Lambda
Mid (~500)
OpenAI
Large (~3,500)
Best For
Lambda
Best for: Professionals interested in Lambda
OpenAI
Best for: Engineers who want to build frontier AI models at the company defining the industry, with elite compensation
Ratings
LambdaOpenAI
3.6
4.5
Overall
3.7
3.6
Work-Life Balance
3.7
4.6
Culture & Values
3.6
4.5
Comp & Benefits
3.4
4.3
Senior Mgmt
3.4
4.3
Career Opps
👍 72% Recommend
👤 76% CEO Approval (CEO)
👍 90% Recommend
👤 95% CEO Approval (Sam Altman)
Culture Values
Lambda only
No unique values
OpenAI only
🌱 Learning & Growth
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate💎 Strong Comp & Equity🎯 Direct Product Impact
Pros & Cons
Lambda
- Building the GPU cloud that powers the world’s top AI labs — genuinely impactful infrastructure
- Smart engineering team with strong technical culture and good WLB on most teams
- Management style described as top-down; strategy clarity could be better
- Internal politics and coordination overhead slow things down for some teams
OpenAI
- Cutting-edge frontier AI research with world-class colleagues
- Elite compensation — top-tier TC and equity packages
- High-intensity environment — long hours and intense pace are the norm
- Internal politics and rapid org changes as the company scales
Bottom Line
Lambda
Lambda — check Glassdoor for detailed reviews.
OpenAI
High-intensity, mission-driven culture with world-class colleagues and top-tier comp — but expect long hours, rapid org changes, and internal politics as the company scales.
Open Roles
Lambda — 32 jobs
💻 Engineering
14
💰 Finance
6
📋 Product
4
👤 HR / People
2
⚖️ Legal
1
OpenAI — 655 jobs
💻 Engineering
317
💼 Sales / GTM
57
📋 Product
30
📊 Data
28
🧠 ML / AI
28
📣 Marketing
24
⚙️ Operations
17
⚖️ Legal
13
🎨 Design
10
👤 HR / People
9
💰 Finance
7
🎧 Support
4
Summary
Lambda scores 3.6/5.0 on Glassdoor with a 3.7 work-life balance rating. OpenAI scores 4.5/5.0 overall with a 3.6 WLB. That’s a 0.9-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Ship Fast & Iterate, Strong Comp & Equity, Direct Product Impact. OpenAI also emphasizes Learning & Growth.
On the hiring front, Lambda has 32 open roles and OpenAI has 655 open roles.