21infinity

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Details

Founded:
2003
Hourly Rates:
$50 - $99 / hr
Employees:
10 - 49
Ratings:
4.4 9 Reviews

Industries Served

Advertising & Marketing Real Estate Healthcare Media & Entertainment Logistics & Supply Chain Information Technology Events & Event Management

Where We Specialize

23% Bot Development
Bot Development 23%
Blockchain Development 23%
Mobile App Development 19%
Software Development 12%
AI Development 12%
Virtual Reality 11%

Industry Expertise

FinTech100%

Typical Project Size

39% Small Business
31% Midmarket Business
30% Enterprise

About

Businesses looking for a reliable technology partner often consider 21infinity. The company's main offerings are Web Development and Mobile App Development. 21infinity employs 10 - 49 people. Projects are generally billed around $50 - $99 / hr/hr. The team is based in Opole, Poland. These details offer a useful starting point when evaluating 21infinity.

21infinity Reviews

4.4 9 Reviews
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Capable Mobile App Development team — happy with the end result

Omar Khan / Director | Sep 15, 2026

Overall the project was a success, though it was not without some challenges. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building.

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. I would recommend 21infinity to anyone looking for a dependable Mobile App Development partner.

Project summary

Our company worked with 21infinity to build iOS and Android apps for our customers, including booking, payments and push notifications. Their team handled planning, development and QA, with our product owner signing off each milestone. The engagement ran for about 6 months.

  • Overall Rating 3.5
  • Quality 3.5
  • Schedule 3.5
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$10,000 to $49,999
Project Duration:
Jan 2026 - Jul 2026
Business Type:
Advertising & Marketing
Location:
Dubai, UAE

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director at Cobalt Marketing FZ-LLC, a Advertising & Marketing company based in Dubai, UAE. 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 iOS and Android apps for our customers, including booking, payments and push notifications, 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, 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 Advertising & Marketing 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?
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 would recommend them and we plan to work with them again.

Reliable Mobile App Development Partner That Delivered What They Promised

Rohan Verma / Head of Engineering | Sep 09, 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. The developers were knowledgeable and made a few suggestions that ended up saving us time and money.

Feedback from our customers has been very positive so far. We are already discussing the next phase with them.

Project summary

21infinity 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 engagement ran for about 4 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$50,000 to $149,999
Project Duration:
Apr 2026 - Aug 2026
Business Type:
Real Estate
Location:
Kolkata, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Real Estate company based in Kolkata, India. I'm the Head of Engineering 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 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?
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?
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?
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?
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.

Strong Technical Skills and a Very Responsive Mobile App Development Team

Lauren Johnson / Director | Jul 31, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. We dealt with the same core team throughout, so we did not have to keep re-explaining things. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

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

Project summary

21infinity was brought in to build iOS and Android apps for our customers, including booking, payments and push notifications. Their team handled planning, development and QA, with our product owner signing off each milestone. Overall it was a 7-month engagement.

  • 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:
$10,000 to $49,999
Project Duration:
Oct 2025 - May 2026
Business Type:
Healthcare
Location:
Seattle, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Healthcare company based in Seattle, USA. I'm the Director 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 iOS and Android apps for our customers, including booking, payments and push notifications, and we didn't have the in-house capacity to do it ourselves.
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?
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?
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?
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.

Solid Mobile App Development Work With Clear Communication Throughout

Jessica Price / IT Manager | May 18, 2026

The project went well overall. 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.

Feedback from our customers has been very positive so far. Estimates on a few features were optimistic and those took longer than planned.

We would definitely work with them again.

Project summary

We engaged 21infinity to rebuild our existing mobile app, which had poor reviews and frequent crashes. They worked alongside our in-house team, which mostly handled business requirements and testing. We worked together for around 7 months.

  • Overall Rating 4.0
  • Quality 4.5
  • Schedule 3.5
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$150,000 to $499,999
Project Duration:
Sep 2025 - Apr 2026
Business Type:
Media & Entertainment
Location:
Seattle, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Westbridge Entertainment LLC is a Media & Entertainment business in Seattle, USA. As IT Manager, I was responsible for this project on our side and the main contact for 21infinity.
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?
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?
We compared three or four agencies. 21infinity asked the best questions and had good reviews from past clients.
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. 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 would recommend them and we plan to work with them again.

21infinity Delivered a Quality Mobile App Development Solution on Time

Amy Clarke / Director of IT | May 08, 2026

Our experience with 21infinity was really positive from start to finish. They were upfront about what was realistic within our budget, which helped us prioritise the right features. 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. Overall, a team we trust and plan to keep working with.

Project summary

We hired 21infinity to build iOS and Android apps for our customers, including booking, payments and push notifications. Their team handled planning, development and QA, with our product owner signing off each milestone. We worked together for around 7 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$500,000+
Project Duration:
Aug 2025 - Mar 2026
Business Type:
Logistics & Supply Chain
Location:
Reading, UK

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director of IT at Swift Transport Ltd, a Logistics & Supply Chain company based in Reading, 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?
We needed to build iOS and Android apps for our customers, including booking, payments and push notifications, 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?
We compared three or four agencies. 21infinity 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?
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?
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.

Skilled Mobile App Development Team That Understood Our Business

Ryan Patel / CTO | Apr 21, 2026

21infinity 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. The developers were knowledgeable and made a few suggestions that ended up saving us time and money. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

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

We partnered with 21infinity to develop a field-staff app with offline mode that syncs back to our main system. They also took care of integrations with a couple of third-party tools we already used. Overall it was a 3-month engagement.

  • Overall Rating 5.0
  • Quality 4.5
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$50,000 to $149,999
Project Duration:
Dec 2025 - Mar 2026
Business Type:
Real Estate
Location:
Seattle, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the CTO at Beacon Homes, a Real Estate company based in Seattle, 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 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?
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?
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 Real Estate 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?
Definitely. We have already started talking about the next phase.

Reliable Software Development Partner That Delivered What They Promised

Fatima Al Mansoori / Founder | Jan 18, 2026

I would rate this engagement highly on almost every front. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. 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.

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

Our company worked with 21infinity to build a custom operations platform to replace the spreadsheets and email threads we were running the business on. They worked alongside our in-house team, which mostly handled business requirements and testing. We worked together for around 7 months.

  • Overall Rating 5.0
  • Quality 4.5
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Software Development
Project Cost:
$10,000 to $49,999
Project Duration:
May 2025 - Dec 2025
Business Type:
Information Technology
Location:
Sharjah, UAE

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Founder at Ironwood Digital LLC. We operate in Information Technology and most of our customers are in and around Sharjah, UAE.
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.
What services did the company provide for your project?
End-to-end Software 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 Information Technology 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?
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.

Would happily work with them again

Kelly Graham / Co-Founder | Jan 06, 2026

21infinity 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

We are already seeing better numbers than before the project. 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 hired 21infinity to develop a field-staff app with offline mode that syncs back to our main system. They worked alongside our in-house team, which mostly handled business requirements and testing. The project took roughly 9 months from kickoff to launch.

  • Overall Rating 4.0
  • Quality 4.0
  • Schedule 3.5
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
Less than $10,000
Project Duration:
Mar 2025 - Dec 2025
Business Type:
Logistics & Supply Chain
Location:
Atlanta, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Logistics & Supply Chain company based in Atlanta, USA. I'm the Co-Founder 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 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?
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 Logistics & Supply Chain 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?
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?
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.

Good work overall, with a few bumps along the way

Maria Ramirez / VP of Engineering | Jan 02, 2026

Overall the project was a success, though it was not without some challenges. Their project manager kept things organised and was quick to flag anything that might affect the timeline. The developers were knowledgeable and made a few suggestions that ended up saving us time and money.

We launched on schedule and have not had any major issues since. There were some early misunderstandings on requirements that took a few rounds to sort out. We would definitely work with them again.

Project summary

We partnered with 21infinity 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 9-month engagement.

  • Overall Rating 3.5
  • Quality 3.5
  • Schedule 4.0
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
$50,000 to $149,999
Project Duration:
Mar 2025 - Dec 2025
Business Type:
Events & Event Management
Location:
Raleigh, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as VP of Engineering at Oakline Events LLC. We operate in Events & Event Management and most of our customers are in and around Raleigh, 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 rebuild our existing mobile app, which had poor reviews and frequent crashes so they could focus on customers.
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?
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?
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?
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.
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