Labelbox
Medium (~350)
Mercor
Small (~200)
Best For
Labelbox
Best for: ML infrastructure engineers building data labeling and training platforms for frontier AI labs and enterprises
Mercor
Best for: Engineers who want to build AI hiring infrastructure at a $10B rocketship with extreme ownership and MIT-founder energy
Ratings
LabelboxMercor
3.8
3.9
Overall
3.6
3.9
Work-Life Balance
3.8
3.6
Culture & Values
3.6
4.0
Comp & Benefits
3.5
3.5
Senior Mgmt
3.6
3.7
Career Opps
👍 72% Recommend
👤 78% CEO Approval (Manu Sharma)
👍 74% Recommend
👤 82% CEO Approval (Brendan Foody)
Culture Values
Labelbox only
🌈 Diverse & Inclusive
Mercor only
🤝 Flat Hierarchy
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate💎 Strong Comp & Equity
Pros & Cons
Labelbox
- Competitive compensation and equity
- Working with top AI labs as customers
- Rapid growth creates organizational churn
- Some teams move faster than others
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
Labelbox
Choose Labelbox if you want to work on the data side of AI — labeling, evaluation, and training infrastructure used by frontier AI teams — with moderate SF-based intensity.
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
Labelbox — 9 jobs
💻 Engineering
3
🧠 ML / AI
3
📊 Data
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
Labelbox scores 3.8/5.0 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. Labelbox also emphasizes Diverse & Inclusive. Mercor also emphasizes Flat Hierarchy.
On the hiring front, Labelbox has 9 open roles and Mercor has 49 open roles.