User experience (UX) for startups: core principles

User experience (UX) is everything users feel and achieve while using your product. Early on you do not need a big design team, but a few core principles directly improve conversion and retention.

Onboarding

A user's first minutes largely decide whether they stay.

• Minimise sign-up steps; do not ask for unnecessary information.
• Get users to the core value (the "aha" moment) by the shortest path.
• Show sample data or guidance instead of empty screens.
• Support the first days with short, useful emails.

Simplicity

• Give each screen one main purpose.
• Hide or postpone rarely used features.
• Write in the user's language, not technical terms.
• Use consistent buttons, colours and terms.

At the MVP stage, simplicity matters as much as speed.

Usability testing

Simple tests with five users reveal most problems:

1. Give a realistic task ("Create a new invoice").
2. Watch without helping; ask them to think aloud.
3. Note where they get stuck.
4. Fix the top three issues and test again.

See our customer interview guide for techniques.

Accessibility

• Enough colour contrast and readable text sizes
• Keyboard usability
• Descriptive alt text for images
• Clear labels and error messages in forms

Accessibility widens your audience and is viewed positively by search engines.

Mobile

Many users will try your product on a phone. Design for small screens first, keep tap targets large and measure page speed regularly.

Measurement

• Task completion rate and time
• Share of users returning after first use
• Support request topics
• Short satisfaction surveys

See our startup metrics guide for retention.

Conclusion

Good UX is not an expensive luxury but a foundation for growth. Watch users regularly, remove the biggest obstacles and keep things simple. For reducing churn, see our churn guide.