Today we’re announcing that Sono has raised $1.5M in a pre-seed round led by Maki.vc, with participation from Wave Ventures and Failup Ventures. We’ve also joined Founders House Helsinki. The funding fuels the voice AI agents we build to answer every call — as we scale across the Nordics and Europe.
Why we’re building Sono
The phone is still a critical channel for customer service — yet in many organisations a large share of calls go unanswered at peak times. That weakens the customer experience and turns into lost revenue.
Sono makes it possible to automate more complex customer conversations end-to-end, in a way that wasn’t technically possible just a year ago. Our platform combines speech recognition, large language models, and companies’ existing backend systems into a single layer that can handle a customer-service process from start to finish.
Our agents book appointments, route calls to the right person, answer frequently asked questions, and run customer-satisfaction surveys — built specifically for high-volume environments and slotting into the systems a company already runs. Inbound or outbound, every call gets handled.
“Our goal is simple: no customer should ever have to wait on hold again. We automate routine calls so people can focus on the complex tasks that need human judgment — and that improves both the customer experience and the meaningfulness of the work.”
— Aleksi Löytynoja, CEO & Co-founder, Sono
The traction behind the round
Since launch, Sono’s agents have handled 35,000+ calls for 15 customers across 3 countries, growing 50%+ month over month. Every call is 100% EU-hosted.
That early traction is what convinced our investors that voice is ready to be automated at quality.
“Companies still lose a significant number of customers and sales opportunities simply because they can’t answer every call fast enough. Sono solves this with technology that helps companies automate high-volume customer interactions efficiently and at high quality. We believe Sono has the potential to set a new standard for how companies handle customer service and sales over voice channels in Europe.”
— Pauliina Martikainen, Partner, Maki.vc
Our customers feel it too:
“Sono won us over with determined execution and the ability to build future-facing services that are easy for end users to understand. The collaboration has been smooth, and everything has been handled professionally and exactly as agreed.”
— Jussi Hietanen, IT Manager, Käyttöauto
What’s next
The new funding goes primarily into product development and international expansion — so more businesses can answer every call without growing their teams.
- Expanding to Sweden and Europe. We’ve opened an office in Stockholm and are scaling from Finland into Sweden and the wider European market.
- From automotive to new industries. Strong in automotive customer service today, we’ve already expanded into property management and sales use cases — with more to come.
- Service and proactive sales. We’re building agents for both customer support and active, outbound sales — handling high-volume conversations at quality.
Sono (Closio Oy) was founded in Helsinki in 2025 by serial entrepreneurs, and the team is growing. If you want to see what voice AI can do for your call volume, book a demo — or sign up to get started.
