I’d love to suggest an improvement to how splits work in workflows and experiments.
Currently, splits are limited to a random 50/50 distribution. For many use cases—especially when working with control and target groups—this is quite restrictive. It would be extremely valuable to be able to define custom split percentages (e.g. 90/10, 80/20, 70/30).
This would allow teams to:
- Maintain a smaller control group while exposing most users to the new experience
- Run more statistically sound experiments without sacrificing performance
- Gradually roll out changes while still measuring impact against a control
- Align experiments with business risk tolerance
Being able to customize split percentages would significantly improve HubSpot’s experimentation and optimization capabilities and make control/target group testing much more practical in real-world scenarios.
Thanks for considering this idea, and for continuing to improve the platform.
Best regards,
Louise