Your Get-Things-Done Engineers

Horizon Labs is a product development agency for teams that need to move fast without breaking things. Founded in 2019 out of YC, we partner with engineering leaders, SMB owners, marketplace operators, and startup founders to ship products their customers love.

Use our AI agent to explore our case studies, tech stack, capabilities, pricing, and resources. Every engagement is backed by clear estimations, 6-month code warranty, US hours (6am-6pm Pacific), with contracts and IP protections under US law.

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AI Concierge

Project scoping, pricing, Sharetribe, and build guidance

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Horizon Labs AI Concierge

Welcome to Horizon Labs. I can help you scope a build, compare package options, talk through existing codebases, or point you to the right next step when you're ready to talk to a human at /contact.

I have an app idea - where do I start?

We need engineering help but cannot hire full-time

We have a live product and want to add AI to it

Can I see examples of what you have built?

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Track 1 // Launch a new App with AI

Building something new?

Fixed-price packages. No hourly billing disputes. Clear scope, clear timeline. 6-month warranty. Prices are ~50% below our standard hourly equivalent — made possible by senior engineers using AI to cut time without cutting quality.

Our fixed-price guarantee applies to net-new code we write from scratch. Already have a codebase? We'll review it free and tell you honestly whether we can work with it under the same terms, or if a different approach makes more sense. Otherwise we prefer being able to control the codebase from start to finish.

Wireframes & Designs

Dev-Ready Product Wireframes

Fixed price · 14-day turnaround

$2,500/ 14 days

We turn your idea into a working Figma file and clickable prototype app that founders can test with users, investors, and their own team before development starts. We document screens, workflows, user flows, interaction logic, and edge cases so engineers can follow the blueprint instead of guessing. Credited in full toward MVP Launch if you continue — your remaining MVP scope is reduced by $2,500. Payment: $1,250 at signing, $1,250 after delivery and approval.

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Custom MVP Launch

Custom MVP Built with AI

Fixed price · Launch within 60-90 days

$15,000-$30,000/ 60-90 days

A production-ready web app built from scratch by senior engineers, with AI woven in where it moves the needle, not bolted on for show. Documented, security-reviewed, and SEO-ready at launch. 6-month warranty on all delivered code. Payment: 6 × $2,500-$5,000 — first sprint 2 weeks after signing, last after delivery and approval.

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MVP + GTM — Most Popular

Launch + Go-to-Market

Fixed price · Launch with advanced SEO in 60-90 days

$25,000-$40,000/ 60-90 days

Everything in the Custom MVP, plus the GTM engine that lands your first users: ICP definition, advanced SEO, weekly human-written posts paired with AI content, automated social publishing, and behavior-targeted analytics. Payment: 6 milestone-based installments matched to final scope — first sprint 2 weeks after signing, last after delivery and approval.

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Track 2 // Senior Technical Partners

Already have a product or need something more demanding?

Senior specialists on demand. Hourly, scoped by sprint, with a 6-12 month warranty on all delivered code.

Custom Software Dev

Front-end / Back-end / Full-Stack

Startup and small-business rate

$120+/ hour

Senior full-stack engineers on demand for net-new builds, experiments your team is too busy to run, or backlog you need cleared. 10+ years average experience, overlapping US hours, direct Slack access. You own every line in your GitHub org. Code only touches AI in secure environments.

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AI Development

Custom AI Engineering

MAANG + YC Engineers

$200+/ hour

Senior AI specialists for teams shipping real systems — voice and real-time speech, multi-agent orchestration, and local or on-prem LLMs on open-source stacks (Llama, Whisper, vLLM, LangGraph, LiveKit). We own the eval loop and leave you with a system your team can run without us.

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Go-to-Market Engineering

Flat monthly retainer · 3-month engagement

$5,000/ month

For launched products that need a real growth engine. We audit what you already have, fix the gaps, or build the system from scratch: ICP clarity, technical SEO, content strategy, human-written posts paired with AI workflows, analytics, and automated distribution. Goal: kickstart organic traffic or help existing traction grow 2x-4x within 3 months, with systems that keep running after the engagement ends.

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Testimonials.

It doesn't matter what sized project you give us, Horizon Labs is dedicated to providing the very best product engineering experience to teams who trust us to build with them.

Sonny Mo

Co-Founder & CEO @ Bloom (YC W21)

“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!”

Josh Archer

CTO @ Arketa (YC S22)

"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."

Dan Lee

Co-Founder & CEO @ Yura Health

“Horizon Labs is a high quality, responsive team with fast turnaround on sprints."

Samir Sen

Co-Founder & CEO @ FlairLabs (YC S22)

"Horizon Labs has strong skills and experience with OpenAI, LLMs, API development, Kubernetes, and cloud deployment. Their engineering support helped us deliver production-ready application we could roll out to customers fast."

Marcus Ellison

Chief Technology Officer @ TrueChoice

“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!”

Victor Tang

Chief Product Officer @ Corros

“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.”

Shraysi Tandon

Co-Founder & CEO @ Kidsy

“Horizon Labs feels like part of our company, even though they’re outsourced. They have a strong skill set and are proactive about getting things done.”

Haamid Ali

Founder @ Cresance (Alchemist + StartX)

"They were very collaborative and had excellent communication and technical expertise, keeping me informed on each step of the project through delivery."