The Call Stack Reviews

Professional team that made a complex project feel manageable

Neha Shah / Head of Product | Oct 07, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. The developers were knowledgeable and made a few suggestions that ended up saving us time and money.

We are already seeing better numbers than before the project. I would recommend The Call Stack to anyone looking for a dependable UI/UX Design partner.

Project summary

We engaged The Call Stack to redesign the user experience of our SaaS product. Scope included discovery workshops, development in two-week sprints and a short support period after launch. Overall it was a 8-month engagement.

Overall Rating 5.0
Quality 5.0
Schedule 5.0
Project Cost 5.0
Willing To Refer 5.0

Project Type:: UI/UX Design
Project Cost:: $50,000 to $149,999
Project Duration:: Nov 2025 - Jul 2026
Business Type:: Sports & Fitness
Location:: Bengaluru, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I'm the Head of Product at Horizon Sports Pvt Ltd, a Sports & Fitness company based in Bengaluru, India. I look after our technology and work closely with outside partners on bigger projects.

What specific problem or business challenge led you to hire this company?

We needed to redesign the user experience of our SaaS product, and we didn't have the in-house capacity to do it ourselves.

What services did the company provide for your project?

Mainly UI/UX Design. They also helped with the technical planning and a few integrations with our existing tools.

Why did you choose this company over other providers you considered?

We compared three or four agencies. The Call Stack asked the best questions and had good reviews from past clients.

How clearly did the company understand your requirements and business goals?

Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.

How was your overall experience with their communication and project management?

Communication was good overall and improved further once we settled into a routine.

Did the company deliver the project on time and within your expected budget?

Mostly. One milestone slipped by about a week, but the final delivery was on schedule and the budget held.

What tangible results or business impact have you seen since the project was completed?

We can now handle more volume without adding staff, which was the main goal.

What did you like most about working with this company?

That they were proactive — they suggested improvements instead of just doing what was asked.

Would you recommend this company to others, and would you work with them again?

Yes, I've already recommended them to a couple of people I know.

Good work overall, with a few bumps along the way

Sam Lloyd / Director | Sep 10, 2026

We got a good result in the end, but the road there had a few bumps. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later.

It has made a real difference to how our team works day to day. Their team changed one developer midway, which slowed things down for a couple of weeks. Happy to recommend them.

Project summary

We hired The Call Stack to build a supply chain traceability prototype on a permissioned blockchain. The project was split into milestones, with a working build shared at the end of each one. The project took roughly 4 months from kickoff to launch.

Overall Rating 3.5
Quality 4.0
Schedule 3.5
Project Cost 4.0
Willing To Refer 5.0

Project Type:: Blockchain Development
Project Cost:: Less than $10,000
Project Duration:: Mar 2026 - Jul 2026
Business Type:: Energy & Utilities
Location:: Cambridge, UK

Questions & Answers

Please describe your company, your role, and the industry you operate in.

Keystone Power Ltd is a Energy & Utilities business in Cambridge, UK. As Director, I was responsible for this project on our side and the main contact for The Call Stack.

What specific problem or business challenge led you to hire this company?

We had tried to do this internally and it stalled. We needed specialists to build a supply chain traceability prototype on a permissioned blockchain.

What services did the company provide for your project?

Mainly Blockchain Development. They also helped with the technical planning and a few integrations with our existing tools.

Why did you choose this company over other providers you considered?

They had relevant experience in Energy & Utilities and their proposal was the clearest of the ones we received.

How clearly did the company understand your requirements and business goals?

Well. There were a couple of points we had to clarify early on, but after that they were spot on.

How was your overall experience with their communication and project management?

Organised and transparent. Their project manager kept the project on track and flagged risks early.

Did the company deliver the project on time and within your expected budget?

It was delivered on time, and the final invoice matched the original estimate.

What tangible results or business impact have you seen since the project was completed?

It is still early, but the numbers are trending in the right direction and the system has been stable.

What did you like most about working with this company?

That they were proactive — they suggested improvements instead of just doing what was asked.

Would you recommend this company to others, and would you work with them again?

Yes, I've already recommended them to a couple of people I know.

Great team to work with — professional, responsive and reliable

Fatima Fernandes / Founder & CEO | Aug 30, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. They were upfront about what was realistic within our budget, which helped us prioritise the right features. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

The result looks great and performs well, and our internal team found it easy to take over. Happy to recommend them.

Project summary

We engaged The Call Stack to build iOS and Android apps for our customers, including booking, payments and push notifications. Scope included discovery workshops, development in two-week sprints and a short support period after launch. The engagement ran for about 9 months.

Overall Rating 4.5
Quality 4.5
Schedule 5.0
Project Cost 4.0
Willing To Refer 5.0

Project Type:: Mobile App Development
Project Cost:: Less than $10,000
Project Duration:: Oct 2025 - Jul 2026
Business Type:: Construction
Location:: Sharjah, UAE

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I work as Founder & CEO at Beacon Builders. We operate in Construction and most of our customers are in and around Sharjah, UAE.

What specific problem or business challenge led you to hire this company?

We had tried to do this internally and it stalled. We needed specialists to build iOS and Android apps for our customers, including booking, payments and push notifications.

What services did the company provide for your project?

Mobile App Development, including planning, development, testing and launch support.

Why did you choose this company over other providers you considered?

We compared three or four agencies. The Call Stack asked the best questions and had good reviews from past clients.

How clearly did the company understand your requirements and business goals?

They understood our goals quickly, partly because they had worked with Construction clients before.

How was your overall experience with their communication and project management?

Organised and transparent. Their project manager kept the project on track and flagged risks early.

Did the company deliver the project on time and within your expected budget?

It was delivered on time, and the final invoice matched the original estimate.

What tangible results or business impact have you seen since the project was completed?

It is still early, but the numbers are trending in the right direction and the system has been stable.

What did you like most about working with this company?

How easy they were to work with. They were responsive, honest and genuinely interested in our success.

Would you recommend this company to others, and would you work with them again?

Yes, I've already recommended them to a couple of people I know.

Honest advice and solid execution

Jessica Carter / Owner | Jul 29, 2026

The Call Stack did an excellent job for us. When we changed our minds on a couple of features halfway through, they handled it without fuss and were clear about the impact on cost and timeline. Their project manager kept things organised and was quick to flag anything that might affect the timeline.

The result looks great and performs well, and our internal team found it easy to take over. Happy to recommend them.

Project summary

The Call Stack was brought in to build internal tools on a low-code platform so our team could stop relying on spreadsheets. They also took care of integrations with a couple of third-party tools we already used. The project took roughly 7 months from kickoff to launch.

Overall Rating 5.0
Quality 4.5
Schedule 5.0
Project Cost 5.0
Willing To Refer 5.0

Project Type:: Low-Code / No-Code Development
Project Cost:: Less than $10,000
Project Duration:: Nov 2025 - Jun 2026
Business Type:: Nonprofit & NGO
Location:: Chicago, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I work as Owner at Crestview Alliance Inc. We operate in Nonprofit & NGO and most of our customers are in and around Chicago, USA.

What specific problem or business challenge led you to hire this company?

We had tried to do this internally and it stalled. We needed specialists to build internal tools on a low-code platform so our team could stop relying on spreadsheets.

What services did the company provide for your project?

Low-Code / No-Code Development, including planning, development, testing and launch support.

Why did you choose this company over other providers you considered?

Their pricing was fair and they were honest about timelines instead of just telling us what we wanted to hear.

How clearly did the company understand your requirements and business goals?

Well. There were a couple of points we had to clarify early on, but after that they were spot on.

How was your overall experience with their communication and project management?

Communication was good overall and improved further once we settled into a routine.

Did the company deliver the project on time and within your expected budget?

Yes, on time and within budget.

What tangible results or business impact have you seen since the project was completed?

We can now handle more volume without adding staff, which was the main goal.

What did you like most about working with this company?

The consistency. Same team, same standard, from the first week to the last.

Would you recommend this company to others, and would you work with them again?

Yes. They are a reliable Low-Code / No-Code Development partner.

A reliable long-term partner for our tech needs

Amanda Foster / Co-Founder & CTO | Jul 06, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. They were upfront about what was realistic within our budget, which helped us prioritise the right features. Even with the time zone difference, responses usually came the same day and we never felt left in the dark.

The result looks great and performs well, and our internal team found it easy to take over.

Happy to recommend them.

Project summary

We hired The Call Stack to build a supply chain traceability prototype on a permissioned blockchain. They also took care of integrations with a couple of third-party tools we already used. The project took roughly 2 months from kickoff to launch.

Overall Rating 5.0
Quality 5.0
Schedule 5.0
Project Cost 5.0
Willing To Refer 5.0

Project Type:: Blockchain Development
Project Cost:: Less than $10,000
Project Duration:: Mar 2026 - May 2026
Business Type:: Advertising & Marketing
Location:: San Jose, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I'm the Co-Founder & CTO at Kinetic Creative Inc, a Advertising & Marketing company based in San Jose, USA. I look after our technology and work closely with outside partners on bigger projects.

What specific problem or business challenge led you to hire this company?

We needed to build a supply chain traceability prototype on a permissioned blockchain, and we didn't have the in-house capacity to do it ourselves.

What services did the company provide for your project?

Blockchain Development, including planning, development, testing and launch support.

Why did you choose this company over other providers you considered?

We compared three or four agencies. The Call Stack asked the best questions and had good reviews from past clients.

How clearly did the company understand your requirements and business goals?

Well. There were a couple of points we had to clarify early on, but after that they were spot on.

How was your overall experience with their communication and project management?

Good. Weekly calls, regular updates and a shared board meant we always knew where things stood.

Did the company deliver the project on time and within your expected budget?

Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.

What tangible results or business impact have you seen since the project was completed?

It is still early, but the numbers are trending in the right direction and the system has been stable.

What did you like most about working with this company?

That they were proactive — they suggested improvements instead of just doing what was asked.

Would you recommend this company to others, and would you work with them again?

Definitely. We have already started talking about the next phase.

Professional UI/UX Design Team, Smooth Delivery From Start to Finish

Bec Murphy / Founder | Jun 01, 2026

We were happy with the final result. They shared working builds regularly, so we could test early and give feedback before things were locked in. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

The result looks great and performs well, and our internal team found it easy to take over. Estimates on a few features were optimistic and those took longer than planned.

We are already discussing the next phase with them.

Project summary

We partnered with The Call Stack to run user research and create new designs for our mobile app. The project was split into milestones, with a working build shared at the end of each one. The engagement ran for about 4 months.

Overall Rating 4.0
Quality 3.5
Schedule 4.0
Project Cost 4.0
Willing To Refer 5.0

Project Type:: UI/UX Design
Project Cost:: $10,000 to $49,999
Project Duration:: Dec 2025 - Apr 2026
Business Type:: Agriculture
Location:: Adelaide, Australia

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I'm the Founder at Sage Farms, a Agriculture company based in Adelaide, Australia. I look after our technology and work closely with outside partners on bigger projects.

What specific problem or business challenge led you to hire this company?

We had tried to do this internally and it stalled. We needed specialists to run user research and create new designs for our mobile app.

What services did the company provide for your project?

UI/UX Design, including planning, development, testing and launch support.

Why did you choose this company over other providers you considered?

We compared three or four agencies. The Call Stack asked the best questions and had good reviews from past clients.

How clearly did the company understand your requirements and business goals?

Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.

How was your overall experience with their communication and project management?

Very responsive. We usually heard back the same day, even with the time difference.

Did the company deliver the project on time and within your expected budget?

Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.

What tangible results or business impact have you seen since the project was completed?

We can now handle more volume without adding staff, which was the main goal.

What did you like most about working with this company?

How easy they were to work with. They were responsive, honest and genuinely interested in our success.

Would you recommend this company to others, and would you work with them again?

Definitely. We have already started talking about the next phase.

Capable Quality Assurance & Testing team — happy with the end result

Chloe MacDonald / Chief Digital Officer | Jun 01, 2026

We got a good result in the end, but the road there had a few bumps. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. The developers were knowledgeable and made a few suggestions that ended up saving us time and money. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

The result looks great and performs well, and our internal team found it easy to take over. There were some early misunderstandings on requirements that took a few rounds to sort out. Overall, a team we trust and plan to keep working with.

Project summary

We hired The Call Stack to set up automated testing for our web application. The project was split into milestones, with a working build shared at the end of each one. Overall it was a 9-month engagement.

Overall Rating 3.5
Quality 3.5
Schedule 3.5
Project Cost 4.0
Willing To Refer 5.0

Project Type:: Quality Assurance & Testing
Project Cost:: $50,000 to $149,999
Project Duration:: Aug 2025 - May 2026
Business Type:: Fashion & Apparel
Location:: Calgary, Canada

Questions & Answers

Please describe your company, your role, and the industry you operate in.

I work as Chief Digital Officer at Lakeshore Wear. We operate in Fashion & Apparel and most of our customers are in and around Calgary, Canada.

What specific problem or business challenge led you to hire this company?

We had tried to do this internally and it stalled. We needed specialists to set up automated testing for our web application.

What services did the company provide for your project?

Quality Assurance & Testing, plus QA and some consulting on how to structure the project.