Helix has raised $6.2 million to develop voice-based identity verification technology that helps websites distinguish human users from AI-powered bots without requiring personal documents or facial scans. The startup’s technology can run directly on smartphones, allowing users to verify that they are human and estimate their age through a short voice challenge.
The funding round was led by Chicago Ventures, with participation from BAM Ventures, Aglaé Ventures, Corazon Capital, Press On Ventures, Tusk Ventures, Yonder Ventures, Rule 30, and Brown Angel Group. Siri co-founder Dag Kittlaus also invested in Helix and will serve as an adviser.
Helix Uses Voice Technology to Verify Human Users
Founded in 2025 by Alex Oberg, Anna Dorofiyenko, and Mike Hall, Helix is developing an alternative to conventional identity verification methods such as CAPTCHA challenges, facial recognition, and government-issued identification checks.
The company’s technology analyzes voice signals to determine whether a speaker is human and estimate their age. Helix says its models can operate locally on devices as old as the iPhone 13, reducing reliance on cloud infrastructure and limiting the need to transmit sensitive information.
Oberg previously helped develop Ticketmaster’s Verified Fan system, which aims to prevent automated bots from accessing ticket sales. He said advances in AI have made traditional methods of distinguishing humans from automated systems increasingly difficult.
The startup is also conducting pilot projects to investigate whether voice signals can indicate conditions such as impairment or distress. However, Oberg acknowledged that the technology cannot reliably determine whether someone is lying.
Voice Verification Could Replace CAPTCHA and Support Age Checks
Helix plans to offer its verification technology to businesses seeking to prevent bot attacks and authenticate users. Potential applications include online marketplaces, social media platforms, and services that require workers to verify their identities.
One customer is Zeel, an in-home healthcare provider that uses Helix to verify the identities of professionals visiting customers. The company is also considering applications involving drivers and other workers who must regularly confirm their identities.
Age verification represents another potential market as governments introduce stricter requirements for online platforms serving minors. Oberg argues that a brief voice challenge could offer an alternative to uploading identity documents or providing facial images.
Startup Targets Privacy-Conscious Identity Verification
Helix says its technology can verify that users are distinct human speakers without identifying them individually. The company also claims that stored voiceprints cannot be used to reconstruct a person’s original voice.
Despite these capabilities, Helix acknowledges important limitations. Its system is not yet reliable enough to identify AI agents during live telephone conversations, where synthetic voices are increasingly used in fraudulent activity.
Kittlaus said improvements in voice analysis and model efficiency have created new opportunities for identity verification. He believes Helix’s ability to compress its models for on-device processing could provide a cost advantage as demand for automated identity checks increases.
Featured image credits: Magnific.com
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