Modern Mustard Seed. Loud where it counts. Tailored everywhere else.

Modern Mustard Seed is a boutique design and agentic systems studio in Kalispell, Montana, founded by Sarah Scarano. Five disciplines: design-led websites and brand, custom software, voice agents, marketing (social posting, blog writing, commercials, and ads), and retained advisory for operators putting agentic systems into a business that already works. We work with clients across Northwest Montana and throughout the United States.

Sarah Scarano is the founder, designer, and engineer behind Modern Mustard Seed. She is a full-stack engineer and agentic systems architect who has shipped products across agentic systems, e-commerce, real estate, hospitality and SaaS. She sets the direction on every engagement and stays on it from the first note to the handoff.

With a written inquiry at modernmustardseed.com/inquire. Sarah reads every one herself and replies inside one business day. If it is a fit, the next step is one working conversation, then a written scope with a set package price and a fixed timeline.

There is no price list, because the right answer depends on what you are building. Every engagement is scoped and quoted privately as a set package price, agreed in writing before work starts, and it does not move. Advisory is retained by the quarter.

No. Changes to what we built are included, permanently. There is no change order and no second invoice. Work that adds a deliverable we never agreed to build is a new engagement, quoted the same way as the first.

A website or a voice agent is typically live within a week or two of kickoff. Custom software, full applications, and stores are deeper builds and usually run two to six weeks. The timeline is fixed in the proposal alongside the price.

Retained counsel for operators putting agentic systems into a business that already works. What to build, what to refuse, what to automate, and in what order. It is engaged by the quarter and it is often the right first step when the answer is not yet a specific build.

React 19, Next.js 16, TypeScript, Tailwind CSS, Supabase, Stripe, Vercel, Trigger.dev, Expo and React Native for mobile, plus Anthropic Claude, OpenAI, and Google Gemini for the models. Vapi for voice agents. The same stack across every engagement, refined in production.

Yes, outright. You receive the repository, the live deployment, the accounts, and the documentation to run all of it without us. We build assets you own, not a dependency on the studio.

Recent work includes Wild Hope, a Flathead Lake retreat village told through seventeen original oil paintings; Cross + Covenant, a direct-to-consumer apparel brand taken from sketch to live storefront in sixty days; Lago Society, a lakeside fashion house with an agentic personal stylist; Fiat Lux Design, an agentic staging studio for real estate; and D&D Landscaping, a design-build landscaper with a full back office behind it.

No. Most clients run a business that already works and want a product built without hiring a team. The first conversation translates the goal into a scoped build, in plain language.

The name comes from the mustard seed parable in Matthew 13: the smallest seed in the field grows into a tree the birds perch in. Every build here starts seed sized, and that is the plan. The studio builds enduring digital assets from a single, carefully developed idea.