Happy Clients

Whether you're building something from scratch or expanding your existing products, our engineers can build it for you like we have for these startups. Read more detailed reviews on Clutch.

“HorizonLabs Team is one of the most technically gifted leaders and engineering teams I've ever worked with! They are swift executors and also generally very likable people who are fun to work with. We are very fortunate to have worked with them!”

Sonny Mo

Co-Founder/CEO @ 
Bloom (YC W21)

“Horizon Labs vastly increased our visibility into technical workflows and capacity to achieve projected outcomes. They have a fast and reliable team with exceptional integrity and commitment to doing a good job. Thanks horizonlabs!”

Marcus Ellison

Co-Founder/CEO @

“We worked with another agency and faced surprising costs because of unthought estimations. Working with HorizonLabs enabled us to work without surprises with well set estimations and expectations.”

Victor Tang

Chief Product Officer
@ Corros

"They absolutely nailed it, getting everything done on time and without busting the budget. Seriously, their game was on point! They kept things smooth throughout. Major props to them and can't wait to work on more stuff together."

Josh Archer

CTO @ Arketa

"Horizon Labs is extremely communicative, talented, and reliable. They feel like part of our company, even though they’re outsourced."


Reviewed on Clutch

"Great communication and fast turnaround on sprints. They are a high-quality, responsive team."


Reviewed on Clutch

Startup Expertise

From startups to scaleups, our leadership team has rich experiences and relationships to solve product problems with. We love what we do and are always talking to startup founders.


Kurt led the team and worked with Curtsy's CTO and CEO to improve their web app and build an Android app from scratch. React, Typescript, and Node.

Joyride Games

Kurt led the team and worked with Joyride Games' CEO to create ML models that better project user churn. Vertex AI


Sinan is the co-founder and CTO of Kidsy.co, a digital marketplace focused on baby and kid products. Sharetribe, React, Typescript, and Node.


Sinan led the team and worked with the CTO to containerize their codebase, dev-ops pipeline, and preview environments in GCP. Docker, Google Cloud Platform


Kurt was the co-founder and CTO of Commons, an Audio-first communication platform for distributed teams of all sizes, acquired by Pulse, which was then acquired by Mozilla.


Sinan was the co-founder and CTO of Cuboh, an app that automates online food orders and ordering for restaurants. Part of Y-Combinator S19. Find Sinan on Bookface.

Services & Capabilities

We build custom applications tailored to your unique business needs. Our team of expert engineers will work closely with you to deliver high-quality, scalable solutions at affordable on-shore and off-shore rates.

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Custom App

We specialize in creating custom applications that are designed to meet your specific requirements and objectives, including MVPs and prototoypes with your customers in mind.

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Need additional engineering resources? We can provide skilled professionals to augment your existing team with on-shore and off-shore talent in Turkey, or we can find talent for you to hire in-house.

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Our experienced CTOs Sinan and Kurt can provide strategic guidance and technical leadership to keep projects focused and shipping regularly. We are always helping founders plan and run experiments.

About Horizon Labs

Our leadership team is split between Silicon Beach (Irvine and Santa Monica), Silicon Valley (San Francisco Bay Area), and Turkey (Ankara). We love fast cars, kebabs, tech gadgets, and building startups with our wives. Yes, really! Interested in working with us? Please contact one of us directly or email info@horizon-labs.co

sinan sari ycombinator cuboh software engineer


Software Engineer

cagatay kurt software engineer snap microsoft commons


Software Engineer

kendall eagle horizon labs


Software Engineer

saif akhtar planet n orionckb constellationck pinfluence startup studio


Mechanical Engineer


Don’t hesitate to reach out if you have any questions!

How are projects or enagagements structured?

We offer flexible pricing models tailored to your project's needs, including fixed-price for defined scope projects and hourly rates for short-term and long-term collaborations. Our goal is to provide you with cost-effective solutions without compromising on quality. Here is a blank example of our contract.

What services does Horizon Labs offer?

We specialize in custom software development, AI & machine learning services, cloud infrastructure, UI/UX design, quality assurance, and strategic IT consulting. For a detailed overview, please visit our Services page.

What industries do you typically serve?

We cater to a diverse range of industries, including SaaS, finance/fintech, healthcare/healthtech, e-commerce, marketplaces, education/edutech, and more. Our team has the expertise to handle unique challenges across different sectors.

What are Horizon Labs' billing terms?

We bill at the end of each 2-week sprint (approximately twice a month, on the first and fifteenth). If for any reason you aren't happy with the previous sprint, we encourage you to not pay the invoice until we've resolved your concerns. The amount you see in the signed contract is the amount you pay.

How often are progress check-ins?

You'll be assigned a Technical Account Manager and a non-Technical Account Manager. Both of them will be available for weekly check-in calls. Plus, we use Google Spaces, Slack, or Discord (depending on client preference) to keep communication async unless urgent.

What technologies do you work with?

We work with a wide range of modern technologies, including but not limited to Python, JavaScript, React, TensorFlow, AWS, Azure, and more. Our technical stack is tailored to each project's needs as we have the ability to find additional talent very easily.

How do you ensure the quality of your projects?

Quality is paramount to us. We employ rigorous testing, both manual and automated, at various stages of the project. Our QA team ensures that the final product meets your highest standards, and we extend maintenance and support to fix items in-scope long after the contract has ended.

Can you provide references or case studies from previous projects?

Certainly! Please visit our Portfolio page to view some of our standout projects. References can be provided upon request.

Do you outsource projects to a 3rd party, or are your engineers in Turkey considered "in-house"?

Our engineers in Turkey are our employees and managed by our co-founder in Ankara. If your requirements cannot be fulfilled in-house, we'll let you know before searching for talent. We encourage these contractors to prove themselves and join your team as full-time employees after the engagement ends.

Who owns the working code & product environments?

We push working code to your repositories at the end of each iteration with sufficient in-code documentation. Your code is bundled with a simple CI/CD pipeline to Dev, Staging, and Prod environments owned by you but managed by us. We'll maintain a master doc (Readme) and vault containing your directory of assets, environments, repos.

What measures do you take to protect data security, intellectual property (IP), and confidentiality?

Protecting your IP and data security is our top priority. We implement strict confidentiality agreements and security protocols to safeguard all project-related information. Our contracts clearly outline IP rights, ensuring that the intellectual property developed during the project remains yours.

How do you handle communication across different time zones?

Effective communication is key to the success of any project. Our on-shore team is available 9am - 9pm Pacific Standard Time, while our engineers in Turkey overlap between 3am - 12pm Pacific. We prefer asynchronous communication using tools like Slack, Google Spaces, or Discord to maintain clear and continuous communication between our developers and your team.

Can your contract developers integrate with our in-house team?

Absolutely! Our contract developers are experienced in integrating with in-house teams, participating in standups, and adapt to your company culture. We believe in transparency and collaboration as the foundation for a successful partnership.

What is your approach to project management and reporting?

We follow agile project management practices, allowing for flexibility and iterative development. Regular updates, sprint reviews, and access to a dedicated project manager & non-technical account manager ensure that you are always informed about the progress of your project.

How do you handle changes in project scope or requirements?

We understand that project requirements can change, especially for startups who are moving fast and breaking things. Our agile methodology allows us to accommodate changes efficiently. We work closely with you to assess the impact on timelines and costs, ensuring that we align on any adjustments needed.

What happens if we decide to hire a contract developer full-time?

We offer a transparent process for clients interested in transitioning contract developers to full-time positions. Terms and conditions for such arrangements can be outlined in our initial agreement, ensuring a smooth transition for both parties. We encourage our contracted developers, especially offshore, to consider joining companies they enjoy working for.

Do you offer services in exchange for equity?

Not immediately unless you are referred from our network or Bookface. We require that our teams work together on a paid project together before we consider services in exchange for equity. Many of our clients utilize Sinan, Kurt, and Saif's experience when necessary, and we're always happy to make introductions within our network.

Let's Build Something Great Together!

With tons of co-founder/CTO & GTM experience with tech startups, our team is a strategic partner along your crazy startup journey.