Hello Growthbook Team, First of all a big thank you to you guys for such an awesome and simple AB testing tool! It's been a life saver for me. However, as a feedback, please work on your documentation part with code examples. I haven't been able to find any demo codebase or working example of sticky bucketing anywhere. Documentation as well is very theoretical on it. Also, it would be great if you could add an API doc section where you add all the methods and properties of growthbook instance available to view at one place, like how you have API docs for rest API part of it

Hey quick feedback - really enjoying GrowthBook so far - I think I found a quick bug on Edit Analysis. When you manually edit the End date, it looks like the datepicker is rendering under the form (z-index lower than popup and overlay): Windows chrome incognito mode. You can see the popup hidden in the bottom right, that hides/shows based on clicking on the date form below End (UTC)

Hi! I have a question about calculating retention. Right now the rules are such that it is essentially considered Rolling Retention when we have the x+ days rule. Can you make it so that there is a restriction on the other side please? Not only >=, but also <. We have metrics RD1, RD7, RD1-7 where there are clear limits on when they must complete. Other than that, it would be really cool if it would be possible to pick a custom start event for retention. As an example: sometimes it's more correct for us to count those who have onboarded rather than from the first launch of the app. Plus, retention is usually counted from the first launch, not a specific event, so it won't be quite right for older users.

I also don't really like the way queries are written in GB, they don't look very optimal, at least for my cases with ClickHouse. Often a query is made WITH first the full table, then from it the data is filtered by conditions for the experiment. Here I showed how the query is sped up by half simply by moving the filters around, using an example of one of the queries I copied from GB: https://www.diffchecker.com/QVthzUpn/ Anyway, GB is great!

x posting https://growthbookusers.slack.com/archives/C01T6Q1SVFV/p1746641222108219

Feedback regarding scheduling of experiments (tried searching on this, but couldn't find anything): As we are getting more comfortable with the tool, we now wanted to start working with scheduling experiments to reduce the manual work of having to remember to turn on and off the experiment. I had two experiments that were supposed to start this morning using the feature, but I noticed that they never went live and the scheduling was gone from the feature. When asking the support AI it said that I must first put the experiments as running since the feature rule can't move it from draft and then the scheduling should work. I've attached two images of what it should look like from my understanding. The issue with this approach is that it really doesn't (imo) make sense to have an experiment as running if it's not running. There is nothing on the experiment page either that suggests that it's scheduled to start running at a specific time either, which makes it more confusing. The same goes for when the rule is disabled. The experiment is still "running". If this is not already something you have in your backlog to look over, i'd be more than happy to submit a github request 🚀

Is this a typo in the documentation? https://docs.growthbook.io/statistics/multiple-corrections

We can write both as follows, where V is the number of tests that are statistically significant but are false positives and R are the number of tests that are statistically significant.
False Discovery Rate=FDR=E[V/(V+R)]

Should be V/R?

Has simulate feature where you can enter values and see what features/experiments are assigned to become a part of premium plan? I see "simulate" is locked but no mentions of it under https://www.growthbook.io/pricing pricing plan comparison. Documentation does not mention it either https://docs.growthbook.io/features/rules#simulation where as for "archetypes" it's clearly stated.

Hi! Tried to create a segment from the actual table, but there is too much data and the query crashes due to lack of memory. We have a materialized view that we use for Experiment Assignment Query, and those tables are a million times smaller. Could you add it to the list of actual tables please?

Hi Growthbook, We are using slack notifications and I was wondering if it was possible to make a request to get an experment/phase started/stopped notification? This would help our ops folks. We are self-hosted/enterprise.

Hi! I’ve come across what appears to be a bug in GrowthBook’s handling of conversion window settings for metrics. While the metric delay (burn-in) is correctly reflected in the auto-generated SQL (e.g.

m.timestamp >= d.timestamp + INTERVAL '1 hour'

), the conversion_window (e.g. +

AND m.timestamp <= d.timestamp + INTERVAL '24 hours'

) is consistently missing, even when clearly configured in the UI and stored in the metric’s JSON (inspected via Web UI). I’ve tested: • Updating existing metrics → conversion_window is ignored. • Creating new metrics via the UI → still ignored. • Metrics (self-labeled) “in 90d”, “in 48h”, etc. → do not apply a user-relative time cap in the SQL, and we’ve therefore been consistently misreporting these numbers under the assumption that the window was respected. • Burn-in does work reliably, so this appears to be a partial implementation. Interestingly, I found one older metric that does apply the conversion window correctly, so it might be related to how/when the metric was created. Let me know if you’d like reproduction steps or example SQL — happy to share more. We're using GrowthBook Cloud w/ Build: 3.6.0+2d22835 (2025-06-10) Thanks in advance!

Hi, I cannot make changes using the visual editor. Any clue what I am doing wrong? I have made a quick video to showcase the issue: https://files.ghaus.me/a2xUcfqn

I’m getting this error from the “Explore time series” button

Both the front-end and back-end packages listen for the

PORT

environment variable, causing a conflict if it is set The platform I'm trying to deploy GrowthBook on, Railway, always sets this variable

// packages/back-end/src/app.ts
app.set("port", process.env.PORT || 3100);

to something like

app.set("port", process.env.BACKEND_PORT || process.env.PORT || 3100);

Made a pull request: https://github.com/growthbook/growthbook/pull/4284

Would it be possible to make it so that the tags for experiments and features can be assigned to only be in use for specific projects? We have projects for web and app (and more in the future), and having the tags we use in app be available in web by default will be messy over time with a very long list.

👋 Hello, team! Loouking Forward to collaboratibg

Hi All, since the update to GrowthBook 4.0, the Experiments view is always reverted back to its standard setting, showing all experiments and removing any selected filtering, like Tags - quite annoying as this means we always have to re-pick the right tab and apply the right filtering to only see our Experiments that are relevant to us. Also the ordering in the Tags Filter seems arbitrary, at least not sorted Alphabetically. (Using Chrome on Linux)

Is the MCP server working? It doesn’t seem to load any tools

Hello! We started to use GrowthBook relatively recently & we believe we found a bug that blocks us from using experimentation feature. Context In SDK configuration -> attributes we have keys following JS object access notation e.g.

user.targetingKey

,

user.email

, etc. Using dev tools we figured out that if we pass an object like

{ user: { targetingKey: "1234", email: "<mailto:joe@example.com|joe@example.com>"  } }

, our experiments are always skipped for all users with message "Skip because missing hashAttribute" (hashAttribute being set as

user.targetingKey

) even though

user.targetingKey

is (sort of?) specified. Problem In order to fix this, we tried to pass literal keys with dots e.g.

{ "user.targetingKey": "1234", "user.email": "<mailto:joe@example.com|joe@example.com>" }

& it fixed experimentation but broke feature flag conditions (e.g.

IF user.targetingKey = "3456"

lines in GB settings) which worked correctly with nested objects. This seem to work as described in any SDK, but, as a matter of fact, we use SDKs for React & .NET. Extra Additionally to the bug itself, dev tools make it feel like nested objects aren't supported at all which doesn't quite correlate with SDK setup instructions shown in GB itself (see screenshots attached)

https://docs.growthbook.io/kb/google-analytics/google-big-query-bq-troubleshooting Here it says "GA4 offers a streaming export option that sends event data to BigQuery within minutes, rather than once per day, but this is only available for GA4 properties on Google Analytics 360 which is the paid Enterprise version." but looks like you can use it in the free version too.

Hi team, I recently started using MCP server and I'm setting up the configuration according to the official documentation but it's returning me ❌ Error: HTTP 401 Unauthorized: {"status":401,"message":"jwt malformed"}

I'm using Cursor, and this is my configuration

When I click on these buttons "Add to Growthbook" nothing happens?

Minor bug. When I clone an experiment with 2 variants and add a third variant during setup, I’m unable to open the code editor for the 3rd variant:

Hey team, I'd like to raise a possible bug on this side panel for the metric. This is a ratio metric with

displayAsPercentage: true

. On the Display Thresholds section, the numerator thresholds are also being shown as percentage, when it should be considered as an integer.

Hi team please have a look at this: https://github.com/growthbook/growthbook/issues/4533

Hey, we are unable to upgrade to a pro plan because of this error

License server errored with: Unable to create new subscription. Existing active subscription:

we were on enterprise trial, support downgraded us so we could upgrade to pro, but we are still unable to upgrade.

Hey, I've been using GB for a while now and I'm missing 2 features which would be very useful for my organisation. 1. Allow users to set a spending cap. My CTO would prefer to be able to set a limit to make sure we don't go over our allocated budget for GB 2. Allow us to see the CDN usage per project instead of per account

Hi team, would love to see this new feature for the GB API: https://github.com/growthbook/growthbook/issues/4599