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The free API is built on a proven, high-performance system, and drives many of the applications we use within IEX.

Start using data in seconds with our simple and powerful API. No account required.


3.5 million

messages per second peak

262 TB

data transfered per month



web uptime


database uptime

RegSCI System

Our system is regulated for the highest level of integrity, resiliancy, and security.

Google Cloud

The performance, scale, and reliability of Google's technology runs our API.

Data loss protection

We developed and patented multiple ways to ensure data integrity.


1.1 trillion

database records (and growing)


queries per second peak

72 TB

database size (and growing)

300 GB

data added per day

Redis caching

180 K

average operations per second

10.51 B

operations per day


We use two active-active clusters with geographic availability to protect against regional failures.



Patented. We actively run multiple copies of every server to ensure high availability.


We run in 5 datacenters with multiple DNS providers.


We scale our servers on-demand based on custom metrics.