OpenAI
Large (~3,500)
Synthesia
Mid (~660)
Best For
OpenAI
Best for: Engineers who want to build frontier AI models at the company defining the industry, with elite compensation
Synthesia
Best for: Engineers who want to build cutting-edge generative AI video at a fast-scaling London unicorn with a genuinely low-ego culture
Ratings
OpenAISynthesia
4.5
4.4
Overall
3.6
4.2
Work-Life Balance
4.6
4.5
Culture & Values
4.5
4.4
Comp & Benefits
4.3
4.2
Senior Mgmt
4.3
4.2
Career Opps
👍 90% Recommend
👤 95% CEO Approval (Sam Altman)
👍 88% Recommend
👤 92% CEO Approval (Victor Riparbelli)
Culture Values
OpenAI only
🤖 Ethical AI / Safety💎 Strong Comp & Equity
Synthesia only
🤝 Flat Hierarchy🧩 Wears Many Hats
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate🌱 Learning & Growth🎯 Direct Product Impact
Pros & Cons
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
Synthesia
- Low-ego supportive culture with genuine trust and ownership
- Fast-paced growth with real opportunity to develop and lead
- R&D and Product teams feel intense pressure and WLB suffers
- Promotions rare internally — new roles favor external hires
Bottom Line
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.
Synthesia
High-growth AI company with strong culture ratings and real employee trust, though R&D teams feel the pace and promotions skew toward external hires.
Open Roles
OpenAI — 660 jobs
💻 Engineering
304
💼 Sales / GTM
58
📋 Product
33
🧠 ML / AI
32
📊 Data
28
📣 Marketing
27
⚙️ Operations
19
👤 HR / People
14
🎨 Design
12
⚖️ Legal
10
🎧 Support
4
💰 Finance
3
Synthesia — 71 jobs
💼 Sales / GTM
25
🎨 Design
9
💻 Engineering
9
🧠 ML / AI
5
📣 Marketing
3
🎧 Support
3
📊 Data
2
👤 HR / People
1
⚖️ Legal
1
⚙️ Operations
1
📋 Product
1
Summary
OpenAI scores 4.5/5.0 on Glassdoor with a 3.6 work-life balance rating. Synthesia scores 4.4/5.0 overall with a 4.2 WLB. That’s a 0.1-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Ship Fast & Iterate, Learning & Growth, Direct Product Impact. OpenAI also emphasizes Ethical AI / Safety, Strong Comp & Equity. Synthesia also emphasizes Flat Hierarchy, Wears Many Hats.
On the hiring front, OpenAI has 660 open roles and Synthesia has 71 open roles.