PostHog
Small (~170)
Sierra
Large (~500)
Best For
PostHog
Best for: Self-directed engineers who want radical transparency, no meetings, and full ownership of their product area
Sierra
Best for: Builders who want to work with proven Salesforce and Google leadership on enterprise AI agents
Ratings
PostHogSierra
4.3
4.0
Overall
4.5
3.5
Work-Life Balance
4.4
4.1
Culture & Values
4.3
4.0
Comp & Benefits
4.1
3.8
Senior Mgmt
4.1
3.8
Career Opps
👍 86% Recommend
👤 90% CEO Approval (James Hawkins)
👍 80% Recommend
👤 84% CEO Approval (Bret Taylor)
Culture Values
PostHog only
🔓 Open Source🪟 Transparent📡 Async-First🌐 Remote-Friendly🤝 Flat Hierarchy🧩 Wears Many Hats
Sierra only
⚙️ Engineering-Driven🚀 Ship Fast & Iterate💎 Strong Comp & Equity🌱 Learning & Growth
Shared
None
Pros & Cons
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
Sierra
- Elite founders with proven track records
- Strong equity at $10B valuation
- In-person-first culture
- Competitive intensity may not suit everyone
Bottom Line
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.
Sierra
Choose Sierra if you want elite founders (Bret Taylor, Clay Bavor) and strong equity at a $10B enterprise AI company — but it's in-person-first and the competitive intensity won't suit everyone.
Open Roles
PostHog — 14 jobs
💻 Engineering
6
💼 Sales / GTM
3
📋 Product
1
Sierra — 134 jobs
💻 Engineering
42
💼 Sales / GTM
27
📋 Product
15
👤 HR / People
7
🎨 Design
5
⚖️ Legal
5
📣 Marketing
5
⚙️ Operations
5
📊 Data
2
💰 Finance
1
Summary
PostHog scores 4.3/5.0 on Glassdoor with a 4.5 work-life balance rating. Sierra scores 4.0/5.0 overall with a 3.5 WLB. That’s a 0.3-point gap on overall satisfaction.
On the hiring front, PostHog has 14 open roles and Sierra has 134 open roles.