Mercury
Large (~1,300)
PostHog
Small (~170)
Best For
Mercury
Best for: Engineers who want product ownership and fast growth building startup banking infrastructure
PostHog
Best for: Professionals interested in PostHog
Ratings
MercuryPostHog
4.3
4.3
Overall
3.8
4.5
Work-Life Balance
3.9
4.4
Culture & Values
4.0
4.3
Comp & Benefits
3.8
4.1
Senior Mgmt
3.9
4.1
Career Opps
👍 79% Recommend
👤 85% CEO Approval (Immad Akhund)
👍 86% Recommend
👤 90% CEO Approval (CEO)
Culture Values
Mercury only
🎯 Direct Product Impact⚙️ Engineering-Driven🚀 Ship Fast & Iterate🌱 Learning & Growth💎 Strong Comp & Equity
PostHog only
🔓 Open Source🪟 Transparent📡 Async-First🌐 Remote-Friendly🤝 Flat Hierarchy
Shared
🧩 Wears Many Hats
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
PostHog
- Extreme transparency — public handbook, open-source everything, radical autonomy
- Generous compensation with competitive pay, equity, and home office budget
- Small team means limited career progression paths
- Top-down decision-making can sometimes override team input
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.
PostHog
PostHog — 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
PostHog — 17 jobs
💻 Engineering
9
💼 Sales / GTM
3
🧠 ML / AI
1
📋 Product
1