Custom Stacks Reviews

Exceeded our expectations on quality and communication

Kelly Miller / Co-Founder | Oct 20, 2026

Custom Stacks did good work for us, and we would use them again. They were upfront about what was realistic within our budget, which helped us prioritise the right features. They shared working builds regularly, so we could test early and give feedback before things were locked in. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

The result looks great and performs well, and our internal team found it easy to take over. We had to follow up a few times on smaller bug fixes after launch.

We would definitely work with them again.

Project summary

We engaged Custom Stacks to rebuild an internal order management system that had outgrown its original design. The project was split into milestones, with a working build shared at the end of each one. The project took roughly 5 months from kickoff to launch.

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

Project Type:: Software Development
Project Cost:: Less than $10,000
Project Duration:: Apr 2026 - Sep 2026
Business Type:: Retail & E-commerce
Location:: Denver, USA

Questions & Answers

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

Vertex Retail is a Retail & E-commerce business in Denver, USA. As Co-Founder, I was responsible for this project on our side and the main contact for Custom Stacks.

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

Our team was spending too much time on manual work. The goal was to rebuild an internal order management system that had outgrown its original design so they could focus on customers.

What services did the company provide for your project?

Software Development, plus QA and some consulting on how to structure the project.

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

A colleague recommended them, and our first calls confirmed they understood what we needed.

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?

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?

Yes, on time and within budget.

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.

Good value and a team that genuinely cares about the result

Sam Wright / CTO | Sep 28, 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. 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. If you need a team that communicates well and delivers, they are a good choice.

Project summary

Custom Stacks was brought in to move our application to Azure and set up proper backups and monitoring. 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 4.5
Quality 4.5
Schedule 4.0
Project Cost 4.5
Willing To Refer 5.0

Project Type:: Cloud Services
Project Cost:: $50,000 to $149,999
Project Duration:: Dec 2025 - Jul 2026
Business Type:: Human Resources
Location:: Cambridge, UK

Questions & Answers

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

I'm the CTO at Summit HR Ltd, a Human Resources company based in Cambridge, UK. 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?

Our existing setup was holding us back. We wanted to move our application to Azure and set up proper backups and monitoring before our busy season.

What services did the company provide for your project?

Mainly Cloud Services. 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. Custom Stacks 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?

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?

Their attention to detail and the quality of the final product.

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

Yes. They are a reliable Cloud Services partner.

They listened, asked the right questions, and delivered

Daan de Vries / IT Director | Jun 13, 2026

Custom Stacks did an excellent job for us. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. 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.

Since launch, everything has been stable and our team has adapted to it quickly. We are already discussing the next phase with them.

Project summary

Custom Stacks was brought in to develop and audit smart contracts for a tokenized loyalty program. 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 4.5
Quality 4.5
Schedule 4.5
Project Cost 4.0
Willing To Refer 5.0

Project Type:: Blockchain Development
Project Cost:: $500,000+
Project Duration:: Mar 2026 - May 2026
Business Type:: Travel & Hospitality
Location:: Rotterdam, Netherlands

Questions & Answers

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

We're a mid-sized Travel & Hospitality company based in Rotterdam, Netherlands. I'm the IT Director and I oversaw the project from start to finish.

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 develop and audit smart contracts for a tokenized loyalty program.

What services did the company provide for your project?

Blockchain Development, plus QA and some consulting on how to structure the project.

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

A colleague recommended them, and our first calls confirmed they understood what we needed.

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?

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?

Our team saves several hours a week, and we have had very few issues since launch.

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.

Professional team that made a complex project feel manageable

Luke Stewart / Founder & CEO | Jun 03, 2026

I would rate this engagement highly on almost every front. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. We dealt with the same core team throughout, so we did not have to keep re-explaining things. Their project manager kept things organised and was quick to flag anything that might affect the timeline.

The Mobile App Development work has already made a noticeable difference — tasks that used to take hours now take minutes.

I would recommend Custom Stacks to anyone looking for a dependable Mobile App Development partner.

Project summary

We hired Custom Stacks to build iOS and Android apps for our customers, including booking, payments and push notifications. They worked alongside our in-house team, which mostly handled business requirements and testing. The project took roughly 5 months from kickoff to launch.

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

Project Type:: Mobile App Development
Project Cost:: Less than $10,000
Project Duration:: Dec 2025 - May 2026
Business Type:: Insurance
Location:: Perth, Australia

Questions & Answers

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

We're a mid-sized Insurance company based in Perth, Australia. I'm the Founder & CEO and I oversaw the project from start to finish.

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

Our team was spending too much time on manual work. The goal was to build iOS and Android apps for our customers, including booking, payments and push notifications so they could focus on customers.

What services did the company provide for your project?

End-to-end Mobile App Development — from requirements and design through to deployment and a support period afterwards.

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

A colleague recommended them, and our first calls confirmed they understood what we needed.

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

Better than we expected. They pointed out a few things we had not thought about.

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?

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?

Our team saves several hours a week, and we have had very few issues since launch.

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, I would recommend them and we plan to work with them again.

Delivered on time and stayed involved after launch

Hui Min Ng / Owner | May 29, 2026

Overall we had a good experience working with Custom Stacks. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. 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.

We launched on schedule and have not had any major issues since. Documentation at handover was a bit thin and we had to ask for more detail. We are already discussing the next phase with them.

Project summary

Custom Stacks was brought in to develop a scheduling and dispatch tool for our field team. The work covered requirements, design, development, testing and launch support. We worked together for around 9 months.

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

Project Type:: Software Development
Project Cost:: $10,000 to $49,999
Project Duration:: Jul 2025 - Apr 2026
Business Type:: Travel & Hospitality
Location:: Singapore

Questions & Answers

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

I work as Owner at Cobalt Travel Pte Ltd. We operate in Travel & Hospitality and most of our customers are in and around Singapore.

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

Our existing setup was holding us back. We wanted to develop a scheduling and dispatch tool for our field team before our busy season.

What services did the company provide for your project?

Software Development, plus QA and some consulting on how to structure the project.

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

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

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?

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?

Their attention to detail and the quality of the final product.

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

Layla Haddad / Product Manager | May 18, 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

The result looks great and performs well, and our internal team found it easy to take over. Overall, a team we trust and plan to keep working with.

Project summary

We engaged Custom Stacks 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 engagement ran for about 4 months.

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

Project Type:: Blockchain Development
Project Cost:: $50,000 to $149,999
Project Duration:: Nov 2025 - Mar 2026
Business Type:: Environmental Services
Location:: Sharjah, UAE

Questions & Answers

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

We're a mid-sized Environmental Services company based in Sharjah, UAE. I'm the Product Manager and I oversaw the project from start to finish.

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, plus QA and some consulting on how to structure the project.

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?

Better than we expected. They pointed out a few things we had not thought about.

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, on time and within budget.

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

Customer feedback has been positive, and we have seen better engagement since going live.

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

Good work overall, with a few bumps along the way

Huda Al Qahtani / Co-Founder & CTO | Jan 27, 2026

We got a good result in the end, but the road there had a few bumps. We dealt with the same core team throughout, so we did not have to keep re-explaining things. Even with the time zone difference, responses usually came the same day and we never felt left in the dark.

It has made a real difference to how our team works day to day. Documentation at handover was a bit thin and we had to ask for more detail. Overall, a team we trust and plan to keep working with.

Project summary

We hired Custom Stacks to migrate our on-premise servers to AWS. They also took care of integrations with a couple of third-party tools we already used. We worked together for around 6 months.

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

Project Type:: Cloud Services
Project Cost:: $10,000 to $49,999
Project Duration:: Jun 2025 - Dec 2025
Business Type:: Agriculture
Location:: Riyadh, Saudi Arabia

Questions & Answers

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

Pinecrest Growers Co is a Agriculture business in Riyadh, Saudi Arabia. As Co-Founder & CTO, I was responsible for this project on our side and the main contact for Custom Stacks.

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

We needed to migrate our on-premise servers to AWS, and we didn't have the in-house capacity to do it ourselves.

What services did the company provide for your project?

Cloud Services, 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?

They understood our goals quickly, partly because they had worked with Agriculture 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?

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?

Customer feedback has been positive, and we have seen better engagement since going live.

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

Honest advice and solid execution

Ryan Graham / Owner | Jan 21, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. They shared working builds regularly, so we could test early and give feedback before things were locked in. Their project manager kept things organised and was quick to flag anything that might affect the timeline. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

It has made a real difference to how our team works day to day. I would recommend Custom Stacks to anyone looking for a dependable Data & Analytics partner.

Project summary

We partnered with Custom Stacks to clean up and consolidate customer data spread across several systems. The work covered requirements, design, development, testing and launch support. The project took roughly 3 months from kickoff to launch.

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

Project Type:: Data & Analytics
Project Cost:: $50,000 to $149,999
Project Duration:: Aug 2025 - Nov 2025
Business Type:: Legal Services
Location:: Atlanta, USA

Questions & Answers

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

We're a mid-sized Legal Services company based in Atlanta, USA. I'm the Owner and I oversaw the project from start to finish.

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

Our team was spending too much time on manual work. The goal was to clean up and consolidate customer data spread across several systems so they could focus on customers.

What services did the company provide for your project?

Data & Analytics, plus QA and some consulting on how to structure the project.

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

A colleague recommended them, and our first calls confirmed they understood what we needed.

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. 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.

Solid delivery, though timelines needed some pushing

Stephanie Henderson / VP of Engineering | Jan 16, 2026

The final product works well for us, although the process could have been smoother. Their project manager kept things organised and was quick to flag anything that might affect the timeline. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. 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.

We are already seeing better numbers than before the project. Documentation at handover was a bit thin and we had to ask for more detail.

We are already discussing the next phase with them.

Project summary

Our company worked with Custom Stacks to add an AI chatbot to our support site that answers questions from our help docs. Their team handled planning, development and QA, with our product owner signing off each milestone. Overall it was a 7-month engagement.

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

Project Type:: AI & Machine Learning
Project Cost:: $500,000+
Project Duration:: Apr 2025 - Nov 2025
Business Type:: Fashion & Apparel
Location:: Denver, USA

Questions & Answers

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

I'm the VP of Engineering at Copper Leaf Apparel, a Fashion & Apparel company based in Denver, 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 had tried to do this internally and it stalled. We needed specialists to add an AI chatbot to our support site that answers questions from our help docs.

What services did the company provide for your project?

AI & Machine Learning, plus QA and some consulting on how to structure the project.

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?

They understood our goals quickly, partly because they had worked with Fashion & Apparel clients before.

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?

Our team saves several hours a week, and we have had very few issues since launch.

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.

A reliable long-term partner for our tech needs

Jason Hayes / Founder | Jan 14, 2026

Custom Stacks 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. 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.

Feedback from our customers has been very positive so far.

Happy to recommend them.

Project summary

We partnered with Custom Stacks to build a custom operations platform to replace the spreadsheets and email threads we were running the business on. The work covered requirements, design, development, testing and launch support. The engagement ran for about 9 months.

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

Project Type:: Software Development
Project Cost:: Less than $10,000
Project Duration:: Mar 2025 - Dec 2025
Business Type:: Legal Services
Location:: Nashville, USA

Questions & Answers

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

I'm the Founder at Riverbend Legal, a Legal Services company based in Nashville, 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?

Our team was spending too much time on manual work. The goal was to build a custom operations platform to replace the spreadsheets and email threads we were running the business on so they could focus on customers.