Agentic voice for any business.
Inbound or outbound. Outerstack designs, builds and runs voice agents and the software around them, wired into your calendar, CRM and phones.
Don't take our word for it.
Take Smith's call.
Smith is the agentic voice we built to show what we mean. It researches a business in about 15 seconds, takes calls, looks things up mid-call, books meetings and hands off to a human.
Give Smith your website. Then take its call.
Smith reads your public site, then phones you so you can play the customer.
- 01Researches a business in about 15 seconds
- 02Takes the call, inbound or outbound
- 03Looks things up mid-call
- 04Books meetings on a real calendar
- 05Hands off to a human
SmithNot by that name, but our cream cheese wontons are basically the same thing. Six ninety-five.
CallerPerfect. Two of those for pickup at six?
SmithYou got it. Two orders, ready at six. What name should I put it under?
Part studio.
Part of your team.
AI-accelerated venture building. Experienced engineering, working alongside your team. We build our own ventures and help customers make software useful and maintainable.
Venture building
Build our own ideas and work with founders on theirs. Use AI to explore and iterate, then test what matters.
Ask Smith about thisForward-deployed engineering
Work alongside your team to make decisions, build software and get it into use.
Ask Smith about thisUseful, maintainable systems
Improve the software you already have: connect tools, simplify workflows and address the technical gaps that slow people down.
Ask Smith about this
We build our own.
Then we run them.
Live products we designed, built and operate ourselves. The same team, and the same way of working, is what you get when we build with you.
FYNAI personal financeThe money app that does the work for you. It sorts every purchase, keeps budgets and bills current, and catches what you'd miss, like a double charge or a price hike. Bank sync, tap to pay, receipts, and it works inside ChatGPT and Claude.fyn.fyi 
SmithAI voice agentForges a voice agent from any website in about 15 seconds, then answers the phone or calls customers: looks things up mid-call, books real appointments and hands off to a person. It's also who answers for us.smith.outerstack.com We can build it around
any business.
Smith shows the industry doesn't matter: the same approach answers, books, follows up and reminds, for anyone. These use cases are examples of what we can build around yours, not a list of the only ones.
After-hours call answering that books real jobs
An AI phone assistant picks up every call — nights, weekends, when you're elbow-deep in a condenser.
See the examplePhone answering, reservations, and takeout orders
An AI phone assistant answers every call, every time — hours, directions, “do you have gluten-free?”, party of six at 7:30, an order for pickup.
See the examplePhone answering and appointment booking
An AI assistant answers every call — 'do you see rabbits?', 'can I get a refill?', 'Bella's limping, how soon can you see her?' — books the visit into your calendar, flags true emergencies to staff immediately, and texts the owner a confirmation.
See the exampleClient intake triage
New inquiries — web form, email, or phone — are met by an assistant that gathers the facts, checks for conflicts-of-interest keywords, flags urgency and statute-of-limitations concerns, and hands you an organized brief before the first call.
See the exampleAppointment reminders that get confirmed
Smart reminders by text, email, or a friendly automated call — timed to each patient's habits, easy to confirm or rebook in one tap.
See the exampleLead follow-up that never goes cold
Every inquiry gets a fast, personal-sounding response, then a sequence tuned to where they are — casually browsing vs. pre-approved and hunting.
See the exampleStatus updates and maintenance reminders
Customers get automatic 'your car is ready' and 'parts arrived, want to book?' texts, and mileage-based reminders bring them back when service is actually due.
See the exampleSomething nobody's built yet
We design agentic voice around your workflow, your data and your phones.
Talk to Smith about yoursStart with the work.
Make the next step useful.
Understand
Understand the people, tools and constraints.
Build
Use AI where it helps, and engineering judgment where it counts.
Hand over well
Test the change, document it, and agree who will run it.
AI brings momentum. Engineering gives it direction.
Talk to Smith.
It'll get you to us.
The agent we'd build for you is the one answering here. Ask about Smith, the studio or forward-deployed engineering, and it'll find you a time with the team.
Try Smith on your businessSmithHey, I'm Smith, the AI agent Outerstack builds. Ask me what I could do for your business, about our studio and engineering work, or I can find you a time with the team.
Smith is an AI. Chats are saved so the Outerstack team can follow up.