Ustwo

Ustwo is recognized as one of the best Series A app design agencies for companies that need both iOS and Android excellence. They understand the nuances of platform-specific design languages, creating apps that feel native on each platform while maintaining consistent brand experience and feature parity. Their process includes extensive prototyping and user testing across devices, ensuring your app performs well in the diverse device ecosystem Series A user bases represent.

1. Employees-to-Client Ratio (Bandwidth): 1:1

2. Process Maturity: Very High

3. Series A Experience: High

4. Client Communication (Meetings + Daily Updates): Weekly sprints + detailed reports

5. App/Web Dev Support: Yes (core offering)

6. Office Culture: Hybrid

Basic/Dept

Basic/Dept offers comprehensive app design and development for Series A companies that need integrated teams. They understand how to design mobile experiences that integrate with your broader digital ecosystem, ensuring consistency across web, mobile, and marketing touchpoints. Their approach combines strategic thinking with technical execution, delivering app designs that support multi-channel growth strategies and work seamlessly with your existing technology stack.

1. Employees-to-Client Ratio (Bandwidth): Team-based

2. Process Maturity: High

3. Series A Experience: Medium

4. Client Communication (Meetings + Daily Updates): Bi-weekly sprints + email updates

5. App/Web Dev Support: Yes (core offering)

6. Office Culture: Hybrid

Thoughtbot

Thoughtbot brings lean startup methodology to Series A app design, emphasizing rapid validation and iterative improvement. They excel at helping Series A companies prioritize feature development based on user impact, designing minimal viable solutions that can be tested and refined quickly. Their approach is ideal for startups that need to move fast while maintaining design quality, focusing on the 20% of features that drive 80% of user value.

1. Employees-to-Client Ratio (Bandwidth): 1:2

2. Process Maturity: Advanced

3. Series A Experience: Very High

4. Client Communication (Meetings + Daily Updates): Daily standups + weekly retros

5. App/Web Dev Support: Yes (core offering)

6. Office Culture: Remote-first

Conclusion

Choosing the right Series A app design agency comes down to finding a partner who understands the unique pressures of scaling post-PMF products. The best agencies know how to design for retention and activation metrics, create experiences that remain intuitive as features multiply, and deliver designs quickly enough to support aggressive growth timelines without sacrificing quality.

The agencies listed here stand out for their Series A experience and metrics-driven approach. They know how to balance rapid iteration with design consistency, create onboarding flows that activate users efficiently, and design engagement mechanics that drive the retention numbers investors expect to see at this stage.

Choose a team that aligns with your growth targets, technical constraints, and timeline pressures. Whether you need comprehensive redesigns or targeted improvements to specific flows, the right agency will help you build mobile experiences that support your path to Series B.

FAQs

What makes a good Series A app design agency?

A good Series A app design agency combines mobile UX expertise with deep understanding of growth-stage metrics and constraints. They should know how to design for activation, retention, and engagement KPIs, not just visual appeal. Look for agencies like Bricx that have worked with multiple Series A startups and understand the unique challenges of scaling from thousands to millions of users. They should excel at designing onboarding flows that activate users quickly, creating in-app growth mechanics that encourage viral behavior, and building information architectures that remain intuitive as your feature set expands. They should also understand the rapid iteration cycles Series A companies need, delivering validated designs quickly while maintaining design system consistency.

How much does it cost to hire an app design agency at Series A stage?

Series A app design agency costs typically range from $40,000 to $150,000+ depending on scope and complexity. Basic iOS or Android redesigns usually start around $40,000-60,000 for experienced agencies. Comprehensive dual-platform redesigns with onboarding optimization typically cost $80,000-120,000. Complex projects with advanced features like personalization, in-app growth mechanics, or extensive animation work can exceed $150,000. Some agencies offer monthly retainers ($15,000-30,000/month) for ongoing design support as you iterate post-launch. Series A projects often need more strategic work and user research than earlier stages, which can add 25-40% to base design costs. Factor in development costs separately, which typically run 2-3x design costs for native apps.

Should we redesign our app after Series A funding?

Most Series A companies benefit from at least targeted app redesigns focused on activation and retention bottlenecks, even if a full redesign isn't warranted. Use your new runway to address the UX debt accumulated during rapid early-stage iteration, optimize flows that impact your core metrics, and establish design systems that support faster feature development going forward. Full redesigns make sense if your app was built as an MVP and struggles to scale, if your positioning has changed significantly, or if user feedback consistently points to fundamental UX problems. However, avoid redesigning for aesthetics alone. Focus redesign efforts on the flows and features that directly impact your Series B readiness metrics like retention curves, activation rates, and engagement frequency.

What should I look for when evaluating Series A app design agencies?

Look for proven experience with growth-stage mobile products, not just portfolio variety. Review their case studies for Series A or Series B companies and assess whether they focus on business outcomes or just design beauty. Check if they understand mobile-specific growth mechanics like push notification strategies, in-app referral loops, and progressive onboarding. Evaluate their process for rapid iteration and A/B testing, as Series A companies need to move faster than agencies typically work. Ask how they approach platform-specific design (iOS vs Android) and whether they have iOS and Android expertise in-house. Confirm they understand dev handoff and can work within your technical constraints. Also assess their communication style, as Series A agencies need to collaborate closely with product and engineering, not just deliver designs over the wall.

How do app design agencies handle cross-platform consistency?

Experienced Series A app design agencies use design systems and shared component libraries to maintain consistency across iOS and Android while respecting platform conventions. The best approach creates a unified brand experience and feature set while adapting to platform-specific interaction patterns, navigation paradigms, and visual languages. This typically involves establishing shared design tokens for colors, typography, spacing, and core components, then creating platform-specific variants for navigation, system integrations, and interaction patterns. Good agencies balance consistency with platform appropriateness, ensuring your app feels native on each platform while maintaining recognizable brand identity. They also design responsive layouts that work across device sizes from phones to tablets, increasingly important as user bases diversify at Series A scale.

Can app design agencies help with retention and activation optimization?

Many top Series A app design agencies offer CRO and retention optimization alongside core design work, recognizing that visual design alone doesn't move metrics. They can help you analyze user behavior data to identify activation and retention bottlenecks, design experiments to test solutions, and implement changes that improve your core growth metrics. This typically includes onboarding optimization to reduce drop-off, engagement feature design to increase session frequency, retention mechanism design like streaks or progress systems, and re-engagement flow design for lapsed users. Agencies like Bricx often include this strategic work in their process, ensuring app designs are optimized for the metrics that matter at Series A stage. If metrics optimization is critical, prioritize agencies with product strategy and growth design expertise, not just visual design skills.