Is billiontoone.com legit or a scam?
Legitimate Nasdaq-listed diagnostics firm with confirmed billing complaints about high insurance claims and surprise patient charges for prenatal and oncology tests.
These checks passed — but they don't clear the site. A clean antivirus result, valid SSL, and a calm server only mean it isn't hosting malware; they say nothing about whether the business is real. This verdict is based on the site's conduct and content, not a malware detection.
Analysis Summary
Warning signs detected
Several risk indicators suggest caution. This site might be legitimate — but treat it as unverified until you can independently confirm.
Website Preview
Automated page render — captured in a safe sandbox. What an ordinary visitor would see when loading the site.
MT Intelligence
BillionToOne is a real, established company founded in 2015, publicly traded since 2025, with CLIA/CAP accreditation, Y Combinator backing, and strong internal employee satisfaction (4.4/5 Glassdoor, 95% Great Place to Work). The domain is legitimate corporate infrastructure with valid SSL and clean antivirus scans. However, the evidence package contains 7 documented complaints—primarily on the Better Business Bureau and Reddit—describing aggressive medical billing practices. Patients report receiving bills for $300+ and insurance claims for $10,000+ for prenatal screening tests, often without clear upfront pricing disclosure. These complaints describe billing practices as deceptive or scam-like, though they reflect a real company's actual billing model rather than a fraudulent impersonation. The company's legitimacy is confirmed by Nasdaq listing, SEC filings, NIH registry inclusion, and clinical partnerships, but the billing complaints indicate a pattern of patient dissatisfaction with cost transparency and insurance handling.
Web Research Findings
Our live research agent queries scam-report databases, consumer-review sites, news coverage, and general web search for billiontoone.com, then cross-checks business-registration records and look-alike domain patterns. Everything below is pulled from what it actually found.
- BillionToOne, Inc. is a legitimate precision diagnostics company founded in 2015-2016, specializing in non-invasive prenatal testing (Unity Complete®) and liquid biopsy oncology tests (Northstar®) using proprietary QCT technology.
- Publicly traded on Nasdaq under ticker BLLN following a 2025 IPO; reported $153M revenue in 2024 with over 100% YoY growth; valued around $4.4B post-IPO.
- Headquartered at 1035 O’Brien Drive, Menlo Park, CA; lab at 3200 Whipple Road, Union City, CA. CLIA-certified, CAP-accredited, registered in NIH Genetic Testing Registry.
- Y Combinator-backed; strong employee reviews (4.4/5 on Glassdoor, 95% Great Place to Work score); active press releases, partnerships (e.g., Epic EHR integration), and clinical publications.
- BBB rating A- (not accredited) with 7 complaints primarily related to high medical billing, insurance claims, and patient balance billing for genetic tests (e.g., $10k+ insurance claims, patient bills of $300+).
- Multiple Reddit threads discuss surprise/out-of-network billing for Unity NIPT tests, with some users describing it as aggressive insurance billing practices, though the company itself is confirmed legitimate in r/biotech discussions.
- No evidence of phishing, malware, typosquatting, or impersonation of other brands; domain matches official corporate, patient portal, and product sites (unityscreen.com, northstaronc.com).
- BBB.orgopen
"This company is engaging in medical billing fraud and harassment. I had the Aneuploidy and Carrier screens on 5/24/2024, they sent me a bill for over $300 as well as claims to my insurance for over $10,000."
- BBB.orgopen
"Medical billing scam company ! Did a genetic test our provider recommended."
- Reddit (r/BabyBumps)open
"Basically, they try to scam your insurance for as much as they can."
- Great Place to Workopen
"95% of employees at BillionToOne, Inc. say it is a great place to work compared to 57% of employees at a typical US-based company."
- Glassdooropen
"BillionToOne has an employee rating of 4.4 out of 5 stars, based on 86 company reviews on Glassdoor which indicates that most employees have an excellent experience."
- PR Newswire / Company announcementsopen
"BillionToOne, Inc. (Nasdaq: BLLN), a next-generation molecular diagnostics company with a mission to create powerful and accurate tests that are accessible to all."
BillionToOne, Inc. is a Delaware corporation (incorporated ~2015-2016), publicly traded on Nasdaq (BLLN) since 2025 IPO. Headquartered in Menlo Park, CA with lab in Union City, CA. CLIA/CAP accredited, listed in NIH GTR. BBB file opened 2021, 10 years in business.
Our research found BillionToOne, Inc. is a confirmed legitimate company: publicly traded on Nasdaq (BLLN) since 2025, CLIA/CAP accredited, Y Combinator-backed, with $153M revenue in 2024 and strong employee satisfaction (4.4/5 Glassdoor, 95% Great Place to Work). However, the evidence package contains 7 complaints primarily on the Better Business Bureau and Reddit describing aggressive medical billing practices. Patients report surprise insurance claims exceeding $10,000 and unexpected patient bills of $300+ for prenatal screening tests, with some describing the billing as deceptive or scam-like. Multiple Reddit threads in r/BabyBumps discuss out-of-network billing and aggressive insurance claims, though the company itself is confirmed legitimate in biotech discussions. No evidence of phishing, malware, typosquatting, or impersonation was found; the domain is the official corporate site matching SEC filings, NIH registry, and company announcements.
Antivirus Engines
Security Scans
Checked against the major public blocklists used by browsers and security tools — no hits.
Contact Verification
We fetched the page and looked for real-world contact details. Legitimate businesses almost always publish an email on their own domain, a phone number, and a postal address. Scam shops usually don't.
- No contact email found anywhere on the page.
- No postal address visible on the page.
- Phone number listed (00353741).
- Links to 2 social profiles.
Domain & Encryption
Redirect Chain
- 1301http://billiontoone.com/
- 2301https://billiontoone.com/
- 3200https://www.billiontoone.com/cross-domain
Server Reputation
Proceed with caution
Our automated review flagged enough risk that you should treat this site as unverified.
- Treat billiontoone.com as unverified
Do not enter credentials or send money until you have independently verified the business.
- Verify the business through independent channels
Check the company's social profiles, registry records, and search for recent news or reviews that are not hosted on the site itself.
- Never use irreversible payment methods
Crypto, gift cards, wire transfers, and cash apps offer zero buyer protection. Use a credit card or PayPal if you must pay.
- OpenShare your experience
If you have additional context, drop a comment below or post on the MalwareTips forum.
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
Referenced Domains
Outbound domains this page links to or loads resources from. Each links to its own security scan.
Safety FAQ
Common questions about this site, answered directly from the scan data above — so the answers always reflect the latest verdict on this page.
- Our automated security review marked billiontoone.com as suspicious. Several warning signs were detected; it may still turn out legitimate, but you should verify it through independent channels before trusting it with money or credentials.
- billiontoone.com currently scores 55/100 on our trust scale. We found enough warning signals to recommend caution. Verify the site through independent channels before entering credentials or money.
- Yes. billiontoone.com presents a valid TLSv1.3 certificate issued by Google Trust Services · WE1, expiring in 37 days. Note that SSL only encrypts the connection — it does not guarantee that the site itself is trustworthy.
- No. All 92 antivirus engines in our malware network report billiontoone.com as clean.
- No. billiontoone.com is not currently listed on the major browser blocklist feeds that modern browsers use.
- billiontoone.com resolves to an IP operated by Webflow, Inc in US (usage type: Content Delivery Network). Hosting location alone doesn't make a site good or bad, but unusual geography for a brand's claimed country is one of many signals we weigh.
- This is a permanent record of the scan run on June 18, 2026. The verdict and evidence above reflect that scan and do not change on their own. If circumstances around billiontoone.com have changed, MalwareTips staff can run a fresh scan, which re-runs every check from scratch and publishes an updated report.
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