Best SIX Financial Data APIs Alternatives in 2026
The top SIX Financial Data APIs alternatives are Massive (formerly Polygon.io), EODHD and Alpha Vantage: 15 apis data services our editors would look at instead of SIX Financial Data APIs, in our ranking order.
SIX Financial Data APIs: Programmatic SIX financial-data access for organizations integrating datasets into their applications. Where it falls short: commercial terms are handled through contact with sales.
Switching from SIX Financial Data APIs? For most apis data services buyers the best SIX Financial Data APIs alternative is Massive (formerly Polygon.io), built for developers needing broad financial market data. On a budget, Profit.com Data API starts at $16/mo. The Weather Company Data API offers the most monthly request limit (1e+06 requests/mo).
Why People Look for an SIX Financial Data APIs Alternative
- Commercial terms are handled through contact with sales
- Organizations depend on SIX data and its available datasets
- Public support information centers on documentation
Quick Picks by What You Need
- Best overallMassive (formerly Polygon.io)8.8
Developers needing broad financial market data
Visit Massive (formerly Polygon.io) - Lowest priceProfit.com Data API8.2
Paid plans from $16/mo
Visit Profit.com Data API - Best free optionMassive (formerly Polygon.io)8.8
Has a free plan
Visit Massive (formerly Polygon.io) - Most monthly request limitThe Weather Company Data API7.8
1e+06 requests/mo
Visit The Weather Company Data API
All 15 SIX Financial Data APIs Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forDevelopers needing broad financial market data
- Better than SIX Financial Data APIs:
- Editor score 8.8 vs 6.5
Broad market data with REST, streaming, and bulk downloads for developer-built finance products.
- Official SDKs
- Historical data
8.8/10★★★★☆Visit Massive -
Best forTeams needing broad financial data and integrations
- Better than SIX Financial Data APIs:
- Editor score 8.7 vs 6.5
A broad REST data API for teams combining market prices, fundamentals, news, and screening.
- Official SDKs
- Historical data
8.7/10★★★★☆Visit EODHD -
Best forDevelopers seeking equities, forex, and crypto data
- Better than SIX Financial Data APIs:
- Editor score 8.5 vs 6.5
A REST API for global market data, with historical equities and technical indicators.
- Official SDKs
- Historical data
8.5/10★★★★☆Visit Alpha Vantage -
Best forReal-time stock data and financial fundamentals
- Better than SIX Financial Data APIs:
- Editor score 8.4 vs 6.5
Financial-data APIs spanning real-time prices, fundamentals, news, and historical market data.
- Historical data
8.4/10★★★★☆Visit Finnhub -
Best forBudget-conscious users of market and fundamentals APIs
- Better than SIX Financial Data APIs:
- Editor score 8.2 vs 6.5
A broad financial data API with free access and paid personal-use plans from $16 monthly.
- Historical data
8.2/10★★★★☆Visit Profit.com -
Best forTeams needing SDK-rich equity and options data
- Better than SIX Financial Data APIs:
- Editor score 8.1 vs 6.5
Equity and options data with multiple API access paths, starting at $150 per month.
- Official SDKs
- Historical data
8.1/10★★★★☆Visit Intrinio -
Best forTeams enriching and searching person or company records
- Better than SIX Financial Data APIs:
- Editor score 8.0 vs 6.5
A broad enrichment and search toolkit for teams building data-driven workflows.
8.0/10★★★★☆Try People Data Labs -
Best forDevelopers needing free, open-source weather data
- Better than SIX Financial Data APIs:
- Editor score 7.9 vs 6.5
A no-key weather API for developers who need broad data coverage at no cost for non-commercial use.
- Historical data
7.9/10★★★★☆Visit Open-Meteo -
Best forEnterprises needing comprehensive weather services
- Better than SIX Financial Data APIs:
- Editor score 7.8 vs 6.5
A broad weather API for teams that need forecasts, alerts and historical data.
- Historical data
7.8/10★★★★☆Visit site -
Best forTeams needing historical, forecast, and alert weather data
- Better than SIX Financial Data APIs:
- Editor score 7.7 vs 6.5
A weather data API with historical records, forecasts, alerts, and browser visualization.
- Historical data
7.7/10★★★★☆Visit site -
Best forApple-platform teams building weather applications
- Better than SIX Financial Data APIs:
- Editor score 7.6 vs 6.5
A weather data API for Apple-platform teams, with REST access for other platforms.
- Official SDKs
- Historical data
7.6/10★★★★☆Try Apple WeatherKit -
Best forTeams needing IP geolocation and threat detection
- Better than SIX Financial Data APIs:
- Editor score 7.5 vs 6.5
IPinfo pairs broad IP intelligence with a free tier and paid privacy detection.
7.5/10★★★★☆Visit IPinfo -
Best forDevelopers needing currency rates and conversions
- Better than SIX Financial Data APIs:
- Editor score 7.4 vs 6.5
A straightforward JSON API for exchange rates, with historical queries and paid-tier conversion tools.
- Historical data
7.4/10★★★★☆Visit site -
Best forApps needing straightforward exchange-rate lookups
- Better than SIX Financial Data APIs:
- Editor score 7.2 vs 6.5
A focused REST API for live and historical exchange-rate lookups.
- Historical data
7.2/10★★★★☆Visit Abstract API -
Best forResearchers accessing climate and weather datasets
- Better than SIX Financial Data APIs:
- Editor score 7.1 vs 6.5
A free REST API for querying climate datasets, observations, stations, and locations.
- Historical data
7.1/10★★★★☆Visit NOAA NCEI
SIX Financial Data APIs Alternatives: Common Questions
What is the best alternative to SIX Financial Data APIs?
Massive (formerly Polygon.io): #1 in our Apis Data Services ranking, with an editor score of 8.8 out of 10. Broad market data with REST, streaming, and bulk downloads for developer-built finance products.
Is there a free alternative to SIX Financial Data APIs?
Yes. Massive (formerly Polygon.io), EODHD, Alpha Vantage, Finnhub and Profit.com Data API have a free plan or a free tier (13 of the 15 alternatives on this page).
What is the cheapest paid alternative to SIX Financial Data APIs?
Of the alternatives here that publish a price, Profit.com Data API starts lowest, at $16/mo.
Why do people look for SIX Financial Data APIs alternatives?
Commercial terms are handled through contact with sales; Organizations depend on SIX data and its available datasets; Public support information centers on documentation.
Which SIX Financial Data APIs alternative has the most monthly request limit?
The Weather Company Data API, with 1e+06 requests/mo.
How do I switch from SIX Financial Data APIs?
Export your data from SIX Financial Data APIs (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel SIX Financial Data APIs.
How to Switch from SIX Financial Data APIs
- Export your data from SIX Financial Data APIs (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel SIX Financial Data APIs.
SIX Financial Data APIs vs Each Alternative
| # | Tool | Free plan | Paid from | API style | Historical data | Score |
|---|---|---|---|---|---|---|
| 18 | SIX Financial Data APIs | 6.5 | ||||
| 1 | Massive (formerly Polygon.io) | Yes | $29/mo | Rest | Yes | 8.8 |
| 2 | EODHD | Yes | Rest | Yes | 8.7 | |
| 3 | Alpha Vantage | Yes | Rest | Yes | 8.5 | |
| 4 | Finnhub | Yes | Rest | Yes | 8.4 | |
| 5 | Profit.com Data API | Yes | $16/mo | Rest | Yes | 8.2 |
| 6 | Intrinio | No | $150/mo | Rest | Yes | 8.1 |
| 7 | People Data Labs | Yes | 8.0 | |||
| 8 | Open-Meteo | Yes | Yes | 7.9 | ||
| 9 | The Weather Company Data API | No | Rest | Yes | 7.8 | |
| 10 | Visual Crossing Weather | Yes | Yes | 7.7 | ||
| 11 | Apple WeatherKit | Yes | Rest | Yes | 7.6 | |
| 12 | IPinfo | Yes | $26/mo | 7.5 | ||
| 13 | Open Exchange Rates | Yes | $120/yr | Rest | Yes | 7.4 |
| 14 | Abstract API Exchange Rate API | Yes | Rest | Yes | 7.2 | |
| 15 | NOAA NCEI Web Services | Yes | Free | Rest | Yes | 7.1 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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