality, solar/PV, ensemble, seasonal, flood, climate
- –Model data only, no real station observations, so no validated actuals or hyperlocal radar nowcasting
- –Free tier rate limits (600/min, 5k/hr, 10k/day) frustrate some developers with bursty workloads
- –Commercial use legally requires a paid plan even at low volumes
- +60+ data layers far beyond core weather, air quality, pollen, lightning, fire, flood, solar, soil, maritime and aviation indices in one API
- +Unified Timeline endpoint returns realtime, forecast and historical in a single call, simplifying integration
- +Proprietary AI/ML forecasting fusing satellite, model and non-traditional data for hyperlocal results
- –Premium parameters and any real scale are gated behind 'contact sales' with no published paid per-call pricing
- –Forecast accuracy is location-dependent; consumer app users report sizable temperature errors in some areas
- –Reports of slow/unresponsive support on the consumer side
Open-Meteo vs Tomorrow.io: questions
- Which has better documentation, Open-Meteo or Tomorrow.io?
- Tomorrow.io scores higher on documentation and developer experience: 88 vs 82 out of 100.
- Which is more reliable, Open-Meteo or Tomorrow.io?
- Tomorrow.io scores higher on reliability: 85 vs 66 out of 100.
- Do Open-Meteo and Tomorrow.io have a free tier?
- Open-Meteo: yes (10k calls/day, no key (non-commercial)). Tomorrow.io: yes (Free plan (rate-limited daily/hourly/per-sec)).
- How are Open-Meteo and Tomorrow.io priced?
- Open-Meteo: Free non-commercial / per-call commercial. Tomorrow.io: Per API call / tiered.
- Which has more official SDKs?
- Tomorrow.io lists 8 official SDKs, Open-Meteo lists 7.