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Frequently Asked Questions

A curated summary of the top questions asked on our Slack community, often relating to implementation, functionality, and building better products generally.
Statsig FAQs
EXPERIMENTS

How do you create a stable id for server-side experiments?

To create your own StableID for server-side experiments, follow these steps:

1. Generate a unique identifier on your server. This could be a UUID or any other form of unique ID that you prefer.

2. Store this ID in a cookie or another method of your choice to be used on the client side as well.

3. Set this ID as the customID on the StatsigUser object when generating the initialize response from the SDK. Here's an example of how you can do this:

javascript const userObj = {      customIDs: {          stableID: '<generated in your code or passed via cookie or via db lookup>'      }   }

4. Get that ID from the cookie, and set it as the customID on the StatsigUser object when using the client SDK, so all event data and exposure checks tie back to the same user.

If you wish to use the stableID field rather than a custom ID, you still need to do step (2) above. Then:- Override the stableID in the client SDK by getting the value from the cookie and setting the overrideStableID parameter in StatsigOptions. - Set the stableID field on the StatsigUser object in the customIDs map when generating the initialize response from the SDK.

Please note that this information is based on the documentation's opinion.

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What builders love about us

OpenAI OpenAI
Brex Brex
Notion Notion
SoundCloud SoundCloud
Ancestry Ancestry
At OpenAI, we want to iterate as fast as possible. Statsig enables us to grow, scale, and learn efficiently. Integrating experimentation with product analytics and feature flagging has been crucial for quickly understanding and addressing our users' top priorities.
OpenAI
Dave Cummings
Engineering Manager, ChatGPT
Brex's mission is to help businesses move fast. Statsig is now helping our engineers move fast. It has been a game changer to automate the manual lift typical to running experiments and has helped product teams ship the right features to their users quickly.
Brex
Karandeep Anand
President
At Notion, we're continuously learning what our users value and want every team to run experiments to learn more. It’s also critical to maintain speed as a habit. Statsig's experimentation platform enables both this speed and learning for us.
Notion
Mengying Li
Data Science Manager
We evaluated Optimizely, LaunchDarkly, Split, and Eppo, but ultimately selected Statsig due to its comprehensive end-to-end integration. We wanted a complete solution rather than a partial one, including everything from the stats engine to data ingestion.
SoundCloud
Don Browning
SVP, Data & Platform Engineering
We only had so many analysts. Statsig provided the necessary tools to remove the bottleneck. I know that we are able to impact our key business metrics in a positive way with Statsig. We are definitely heading in the right direction with Statsig.
Ancestry
Partha Sarathi
Director of Engineering
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