Diagonal.Software GmbH

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Details

Founded:: 2024
Hourly Rates:: Undisclosed
Employees:: 2 - 9
Ratings:: 4.2 8 Reviews

Industries Served

Agriculture Energy & Utilities Events & Event Management Manufacturing Real Estate Nonprofit & NGO Advertising & Marketing Retail & E-commerce

Where We Specialize

20% E-commerce Development

E-commerce Development 20%

Mobile App Development 15%

Machine Learning 15%

Bot Development 13%

IoT Development 13%

Web Development 10%

Virtual Reality 10%

AI Development 4%

Industry Expertise

Entertainment54% Restaurant33% Retail13%

Typical Project Size

59% Enterprise

33% Midmarket Business

8% Small Business

About

Diagonal.Software GmbH works with clients to plan, build, and ship digital products. The company's main offerings are AI & Machine Learning. Diagonal.Software GmbH employs 2 - 9 people. Their home base is Aschaffenburg, Germany. This profile is a starting point — reach out to Diagonal.Software GmbH directly to discuss project specifics.

Diagonal.Software GmbH Reviews

4.2 8 Reviews

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Professional team that made a complex project feel manageable

Faisal Al Harbi / Co-Founder | Oct 02, 2026

The project went well overall. 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. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building.

Since launch, everything has been stable and our team has adapted to it quickly. 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

We hired Diagonal.Software GmbH to rebuild our existing mobile app, which had poor reviews and frequent crashes. Scope included discovery workshops, development in two-week sprints and a short support period after launch. The project took roughly 9 months from kickoff to launch.

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

Project Type:: Mobile App Development
Project Cost:: Less than $10,000
Project Duration:: Dec 2025 - Sep 2026
Business Type:: Agriculture
Location:: Jeddah, Saudi Arabia

Questions & Answers

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

I'm the Co-Founder at Pioneer Growers, a Agriculture company based in Jeddah, Saudi Arabia. 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 rebuild our existing mobile app, which had poor reviews and frequent crashes before our busy season.

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. Diagonal.Software GmbH 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, 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?

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 AI & Machine Learning Team, Smooth Delivery From Start to Finish

Brandon Nguyen / Managing Director | Sep 02, 2026

I would rate this engagement highly on almost every front. Their project manager kept things organised and was quick to flag anything that might affect the timeline. 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.

Overall, a team we trust and plan to keep working with.

Project summary

Our company worked with Diagonal.Software GmbH to add an AI chatbot to our support site that answers questions from our help docs. They worked alongside our in-house team, which mostly handled business requirements and testing. Overall it was a 7-month engagement.

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

Project Type:: AI & Machine Learning
Project Cost:: $10,000 to $49,999
Project Duration:: Dec 2025 - Jul 2026
Business Type:: Energy & Utilities
Location:: Atlanta, USA

Questions & Answers

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

I'm the Managing Director at Crestview Utilities, a Energy & Utilities company based in Atlanta, 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?

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?

We compared three or four agencies. Diagonal.Software GmbH 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 Energy & Utilities 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?

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?

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.

Strong Technical Skills and a Very Responsive Web Development Team

Eric Morgan / CTO | Jun 11, 2026

Our experience with Diagonal.Software GmbH was really positive from start to finish. They were upfront about what was realistic within our budget, which helped us prioritise the right features. 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.

Since launch, everything has been stable and our team has adapted to it quickly. Overall, a team we trust and plan to keep working with.

Project summary

We engaged Diagonal.Software GmbH to redesign and rebuild our company website on a modern stack. They also took care of integrations with a couple of third-party tools we already used. The project took roughly 3 months from kickoff to launch.

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

Project Type:: Web Development
Project Cost:: $50,000 to $149,999
Project Duration:: Feb 2026 - May 2026
Business Type:: Events & Event Management
Location:: Charlotte, USA

Questions & Answers

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

I work as CTO at Greenfield Productions Inc. We operate in Events & Event Management and most of our customers are in and around Charlotte, 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 redesign and rebuild our company website on a modern stack.

What services did the company provide for your project?

End-to-end Web 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?

They understood our goals quickly, partly because they had worked with Events & Event Management 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?

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?

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

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?

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

Solid delivery, though timelines needed some pushing

Johan Nkosi / Founder & CEO | May 11, 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

We launched on schedule and have not had any major issues since. We had to follow up a few times on smaller bug fixes after launch.

Overall, a team we trust and plan to keep working with.

Project summary

Our company worked with Diagonal.Software GmbH to automate document data extraction that our team was doing by hand. Scope included discovery workshops, development in two-week sprints and a short support period after launch. The engagement ran for about 5 months.

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

Project Type:: AI & Machine Learning
Project Cost:: $10,000 to $49,999
Project Duration:: Oct 2025 - Mar 2026
Business Type:: Manufacturing
Location:: Cape Town, South Africa

Questions & Answers

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

I'm the Founder & CEO at Harborview Fabrication (Pty) Ltd, a Manufacturing company based in Cape Town, South Africa. 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 automate document data extraction that our team was doing by hand before our busy season.

What services did the company provide for your project?

Mainly AI & Machine Learning. 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 Manufacturing 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?

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?

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?

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

Reliable Web Development Partner That Delivered What They Promised

Amit Mehta / Director | Feb 28, 2026

Our experience with Diagonal.Software GmbH was really positive from start to finish. They shared working builds regularly, so we could test early and give feedback before things were locked in. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. Their project manager kept things organised and was quick to flag anything that might affect the timeline.

We are already seeing better numbers than before the project. We would definitely work with them again.

Project summary

We partnered with Diagonal.Software GmbH to build a customer portal where clients can log in, track orders and download invoices. Scope included discovery workshops, development in two-week sprints and a short support period after launch. The engagement ran for about 2 months.

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

Project Type:: Web Development
Project Cost:: $10,000 to $49,999
Project Duration:: Dec 2025 - Feb 2026
Business Type:: Real Estate
Location:: Kolkata, India

Questions & Answers

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

Bluepeak Estates is a Real Estate business in Kolkata, India. As Director, I was responsible for this project on our side and the main contact for Diagonal.Software GmbH.

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

Our existing setup was holding us back. We wanted to build a customer portal where clients can log in, track orders and download invoices before our busy season.

What services did the company provide for your project?

End-to-end Web Development — 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 Real Estate 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 Real Estate 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. 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?

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

Quality work, a little slower than we planned

Naledi van der Merwe / Owner | Feb 16, 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. Even with the time zone difference, responses usually came the same day and we never felt left in the dark.

Feedback from our customers has been very positive so far. We had to follow up a few times on smaller bug fixes after launch.

We are already discussing the next phase with them.

Project summary

We engaged Diagonal.Software GmbH to rebuild a slow, outdated web app and move it to a new framework. The work covered requirements, design, development, testing and launch support. The engagement ran for about 7 months.

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

Project Type:: Web Development
Project Cost:: $50,000 to $149,999
Project Duration:: May 2025 - Dec 2025
Business Type:: Nonprofit & NGO
Location:: Johannesburg, South Africa

Questions & Answers

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

Stonebridge Alliance (Pty) Ltd is a Nonprofit & NGO business in Johannesburg, South Africa. As Owner, I was responsible for this project on our side and the main contact for Diagonal.Software GmbH.

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 rebuild a slow, outdated web app and move it to a new framework.

What services did the company provide for your project?

Web 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?

They understood our goals quickly, partly because they had worked with Nonprofit & NGO 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, 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?

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.

Great Experience With Diagonal.Software GmbH on Our IoT Development Project

Meera Reddy / Owner | Feb 13, 2026

Diagonal.Software GmbH did good work for us, and we would use them again. The developers were knowledgeable and made a few suggestions that ended up saving us time and money. 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 had to follow up a few times on smaller bug fixes after launch. I would recommend Diagonal.Software GmbH to anyone looking for a dependable IoT Development partner.

Project summary

We engaged Diagonal.Software GmbH to build firmware and a companion app for a smart device we were launching. Scope included discovery workshops, development in two-week sprints and a short support period after launch. Overall it was a 4-month engagement.

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

Project Type:: IoT Development
Project Cost:: Less than $10,000
Project Duration:: Sep 2025 - Jan 2026
Business Type:: Advertising & Marketing
Location:: Pune, India

Questions & Answers

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

Sage Media Group is a Advertising & Marketing business in Pune, India. As Owner, I was responsible for this project on our side and the main contact for Diagonal.Software GmbH.

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 firmware and a companion app for a smart device we were launching.

What services did the company provide for your project?

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