River AI
river.ai
Actively hiring
AI Development Tools
AI Chips & Accelerators
Foundation Models
As featured in
View 13 jobs
Follow
Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$1.1B
1 round on record
Latest round
$1.1B
Seed · Aug 2026 · 2 mo ago
Team
201-500
employees, estimated range
Hiring now
18
+4 posted in 30 days
Backers
2
General Catalyst, Cisco Investments
The money's age
Fresh money
2 months since the last round · and hiring
Momentum
54/100
hiring for its size, a new city, in the news, fresh money
Last sign of life
this month
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 0.83%
of 133.2M domains by links, Common Crawl
Hacker News stories
1
best: 3 points
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Seed | Aug 2026 | $1.1B | General Catalyst lead, AMP PBC lead | enidnews.com |
Registers and programsofficial lists and records that name the company
| Legal entity | River AI Inc. | its site |
Backed byfrom the funds' portfolios and accelerator catalogs
General Catalyst 
Cisco Investments Investors in similar startupsfunds that back the companies most like this one
backs Lightning AI, MatX
backs Thinking Machines Lab
backs Positron AI
backs Ollama
backs Lightning AI
Similar startupsby what they do, their industry and backers
Odyssey is a deep-tech artificial intelligence startup building multimodal "world models" for interactive 3D simulations, headquartered in…
Ollama is a software company that makes it easy to run open models and automate work with them while keeping data safe. It began as an…
MatX is a semiconductor startup based in Mountain View, California that designs high-throughput chips for training and serving large…
Extropic is building thermodynamic computing hardware that performs probabilistic sampling in physics rather than in software. Founded in…
Positron AI builds purpose-built inference servers for large language models, aiming for much higher energy efficiency than general-purpose…
Prime Intellect is an artificial intelligence infrastructure company headquartered in San Francisco, California, and founded in 2023. The…
How River AI hires
Truth index
C 67/100
Ghost roles
56%
Stale roles
0%
Reposted roles
0%
River AI scores C on the Alion truth index (A is best, E worst), measured over 18 open roles re-checked against its own hiring board: 56% look like ghost listings, 0% 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
Overview
River AI is an artificial intelligence company headquartered in Palo Alto, California, and founded in 2026 by xAI co-founder Igor Babuschkin. The company is building what it calls an open AI stack, spanning personal AI models, tooling for developers to train and serve their own models, and a custom system on chip with an onboard machine learning accelerator. It raised 1.1 billion dollars led by General Catalyst with strategic investment from NVIDIA and AMD Ventures.
News
AI訓練のRiver AIが11億ドル調達、Valar Atomicsは原子炉の量産へ
米River AIリバーAIは、米xAIの共同創業者であるイゴール・バブシュキン氏が率いる米国のAIスタートアップだ2026年8月11日、シード及びシリーズAで総額11億ドルを調達したと発表した
Read more
Report
Cannabis facility goes up in smoke near High River
Fire crews from several municipalities responded to a large structure fire at a cannabis facility in Aldersyde, Alta.
Read more
Report
We replaced our ledger with two functions
We rebuilt the system that tracks every dollar and bitcoin at River and swapped it in live with zero downtime.
Read more
Report
Brazil's President Lula hails oil discovery near Amazon river
Environmentalists have heavily criticised the exploratory drilling in the sea off the mouth of the Amazon.
Read more
Report
A cotton T-shirt takes roughly 2,700 litres of water to produce, about what one person drinks in two and a half years, and most of that water is pulled from irrigation-stressed river basins in Central and South Asia thousands of kilometres from where...
The water crisis hidden in your closet begins thousands of kilometres away, in drought-stricken river basins where cotton farmers drain aquifers to grow the shirt on your back.
Read more
Report
Romania shuts only nuclear plant as heat causes drop in Danube River level
The Cernavodă plant, which produces 20% of Romania's electricity, is not expected to be restarted within the next 10 days.
Read more
Report
1,1 mld USD dla River AI: Co oznacza rewolucja spersonalizowanego AI?
River AI pozyskuje 1,1 mld USD na spersonalizowane modele AI. Dowiedz się, co ten trend oznacza dla MŚP i widoczności w sieci.
Read more
Report
Show more news
Tech stack
Technologies named in job postings at River AI over the last 12 months, by layer, with the share of postings for each.
Technologies in use
67
Postings analysed
19
Stack modernity
81/100AI adopter
Languages
C++47%
Python42%
Rust21%
SystemVerilog16%
Frameworks & libraries
CUDA32%
PyTorch26%
Triton21%
PyTorch C++21%
Cloud & platforms
CUDA Toolkit32%
Cadence Protium11%
Synopsys HAPS11%
vLLM11%
AI & ML
LLM11%
PEFT11%
LoRA5%
Sign in to see how your skills match this stack
Sign In
Full River AI tech stack
67 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$420k
Typical range
$300k – $420k
Open positions
18
12
Jobs
Senior
58.3%
Staff
41.7%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Senior | 7 | $420k | $420k |
| Staff | 5 | $380k | $300k – $400k |
Highest paying role
Compiler Engineer, Hardware
$420k
Normalized to USD per year
All salaries at River AI
By role, level and city, against the market · 18 jobs with pay
Growth
Hiring Momentum
78/100
Scaling fast
Open positions
18
3 opened / 1 closed in 30 days
Median time-to-fill
13 days
faster than 64% of the market
ATS activity
Every ~3 hours
10/17/2026
Hiring Dynamics
+100%
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.
Backend
22% ▲
AI/ML
11% ▲
Data Science
11% ▲
Administrative
11% ▲
HR
11% ▲
Legal
11% ▲
Activity Timeline
New location: Austin
Oct 2026
Added IAM to stack
Oct 2026
Added AI Agents to stack
Sep 2026
Added Agentic Workflows to stack
Sep 2026
Added Machine Learning to stack
Sep 2026
Added TensorRT to stack
Sep 2026
Added TensorRT-LLM to stack
Sep 2026
Added Speculative Decoding to stack
Sep 2026
Added KV Cache to stack
Sep 2026
Added NCCL to stack
Sep 2026
Added LoRA to stack
Sep 2026
Added vLLM to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
3
Hiring now
3
Countries
1
Busiest office
Palo Alto
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
Palo Alto
United States
HQ
Palo Alto
18 open roles 7 posted in 90 days 67% engineering 200-500 est. staff $404k Avg Salary
hires for Backend, Data Science, Hardware
Austin
United States
Engineering / R&D
Austin
7 open roles 1 posted in 90 days 86% engineering 50-200 est. staff $420k Avg Salary
hires for Data Science, Hardware, Industrial Engineering
San Francisco
United States
2 open roles 3 posted in 90 days 10-50 est. staff $370k Avg Salary
hires for Legal, Operations
Jobs
$200k – $420k per year • In office • 5+ years exp • Bachelor's Degree • Austin
Python
C++
SystemVerilog
AI Agents
Pre-training
Agentic Workflows
DevOps
CI/CD
Chips/EDA
UVM
Synopsys ZeBu
Cadence Palladium
Synopsys HAPS
Cadence Protium
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Fine-tuning
RLHF
Reinforcement Learning
JAX
Multimodal AI
Diffusion Models
PEFT
Transformers
PyTorch
Pre-training
Edge AI
Machine Learning
Apply
$200k – $420k per year • In office • 5+ years exp • Bachelor's Degree • Palo Alto • Austin
Python
C++
SystemVerilog
Pre-training
Chips/EDA
Synopsys PrimeTime
Synopsys Fusion Compiler
Synopsys Verdi
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Python
Rust
C++
PyTorch C++
AI/ML
LoRA
CUDA Toolkit
Fine-tuning
Reinforcement Learning
JAX
PEFT
PyTorch
Mixture of Experts
CUDA
Pre-training
NCCL
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Python
C++
PyTorch C++
AI/ML
vLLM
CUDA Toolkit
Fine-tuning
SGLang
Accelerate
PyTorch
Mixture of Experts
CUDA
Triton
Pre-training
CUTLASS
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Python
Rust
C++
vLLM
CUDA Toolkit
Reinforcement Learning
SGLang
TensorRT
TensorRT-LLM
Mixture of Experts
CUDA
Pre-training
Speculative Decoding
KV Cache
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Rust
C++
PyTorch C++
AI/ML
JAX
PyTorch
Pre-training
InfiniBand
Apply
$200k – $420k per year • In office • Bachelor's Degree • Palo Alto
Python
JavaScript
Rust
TypeScript
Function Calling
LLM
Pre-training
Structured Outputs
Tool Use
Frontend
React.js
Mobile
React Native
DevOps
Terraform
CI/CD
Kubernetes
Apply
$200k – $420k per year • In office • 5+ years exp • Bachelor's Degree • Palo Alto • Austin
C
C++
SystemC
GCC
C++
LLVM
AI/ML
CUDA Toolkit
CUDA
Triton
Pre-training
XLA
DevOps
QEMU
Apply
$200k – $300k per year • In office • Bachelor's Degree • Palo Alto
Reinforcement Learning
Function Calling
LLM
SFT
Post-training
Pre-training
Tool Use
Apply
$200k – $420k per year • In office • 5+ years exp • Bachelor's Degree • Palo Alto • Austin
C++
CUDA Toolkit
CUDA
Triton
Pre-training
CUTLASS
Apply
$200k – $420k per year • In office • 5+ years exp • Bachelor's Degree • Palo Alto • Austin
Python
SystemVerilog
Perl
Pre-training
DevOps
CI/CD
Chips/EDA
UVM
Formal Verification
Synopsys VC Formal
Synopsys ZeBu
Cadence Palladium
Synopsys HAPS
Cadence Protium
Apply
Financials
Total raised
$1.1B
Latest round
Seed
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Seed | 2026 | $1.1B | Details |