Probably Rational Ltd.

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Details

Founded:
2016
Hourly Rates:
$100 - $149 / hr
Employees:
2 - 9
Ratings:
4.7 8 Reviews

Industries Served

Energy & Utilities Telecommunications Healthcare Manufacturing Real Estate Fashion & Apparel

Where We Specialize

18% ReactJS
ReactJS 18%
Web Development 18%
NFT Token Development 18%
Progressive Web App 16%
Mobile App Development 11%
Bot Development 10%
Data Visualization 4%
Big Data Analytics 3%
Blockchain Development 2%

Industry Expertise

Automotive100%

Typical Project Size

55% Small Business
37% Midmarket Business
8% Enterprise

About

Businesses looking for a reliable technology partner often consider Probably Rational Ltd. The company's main offerings are Mobile App Development. With 2 - 9 people on staff, Probably Rational Ltd. can take on projects of varying size. Typical hourly rates run around $100 - $149 / hr/hr. The team is based in Lincoln, England. These details offer a useful starting point when evaluating Probably Rational Ltd.

Probably Rational Ltd. Reviews

4.7 8 Reviews
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Probably Rational Ltd. Delivered a Quality Blockchain Development Solution on Time

Vikram Verma / Managing Director | Sep 06, 2026

I would rate this engagement highly on almost every front. 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.

We launched on schedule and have not had any major issues since. Overall, a team we trust and plan to keep working with.

Project summary

We partnered with Probably Rational Ltd. to build a supply chain traceability prototype on a permissioned blockchain. They worked alongside our in-house team, which mostly handled business requirements and testing. We worked together for around 8 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Blockchain Development
Project Cost:
$10,000 to $49,999
Project Duration:
Nov 2025 - Jul 2026
Business Type:
Energy & Utilities
Location:
Bengaluru, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Harborview Power is a Energy & Utilities business in Bengaluru, India. As Managing Director, I was responsible for this project on our side and the main contact for Probably Rational Ltd..
What specific problem or business challenge led you to hire this company?
We had tried to do this internally and it stalled. We needed specialists to build a supply chain traceability prototype on a permissioned blockchain.
What services did the company provide for your project?
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?
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?
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.

Good value and a team that genuinely cares about the result

Darragh Walsh / Founder | Sep 05, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. The developers were knowledgeable and made a few suggestions that ended up saving us time and money.

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 partnered with Probably Rational Ltd. to develop a field-staff app with offline mode that syncs back to our main system. The project was split into milestones, with a working build shared at the end of each one. The project took roughly 8 months from kickoff to launch.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 5.0
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Mobile App Development
Project Cost:
Less than $10,000
Project Duration:
Dec 2025 - Aug 2026
Business Type:
Telecommunications
Location:
Cork, Ireland

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Founder at Silverline Telecom, a Telecommunications company based in Cork, Ireland. 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 develop a field-staff app with offline mode that syncs back to our main system, 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?
We compared three or four agencies. Probably Rational Ltd. 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 Telecommunications 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?
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. They are a reliable Mobile App Development partner.

Easy to work with and very transparent on timelines and cost

Nikhil Desai / CEO | Aug 16, 2026

I would rate this engagement highly on almost every front. 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 shared working builds regularly, so we could test early and give feedback before things were locked in.

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

If you need a team that communicates well and delivers, they are a good choice.

Project summary

Our company worked with Probably Rational Ltd. to rebuild our existing mobile app, which had poor reviews and frequent crashes. The project was split into milestones, with a working build shared at the end of each one. The engagement ran for about 3 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:
$150,000 to $499,999
Project Duration:
Apr 2026 - Jul 2026
Business Type:
Healthcare
Location:
Gurugram, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as CEO at Swift Medical Pvt Ltd. We operate in Healthcare and most of our customers are in and around Gurugram, India.
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?
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?
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?
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 Mobile App Development partner.

Great team to work with — professional, responsive and reliable

Lauren Bennett / Director of IT | Jun 30, 2026

Our experience with Probably Rational Ltd. 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

The Mobile App Development work has already made a noticeable difference — tasks that used to take hours now take minutes. I would recommend Probably Rational Ltd. to anyone looking for a dependable Mobile App Development partner.

Project summary

We partnered with Probably Rational Ltd. to develop a field-staff app with offline mode that syncs back to our main system. The project was split into milestones, with a working build shared at the end of each one. We worked together for around 5 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 4.5
  • Project Cost 5.0
  • 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:
Manufacturing
Location:
San Diego, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director of IT at Greenfield Components, a Manufacturing company based in San Diego, 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 develop a field-staff app with offline mode that syncs back to our main system.
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?
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, 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.

Probably Rational Ltd. Delivered a Quality Web Development Solution on Time

Amy Clarke / Project Manager | May 06, 2026

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

The result looks great and performs well, and our internal team found it easy to take over. We are already discussing the next phase with them.

Project summary

We partnered with Probably Rational Ltd. 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. We worked together for around 3 months.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.0
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Web Development
Project Cost:
$50,000 to $149,999
Project Duration:
Dec 2025 - Mar 2026
Business Type:
Telecommunications
Location:
Bristol, UK

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Project Manager at Summit Communications Ltd, a Telecommunications company based in Bristol, 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 had tried to do this internally and it stalled. We needed specialists to build a customer portal where clients can log in, track orders and download invoices.
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?
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?
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, I would recommend them and we plan to work with them again.

Delivered on time and stayed involved after launch

Meera Kulkarni / Co-Founder & CTO | Apr 27, 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. 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. I would recommend Probably Rational Ltd. to anyone looking for a dependable Blockchain Development partner.

Project summary

We partnered with Probably Rational Ltd. to develop and audit smart contracts for a tokenized loyalty program. The project was split into milestones, with a working build shared at the end of each one. 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:
Blockchain Development
Project Cost:
$150,000 to $499,999
Project Duration:
Aug 2025 - Mar 2026
Business Type:
Real Estate
Location:
Kolkata, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Co-Founder & CTO at Lakeshore Homes Pvt Ltd, a Real Estate company based in Kolkata, 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?
Our existing setup was holding us back. We wanted to develop and audit smart contracts for a tokenized loyalty program before our busy season.
What services did the company provide for your project?
Mainly Blockchain Development. They also helped with the technical planning and a few integrations with our existing tools.
Why did you choose this company over other providers you considered?
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?
Very responsive. We usually heard back the same day, even with the time difference.
Did the company deliver the project on time and within your expected budget?
Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.
What tangible results or business impact have you seen since the project was completed?
We can now handle more volume without adding staff, which was the main goal.
What did you like most about working with this company?
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

Ethan Thompson / Director | Feb 18, 2026

Overall the project was a success, though it was not without some challenges. 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. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

It has made a real difference to how our team works day to day. Estimates on a few features were optimistic and those took longer than planned. If you need a team that communicates well and delivers, they are a good choice.

Project summary

We partnered with Probably Rational Ltd. to build a supply chain traceability prototype on a permissioned blockchain. The project was split into milestones, with a working build shared at the end of each one. The engagement ran for about 7 months.

  • Overall Rating 3.5
  • Quality 4.0
  • Schedule 3.5
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Blockchain Development
Project Cost:
$10,000 to $49,999
Project Duration:
May 2025 - Dec 2025
Business Type:
Fashion & Apparel
Location:
Toronto, Canada

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director at Greenfield Wear, a Fashion & Apparel company based in Toronto, Canada. 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 supply chain traceability prototype on a permissioned blockchain so they could focus on customers.
What services did the company provide for your project?
Blockchain Development, including planning, development, testing and launch support.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Probably Rational Ltd. 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, 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?
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 Blockchain Development partner.

They listened, asked the right questions, and delivered

Priya Sullivan / IT Director | Feb 13, 2026

Our experience with Probably Rational Ltd. was really positive from start to finish. 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. 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.

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

We would definitely work with them again.

Project summary

Probably Rational Ltd. was brought in to build a supply chain traceability prototype on a permissioned blockchain. The project was split into milestones, with a working build shared at the end of each one. We worked together for around 4 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Blockchain Development
Project Cost:
$500,000+
Project Duration:
Sep 2025 - Jan 2026
Business Type:
Telecommunications
Location:
Atlanta, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as IT Director at Lakeshore Communications Inc. We operate in Telecommunications and most of our customers are in and around Atlanta, USA.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to build a supply chain traceability prototype on a permissioned blockchain before our busy season.
What services did the company provide for your project?
End-to-end Blockchain 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?
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?
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.
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