ChatGPT answers, unedited

• Vault Innovation - 20 N Wacker Dr Ste 1200, Chicago, IL 60606, United States
• Doejo - 444 N Wabash Ave, Chicago, IL 60611, United States
• IDE Interactive, Inc. - 2945 W Peterson Ave Ste 103, Chicago, IL 60659, United States
• Highland - 125 S Clark St Ste 670, Chicago, IL 60603, United States
• UX 4Sight - 111 W Jackson Blvd Unit 1700, Chicago, IL 60604, United States
• Beyond Design, Inc. - 3759 N Ravenswood Ave, Chicago, IL 60613, United States
• Brand Vision Marketing - Web Design & Branding - 30 N Michigan Ave #504, Chicago, IL 60602, United States
• product council - 5547 N Ravenswood Ave Unit 406, Chicago, IL 60640, United States
• MNML - 170 N Sangamon St, Chicago, IL 60607, United States
• TEAMS Design - 1812 W Hubbard St #200, Chicago, IL 60622, United States
• Hatch Product Development - Chicago, IL 60622
• click5 Interactive LLC - 116 W Hubbard St #301, Chicago, IL 60654, United States
• Beyond Design - 4515 N Ravenswood Ave, Chicago, IL 60640
• ArtVersion® Creative Agency - 211 W Wacker Dr Ste 1130, Chicago, IL 60606, United States
• Primal Design - 1623 W Fulton St, Chicago, IL 60612, United States

Yes. If the requirement is specifically startup MVP + mobile-first UX/UI + actual implementation, I’d prioritize agencies that do product design and engineering together rather than a traditional branding/web shop.

My Chicago shortlist

• Vault Innovation — Strongest overall fit. They explicitly work with founders on MVPs and v1 products, combining product discovery, UX/UI, prototyping, and mobile/web development. Their positioning is particularly close to “take our startup idea and turn it into a launchable product.”
• Doejo — Good for a polished startup website + product experience. Chicago-based digital product studio with UX/UI, responsive web, software, and mobile capabilities. Good option if the MVP includes both a marketing site and application experience.
• IDE Interactive, Inc. — Good UX/product-development option. They combine experience design with web, custom software, and mobile development, including consumer-oriented mobile experiences.
• Highland — Best if you want deeper product strategy. They do human-centered design, rapid validation, prototyping, UX research, product strategy, and then build web/SaaS/mobile products. This is probably more sophisticated—and potentially more expensive—than you need for a simple MVP.
• UX 4Sight — Best if UX is the primary concern. They specialize in UX/UI, responsive web design, usability/accessibility audits, wireframes, and conversion-oriented experiences. I'd consider them particularly if you already have developers or want to separate design from engineering.

Also worth interviewing

Bolder Apps is especially interesting if “MVP” means a functioning product rather than merely an MVP marketing site. They say many startup MVPs launch within ~10 weeks and offer discovery → design → development → launch, with projects starting around $30K. Bolder Apps

HumbleSpark is another particularly relevant Chicago shop because it explicitly describes itself as UI-focused, offers UX/UI design, mobile-first web development, React/Node, and React Native mobile development. HumbleSpark

Lakeview Labs has unusually strong startup/mobile credentials. Its team describes having started with startups and becoming known as the “mobile guys” in Chicago, with experience across numerous startup and digital-product projects. Lakeview Labs

Brightter is worth considering if your “MVP site” is more of a startup website/web application hybrid. They specifically market to Chicago startups and combine UX, responsive Webflow/WordPress sites, React/Node applications, product strategy, and design systems. Brightter Brightter

If I were hiring

I'd send the same brief to Vault Innovation, Doejo, HumbleSpark, Lakeview Labs, and Bolder Apps and compare the proposals.

For your particular requirement, I'd score them on:

One thing I'd specifically ask each agency: “Show us 2–3 mobile-first startup MVPs you designed and shipped, and let us see the original mobile Figma screens alongside the live product.” That will separate genuine product agencies from agencies that simply advertise “responsive design.”

If you tell me roughly your budget ($10–25K, $25–50K, $50K+) and whether you need just the website or the website + functional MVP, I can narrow this to the best 3 Chicago agencies and compare their likely fit, pricing, speed, and strengths.

• Eight Bit Studios - 1 E Erie St, Chicago, IL 60611, United States
• LaunchPad Lab - 448 N La Salle Dr Fl 9, Chicago, IL 60654, United States
• Vault Innovation - 20 N Wacker Dr Ste 1200, Chicago, IL 60606, United States
• Red Foundry - Chicago, IL 60007
• TXI - 10 S Riverside Plaza Ste 875 - #7670, Chicago, IL 60606, United States
• Doejo - 444 N Wabash Ave, Chicago, IL 60611, United States
• Punchkick Interactive - 150 N Michigan Ave, Ste 3900, Chicago, IL 60601
• IDE Interactive, Inc. - 2945 W Peterson Ave Ste 103, Chicago, IL 60659, United States
• Synergy Labs - Mobile App and Web Developers Agency in Chicago - 515 N State St, Chicago, IL 60654, United States
• Brand Vision Marketing - Web Design & Branding - 30 N Michigan Ave #504, Chicago, IL 60602, United States
• click5 Interactive LLC - 116 W Hubbard St #301, Chicago, IL 60654, United States
• Dom & Tom - 625 N Michigan Ave, Ste 1800, Chicago, IL 60611
• Simpalm | App & Web Development Company - 205 N Michigan Ave Suit 810, Chicago, IL 60601, United States
• SnapMobile - 440 N Wells St, Ste 205, Chicago, IL 60654
• ArtVersion® Creative Agency - 211 W Wacker Dr Ste 1130, Chicago, IL 60606, United States
• Alpha Efficiency - Web Design Chicago Agency - 875 N Michigan Ave, Chicago, IL 60611, United States

Yes. If by “mobile-first design for a startup MVP site” you mean a team that can take you from product/UX thinking → mobile-first responsive design → development → launch, I’d shortlist these Chicago firms:

My shortlist

• Eight Bit Studios — Best overall fit for a startup MVP. Chicago product studio combining product strategy, UX/UI, and engineering for web/mobile products. Particularly attractive if you need the agency to help define the MVP rather than simply execute a finished design.
• LaunchPad Lab — Best for product + UX + web development. Strong fit if the site is really the first version of a digital product. They emphasize discovery, user research, UX/UI and product roadmapping.
• Vault Innovation — Best for mobile/product UX. Their offering spans product discovery, UX/UI, mobile and web development, and MVP work. Good candidate if your “site” will eventually become a mobile product.
• Red Foundry — Best for a more technical MVP. End-to-end product strategy, UX/UI, mobile/web development and integrations. I'd consider them if the MVP has meaningful backend or API complexity.
• TXI — Best high-end product-design option. They combine research, human-centered design and engineering. I'd put them on the list if validating the UX and product concept is as important as building the site. They may be more agency than you need for a very lean MVP.
• Doejo — Best smaller/local digital studio option. They do design, responsive web development, software and mobile, so they can cover a broader range without necessarily approaching the project like a large consultancy.
• Punchkick Interactive — Worth considering if mobile-first interaction design is particularly important. Their positioning centers on digital product strategy, UX/UI, mobile apps and web experiences.

If speed/budget is the priority

There are also newer MVP-focused shops worth getting quotes from:

• RapidDev says its Chicago MVP work typically runs 6–12 weeks, with fixed-price builds of roughly $13K–$25K, including web/mobile and design. RapidDev
• ShipMyApp is considerably more aggressive on speed and price, advertising fixed-price MVPs and roughly 21-day delivery, with UI/UX included. ShipMyApp.io
• Bolder Apps is a more established middle ground: it lists startup MVPs at roughly $30K–$60K, typically 8–10 weeks, including product strategy, UI/UX and development. Bolder Apps
• Cabot Solutions is another option if you want a larger engineering team; it describes Chicago startup MVP engagements around 10–14 weeks, with discovery, UX/UI, development and launch. Cabot Solutions

Who I'd contact first

For the specific combination of startup + MVP + mobile-first UX + website/product build, I'd probably send an RFP to:

1. Eight Bit Studios
2. LaunchPad Lab
3. Vault Innovation
4. Red Foundry
5. Bolder Apps

I'd ask each for a proposal that explicitly separates discovery/UX, mobile-first design, responsive implementation, CMS/admin functionality, analytics, and post-launch iteration. That will make it much easier to compare agencies rather than getting five wildly different interpretations of “build our MVP.”

If you tell me your approximate budget (e.g. <$15K, $15–30K, $30–75K, $75K+) and what the MVP actually does, I can narrow this to 3 agencies and compare their likely fit, pricing, strengths, weaknesses, and relevant portfolio work.

• Eight Bit Studios - 1 E Erie St, Chicago, IL 60611, United States
• TXI - 10 S Riverside Plaza Ste 875 - #7670, Chicago, IL 60606, United States
• Doejo - 444 N Wabash Ave, Chicago, IL 60611, United States
• click5 Interactive LLC - 116 W Hubbard St #301, Chicago, IL 60654, United States
• Vault Innovation - 20 N Wacker Dr Ste 1200, Chicago, IL 60606, United States
• IDE Interactive, Inc. - 2945 W Peterson Ave Ste 103, Chicago, IL 60659, United States
• Design Henge - 2259 W Rosemont Ave, Chicago, IL 60659, United States
• Brand Vision Marketing - Web Design & Branding - 30 N Michigan Ave #504, Chicago, IL 60602, United States
• UX 4Sight - 111 W Jackson Blvd Unit 1700, Chicago, IL 60604, United States
• Chicago Website Design SEO Company - 10 S Riverside Plaza #875, Chicago, IL 60606, United States
• Chykalophia - 929 Michigan Ave Apt. 3, Evanston, IL 60202, United States
• Millennial Web Development - 329 W 18th St Ste 413, Chicago, IL 60616, United States
• Synergy Labs - Mobile App and Web Developers Agency in Chicago - 515 N State St, Chicago, IL 60654, United States
• Artversion - 205 N Michigan Ave 8th Floor, Chicago, IL 60601
• Alpha Efficiency - Web Design Chicago Agency - 875 N Michigan Ave, Chicago, IL 60611, United States
• Dialogue Theory - 1932 S Halsted St #509, Chicago, IL 60608, United States

Yes. If by “mobile-first design” you mean a startup MVP website that is designed around phone users first, but also has strong UX, responsive behavior, and enough product thinking to evolve into the MVP, I’d shortlist these Chicago firms:

My top 3 for your use case

1. Eight Bit Studios — I'd start here if you want “take our concept → figure out the UX → design the mobile experience → build the MVP.” Their positioning is unusually close to what you're describing. Eight Bit Studios

2. Vault Innovation — worth talking to if the website is really the front end of a broader product. They specifically mention founders/small businesses needing MVPs and connect UX discovery to implementation.

3. UX Brite — strongest candidate if conversion, onboarding and user behavior are as important as the visual design.

There are also some more explicitly MVP-focused Chicago options. RapidDev says it builds mobile + web MVPs for Chicago founders, including Next.js websites, React Native/Expo apps, and shared infrastructure. RapidDev ShipMyApp is the much more aggressive speed/budget option, advertising fixed-price MVPs with UI/UX included and ~21-day delivery. ShipMyApp.io

One thing I'd ask every agency

Don't just ask “Do you do mobile-first?” Almost everyone will say yes.

Instead, give them a brief like:

“We need a startup MVP site where the primary design experience is mobile. We want UX flows, clickable prototype, responsive desktop adaptation, development, analytics, and the ability to evolve the site into the actual product. Show us 2–3 comparable startup projects and explain what you personally handled.”

That will quickly separate actual product/MVP agencies from conventional Chicago web-design shops.

If you tell me your rough budget (e.g. <$15k, $15–30k, $30–75k, $75k+) and what the MVP does, I can narrow this to 5 agencies with the best fit and likely engagement model, including their websites and relevant portfolio examples.

Yes. If the goal is a startup MVP site where mobile-first UX is part of the product strategy—not just “make the desktop site responsive”—I’d shortlist these Chicago firms:

My top 3

1. Eight Bit Studios — I'd start here if you're looking for a genuine product-design partner, not simply a web agency. Their own 2026 startup comparison describes their model as design + development under one roof, which is exactly what you want for an MVP. eightbitstudios.com

2. LaunchPad Lab — I'd talk to them if the MVP website is likely to become a larger SaaS/web application. Their positioning is much more “digital product” than “marketing website.”

3. Vault Innovation — Good candidate if you're trying to keep the first version lean. Their Chicago offering explicitly covers lean MVPs, prototypes, UX/UI and custom software. www.vaultinnovation.com

One important distinction

If by “MVP site” you mean a marketing/landing site for a startup, rather than the actual MVP product, I'd look at a different group. For example, Brand Vision Marketing - Web Design & Branding has a strong emphasis on responsive UX, conversion-oriented web design and mobile-friendly performance.

If you mean “the website itself is the MVP product”—e.g. users sign up, create accounts, search, transact, interact with a dashboard, etc.—I'd prioritize Eight Bit, LaunchPad, Doejo, Vault, and Synergy Labs.

For comparison, some agencies specifically advertise mobile-first builds: PIXALPHA says its custom sites are designed mobile-first, while Geminate describes responsive design as mobile-first and explicitly offers startup MVP-to-scale work. pixalpha.net

If you tell me your MVP type, approximate budget (e.g. $15–30k / $30–75k / $75k+), and whether you need just the site or site + product/backend, I can narrow this to 3 Chicago agencies and compare their likely fit, pricing, portfolio, and engagement model.

Yes. If by “startup MVP sites” you mean a marketing/product site that needs to be designed mobile-first, validated quickly, and potentially connected to the MVP itself, I’d shortlist these Chicago-area firms:

My top 4 for your use case

1. Eight Bit Studios — I'd talk to them first if the website is closely tied to the actual product. They're positioned around taking founders from concept through product design, development and launch.

2. HumbleSpark — particularly compelling if your priority is a mobile-first experience that doesn't feel like a desktop site squeezed onto a phone. They explicitly call out mobile-first web and app development. www.humblespark.com

3. UX Brite — good choice if you're trying to make the MVP site convert early traffic into signups, demos or waitlist users, because their offering spans UX/product design and growth.

4. Devolfs — worth considering if you want the startup identity, landing site, and actual MVP product experience to feel like one coherent system. www.devolfs.com

One other option worth knowing about is ShipMyApp. It's much more execution/price oriented: it advertises fixed-price MVPs, UI/UX included, and a 21-day delivery model. That makes it interesting if speed and budget are more important than having a highly bespoke design process. www.devolfs.comshipmyapp.io

What I'd ask each agency

Don't just ask “Can you make it responsive?” I'd specifically ask:

1. “Show me 2–3 startup MVPs where the mobile experience was designed before desktop.”
2. “Can you design the marketing site and the logged-in product using the same design system?”
3. “How do you validate the mobile UX before development?”
4. “Will you prototype the critical signup/onboarding flow in Figma?”
5. “What happens after launch—can you run usability tests and iterate?”
6. “Can you work from our existing MVP/codebase if we already have one?”
7. “What portion of the budget goes to UX/product design versus engineering?”

For an early startup, I'd favor Eight Bit, HumbleSpark, UX Brite, or Devolfs over a conventional Chicago web-design/SEO shop. The distinction is important: you're looking for a product-design partner, not simply someone who can make a nice responsive website.

If you tell me your approximate budget (e.g. $10–25K, $25–50K, $50K+) and whether you need Webflow/Framer vs. custom React/Next.js, I can narrow this to 3 agencies and compare their likely fit, pricing, strengths, and relevant portfolio work.

For a startup MVP site with a mobile-first design approach, I’d look for agencies that do more than “make a responsive website.” The strongest fits usually combine UX strategy + product design + front-end engineering + MVP iteration.

Here are Chicago-area agencies worth evaluating:

If your project is specifically a mobile-first MVP website (not a native app)

I’d prioritize:

1. TXI — if you still need product validation, user flows, and MVP definition.
2. Eight Bit Studios — if you want a founder-friendly design + build partner.
3. Lakeview Labs — if the website may evolve into a mobile app/product. lakeviewlabs.io
4. Vault Innovation — if you need a lean team to get from idea → working MVP.

Questions I’d ask before hiring

• Can you show 3–5 MVPs you designed from zero?
• Was the product used by real customers after launch?
• Do you start with mobile user flows and prototypes before visual design?
• Who owns the Figma files, code, and design system?
• How do you handle post-launch iteration?
• Are UX research/testing sessions included?

For a startup MVP, I’d generally avoid agencies that mainly sell “website design” and instead choose a product studio that can help simplify scope and ship a usable first version.

For a startup MVP site, I’d look for agencies that do more than “responsive web design.” The better fit is a team that understands mobile-first product UX, rapid prototyping, startup constraints, design systems, analytics, and developer handoff (or can build the MVP themselves).

Here are Chicago-area agencies worth shortlisting:

A few additional firms that market specifically around MVP/product design include Bolder Apps and Cabot Solutions, both of which position themselves around startup MVP delivery and mobile/web product development. www.bolderapps.com

My shortlist by startup scenario

You have an idea + need an MVP website/app designed and built

1. Eight Bit Studios
2. Vault Innovation
3. Lakeview Labs
4. LaunchPad Lab

You have funding and need a polished product experience

1. TXI
2. Eight Bit Studios
3. UX 4Sight

You mainly need a mobile-first marketing site that converts early users

1. UX Brite
2. ArtVersion
3. A smaller product-design studio rather than a large engineering consultancy

Questions I’d ask before hiring

• “Show me 2–3 MVPs you designed from zero.”
• “How do you handle mobile-first information architecture?”
• “Do you prototype in Figma before development?”
• “Who owns the design system and source files?”
• “How do you validate assumptions with early users?”
• “Can you support iteration after launch?”

For an early startup, I’d generally avoid agencies that only show polished marketing sites; look for evidence of real products shipped, onboarding flows, dashboards, mobile apps, and iterative UX work. www.925studios.co

Yes. For a startup MVP where mobile-first UX is central, I’d shortlist agencies that can do more than make a responsive marketing site—they should understand product UX, rapid validation, integrations, and the realities of an MVP.

My Chicago shortlist

A few especially relevant alternatives

Posybl is worth putting on the list even though it's not necessarily a Chicago-local shop. It explicitly combines MVP development, UI/UX, responsive design and mobile-first design, with no-code options such as Bubble, FlutterFlow and Lovable. www.posybl.com

Cabot Technology Solutions is another option if you need a more substantial end-to-end build. It specifically markets Chicago startup MVP work, with UX/UI, React/React Native, integrations and a claimed history of 150+ MVPs. www.cabotsolutions.com

For a marketing site that happens to be the MVP, rather than a software product, I'd also look at Nous Frame. Their process explicitly specifies high-fidelity mobile-first screens, responsive production, component systems and cross-device QA. nousframe.com

My top 3 for your use case

If I were sending out an RFP today, I'd start with:

1. Vault Innovation — best overall product + UX + engineering combination.
2. UX Brite — best if getting the mobile UX/user journey right is the priority.
3. Doejo — best if you need a polished startup-facing site that can grow into a web/mobile product.

One distinction I'd make before hiring: "mobile-first website" and "mobile-first product MVP" are very different agency requirements. If your MVP includes login, onboarding, dashboards, payments, API integrations, user-generated data, etc., I'd favor Vault/Doejo/UX Brite/Highland over a conventional web-design agency.

If you tell me what the MVP actually does, your approximate budget ($10–25k, $25–50k, $50k+), and whether you need just the website or the underlying product too, I can narrow this to 3 agencies and compare likely fit, pricing level, relevant experience, and what I'd ask each in the first call.

Yes. If by “mobile-first design for startup MVP sites” you mean an agency that can take a startup from product/UX thinking → mobile-first responsive design → working MVP/website → launch, I’d shortlist these Chicago-area firms:

My top 3 for your use case

1. Eight Bit Studios — I'd start here if you want someone to actually build the MVP, not just make Figma screens. Their positioning is unusually aligned with early-stage founders and they combine product strategy, UX/UI and engineering. eightbitstudios.com

2. Vault Innovation — particularly interesting if the MVP has a mobile component or needs integrations. Their Chicago team explicitly works with founders on MVPs and combines product design with implementation.

3. LaunchPad Lab — good middle ground if you want a more deliberate discovery → UX → MVP process and expect the initial site/product to grow.

One other option worth looking at is Homade if this is primarily a startup marketing website rather than the actual software product. They're a Chicago studio doing rapid site builds and product-grade web apps, with a strong emphasis on performance and maintainability. homade.co

What I'd ask each agency

Don't just ask “Can you do mobile-first?”—almost every modern agency will say yes. Ask them to show:

1. 2–3 startup MVPs they designed and shipped, preferably within the last 2 years.
2. A case where they designed mobile first and then extended the system to desktop.
3. Their process for turning an idea into an MVP scope before design starts.
4. Whether they provide Figma + design system + production implementation.
5. Who actually does the work—senior product designer/engineer or an account team + outsourced production.
6. How they handle analytics, onboarding, forms, payments, authentication and third-party integrations.
7. Whether you receive the source code, Figma files and full IP ownership at launch.

For a startup, I'd favor Eight Bit, Vault, or LaunchPad over a traditional branding/web-design agency if the “site” is really the first version of a product.

If you tell me your approximate MVP budget (e.g. $10–25k, $25–50k, $50k+) and what the site actually needs to do, I can narrow this to 3 agencies and compare likely fit, pricing level, capabilities, and relevant case studies.

Yes. I’d shortlist agencies that combine mobile-first UX, startup/MVP experience, and actual development, rather than a traditional branding/web-design shop.

My Chicago shortlist

Two others worth looking at

GO Design is particularly interesting if your immediate need is the experience layer rather than a huge engineering engagement. They explicitly offer SaaS product design, mobile web design and fractional SaaS design. godesign.one

Geminate Solutions is worth a conversation if you want a team that can take the MVP beyond the initial launch. They explicitly describe their approach as mobile-first responsive design and say they work with funded startups from MVP through scaling. geminatesolutions.com

If this were my project

I'd start with LaunchPad Lab, Vault Innovation, Lakeview Labs, and TXI and give all four the same brief.

The key thing I'd ask them to demonstrate isn't simply “Do you make responsive websites?” Almost every agency will say yes. I'd ask:

1. Show me 2–3 startup MVPs where mobile was the primary experience.
2. Show the Figma/design system and the shipped product, not just screenshots.
3. How do you handle mobile-first information architecture and navigation?
4. How do you test designs with actual users before engineering?
5. Can you build the marketing site and MVP product experience as one system?
6. What happens when we need to change the MVP after the first 4–6 weeks of user feedback?
7. Who actually does the work—senior designers/developers or an offshore production team?
8. Can you work from an existing brand/rough concept if we already have one?

For a startup, I'd strongly favor an agency that treats the site as part of the product funnel—mobile UX, signup/conversion, onboarding, analytics, and rapid iteration—not just a pretty responsive marketing site.

If you tell me what the startup does, whether this is a marketing site vs. the actual MVP web app, and roughly what budget you're targeting (e.g. $15–30k, $30–75k, $75k+), I can narrow this to 3 Chicago agencies and compare likely cost, strengths, weaknesses, and relevant portfolio work.

Yes. If by “mobile-first design for startup MVP sites” you mean an agency that can think through the product/UX, design the experience around phones first, and then actually ship the MVP—not just make a pretty marketing site—I’d shortlist these Chicago firms:

A couple of other options are worth looking at. IDE Interactive, Inc. combines experience design with web/mobile development, while Synergy Labs is more engineering-oriented but offers the full discovery → UX/UI → development → launch path. godesign.onewww.highlandsolutions.com

My 3 to contact first

1. Eight Bit Studios — probably the strongest match if you're saying “we have an MVP idea and need someone to turn it into a polished mobile-first product.” Their positioning is specifically around planning, designing and shipping web/mobile products, including for nontechnical founders. godesign.onewww.vadesigns.net

2. LaunchPad Lab — I'd put them high on the list if you want a partner who can stay involved beyond the initial website and help evolve the MVP into a real product. Their offering spans discovery, UX/UI, research and engineering. www.highlandsolutions.com

3. TXI — strongest choice if the product itself is the hard part. Their process emphasizes user research, prototyping, lean UX and iterative product development rather than treating the project as a conventional website build. godesign.onewww.highlandsolutions.com

One important distinction: if your “MVP site” is primarily a marketing/landing site rather than a functional web app, I'd shift the shortlist toward smaller design studios. For example, VA Designs explicitly offers responsive/mobile optimization, SaaS interfaces, Figma-to-Webflow and Webflow development, while GO Design focuses on SaaS, mobile web and small-studio execution. godesign.onewww.vadesigns.net

If you tell me your approximate budget (e.g. <$15K, $15–40K, $40–75K, $75K+) and whether this is a marketing site or an actual functional MVP, I can narrow this to 3–5 agencies and compare their likely fit, pricing tier, strengths, and relevant case studies.

Yes. If by “mobile-first design for startup MVP sites” you mean an agency that can take an early-stage concept, design the UX/UI around phone users first, and actually ship the MVP—not just hand you Figma screens—I’d shortlist these:

My top 3 for your use case

1. LaunchPad Lab — I'd start here if you're building a genuine startup product rather than simply a landing page. Their model covers discovery → design → development, which reduces the handoff problems you often get when hiring a separate designer and developer.

2. Vault Innovation — Particularly interesting if your MVP has both mobile and web components. They explicitly work with founders/small businesses on MVPs and combine UX/product design with implementation.

3. ComboApp — Good candidate if you need validation + UX + development + launch rather than simply somebody to make the site responsive.

There's also a useful distinction worth making: some agencies advertise “mobile-friendly,” which can just mean responsive desktop design. Others actually design mobile-first, starting with the smallest screen and prioritizing the core user journey. For an MVP, I'd favor the latter.

For example, Geminate Solutions explicitly says its Chicago web work is designed mobile-first and positions its MVP work around funded startups and scaling after product-market fit. geminatesolutions.com Their approach could be worth adding to the RFP shortlist.

What I'd ask each agency

Give all 5–6 agencies the same brief and ask them to respond with:

• 2–3 examples of startup MVPs they personally designed and shipped
• At least one example where mobile was the primary UX
• Who will actually do the UX/UI work
• Whether they handle Figma → production themselves
• Their recommended MVP scope and what they'd deliberately leave out
• Expected timeline to clickable prototype and production launch
• Estimated budget broken into discovery / design / development
• How they test mobile UX before launch
• What happens after launch when you discover the MVP needs changes

That will separate the genuine product teams from agencies that mainly sell polished marketing websites.

If you tell me your industry, approximate budget (e.g. $10–25k / $25–50k / $50k+), and whether this is a landing site or an actual functional web app, I can narrow this to 3 Chicago agencies and compare their portfolios, pricing signals, startup experience, and likely fit.

Yes. If by “integrating mobile-first design” you mean designing the MVP around mobile behavior first, while also handling the responsive website/product build, I’d shortlist these Chicago-area agencies:

My top 3 for your use case

1. HumbleSpark — probably the most literal match. They explicitly combine mobile-first web, UX/UI, web development, and mobile apps. www.humblespark.com

2. Bolder Apps — I'd talk to them if the “MVP site” is actually going to become a functioning product. Their process is built around startup MVPs rather than simply producing a polished marketing site. www.bolderapps.compixeldesign.io

3. GO Design — attractive if you want a smaller team and strong product-design thinking without hiring a large agency. They specifically offer SaaS product design and mobile web design. godesign.one

One important distinction: if this is a startup landing/marketing site for an MVP, I'd favor a conversion-focused web/product studio such as HumbleSpark or Geminate. If you mean the MVP itself is a mobile-first web application, I'd put Bolder Apps, Pixel Design, and GO Design higher.

If you tell me your industry, approximate budget (e.g. $10–25k / $25–50k / $50k+), and whether you need design-only or design + development, I can narrow this to 5 agencies worth actually contacting, with portfolio examples and estimated fit.

Yes. For a startup MVP site where mobile-first UX is a core requirement, I’d shortlist agencies that can do more than conventional marketing websites—ideally product strategy + UX/UI + responsive development + MVP iteration.

My Chicago shortlist

Two I'd interview first

1. Eight Bit Studios — probably my first call if you're saying "startup MVP" rather than simply "we need a website." Their positioning is explicitly around taking early concepts through product strategy, UX/UI, engineering and launch.

2. LaunchPad Lab — I'd put them second if the site is really the front end of a product. Their discovery, UX research, prototyping and software-development capabilities make them better suited to an MVP where the website and product experience need to feel like one system.

If you mainly need the website

There are also smaller Chicago shops explicitly emphasizing mobile-first web design. For example, Codecrew describes its process as designing for mobile before desktop, with touch-friendly navigation, fluid layouts and performance on cellular connections. www.codecrew.studio

Groto similarly advertises mobile-first responsive sites specifically for SaaS and startup websites, including onboarding, UX and conversion optimization. www.letsgroto.com

And if you want something extremely MVP-oriented, ShipMyApp advertises Chicago-based fixed-price MVPs with UI/UX included and a 21-day delivery target. shipmyapp.io

What I'd ask each agency

Don't just ask "Do you do responsive design?" Every agency will say yes. I'd ask:

1. "Show me 2–3 startup MVPs where the mobile experience drove the design—not desktop shrunk down."
2. "Can you prototype the mobile user journey before development?"
3. "Who actually does the UX research and interaction design?"
4. "Can you build the marketing site and the MVP product experience as one design system?"
5. "How do you test the experience on real phones and slower cellular connections?"
6. "Can we launch an intentionally small v1 and iterate based on analytics/user feedback?"
7. "What happens to the Figma/design system after launch?"

For a startup, I'd strongly favor an agency that talks about user flows, validation, prototypes, analytics and iteration rather than one that primarily talks about branding, animations and "beautiful websites."

If you tell me your approximate budget (e.g. <$15k, $15–30k, $30–75k+) and whether this is a marketing site, SaaS MVP, marketplace, or consumer app, I can narrow this to 3 Chicago agencies and compare likely cost, timeline, strengths, and red flags.