Mercury
Large (~1,300)
OpenAI
Large (~3,500)
Best For
Mercury
Best for: Engineers who want product ownership and fast growth building startup banking infrastructure
OpenAI
Best for: Professionals interested in OpenAI
Ratings
MercuryOpenAI
4.3
4.5
Overall
3.8
3.6
Work-Life Balance
3.9
4.6
Culture & Values
4.0
4.5
Comp & Benefits
3.8
4.3
Senior Mgmt
3.9
4.3
Career Opps
👍 79% Recommend
👤 85% CEO Approval (Immad Akhund)
👍 90% Recommend
👤 95% CEO Approval (CEO)
Culture Values
Mercury only
🧩 Wears Many Hats
OpenAI only
🤖 Ethical AI / Safety
Shared
🎯 Direct Product Impact⚙️ Engineering-Driven🚀 Ship Fast & Iterate🌱 Learning & Growth💎 Strong Comp & Equity
Pros & Cons
Mercury
- Strong talent density with smart, motivated teammates and genuine autonomy and ownership
- Great Place to Work certified — product-first mindset with meaningful scope for every engineer
- Still figuring out how to scale processes — expect some ambiguity and shifting priorities
- Work-life balance rated 3.8/5 — periods of higher intensity during rapid growth phases
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
Mercury
Choose Mercury if you want product ownership, fast growth, and to build banking infrastructure for startups — but expect growing pains and occasionally intense workloads.
OpenAI
OpenAI — check Glassdoor for detailed reviews.
Open Roles
Mercury — 48 jobs
💻 Engineering
9
💼 Sales / GTM
9
🎨 Design
4
⚖️ Legal
3
📊 Data
2
💰 Finance
2
👤 HR / People
2
📣 Marketing
2
🧠 ML / AI
2
⚙️ Operations
2
📋 Product
2
🎧 Support
1
OpenAI — 631 jobs
💻 Engineering
293
💼 Sales / GTM
48
📋 Product
35
🧠 ML / AI
32
📊 Data
28
📣 Marketing
23
⚙️ Operations
17
⚖️ Legal
14
💰 Finance
12
🎨 Design
11
👤 HR / People
7
🎧 Support
4