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One & Zero

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4.4/5 (6 reviews)
+16469421656 info@onezeronyc.com Visit Website

About One & Zero

One & Zero is a digital marketing company based in New York. Their methodology is based on proven, organic Internet strategies and best practices. If you choose to work with them, your investment will develop long-term results and profits for your company. They can provide you with a complete range of digital services. They truly understand our clients and their users.

Last updated May 13, 2026

Services

Mobile App Development Web Development VR App Development AR App Development

Industries Served

Sports & Fitness Fashion & Apparel Events & Event Management Healthcare Travel & Hospitality

One & Zero Reviews

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Performance testing that identified a latency issue three weeks before our biggest traffic event

Aarav Mehta / Chief Data Officer - Zenith FinServ Ltd
Verified
Feb 11, 2026

Project summary: Dynamic pricing had been a manual process for years. We knew the revenue management opportunity was significant but lacked the technical capability to build the models and connect them to our booking engine.

What made the most difference in practice was the quality of the engineering judgment on this team. Not the ability to execute a specification — that is a baseline expectation. The ability to recognise when a specification was suboptimal, explain why, propose an alternative, and support the client in making a decision about it. That consultative dimension elevated the output beyond what the brief described and resulted in a product that is more fit for purpose than the one we had originally specified.

PROS

Delivery timeline that proved achievable rather than optimistic, estimation accuracy that reflected real analysis rather than competitive bidding, scope discipline that prevented the feature creep we had experienced before

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

4.5
Overall
4.5
Quality
4.5
Schedule
4.0
Cost
4.0
Communication
Project TypeQuality Assurance & Testing
IndustryTravel & Hospitality
Project Cost$10,000 to $49,999
DurationApr 2025 – Jan 2026

Questions & Answers

Please describe your company, your role, and the industry you operate in.
As Chief Data Officer at Zenith FinServ Ltd I oversee technology investment and delivery across our Travel & Hospitality operations in Bangalore, India. We are a commercially focused business and our technology choices are always evaluated in terms of their direct contribution to business outcomes rather than technical elegance alone.
What specific problem or business challenge led you to hire this company?
Our platform had been maintained by a previous vendor for three years and the accumulated technical debt had reached a point where delivery velocity had dropped to a fraction of what it should have been. We needed fresh engineering expertise and a structured plan to address the underlying issues.
What services did the company provide for your project?
Primarily Quality Assurance & Testing, 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?
Thoroughly and precisely. The requirements document they produced was detailed enough that our QA team used it directly to write acceptance criteria. Every user story had a defined business objective attached. Nothing was left to interpretation. That discipline in the requirements phase paid dividends throughout development and testing.
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 to both. There was a single sprint where a dependency on a third-party API introduced a one-week delay. The team identified it three weeks in advance, presented two mitigation options, and we agreed on an approach that recovered the schedule within the same sprint cycle. That level of foresight is what separates good project management from reactive problem management.
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 Quality Assurance & Testing 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 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?
Yes. I would add the context that this is not the cheapest option in the market and they are selective about the engagements they take on. If your primary criterion is price, there are alternatives. If you want a technology partner who can be trusted with a complex Quality Assurance & Testing programme in the Travel & Hospitality space and will deliver against a serious brief, this is the team.

Company Info

Founded 2017
Employees 10 - 49
Hourly Rate $200 - $300
Client Rating 4.4/5 (6 reviews)

Rating Breakdown

Quality
4.6
Schedule
4.3
Cost
4.3
Communication
4.6

FAQs

What's the easiest way to actually get in touch with One & Zero?
Most businesses reach One & Zero through its website, a direct email, or a contact form — any of which works for discussing what you need, booking an initial conversation, or asking for a rough estimate. For context, it has experience across industries such as Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare, and its average project cost is reported at $2500000+.
Has One & Zero actually shipped a SaaS product before?
It's a common line of work for a company like One & Zero — multi-tenant architecture, subscription billing hooked up properly, and cloud-native deployment built for a product meant to scale as a service rather than a one-off build. For context, it has experience across industries such as Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare, and its average project cost is reported at $2500000+.
What's actually in One & Zero's technical toolkit?
The exact stack shifts by project, but One & Zero commonly works across things like React, Angular, Vue.js, Node.js, Python, .NET, Java, PHP, Flutter, React Native, native iOS and Android, and cloud platforms like AWS and Azure. For context, it has experience across industries such as Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare, and its listed capabilities span VR App Development, Web Development, Mobile App Development and AR App Development.
Can I just hire developers from One & Zero to sit alongside my own team?
Usually, yes — a dedicated developer arrangement is a common option with firms like One & Zero, where you get engineers working exclusively on your project as an extension of your in-house team rather than as a separate outsourced unit. For context, it has experience across industries such as Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare, and its average project cost is reported at $2500000+.
Does One & Zero actually build with AI, or just talk about it?
Plenty of modern software teams, One & Zero included, now build real AI and machine learning features — chatbots, predictive models, computer vision, and automation that goes beyond simple rule-based scripts. For context, it has experience across industries such as Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare, and its average project cost is reported at $2500000+.
What kinds of industries has One & Zero actually built for?
One & Zero has delivered projects across a range of different industries, including Events & Event Management, Sports & Fitness, Travel & Hospitality, Fashion & Apparel and Healthcare.
Can One & Zero take on an old, outdated system rather than starting from scratch?
Modernizing legacy software is usually within scope for a firm like One & Zero — re-platforming, refactoring old code, and moving things onto current frameworks or cloud infrastructure without necessarily rebuilding everything from zero. For context, its listed capabilities span VR App Development, Web Development, Mobile App Development and AR App Development, and its typical hourly rate is around $200 - $300.
What makes One & Zero worth considering over other options?
What tends to set One & Zero apart usually comes down to some mix of technical depth, relevant industry experience, how clients describe working with them, their development approach, communication habits, and whether they can actually deliver something that scales. Founded in 2017, the company has built a track record of delivering projects across various industries.
What should I expect to pay to work with One & Zero?
What One & Zero charges comes down to a handful of variables — how complex the project is, the number of development hours involved, the tech stack required, team size, and which engagement model you pick. Based on available data, One & Zero's typical hourly rate is around $200 - $300, with an average project cost of $2500000+.

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