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Alpha VantageIntrinioXigniteIEX CloudQuandl
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NotesFree key is limited to 500 calls/dayFree trial restricted to DOW 30, and only certain data14 day free trial, with restricted useIEX Cloud has pays *per message*. Each API call counts for a different number of messages, to check, you can call their API to ask how much an API call will costNo real time
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Pricing MethodAPI call/minutePer packagePer PackagePer Message*Per Package
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Data Diversity* (Subjective)MediumMediumHighMediumHigh
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Cost: 1 year of BRK.A EOD historical pricesFree $40/month $875/month*Free
~12,500 messages		$39/month
$31.25/month (w/ annual)
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Cost: 20 years of BRK.A EOD historical pricesFree $40/month *only goes back to 2007*$875/month*Free
- Only 15 years
- 15 years of 1 stocks is about 42,000 msgs each
- 5 year 1 stock is about ~12,500 msgs 		$39/month
$31.25/month (w/ annual)
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Cost: Current quotes for 3400 US securities (Updated every minute for one month)Between $250/month & 3 minutes
and $30 & ~2 hours wait		$40/month & 29 minutes$2000/month*
- Costs more if you plan to show data details to clients, up to $8,500		Assuming yearly discount:
$52/month (IEX data)		Does not have current or delayed quotes
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Cost: 15 minute delayed pricing for 3400 US securities for a month$100/month
or
$50/month with extra delay		$40/month & 14 minute extra delay (29 minute delay)$2000/month* + $250/year
- Costs more if you plan to show data details to clients, up to $8,500		Assuming yearly discount:
$9/month (IEX data)		Does not have current or delayed quotes
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Cost: 20 years historical data of 3400 securities
Between $250/month & 3 minutes
and Free & a week		$40/month - *only goes back to 2007* Possibly can only get one year?$2000/month* + $250/year
- Costs more if you plan to show price to clients, up to $8,500		Assuming yearly discount:
- $46/month (reaching into pay you go messages)
Or
- $9/month & 25 years
$39/month
$31.25/month (w/ annual)
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Documentation* (Subjective)MediumHighMediumMediumMedium
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API/min5 -> 1,200 -> unlimted (with contacting them)120No Limit6000/min500* (1 bulk)
(35 calls/min if take into account the daily restriction)
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Fundamentals dataNot yetYesYesYesYes
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Alpha VantageIntrinioXigniteIEX CloudQuandl
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Cost: 20 years historical data of 6000 US and London stock exchange securities over the course of one month and 15 min delayed pricing of 6000 US and London stock exchange securities, and 15 minute delayed crypto prices of 500 cryptocurrencies$150/month

- 600 API calls per mintue		~$182/month
*No London 15 min delayed*

- $62/month London EOD price
- $40/month US EOD price
- $40/month US delayed prices
- NO DELAYED EUROPEAN PRICES
- Contact sales for crypto, variable $40/month
- 14 minute extra delay		$5,000/month + $500/year
*No crypto*

- (Assuming you don't show price to clients)
- $875/month North-America historical
- $125/month for JUST London* (Custom)
- $2000/month North-America Delayed
- $2000/month Europe Delayed
- $500/year delayed prices exchange fee
- No Crypto		~$216/month
*Quotes would be extra*

- Assuming yearly discount
- Assuming 15 years of the 6k + 5 years of the 6k: 327,000,000 msgs
- Delayed prices: 5,760,000 msgs
- Crypto: 0 msgs
- Total: 332,760,000 msgs

$71.25/month
*No Crypto, No Quotes*

- Assuming yearly discount
- $31.25/month US EOD prices
- $40/month London EOD prices
- No RealTime data
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**There seems to be some consensus about commercial use being viable through them all, but not all data packages. Exactly how commercial use works is unclear
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