Helsing
Mid (~660)
Mercury
Large (~1,300)
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
Mercury
Best for: Engineers who want product ownership and fast growth building startup banking infrastructure
Ratings
HelsingMercury
4.0
4.3
Overall
3.6
3.8
Work-Life Balance
4.1
3.9
Culture & Values
4.0
4.0
Comp & Benefits
3.8
3.8
Senior Mgmt
3.8
3.9
Career Opps
👍 80% Recommend
👤 84% CEO Approval (Gundbert Scherf)
👍 79% Recommend
👤 85% CEO Approval (Immad Akhund)
Culture Values
Helsing only
No unique values
Mercury only
🧩 Wears Many Hats
Shared
⚙️ Engineering-Driven🚀 Ship Fast & Iterate🎯 Direct Product Impact💎 Strong Comp & Equity🌱 Learning & Growth
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
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
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.
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.
Open Roles
Helsing — 103 jobs
💻 Engineering
51
🧠 ML / AI
8
⚙️ Operations
4
📋 Product
4
💰 Finance
3
🎨 Design
2
📣 Marketing
2
👤 HR / People
1
💼 Sales / GTM
1
🎧 Support
1
Mercury — 55 jobs
💻 Engineering
13
💼 Sales / GTM
11
🎨 Design
3
⚖️ Legal
3
📊 Data
2
💰 Finance
2
👤 HR / People
2
📣 Marketing
2
📋 Product
2
🧠 ML / AI
1
⚙️ Operations
1
🎧 Support
1
Summary
Helsing scores 4.0/5.0 on Glassdoor with a 3.6 work-life balance rating. Mercury scores 4.3/5.0 overall with a 3.8 WLB. That’s a 0.3-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Ship Fast & Iterate, Direct Product Impact, Strong Comp & Equity, Learning & Growth. Mercury also emphasizes Wears Many Hats.
On the hiring front, Helsing has 103 open roles and Mercury has 55 open roles.