Siri co-founder backs Helix, which wants four spoken numbers to replace CAPTCHA

Helix, a voice verification startup founded in 2025, has raised $6 million in a round led by Chicago Ventures, with Siri co-founder Dag Kittlaus backing the company and joining as an advisor, TechCrunch reported on Nov. 11, 2026.

CAPTCHA is losing to bots that solve puzzles better than people do, and age-verification laws keep demanding ID uploads nobody wants to hand over. Helix's pitch threads that needle: prove you're a human adult with your voice, keep nothing. The catch is the arms race: voice cloning is exactly the thing getting better fastest, and Helix itself admits it can't yet catch AI agents on a live call.

Helix, a voice verification startup founded in 2025, has raised $6 million in a round led by Chicago Ventures, TechCrunch reported on Nov. 11, 2026. BAM Ventures, Aglaé Ventures, Corazon Capital, Tusk Ventures, Yonder Ventures, Rule30, and Brown Alumni Group also took part. Dag Kittlaus, a co-founder of Siri, is backing the company and joining as an advisor. Chicago Ventures lists the round as a seed. A seed is the early private check, before a larger round. The amount, the investors, and Kittlaus's role are TechCrunch's account. The seed label is on Chicago Ventures' portfolio page.

The founders are Alex Oberg, Anna Dorofiyenko, and Mike Hall. Oberg previously worked at Ticketmaster, which acquired his startup, and he helped create Ticketmaster's Verified Fan system, a check meant to keep bots from buying tickets. Dorofiyenko led data science teams at Live Nation and Zillow. Hall worked at Nike and at Tinder, where he helped develop the first matching algorithm. Those biographies are TechCrunch's.

The product, as Helix describes it, asks a person to speak four numbers. The check takes about 4 seconds and runs on that person's own device. The business gets a result. It does not get a recording, a face, or an ID. Helix names the uses as age assurance, a human-or-bot check at sign-up, biometric MFA, and catching ban evasion. A human-or-bot check is the job a CAPTCHA does today. A CAPTCHA is the puzzle a website shows to tell a person from a program. Biometric means a measurement of the body, here the voice. MFA is multi-factor authentication, a second check at login, often a code sent by text. Ban evasion is someone trying to come back after a site kicked them out. Those product lines are Helix's.

Helix's own claims for the check: 96.8 percent accurate at the 18-and-over age gate, it catches 99.6 percent of AI-generated voices on the newest engines, and it costs about half of an SMS code. An age gate is the line that decides whether someone is old enough. An SMS code is the text message a site sends as a login check. Helix also says the check runs locally even on an iPhone 13. Those figures and the phone line are company claims. An outside lab has not signed them.

Helix says a customer, Zeel, an in-home healthcare provider, uses the check to verify providers who visit homes. The company says it is exploring the same kind of check for workers such as cab drivers, and piloting voice as a biomarker for drunkenness or distress. A biomarker is a measurable sign of a condition. The Zeel use, the cab-driver exploration, and the pilot are Helix's. The pilot is not a finished product.

Oberg has named the limits. The check cannot reliably tell if someone is lying. It does not identify individual speakers. He says a stored voiceprint, a pattern saved from the voice, cannot be used to reconstruct that voice. It is not yet able to reliably detect AI agents on a live phone call. Those limits are his.

Oberg is quoted: "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." The quotation is his, as TechCrunch reported it.

The picture is Helix co-founders Alex Oberg, Anna Dorofiyenko, and Mike Hall in a living room, two seated on a brown leather couch and one perched on its arm. The credit is Coy Gutierrez / Helix, as carried by TechCrunch.

In plain terms, a startup founded in 2025 raised $6 million, led by Chicago Ventures, for a check that asks you to say four numbers and tells a business whether you sound like a human adult, without keeping the recording. Siri co-founder Dag Kittlaus is advising. The accuracy numbers are Helix's claims. Oberg says it still cannot catch an AI agent on a live call, and it cannot tell whether you are lying.