Flatstack

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4.1/5 (12 reviews)
+18884999352 contact@flatstack.com Visit Website

About Flatstack

It is a web & mobile application development company. Specializing in staff development, their team of experts will work with you to balance your team so you can develop quickly. They believe in the level, connected world which has made it feasible to develop a globally. They have a distinct and skilled team that produces every year. All of their teams take on their individual personality and love what they do.

Services

Mobile App Development Web Development UI-UX Design Custom Software Development SEO

Industries Served

Agriculture Legal Services

Flatstack Reviews

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Custom modules that fit our operational processes rather than forcing us to change them

Ji-Woo Park / VP of Engineering - Seoul Digital Corp
Verified
Feb 25, 2026

Project summary: Our internal product thinking was strong but our execution capability in this specific technology domain was limited. We needed depth, not generalism.

We gave this team an aggressive timeline, a technically complex scope, and a client-side project team that was stretched thin and not always available at the speed the engagement required. They absorbed all of that gracefully. Where they needed input they were precise about what they needed and when. Where they could proceed independently they did. The result was a delivery that landed on time despite the constraints on our side, which I regard as evidence of genuine professional maturity.

PROS

Commercially transparent throughout — no hidden assumptions, no bill shock at the end, change requests that were fair and clearly explained rather than used as a margin-recovery mechanism

CONS

Pipeline availability for kickoff required a few weeks of lead time — in hindsight that selection pressure means you are working with a team that is in demand for the right reasons

4.0
Overall
4.0
Quality
3.5
Schedule
3.5
Cost
4.0
Communication
Project TypeERP Development
IndustryAgriculture
Project Cost$50,000 to $149,999
DurationAug 2025 – Nov 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Seoul Digital Corp operates in the Agriculture sector with headquarters in Seoul, South Korea. In my role as VP of Engineering I am accountable for the full technology agenda — infrastructure, product, and vendor relationships. We are a commercially driven organisation and every technology decision is evaluated against a clear business case before it is approved.
What specific problem or business challenge led you to hire this company?
A competitive threat had accelerated our roadmap. We had planned a significant ERP Development investment for the following year. External pressure moved that timeline forward by six months and required us to find an external partner rather than attempting to build internally in the time available.
What services did the company provide for your project?
Primarily ERP Development, with adjacent work in solution architecture and quality assurance. They were responsible for the full build from requirements through to go-live, including integration with four existing systems in our technology landscape. The breadth they covered without requiring additional vendors was commercially and logistically valuable.
Why did you choose this company over other providers you considered?
We had a failed engagement behind us and were more rigorous in our selection process as a result. We asked detailed questions about how they managed scope change, how they handled estimation, and how they communicated problems. The answers were specific, evidenced, and consistent across the team members we spoke to. That gave us confidence that the process was real rather than rehearsed.
How clearly did the company understand your requirements and business goals?
Comprehensively. The discovery phase they ran was more thorough than anything we had experienced with previous vendors. They challenged requirements that were vague or contradictory, proposed alternatives where our initial thinking was limiting, and produced a functional specification that our internal stakeholders agreed was the clearest articulation of the product they had seen written down.
How was your overall experience with their communication and project management?
Communication was proactive, timely, and appropriately calibrated. Technical updates for the engineering audience, executive summaries for the steering group, risk flags with proposed mitigations rather than just problem statements. The fortnightly sprint reviews gave our stakeholders visibility without requiring them to attend every working session.
Did the company deliver the project on time and within your expected budget?
The project landed on time. The budget was managed within the agreed ceiling, which included one client-driven scope addition that was quoted fairly and handled without affecting the original delivery stream. The discipline around budget transparency throughout meant there was no surprise at invoice stage.
What tangible results or business impact have you seen since the project was completed?
The ROI case we presented to our board was conservative by design. Current performance against the financial model suggests we will hit the projected payback point in under twelve months against an eighteen-month target. The operational efficiency gains in particular have exceeded the model, in part because the quality of the data the new platform generates supports decisions that the previous system could not.
What did you like most about working with this company?
The continuity of the team. The engineers who participated in the discovery sessions were the engineers who built the system. That consistency of institutional knowledge across a six-month project has a value that is difficult to quantify but easy to notice when it is absent. Every conversation built on the previous ones.
Would you recommend this company to others, and would you work with them again?
Unreservedly. We are in active scoping conversations for a second engagement and I expect this to develop into a multi-year partnership. For any organisation in the Agriculture sector looking for ERP Development expertise combined with genuine delivery discipline, I would put this team at the top of the evaluation list.

Performance-first web development that Google Core Vitals confirmed was the right approach

Kelsey Drummond / Director of Digital Health - Crestline Health Partners
Verified
Feb 19, 2026

Project summary: Our client portal had been built in 2017 and had not received meaningful investment since. Clients were contrasting it unfavourably with the portals of our competitors in pitches.

I came into this engagement as a sceptic. We had been through a failed implementation with a previous vendor and I had high standards for what evidence of competence looked like before I would trust a partner with our core systems. This team earned that trust progressively — through the quality of the discovery documentation, the rigour of the technical proposals, the consistency of the sprint deliveries, and ultimately the stability of the production system. I no longer lead with scepticism when recommending them.

PROS

Collaborative culture that made the team feel like a genuine extension of our organisation, strong asynchronous communication across time zones, zero-drama handling of the inevitable mid-project changes

CONS

Their insistence on a detailed functional specification before development began felt like friction at the time. In retrospect, it was the reason the development phase ran without the ambiguity that has derailed similar projects for us previously

4.5
Overall
4.0
Quality
4.5
Schedule
4.5
Cost
4.5
Communication
Project TypeWeb Development
IndustryLegal Services
Project Cost$150,000 to $499,999
DurationFeb 2025 – Dec 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I lead technology at Crestline Health Partners, a growth-stage Legal Services business based in Houston, USA. As Director of Digital Health my remit spans product engineering, platform operations, and strategic vendor partnerships. We had reached an inflection point where our internal capacity was not sufficient to execute our roadmap at the pace our market required.
What specific problem or business challenge led you to hire this company?
We had a defined product vision for our next phase of growth in the Legal Services market but lacked the engineering depth internally to execute it. The Web Development requirements in particular required specialist experience that we could not realistically recruit for on the timeline our business plan required.
What services did the company provide for your project?
The core engagement was Web Development delivery, though their scope expanded to include technical consultancy during discovery that materially improved our requirements. They also took ownership of the third-party integration workstream that had been a coordination challenge in previous projects, removing that complexity from our internal team entirely.
Why did you choose this company over other providers you considered?
We had a failed engagement behind us and were more rigorous in our selection process as a result. We asked detailed questions about how they managed scope change, how they handled estimation, and how they communicated problems. The answers were specific, evidenced, and consistent across the team members we spoke to. That gave us confidence that the process was real rather than rehearsed.
How clearly did the company understand your requirements and business goals?
Better than we managed ourselves going in. The workshops they facilitated surfaced assumptions we had not examined and exposed three requirements that were in direct conflict with each other. Resolving those before development began saved us what would certainly have been significant rework later in the project.
How was your overall experience with their communication and project management?
Communication was proactive, timely, and appropriately calibrated. Technical updates for the engineering audience, executive summaries for the steering group, risk flags with proposed mitigations rather than just problem statements. The fortnightly sprint reviews gave our stakeholders visibility without requiring them to attend every working session.
Did the company deliver the project on time and within your expected budget?
Yes. I had privately built a contingency expectation into my planning given the project complexity and the number of integrations involved. None of that contingency was needed. The delivery landed on the agreed date and the final invoice matched the approved budget to within a fraction of a percent. That outcome is rarer than the industry acknowledges.
What tangible results or business impact have you seen since the project was completed?
Quantifying the impact precisely is complicated by other variables in our business, but the metrics we can attribute directly to the Web Development work are meaningful: session duration up, conversion rate up, error rate down, and our NPS for the digital touchpoint has improved by eleven points. Our account managers report that the new capability is coming up positively in client conversations.
What did you like most about working with this company?
The willingness to be direct. When our requirements were unclear they said so. When our priorities were contradictory they explained why. When a technical approach we had assumed was the right one turned out to have significant downsides, they told us before we had committed to it. That kind of intellectual honesty is what I look for in a long-term technology partner.
Would you recommend this company to others, and would you work with them again?
Yes, without reservation. I have already made two direct referrals within my Legal Services network — in both cases to peers facing Web Development challenges similar to ours. I gave those referrals with confidence because I knew the experience I described was reproducible, not the result of exceptional circumstances on our engagement.

FAQs

How much does it cost to hire Flatstack?
The cost of hiring Flatstack depends on factors such as project complexity, development hours, required technologies, team size, and engagement model. Based on available data, Flatstack's typical hourly rate is around $25 - $49, with an average project cost of $100000+.
Which industries does Flatstack serve?
Flatstack has experience working with businesses across multiple industries, including Travel & Hospitality, Legal Services, Insurance, Food & Beverage, Gaming & Gambling and Information Technology.
What technologies does Flatstack specialize in?
Depending on the project requirements, Flatstack may work with technologies such as React, Angular, Vue.js, Node.js, Python, .NET, Java, PHP, Flutter, React Native, iOS, Android, AWS, Azure, AI, and cloud platforms. For context, it has experience across industries such as Travel & Hospitality, Legal Services, Insurance, Food & Beverage, Gaming & Gambling and Information Technology, and its listed capabilities span SEO, Mobile App Development, Custom Software Development, UI-UX Design and Web Development.
How can I contact Flatstack for a project?
Businesses can contact Flatstack through its official website, email, or contact form to discuss project requirements, request a consultation, or receive a development estimate. For context, it has served clients in USA, and it reports a team size of 50 - 249 professionals.
Is Flatstack an offshore software development company?
Flatstack may operate as an offshore, onshore, or hybrid software development company depending on its location and the markets it serves. For context, it has served clients in USA, and its typical hourly rate is around $25 - $49.
What engagement models does Flatstack provide?
Flatstack may offer multiple engagement models such as fixed-price contracts, dedicated team hiring, and time-and-material billing, allowing businesses to choose the option that best fits their budget and project scope. For context, it has experience across industries such as Travel & Hospitality, Legal Services, Insurance, Food & Beverage, Gaming & Gambling and Information Technology, and it has served clients in USA.
Which countries does Flatstack serve?
Flatstack may serve clients across multiple countries and regions, including USA, depending on market demand and business partnerships.
Does Flatstack develop SaaS products?
Yes, Flatstack may offer SaaS product development services, including multi-tenant architecture, subscription billing integration, and cloud-native deployment for scalable software-as-a-service solutions. For context, its listed capabilities span SEO, Mobile App Development, Custom Software Development, UI-UX Design and Web Development, and its typical hourly rate is around $25 - $49.
How do I request a proposal from Flatstack?
You can request a proposal from Flatstack by submitting your project requirements through its website contact form, email, or by reaching out directly to discuss your business goals and receive a tailored development estimate. For context, it has experience across industries such as Travel & Hospitality, Legal Services, Insurance, Food & Beverage, Gaming & Gambling and Information Technology, and it has served clients in USA.

Company Info

Founded 2005
Employees 50 - 249
Hourly Rate $25 - $49
Avg. Project Cost $55,000+
Client Rating 4.1/5 (12 reviews)

Rating Breakdown

Quality
4.1
Schedule
4.0
Cost
4.0
Communication
4.0