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: Self-directed engineers who want radical transparency, no meetings, and full ownership of their product area
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 (James Hawkins)
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
Radically transparent open-source culture with 2-3 person autonomous teams, no deadlines, and a public handbook — ideal if you're self-motivated, tough if you need structure.
Open Roles
Mercury — 70 jobs
💻 Engineering
15
💼 Sales / GTM
13
👤 HR / People
4
📋 Product
4
🎨 Design
3
⚖️ Legal
3
⚙️ Operations
3
📊 Data
2
💰 Finance
2
📣 Marketing
2
🧠 ML / AI
1
🎧 Support
1
PostHog — 14 jobs
💻 Engineering
6
💼 Sales / GTM
3
📋 Product
1
Summary
Mercury scores 4.3/5.0 on Glassdoor with a 3.8 work-life balance rating. PostHog scores 4.3/5.0 overall with a 4.5 WLB. They’re tied on overall satisfaction.
Both companies share these culture values: Wears Many Hats. Mercury also emphasizes Direct Product Impact, Engineering-Driven, Ship Fast & Iterate, Learning & Growth, Strong Comp & Equity. PostHog also emphasizes Open Source, Transparent, Async-First, Remote-Friendly, Flat Hierarchy.
On the hiring front, Mercury has 70 open roles and PostHog has 14 open roles.