Squareblack
Warsaw, Poland
About
Boutique UX/UI design agency led by senior designers with 20+ years experience in fintech and SaaS.
Who They Work With
Fintech, SaaS and e-commerce teams wanting a senior-led, fixed-scope sprint—conversion-focused redesigns, not open-ended discovery.
Based on 9 documented clients · verified Jul 2026
Our Take
Eleven projects are named on the site—including PayPo, FxPRO, Decathlon Rent, Medidesk and Tygodnik Powszechny—but only KupFundusz carries a written case study, and it is a strong one: user research and A/B testing informed dual flows for beginners and power users, two separate desktop and mobile design systems, and 100+ redesigned screens, with before/after figures of 400% views and 270% new registrations between October 2024 and March 2025.
The other ten projects appear as logos or external links with no published process or outcomes, so you will need to request walkthroughs to judge depth on anything beyond that one case.
The studio openly markets dropping "outdated UX processes, workshops" in favor of fixed two-week sprints led personally by one of two named senior designers, which suits founder-driven conversion work but means buyers wanting documented discovery and research should confirm scope first.
The weaker fit is buyers wanting documented discovery or workshops—the studio openly markets skipping traditional UX process for a fixed $10,000 two-week sprint, and only KupFundusz carries a full written case study; the rest are one-line blurbs.
Key strengths
- Pricing is published rather than gated: a $10,000 two-week design sprint (20-30 screens, +$4,000 for landing-page coding) and express audits from $500, so you can budget before the first call
- Every engagement is delivered personally by one of two named senior designers, giving you a single accountable point of contact rather than a rotating team
- The one detailed case study (KupFundusz, fintech) documents research, A/B testing and dated before/after metrics, showing the depth available when a project is written up
Good to know
- Ten of the eleven listed projects are logos or live-site links with no published process or results—ask for written walkthroughs and metrics on work in your vertical before committing
- The studio markets skipping traditional UX workshops and discovery in favor of speed—if your project needs documented research or stakeholder alignment, confirm that scope and pricing up front
- Healthcare, automotive and e-commerce verticals are named (Medidesk, Decathlon Rent, Wholesale Central) but only fintech has a detailed case study—request relevant samples if your domain is outside finance or SaaS
Reviewed by Gabor Kiss
Founder of UX Agencies · UX Lead at SAP · May 30, 2026
Based on the agency's publicly available portfolio. Own this agency? Claim your profile to provide additional context or request a review update.
Notable Clients
Every engagement documented in a published case study
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