Valthos
valthos.com
Actively hiring
AI for Science
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Overview
Connections
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$30M
1 round on record
Latest round
$30M
Seed · Oct 2025 · 12 mo ago
Team
51-200
employees, estimated range
Hiring now
8
open roles
Backers
1
Lux Capital
The money's age
Due for its next round
12 months since the last round · hiring slowed
Momentum
0/100
no fresh signals
Last sign of life
1 mo ago
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Tractionpublic signals, read monthly
Web presence
top 6%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Seed | Oct 2025 | $30M | — | PYMNTS.com |
Registers and programsofficial lists and records that name the company
| Legal entity | Valthos Inc. | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Kathleen McMahonExecutive Officer, DirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
Investors in similar startupsfunds that back the companies most like this one
Similar startupsby what they do, their industry and backers
Engineering serendipity Arcadia was founded in 2021 with a long time horizon to rethink the entire research cycle. We see a unique…
Kinetic Systems is an applied AI research lab focused on improving frontier models to solve economically meaningful healthcare tasks.
Phylo is an applied research lab dedicated to studying agentic intelligence to accelerate discoveries for every biomedical scientist.
The Biological Computing Co. (TBC) turns discoveries from real neurons into software that makes AI faster and cheaper, without retraining.
Blazar develops software and methods to help biomedical and translational R&D teams preserve interpretability, traceability, and continuity…
ESM3. Enabling scientists to understand, imagine, and create proteins.
How Valthos hires
Truth index
B 75/100
Ghost roles
0%
Stale roles
100%
Reposted roles
0%
Valthos scores B on the Alion truth index (A is best, E worst), measured over 8 open roles re-checked against its own hiring board: 0% look like ghost listings, 100% have gone stale and 0% are the same role posted again. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
Lux CapitalVia a fund
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
News
Valthos Raises $30M from OpenAI, Lux Capital, Founders Fund to Build Next-Generation Biodefense
/PRNewswire/ -- Valthos announced $30 million in seed financing led by OpenAI Startup Fund, Lux Capital, and Founders Fund to support the development of...
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Report
Valthos: $30 Million Raised For Biotechnology Platform
Valthos, a newly launched biotech company, announced recently that it has emerged to safeguard humanity from the accelerating threat of programmable biology. In a company blog post, Valthos stated that as artificial intelligence continues to advance, life
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Report
OpenAI-Backed Valthos Raises $30 Million to Combat AI-Enabled Biological Threats
Valthos said that it has raised $30 million to build
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Report
OpenAI funds biosecurity startup 'Valthos
In order to counter the most severe potential dangers of artificial intelligence, a new startup called "Valthos" has emerged with $30 million in backing from OpenAI, Founders Fund, and Lux Capital. The company envisions...
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Report
Tech stack
Technologies named in job postings at Valthos over the last 12 months, by layer, with the share of postings for each.
Technologies in use
6
Postings analysed
3
Stack modernity
85/100
Languages
Python
TypeScript
JavaScript
Frameworks & libraries
React.js
Cloud & platforms
Figma
Practices & domains
Machine Learning
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People
Kathleen McMahon
Executive Officer, Director
Tess Van Stekelenburg
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Growth
Hiring Momentum
31/100
Slowing
Open positions
8
0 opened / 0 closed in 30 days
ATS activity
Every ~4 hours
Today
Hiring Dynamics
0%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
AI/ML
38% ▼
Backend
25% ▼
Operations
13% ▼
Field & Service
13% ▼
Solutions
13% ▼
Activity Timeline
Added Machine Learning to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
2
Hiring now
2
Countries
1
Busiest office
New York
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Headquarters
Builds here
Office with open vacancies
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New York
United States
HQ
8 open roles 63% engineering 50-200 est. staff
hires for AI/ML, Backend, Operations
San Francisco
United States
Engineering / R&D
6 open roles 83% engineering 10-50 est. staff
hires for AI/ML, Backend, Solutions
Jobs
≈ $169k – $315k per year (Estimated) · In office · Full-Time · New York · San Francisco
JavaScript
TypeScript
React.js
Design
Figma
Apply
≈ $173k – $344k per year (Estimated) · In office · Full-Time · New York · San Francisco
Python
Machine Learning
Apply
≈ $137k – $264k per year (Estimated) · In office · Full-Time · New York · San Francisco
Python
TypeScript
Apply
≈ $169k – $316k per year (Estimated) · In office · Full-Time · New York · San Francisco
Rest API
AWS
Docker
Kubernetes
Apply
≈ $180k – $358k per year (Estimated) · In office · Full-Time · New York · San Francisco
Python
PyTorch
Time Series
Post-training
DevOps
AWS
Apply
≈ $172k – $342k per year (Estimated) · In office · Full-Time · New York · San Francisco
Python
Machine Learning
DevOps
AWS
Apply
Financials
Total raised
$30M
Latest round
Seed
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Seed | 2025 | $30M | Details |