Helsing
Mid (~660)
Mercor
Small (~200)
Best For
Helsing
Best for: AI/ML engineers motivated by national security and defense who want to apply frontier AI to high-stakes real-world problems in a mission-driven team
Mercor
Best for: Engineers who want to build AI hiring infrastructure at a $10B rocketship with extreme ownership and MIT-founder energy
Ratings
HelsingMercor
4.0
3.9
Overall
3.6
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 (Gundbert Scherf)
👍 74% Recommend
👤 82% CEO Approval (Brendan Foody)
Culture Values
Helsing only
🎯 Direct Product Impact🌱 Learning & Growth
Mercor only
🤝 Flat Hierarchy
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate💎 Strong Comp & Equity
Pros & Cons
Helsing
- Highest talent density of any tech company — world-class AI and engineering leadership
- Extremely important mission with rewarding impact and competitive salary
- Ridiculous expectations of work hours — high salaries do not mean constant overtime
- Some management not experienced enough to lead; lacking in performance feedback
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
Helsing
Strong engineering culture with a clear mission — but that mission (AI for defense) is not for everyone. Research the ethics carefully before applying; those aligned will find unusually meaningful work.
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
Helsing — 103 jobs
💻 Engineering
53
🧠 ML / AI
8
💰 Finance
3
⚙️ Operations
3
📋 Product
3
👤 HR / People
2
📣 Marketing
2
🎨 Design
1
⚖️ Legal
1
💼 Sales / GTM
1
🎧 Support
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
Helsing scores 4.0/5.0 on Glassdoor with a 3.6 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, Ship Fast & Iterate, Strong Comp & Equity. Helsing also emphasizes Direct Product Impact, Learning & Growth. Mercor also emphasizes Flat Hierarchy.
On the hiring front, Helsing has 103 open roles and Mercor has 49 open roles.