Cerebras Systems
Large (~700)
Mercor
Small (~200)
Best For
Cerebras Systems
Best for: Hardware and systems engineers who want to build the world's fastest AI chip at a newly public company
Mercor
Best for: Engineers who want to build AI hiring infrastructure at a $10B rocketship with extreme ownership and MIT-founder energy
Ratings
Cerebras SystemsMercor
4.0
3.9
Overall
3.8
3.9
Work-Life Balance
4.1
3.6
Culture & Values
4.0
4.0
Comp & Benefits
3.8
3.5
Senior Mgmt
3.8
3.7
Career Opps
👍 80% Recommend
👤 84% CEO Approval (Andrew Feldman)
👍 74% Recommend
👤 82% CEO Approval (Brendan Foody)
Culture Values
Cerebras Systems only
🌱 Learning & Growth🎯 Direct Product Impact
Mercor only
🚀 Ship Fast & Iterate🤝 Flat Hierarchy💎 Strong Comp & Equity
Shared
⚙️ Engineering-Driven
Pros & Cons
Cerebras Systems
- Collaborative culture with strong mentorship
- Autonomy in small self-managed teams
- Top-down decisions with aggressive timelines
- Recent layoffs and workload concerns
Mercor
- Massive impact at an AI company growing at breakneck speed
- Top-tier compensation with strong equity at $10B valuation
- Intense 9/9/6 work schedule — long hours are the norm
- Work-life balance is a real sacrifice at this stage
Bottom Line
Cerebras Systems
Choose Cerebras if you want to work on wafer-scale AI chips with collaborative mentorship and autonomy — but expect aggressive timelines driven from the top and recent organizational instability post-IPO.
Mercor
Choose Mercor if you want outsized impact on AI-era hiring at a tiny, fast-moving team — but the 9/9/6 schedule is real, and work-life balance is genuinely sacrificed for speed.
Open Roles
Cerebras Systems — 93 jobs
💻 Engineering
58
🧠 ML / AI
10
💰 Finance
5
📋 Product
5
📣 Marketing
2
⚙️ Operations
2
🎨 Design
1
⚖️ Legal
1
Mercor — 49 jobs
💻 Engineering
20
🧠 ML / AI
6
💼 Sales / GTM
5
👤 HR / People
3
📊 Data
2
📣 Marketing
2
📋 Product
2
🎨 Design
1
⚙️ Operations
1
Summary
Cerebras Systems scores 4.0/5.0 on Glassdoor with a 3.8 work-life balance rating. Mercor scores 3.9/5.0 overall with a 3.9 WLB. That’s a 0.1-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven. Cerebras Systems also emphasizes Learning & Growth, Direct Product Impact. Mercor also emphasizes Ship Fast & Iterate, Flat Hierarchy, Strong Comp & Equity.
On the hiring front, Cerebras Systems has 93 open roles and Mercor has 49 open roles.