Which agency should a Series A startup hire to redesign a live product?

Redesigning a product with paying customers carries a risk that a new build does not. People already know where things are. Move the navigation, merge two screens or rework the setup flow, and the customers who built habits around the old version notice first.

Seven agencies publish a case study that starts from a product already in use: Cieden, Eleken, Humbleteam, Lumi Studio, Monico Product Studio, Parallel and UX studio. Cieden and Eleken show screen-by-screen work on SaaS tools with live customers. Lumi Studio and Monico show retention, onboarding and pivot work. Parallel adds a three-year embedded engagement, and UX studio a research-led redesign of an older web application.

Humbleteam publishes this comparison and is one of the agencies in it. The agencies appear alphabetically. This is an editorial reading of public case studies and service pages, with no paid placements, scores or ranking. A case study gives you a reason to start a conversation. It does not tell you today’s availability, price or which people would join your project.

Many guides tell a Series A company to hire a senior in-house product designer instead. That is often right when nobody owns design decisions, and our comparison of agency, freelancer and in-house options covers it. This page is for the next step: you have decided to bring in an outside team for a product your customers already use.

How we chose the agencies

Every agency, Humbleteam included, had to meet three criteria:

1. It offers product UX/UI design for software, not only branding or marketing websites.
2. It publishes at least one case study about redesigning a product that was already live, and the page describes the existing product’s problems before the change. A new build or a concept project did not count.
3. It works with startups or young software companies as an outside team, shown by its own description or a named client of that kind.

Some well-known names are missing because we did not find the evidence on the same terms. UX Signal Studio publishes audits and proposed redesigns, which show how it diagnoses a product but not a redesign that shipped to users. Gev Design’s homepage work list is mostly brand, site and early-product projects, and we found no live-product redesign case on it. MetaLab, Clay and Ramotion appear in other roundups, and we did not assess them for this page. A missing name is not a judgment on the team. Ask for a comparable live-product case.

Cieden: one core workspace, rebuilt with active users

Cieden is a remote-first design agency that also builds software. Its Foqal case covers a California support platform used by IT, HR and customer service teams. The brief was to redesign the ticketing system, starting with the Kanban board and ticket detail view. The page lists the problems it found in the live product: drag-and-drop that made tickets vanish, bulk actions few users could find, and ticket information scattered across tabs.

Cieden says its designers had direct access to active users and tested prototypes in short loops. One UX/UI designer and one business analyst worked for about 7.5 months in two phases. No metric is printed, so ask how the change was assessed.

Eleken: successive releases on a product that is already running

Eleken is a SaaS-only product design agency working from Kyiv as a distributed team, on a monthly subscription. Two of its cases begin from a live product.

SEOcrawl had been on the market for about half a year when Eleken started. The team redesigned the main tools in turn, showed new screens to SEOcrawl’s customers for feedback, and had the changes implemented step by step in under four months. The CEO is quoted crediting the new design for user growth. The myInterview case opens with more than 90% of candidates dropping out mid-interview. Eleken revamped the existing web app, shows before and after screens, and added a shared design system.

This suits a team that has a product, users and engineers and wants steady design capacity. Confirm who recruits users for testing and who builds the designs.

Humbleteam: making existing data and AI behavior legible

Humbleteam is a product design agency with offices in Prague and Dubai. Two public cases begin from a product already built. In the Luna Ring case, the smart ring collected rich sleep and recovery data but the app showed it as a wall of numbers. Humbleteam redesigned the mobile app around three daily scores, a short check-in and plain-language explanations, with a design system and product voice. In the Cluely case, it redesigned the platform experience of a real-time AI meeting assistant, from live suggestions to the post-call summary and first-run setup.

Two limits matter. Neither page prints an outcome metric or describes how existing users were moved to the new version, and Luna Ring is a hardware brand rather than a young software company. Ask for activation or retention evidence and agree who implements the designs. Our guide to redesigning a startup product without losing what works covers the team’s approach.

Lumi Studio: retention problems and changes of direction

Lumi Studio is a small product studio for startups. It says it has 11 people, works fully remotely and lists Palo Alto, Edinburgh and Lisbon, and it also offers development. Its FYTA case concerns a Berlin plant-sensor startup whose users bought the sensor, set it up and forgot the app. Lumi interviewed customers, then redesigned the app around habit formation, with a simpler home screen, quizzes and badges and a reworked in-app store. The page says early testing showed higher user motivation and prints no sales or retention figure.

The Orbiit case covers a product pivot from community matchmaking to B2B SaaS. The page says the redesign had to avoid leaving existing community customers behind, and the studio reports a 400% rise in average customer value. Its own site says most clients work on products with a social or environmental purpose, so check the fit.

Monico Product Studio: fixed-scope redesigns in regulated fields

Monico is based in Austin, Texas and says it works mainly in healthtech and fintech, with a small senior team that can hand designs to your engineers or build in your repository. Its b.well member app case begins with an MVP app already live with a few health plan clients. Monico rebuilt account creation, onboarding, claims and appointment booking over eight weeks, and the studio reports 64% fewer support tickets and 172% more online bookings. b.well is a Series C company, so the case shows live-product discipline more than Series A scale.

The Twella case is closer to Series A: a seed-stage education app whose sign-up form dropped users onto a home feed with no orientation. Monico redesigned onboarding in four weeks. The page says the KPIs are still being measured, so there is no result to weigh yet.

Parallel: onboarding, and a long embedded engagement

Parallel is a design agency for AI and SaaS companies with offices in San Mateo and Bengaluru. In the Sequifi case, a payroll and HR product for home services, the team audited the existing onboarding flow, redesigned it and built a design system with usage documentation. No metric is printed. The UrbanPiper case describes a three-year embedded engagement across five products for a restaurant technology company, including a single login across tools and a unified design system. Parallel’s SaaS page also says it favors evolutionary redesigns with progressive rollout, a claim you should test in conversation.

UX studio: research-led redesign of an older application

UX studio is headquartered in Budapest and pairs designers with researchers. Its IncQuery Suite case covers the redesign of a web application the page calls decade-old. The team ran workshops on architecture, value proposition and roadmap, then worked in two-week sprints for 1.5 years and received a Red Dot award, according to the agency. The client is an engineering-software company and the page does not state its funding stage. UX studio says it has worked with a variety of startups, so ask for one comparable example.

How to choose

The failure you need to fix narrows the list faster than the portfolios do.

• If customers say they can no longer find things, you need a team that has redesigned a live product in stages with customer feedback. Eleken, Cieden and Parallel describe work of that kind.
• If users sign up and leave, look at onboarding and retention cases: Lumi Studio’s FYTA, Monico’s Twella and Parallel’s Sequifi.
• If the product’s data or AI output confuses people, compare Humbleteam’s Luna Ring and Cluely with Lumi’s FYTA.
• If the product is old and the logic is tangled, UX studio’s IncQuery case shows a long research-led path.

Then ask every shortlisted agency the same four questions:

1. Show a before and after of a product that customers were using during the project. What did you keep, and why?
2. How were existing customers moved to the new version, and what could be reversed?
3. Who tests with real users, and who implements the designs?
4. What evidence did the client see afterwards, and who measured it?

The strongest answers name something the agency chose not to redesign. Our Series A redesign release plan turns those answers into a rollout worksheet. If your search is wider than redesign, the comparison of agencies for funded startups covers other needs.

Send the same real problem to two or three agencies from this list: one workflow, the current data and a description of what must keep working. Compare the proposed first release, not the portfolios.