Underline Labs

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Details

Founded:
2015
Hourly Rates:
$100 - $149 / hr
Employees:
2 - 9
Ratings:
4.3 10 Reviews

Industries Served

Information Technology Education Mining & Metals Healthcare Legal Services Human Resources Energy & Utilities Telecommunications

Where We Specialize

15% Mobile App Development
Mobile App Development 15%
IoT Development 15%
Virtual Reality 15%
Testing Services 14%
AI Development 14%
Bot Development 13%
Blockchain Development 10%
Web Development 4%

Industry Expertise

Insurance56% Retail27% FinTech17%

Typical Project Size

80% Midmarket Business
12% Enterprise
8% Small Business

About

Since 2015, Underline Labs has operated as a technology services provider. Underline Labs focuses on E-commerce Development and Web Development for clients in industries such as Retail & E-commerce. Its team includes 2 - 9 specialists working across design, development, and delivery. Projects are generally billed around $100 - $149 / hr/hr. Their home base is Brooklyn, NY. This gives a quick snapshot of what to expect when working with Underline Labs.

Underline Labs Reviews

4.3 10 Reviews
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Professional Quality Assurance & Testing Team, Smooth Delivery From Start to Finish

Sean Walsh / VP of Engineering | Sep 20, 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. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

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

Underline Labs was brought in to run performance and load testing ahead of a big launch. Their team handled planning, development and QA, with our product owner signing off each milestone. The project took roughly 8 months from kickoff to launch.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Quality Assurance & Testing
Project Cost:
$500,000+
Project Duration:
Dec 2025 - Aug 2026
Business Type:
Information Technology
Location:
Dublin, Ireland

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as VP of Engineering at Ironwood Labs. We operate in Information Technology and most of our customers are in and around Dublin, Ireland.
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 run performance and load testing ahead of a big launch.
What services did the company provide for your project?
Quality Assurance & Testing, 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?
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, 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.

Easy to work with and very transparent on timelines and cost

Heather Hughes / Founder & CEO | Sep 14, 2026

Our experience with Underline Labs 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 AI & Machine Learning 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

We partnered with Underline Labs to automate document data extraction that our team was doing by hand. They also took care of integrations with a couple of third-party tools we already used. We worked together for around 2 months.

  • 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:
Jun 2026 - Aug 2026
Business Type:
Education
Location:
Columbus, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Founder & CEO at Swift Learning LLC. We operate in Education and most of our customers are in and around Columbus, 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 automate document data extraction that our team was doing by hand.
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?
We compared three or four agencies. Underline Labs 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 Education 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?
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.

They listened, asked the right questions, and delivered

Ryan Sullivan / Head of Product | Aug 05, 2026

Our experience with Underline Labs 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 Blockchain Development work has already made a noticeable difference — tasks that used to take hours now take minutes. If you need a team that communicates well and delivers, they are a good choice.

Project summary

We engaged Underline Labs to build a supply chain traceability prototype on a permissioned blockchain. The work covered requirements, design, development, testing and launch support. The engagement ran for about 7 months.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Blockchain Development
Project Cost:
$150,000 to $499,999
Project Duration:
Dec 2025 - Jul 2026
Business Type:
Mining & Metals
Location:
Seattle, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Mining & Metals company based in Seattle, USA. I'm the Head of Product 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 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?
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?
Organised and transparent. Their project manager kept the project on track and flagged risks early.
Did the company deliver the project on time and within your expected budget?
Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.
What tangible results or business impact have you seen since the project was completed?
Customer feedback has been positive, and we have seen better engagement since going live.
What did you like most about working with this company?
The consistency. Same team, same standard, from the first week to the last.
Would you recommend this company to others, and would you work with them again?
Yes, I've already recommended them to a couple of people I know.

Exceeded our expectations on quality and communication

Lukas Koch / Owner | Jul 03, 2026

Underline Labs did good work for us, and we would use them again. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

The result looks great and performs well, and our internal team found it easy to take over. Estimates on a few features were optimistic and those took longer than planned.

We are already discussing the next phase with them.

Project summary

Underline Labs was brought in to rebuild a slow, outdated web app and move it to a new framework. The work covered requirements, design, development, testing and launch support. Overall it was a 7-month engagement.

  • Overall Rating 4.0
  • Quality 4.0
  • Schedule 3.5
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
Web Development
Project Cost:
Less than $10,000
Project Duration:
Sep 2025 - Apr 2026
Business Type:
Healthcare
Location:
Munich, Germany

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Owner at Ironwood Care GmbH. We operate in Healthcare and most of our customers are in and around Munich, Germany.
What specific problem or business challenge led you to hire this company?
We needed to rebuild a slow, outdated web app and move it to a new framework, and we didn't have the in-house capacity to do it ourselves.
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?
Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.
How was your overall experience with their communication and project management?
Good. Weekly calls, regular updates and a shared board meant we always knew where things stood.
Did the company deliver the project on time and within your expected budget?
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

Divya Agarwal / Project Manager | Jun 15, 2026

Our experience with Underline Labs was really positive from start to finish. Their project manager kept things organised and was quick to flag anything that might affect the timeline. They shared working builds regularly, so we could test early and give feedback before things were locked in. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building.

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 partnered with Underline Labs to set up a sensor network and alerts for our cold storage facilities. The project was split into milestones, with a working build shared at the end of each one. The project took roughly 4 months from kickoff to launch.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 4.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
IoT Development
Project Cost:
$150,000 to $499,999
Project Duration:
Dec 2025 - Apr 2026
Business Type:
Legal Services
Location:
Mumbai, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Copper Leaf Legal Pvt Ltd is a Legal Services business in Mumbai, India. As Project Manager, I was responsible for this project on our side and the main contact for Underline Labs.
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 set up a sensor network and alerts for our cold storage facilities.
What services did the company provide for your project?
Mainly IoT 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?
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?
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 would recommend them and we plan to work with them again.

Great Experience With Underline Labs on Our IoT Development Project

Maria Foster / CEO | Jun 15, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. They shared working builds regularly, so we could test early and give feedback before things were locked in.

Feedback from our customers has been very positive so far.

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

Project summary

Our company worked with Underline Labs 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. The engagement ran for about 8 months.

  • Overall Rating 4.5
  • Quality 4.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
IoT Development
Project Cost:
Less than $10,000
Project Duration:
Sep 2025 - May 2026
Business Type:
Human Resources
Location:
Portland, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Fairway HR is a Human Resources business in Portland, USA. As CEO, I was responsible for this project on our side and the main contact for Underline Labs.
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?
Mainly IoT 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?
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?
Mostly. One milestone slipped by about a week, but the final delivery was on schedule and the budget held.
What tangible results or business impact have you seen since the project was completed?
Our team saves several hours a week, and we have had very few issues since launch.
What did you like most about working with this company?
The consistency. Same team, same standard, from the first week to the last.
Would you recommend this company to others, and would you work with them again?
Definitely. We have already started talking about the next phase.

Honest advice and solid execution

Sneha Verma / Founder & CEO | Mar 29, 2026

The project went well overall. 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.

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. Happy to recommend them.

Project summary

Underline Labs was brought in to build a demand forecasting model on top of our sales data. Scope included discovery workshops, development in two-week sprints and a short support period after launch. We worked together for around 7 months.

  • Overall Rating 4.0
  • Quality 4.5
  • Schedule 4.0
  • Project Cost 4.0
  • Willing To Refer 5.0
Project Type:
AI & Machine Learning
Project Cost:
$10,000 to $49,999
Project Duration:
Jul 2025 - Feb 2026
Business Type:
Human Resources
Location:
Ahmedabad, India

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Greenfield HR Pvt Ltd is a Human Resources business in Ahmedabad, India. As Founder & CEO, I was responsible for this project on our side and the main contact for Underline Labs.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to build a demand forecasting model on top of our sales data before our busy season.
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?
They had relevant experience in Human Resources 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?
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?
Definitely. We have already started talking about the next phase.

Good results, communication improved as the project went on

Georgia Stewart / Director of Technology | Mar 07, 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. Even with the time zone difference, responses usually came the same day and we never felt left in the dark.

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. I would recommend Underline Labs to anyone looking for a dependable AI & Machine Learning partner.

Project summary

We partnered with Underline Labs to build a demand forecasting model on top of our sales data. 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 3.5
  • Quality 3.5
  • Schedule 4.0
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
AI & Machine Learning
Project Cost:
$500,000+
Project Duration:
Jun 2025 - Feb 2026
Business Type:
Energy & Utilities
Location:
Adelaide, Australia

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director of Technology at Copper Leaf Utilities Pty Ltd, a Energy & Utilities company based in Adelaide, Australia. 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 demand forecasting model on top of our sales data so they could focus on customers.
What services did the company provide for your project?
AI & Machine Learning, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
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?
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?
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.

Dependable Quality Assurance & Testing Partner for a Growing Telecommunications Business

Stephanie Coleman / Managing Director | Feb 23, 2026

Our experience with Underline Labs 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 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.

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

We hired Underline Labs to run performance and load testing ahead of a big launch. 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 4.5
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Quality Assurance & Testing
Project Cost:
$10,000 to $49,999
Project Duration:
Jul 2025 - Jan 2026
Business Type:
Telecommunications
Location:
Columbus, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as Managing Director at Brightpath Connect Inc. We operate in Telecommunications and most of our customers are in and around Columbus, USA.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to run performance and load testing ahead of a big launch before our busy season.
What services did the company provide for your project?
Quality Assurance & Testing, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
Their pricing was fair and they were honest about timelines instead of just telling us what we wanted to hear.
How clearly did the company understand your requirements and business goals?
Better than we expected. They pointed out a few things we had not thought about.
How was your overall experience with their communication and project management?
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?
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.

Quality work, a little slower than we planned

Mark Foster / Marketing Director | Jan 21, 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. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later.

Feedback from our customers has been very positive so far. Their team changed one developer midway, which slowed things down for a couple of weeks. We would definitely work with them again.

Project summary

We engaged Underline Labs to take over manual and regression testing before each release. Scope included discovery workshops, development in two-week sprints and a short support period after launch. Overall it was a 5-month engagement.

  • Overall Rating 3.5
  • Quality 3.5
  • Schedule 3.5
  • Project Cost 3.5
  • Willing To Refer 5.0
Project Type:
Quality Assurance & Testing
Project Cost:
$50,000 to $149,999
Project Duration:
Jul 2025 - Dec 2025
Business Type:
Legal Services
Location:
Denver, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Copper Leaf Partners is a Legal Services business in Denver, USA. As Marketing Director, I was responsible for this project on our side and the main contact for Underline Labs.
What specific problem or business challenge led you to hire this company?
We needed to take over manual and regression testing before each release, 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 Quality Assurance & Testing — 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 Legal 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 Legal 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?
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?
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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