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Calls9

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4.2/5 (6 reviews)
+441133506441 hello@calls9.com Visit Website

About Calls9

?They build digital expertise for the web & mobile that drive company growth & increase team productivity. With growing demand for marketing & technology resources, Calls9 provide businesses & organizations innovative digital solutions that can be started quickly and easily. If you have a digital project you require help defining, designing or developing they would love to hear from you.

Last updated May 13, 2026

Services

Mobile App Development Web Development Custom Software Development

Industries Served

Events & Event Management Human Resources Sports & Fitness Advertising & Marketing Mining & Metals Construction

Calls9 Reviews

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The outcome we specified, delivered the way we needed it, by people we would hire again

Dominic Fairfax / Head of Digital Transformation - Arcadian Consulting Ltd
Verified
Jan 08, 2026

Project summary: Our engineering capacity was committed to maintaining existing systems and could not absorb a net-new build of this complexity. An external partner with the right skills was the only viable option.

The integration layer was the part of the project I was most concerned about going in. Our system landscape is complex, several of the upstream APIs we relied on were poorly documented, and two third-party vendors had a history of unpredictable response times on integration questions. This team managed all of that. They documented what the upstream vendors could not, built resilience into the integration architecture where the upstream behaviour was unreliable, and delivered a solution that works as specified in production. I could not have asked for more.

PROS

Architectural decisions designed for longevity rather than just the current brief, thorough automated test coverage, post-launch stability that validated every technical choice made during discovery

CONS

The quality of documentation they produce means our team needed to set aside dedicated review time to do it justice — a minor scheduling point rather than a genuine criticism

4.0
Overall
4.0
Quality
4.5
Schedule
4.0
Cost
3.5
Communication
Project TypeIndustry-Specific Solutions
IndustryConstruction
Project Cost$10,000 to $49,999
DurationMay 2025 – Dec 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Arcadian Consulting Ltd operates in the Construction sector with headquarters in London, UK. In my role as Head of Digital Transformation 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?
The immediate problem was that our Industry-Specific Solutions capability had become the bottleneck limiting our ability to grow. Every feature request, every new client requirement, every internal initiative was delayed by a platform that had been extended beyond its original design. We needed a rebuild, not a patch.
What services did the company provide for your project?
End-to-end Industry-Specific Solutions delivery with particular depth in the integration and data migration components, which were the highest-risk elements of the programme. They supplemented this with a dedicated QA resource throughout development and a documented runbook for our operations team at handover.
Why did you choose this company over other providers you considered?
The quality of the questions they asked during the briefing process was the first indicator. Vendors who ask precise questions in the sales phase tend to apply the same rigour during delivery. That hypothesis proved accurate. The technical proposal was substantive, the team structure was senior throughout, and the pricing was transparent.
How clearly did the company understand your requirements and business goals?
Extremely well, in part because they had relevant Construction experience that reduced the context-setting overhead significantly. They understood the domain vocabulary, asked the right questions, and translated business requirements into technical specifications with a fidelity that meant the development phase had very few clarification cycles.
How was your overall experience with their communication and project management?
Outstanding. The discipline around asynchronous communication was particularly effective given the time zones involved between London, UK and the delivery team. Written updates were specific and consistent, response times were same-day for anything that required a decision, and nothing fell through the cracks across a six-month engagement.
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 Industry-Specific Solutions 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 post-launch behaviour. Some vendors consider go-live to be the end of their professional obligation. This team treated it as the transition to a different kind of engagement. The hypercare period was substantive, the documentation was thorough and genuinely useful, and they checked in proactively at the thirty-day and ninety-day marks to review production metrics with us.
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 Industry-Specific Solutions programme in the Construction space and will deliver against a serious brief, this is the team.

Company Info

Founded 2011
Employees 2 - 9
Hourly Rate N/A
Client Rating 4.2/5 (6 reviews)

Rating Breakdown

Quality
4.2
Schedule
4.1
Cost
4.2
Communication
4.1

FAQs

Does Calls9 actually build with AI, or just talk about it?
Plenty of modern software teams, Calls9 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 served clients in United-kingdom, and its listed capabilities span Custom Software Development, Mobile App Development and Web Development.
What's actually in Calls9's technical toolkit?
The exact stack shifts by project, but Calls9 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 Sports & Fitness, Events & Event Management, Mining & Metals, Human Resources, Advertising & Marketing and Construction, and its average project cost is reported at $2500000+.
What's the easiest way to actually get in touch with Calls9?
Most businesses reach Calls9 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 served clients in United-kingdom, and it has experience across industries such as Sports & Fitness, Events & Event Management, Mining & Metals, Human Resources, Advertising & Marketing and Construction.
What kind of software work does Calls9 take on?
Calls9 typically covers the standard range of software development work — mobile apps, web platforms, custom internal tools, UI/UX design, cloud infrastructure, AI integrations, and larger enterprise builds. Its core focus areas include Custom Software Development, Mobile App Development and Web Development.
Can I just hire developers from Calls9 to sit alongside my own team?
Usually, yes — a dedicated developer arrangement is a common option with firms like Calls9, 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, its listed capabilities span Custom Software Development, Mobile App Development and Web Development, and it reports a team size of 2 - 9 professionals.
What kinds of industries has Calls9 actually built for?
Calls9 has delivered projects across a range of different industries, including Sports & Fitness, Events & Event Management, Mining & Metals, Human Resources, Advertising & Marketing and Construction.
Can Calls9 take on an old, outdated system rather than starting from scratch?
Modernizing legacy software is usually within scope for a firm like Calls9 — 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 Custom Software Development, Mobile App Development and Web Development, and its typical hourly rate is around N/A.
Is Calls9 more of an offshore setup or a local team?
That depends on where Calls9 is based and who they primarily serve — some firms like this operate fully offshore, some are local-first, and plenty run a hybrid model that mixes both. For context, it has experience across industries such as Sports & Fitness, Events & Event Management, Mining & Metals, Human Resources, Advertising & Marketing and Construction, and it reports a team size of 2 - 9 professionals.
Will Calls9 sign an NDA before we even discuss the project in detail?
Most professional shops, including Calls9, expect to sign a Non-Disclosure Agreement before getting into specifics — it's a fairly standard ask and a reasonable one to make before sharing anything sensitive. For context, its listed capabilities span Custom Software Development, Mobile App Development and Web Development, and it has served clients in United-kingdom.
What happens with Calls9 after the project actually launches?
Like most established software teams, Calls9 typically sticks around post-launch for ongoing maintenance — bug fixes, performance tuning, security patching, new feature work, and general technical support. For context, its listed capabilities span Custom Software Development, Mobile App Development and Web Development, and it has been operating since 2011.

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