Seastack

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Details

Founded:
2010
Hourly Rates:
Undisclosed
Employees:
10 - 49
Ratings:
4.3 9 Reviews

Industries Served

Legal Services Environmental Services Gaming & Gambling Government & Public Sector Mining & Metals Media & Entertainment Financial Services Insurance Fashion & Apparel

Where We Specialize

30% AI Development
AI Development 30%
Bot Development 27%
Mobile App Development 21%
IoT Development 11%
Web Development 7%
Augmented Reality 4%

Industry Expertise

Restaurant55% Food32% Manufacturing13%

Typical Project Size

43% Small Business
42% Enterprise
15% Midmarket Business

About

Seastack is a software development company that turns ideas into working products. Seastack focuses on Custom Software Development and Web Development. Its team includes 10 - 49 specialists working across design, development, and delivery. Overall, Seastack is one of the options worth shortlisting for a technology project.

Seastack Reviews

4.3 9 Reviews
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Great Experience With Seastack on Our Mobile App Development Project

Johan Dlamini / Director of Technology | Sep 08, 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. They shared working builds regularly, so we could test early and give feedback before things were locked in.

We launched on schedule and have not had any major issues since.

We would definitely work with them again.

Project summary

We engaged Seastack 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 7 months.

  • Overall Rating 4.5
  • Quality 4.0
  • Schedule 4.5
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$500,000+
Project Duration:
Jan 2026 - Aug 2026
Business Type:
Legal Services
Location:
Johannesburg, South Africa

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Legal Services company based in Johannesburg, South Africa. I'm the Director of Technology and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to build iOS and Android apps for our customers, including booking, payments and push notifications before our busy season.
What services did the company provide for your project?
Mobile App Development, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Seastack 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 Legal Services 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?
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. They are a reliable Mobile App Development partner.

Good results, communication improved as the project went on

Megan Wallace / Head of Digital Transformation | Aug 26, 2026

We got a good result in the end, but the road there had a few bumps. 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. 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.

It has made a real difference to how our team works day to day. There were some early misunderstandings on requirements that took a few rounds to sort out. Happy to recommend them.

Project summary

We hired Seastack to build a demand forecasting model on top of our sales data. Their team handled planning, development and QA, with our product owner signing off each milestone. The engagement ran for about 2 months.

  • 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 2026 - Jun 2026
Business Type:
Environmental Services
Location:
Nashville, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Head of Digital Transformation at Stonebridge Environmental Inc. We operate in Environmental Services and most of our customers are in and around Nashville, 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 a demand forecasting model on top of our sales data.
What services did the company provide for your project?
End-to-end AI & Machine Learning — from requirements and design through to deployment and a support period afterwards.
Why did you choose this company over other providers you considered?
They had relevant experience in Environmental Services and their proposal was the clearest of the ones we received.
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?
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?
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?
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.

Quality work, a little slower than we planned

Nathan O'Brien / Engineering Manager | Jul 22, 2026

Overall the project was a success, though it was not without some challenges. They were upfront about what was realistic within our budget, which helped us prioritise the right features. 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. Their team changed one developer midway, which slowed things down for a couple of weeks. We would definitely work with them again.

Project summary

Seastack was brought in to rebuild our existing mobile app, which had poor reviews and frequent crashes. The work covered requirements, design, development, testing and launch support. Overall it was a 5-month engagement.

  • Overall Rating 3.5
  • Quality 3.5
  • Schedule 3.5
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$50,000 to $149,999
Project Duration:
Jan 2026 - Jun 2026
Business Type:
Gaming & Gambling
Location:
Brisbane, Australia

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Gaming & Gambling company based in Brisbane, Australia. I'm the Engineering 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 rebuild our existing mobile app, which had poor reviews and frequent crashes, and we didn't have the in-house capacity to do it ourselves.
What services did the company provide for your project?
Mobile App 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?
They understood our goals quickly, partly because they had worked with Gaming & Gambling clients before.
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?
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?
Yes, I would recommend them and we plan to work with them again.

Exceeded our expectations on quality and communication

Nicole Bennett / Head of Product | May 07, 2026

Seastack did an excellent job for us. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. 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 Web Development work has already made a noticeable difference — tasks that used to take hours now take minutes. Overall, a team we trust and plan to keep working with.

Project summary

Seastack was brought in to redesign and rebuild our company website on a modern stack. Their team handled planning, development and QA, with our product owner signing off each milestone. We worked together for around 6 months.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 5.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Web Development
Project Cost:
$150,000 to $499,999
Project Duration:
Sep 2025 - Mar 2026
Business Type:
Government & Public Sector
Location:
Dallas, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Crestview Public Services LLC is a Government & Public Sector business in Dallas, USA. As Head of Product, I was responsible for this project on our side and the main contact for Seastack.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to redesign and rebuild our company website on a modern stack before our busy season.
What services did the company provide for your project?
Web 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 Government & Public Sector and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
They understood our goals quickly, partly because they had worked with Government & Public Sector clients before.
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?
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 would recommend them and we plan to work with them again.

They listened, asked the right questions, and delivered

Lukas Müller / CEO | May 02, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. 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. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later.

We launched on schedule and have not had any major issues since.

I would recommend Seastack to anyone looking for a dependable IoT Development partner.

Project summary

We partnered with Seastack to build firmware and a companion app for a smart device we were launching. Their team handled planning, development and QA, with our product owner signing off each milestone. Overall it was a 6-month engagement.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
IoT Development
Project Cost:
$10,000 to $49,999
Project Duration:
Sep 2025 - Mar 2026
Business Type:
Mining & Metals
Location:
Cologne, Germany

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Summit Mining GmbH is a Mining & Metals business in Cologne, Germany. As CEO, I was responsible for this project on our side and the main contact for Seastack.
What specific problem or business challenge led you to hire this company?
We needed to build firmware and a companion app for a smart device we were launching, and we didn't have the in-house capacity to do it ourselves.
What services did the company provide for your project?
IoT 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 Mining & Metals 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?
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?
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 IoT Development partner.

Great team to work with — professional, responsive and reliable

Pooja Verma / Head of Digital | Mar 29, 2026

We were happy with the final result. 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. Their project manager kept things organised and was quick to flag anything that might affect the timeline.

Feedback from our customers has been very positive so far. There were some early misunderstandings on requirements that took a few rounds to sort out. We are already discussing the next phase with them.

Project summary

Seastack was brought in to connect our equipment to a cloud dashboard so we could monitor it remotely. The project was split into milestones, with a working build shared at the end of each one. The engagement ran for about 8 months.

  • Overall Rating 4.0
  • Quality 3.5
  • Schedule 4.5
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
IoT Development
Project Cost:
$150,000 to $499,999
Project Duration:
Jun 2025 - Feb 2026
Business Type:
Media & Entertainment
Location:
Mumbai, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Head of Digital at Kinetic Pictures Pvt Ltd, a Media & Entertainment company based in Mumbai, 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 had tried to do this internally and it stalled. We needed specialists to connect our equipment to a cloud dashboard so we could monitor it remotely.
What services did the company provide for your project?
IoT Development, including planning, development, testing and launch support.
Why did you choose this company over other providers you considered?
They had relevant experience in Media & Entertainment and their proposal was the clearest of the ones we received.
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?
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?
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?
Yes, I've already recommended them to a couple of people I know.

Strong Technical Skills and a Very Responsive Mobile App Development Team

Jonas Fischer / Managing Director | Feb 17, 2026

Seastack 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. The developers were knowledgeable and made a few suggestions that ended up saving us time and money. They shared working builds regularly, so we could test early and give feedback before things were locked in.

It has made a real difference to how our team works day to day. If you need a team that communicates well and delivers, they are a good choice.

Project summary

Seastack was brought in to develop a field-staff app with offline mode that syncs back to our main system. The work covered requirements, design, development, testing and launch support. The project took roughly 9 months from kickoff to launch.

  • Overall Rating 4.5
  • Quality 5.0
  • Schedule 4.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$10,000 to $49,999
Project Duration:
Apr 2025 - Jan 2026
Business Type:
Financial Services
Location:
Hamburg, Germany

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Vertex Capital GmbH is a Financial Services business in Hamburg, Germany. As Managing Director, I was responsible for this project on our side and the main contact for Seastack.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to develop a field-staff app with offline mode that syncs back to our main system before our busy season.
What services did the company provide for your project?
Mainly Mobile App 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 Financial Services and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
They understood our goals quickly, partly because they had worked with Financial Services 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?
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?
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?
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?
Definitely. We have already started talking about the next phase.

Great Experience With Seastack on Our AI & Machine Learning Project

Harry Doyle / Director of IT | Feb 08, 2026

I would rate this engagement highly on almost every front. We dealt with the same core team throughout, so we did not have to keep re-explaining things. 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.

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

Seastack was brought in to build a demand forecasting model on top of our sales data. They also took care of integrations with a couple of third-party tools we already used. The engagement ran for about 6 months.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
AI & Machine Learning
Project Cost:
$150,000 to $499,999
Project Duration:
Jul 2025 - Jan 2026
Business Type:
Insurance
Location:
Bristol, UK

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Cobalt Cover Ltd is a Insurance business in Bristol, UK. As Director of IT, I was responsible for this project on our side and the main contact for Seastack.
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 demand forecasting model on top of our sales data.
What services did the company provide for your project?
AI & Machine Learning, including planning, development, testing and launch support.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Seastack 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?
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?
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.

Professional Mobile App Development Team, Smooth Delivery From Start to Finish

Kelly Brooks / Marketing Director | Feb 03, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. 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. 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. We are already discussing the next phase with them.

Project summary

We hired Seastack to build iOS and Android apps for our customers, including booking, payments and push notifications. They also took care of integrations with a couple of third-party tools we already used. We worked together for around 4 months.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$50,000 to $149,999
Project Duration:
Aug 2025 - Dec 2025
Business Type:
Fashion & Apparel
Location:
Denver, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Marketing Director at Evergreen Clothing Inc. We operate in Fashion & Apparel and most of our customers are in and around Denver, USA.
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?
Mobile App 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?
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?
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 Mobile App Development partner.
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