We Build Products
With AI
We design, build, and ship AI, blockchain, and cloud products, from first prototype to production.
Start a ProjectCore Technologies
Example Work
Most of our work ships under NDA. These are representative engagements with identifying details removed.
Kayak-Style Search for Doctors
A clinical search platform that uses AI agents, RAG, and other techniques to recommend and compare prescription options against ICD-10 code indications.
Infrastructure Cost Audit
Advisory engagement that uncovered a major bug causing tens of thousands of dollars in excess RPC spend per month.
Agent Platform
From 0 to 1
The previous team burned 8+ months and shipped nothing. We built a custom, production-grade AI agent platform from zero to live in one month.
What We Learned Shipping
First-hand writing on AI product decisions, agent-driven development, and shipping systems to production.
AI Pilled: A Case Study
How I built Cold Reach, a procedural sci-fi dungeon crawler, with semi-autonomous AI agents, and why experienced engineers remain essential.
Read article →RAGShipping RAG to production: what actually matters
A RAG demo takes an afternoon. A RAG system real users trust is a different animal. The things that decide whether retrieval-augmented generation works in production: retrieval quality, evals, grounding, and guardrails.
Read article →Agent-Driven DevelopmentAgent-driven development: how we actually use AI coding tools
Agent-driven development multiplies what a senior engineer can ship without giving up code quality. How we use Claude Code, Codex, and Cursor in practice, and how to adopt it on a team without creating technical debt.
Read article →AIHow much does it cost to build an AI MVP?
What an AI MVP actually costs, and what drives the budget: scope, integration, and data, not the model. A scope-first framework to ship in weeks.
Read article →AIBuild vs buy: custom AI or off-the-shelf?
Build vs buy for AI: when an off-the-shelf tool wins, when a custom build wins, and the total-cost questions teams forget to ask.
Read article →EvalsEvals for LLM apps: why you cannot ship a reliable AI feature without them
You cannot ship a reliable AI feature on vibes. How to build a small, honest eval set, run offline and online evals, and turn argument into measurement.
Read article →Founder-Led Engineering
Omnihash, LLC is a Chicago software firm founded by Evan Cottrell. We build production software in health-tech, travel-tech, promotions, and AI-driven products. It's independent and founder-led: no account managers, no hand-offs. The person you talk to is the person who writes the code.
Results-Driven
Every engagement starts with a measurable target and ends with it hit, or honestly explained.
Current, Not Trendy
We adopt new technology when it's ready for production, not when it's on a conference slide.
Built for the Long Run
Most of our work is repeat work. We optimize for the second project, not the invoice.
Have a Project in Mind?
Send a couple of sentences about what you're trying to build. We'll reply with how we'd approach it.
Email us:
Open mail app →Common Questions
Who does Omnihash work with?
We work with startups, SMBs, and enterprises investing seriously in a product. We're a senior, founder-led boutique software firm, so you work directly with the engineers building it — no account managers or hand-offs.
How much does an AI, MVP, or cloud project cost?
Engagements are project-based or a monthly retainer, scoped to your goals. We focus on production-grade work rather than the lowest bid, and most clients are funding a real product. We give a clear estimate after a short scoping conversation.
How quickly can you ship?
It depends on the project and scope — from a few days for a focused build, to weeks, to over a month for a larger platform. As one data point, we took a production-grade AI agent platform from zero to live in a month.
Can you add AI to our existing product?
Yes. We wire LLM features, RAG, and agent systems into existing products and stacks — not just greenfield builds.
Do you work with companies outside Chicago?
Yes. We're based in Chicago, IL and work with clients remotely across the US and worldwide.
Tell Us What You're Building
New build or existing system: send us the problem and we'll tell you how we'd approach it.
Email us:
Open mail app →