Siri Co-Founder Dag Kittlaus Backs Helix's $6M Voice ID Round

Helix has raised $6 million to prove you're human with a four-second voice challenge — no CAPTCHA, no photo ID, no personal data handed over.

Chicago Ventures led the round, with BAM Ventures, Aglaé Ventures, Corazon Capital, Tusk Ventures, Yonder Ventures, Rule30 and Brown Alumni Group participating. Dag Kittlaus, co-founder of Siri, is backing the startup and will serve as an advisor.

Helix was founded in 2025 by Alex Oberg, Anna Dorofiyenko and Mike Hall. The résumés are concrete: Oberg previously worked at Ticketmaster, which acquired his startup; Dorofiyenko led data science teams at Live Nation and Zillow; Hall has worked at Nike and Tinder, where he helped develop the initial matching algorithm.

Why voice, and why now?

At Ticketmaster, Oberg played a role in creating Verified Fan, the system designed to keep bots off the platform. As AI advanced, he started thinking along the same lines for a new solution.

"As AI started to come up in the last two years, I was realizing that it's going to make it increasingly difficult to determine who's human and who's not on the Internet. Identity on the Internet's always been about proxies for identity, right? It's your email, it's your phone, it's your IP address, it's your device fingerprint, it's your device ID," Oberg said.

With the rise of AI agents like Instinct and Muse, Oberg argues the industry needs to rethink human identity online and lean on biometric signals like voice. That's where Helix comes in.

What does the technology actually do?

Helix's core technology runs directly on a user's device. It can determine whether someone is human and estimate their age. The company says its model can run locally even on an iPhone 13, which keeps deployment costs minimal.

The startup can deploy the tech to replace or supplement CAPTCHA and help block bot attacks. It's also running pilots to explore whether voice can work as a biomarker to detect conditions such as drunkenness or distress.

One customer is already live: Zeel, an in-home healthcare provider, uses Helix to verify the identities of providers visiting customers' homes. Oberg said verifying workers such as cab drivers is another use case the startup is exploring.

The takeaway: the tech runs on the phone, so the privacy claim and the cost claim reinforce each other.

Can voice settle the age-verification fight?

Oberg points to age-verification regulations for social media platforms around the world, which he says force users to trade privacy for access. Helix's voice technology, he argues, offers an alternative.

"There's like an avalanche of regulation coming down because essentially society has decided children should not be able to use the Internet as adults. That has created a bit of a strawman argument that everyone needs to trade their privacy for the sake of security and child safety. We are that company that's saying, nope, don't agree. It's a four-second voice challenge," Oberg said.

What are the limits — and Kittlaus's bet?

Oberg is explicit about what Helix can't do. The technology cannot reliably detect whether someone is lying. It doesn't identify individual speakers. And he claimed that even if the company stores a voiceprint, it can't be used to reconstruct a person's voice.

AI-powered fraud is also a growing problem in phone calls, but Helix says its technology isn't yet capable of reliably detecting AI agents during live calls.

Kittlaus, for his part, said voice identification technology has finally reached the point where it works reliably, positioning Helix to scale as AI-powered fraud increases. He also credited the startup's model compression with giving it a cost advantage.

"What folks at Helix are doing is, instead of teaching computers how to understand speech, these guys are understanding, what the speech of the speaker actually means, what's going on with them, who they are they lying, are they impaired? That side of it is fascinating to me within the larger picture that I just described," Kittlaus told TechCrunch.

With $6 million in the bank, a Siri co-founder advising and one paying customer, Helix now has to show that a four-second voice challenge can beat both the bots and the regulators.