Fireworks AI
Small (~100)
PostHog
Small (~170)
Best For
Fireworks AI
Best for: Engineers who want to work with ex-Meta AI infrastructure engineers on LLM inference
PostHog
Best for: Professionals interested in PostHog
Ratings
Fireworks AIPostHog
4.2
4.3
Overall
3.3
4.5
Work-Life Balance
4.3
4.4
Culture & Values
4.2
4.3
Comp & Benefits
4.2
4.1
Senior Mgmt
4.0
4.1
Career Opps
👍 86% Recommend
👤 90% CEO Approval (CEO)
Culture Values
Fireworks AI only
⚙️ Engineering-Driven🚀 Ship Fast & Iterate🎧 Deep Work / Low Meetings🌱 Learning & Growth
PostHog only
🔓 Open Source🪟 Transparent📡 Async-First🌐 Remote-Friendly🤝 Flat Hierarchy
Shared
🧩 Wears Many Hats
Pros & Cons
Fireworks AI
- World-class team of ex-Meta AI infrastructure engineers — technically very strong peers
- Working on LLM inference optimization which is one of the hottest areas in AI infrastructure
- Early-stage startup intensity with long hours expected and high performance bar
- Small team and rapidly evolving product means less structure, process, and career laddering
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
Fireworks AI
Choose Fireworks AI if you want to work with ex-Meta AI infrastructure engineers on cutting-edge LLM inference — but expect early-stage startup intensity and limited structure.
PostHog
PostHog — check Glassdoor for detailed reviews.
Open Roles
Fireworks AI — 28 jobs
💻 Engineering
9
💼 Sales / GTM
4
⚙️ Operations
2
👤 HR / People
1
⚖️ Legal
1
📣 Marketing
1
🧠 ML / AI
1
📋 Product
1
PostHog — 15 jobs
💻 Engineering
8
💼 Sales / GTM
2
🧠 ML / AI
1
📋 Product
1
Summary
Fireworks AI scores 4.2/5.0 on Glassdoor with a 3.3 work-life balance rating. PostHog scores 4.3/5.0 overall with a 4.5 WLB. That’s a 0.1-point gap on overall satisfaction.
Both companies share these culture values: Wears Many Hats. Fireworks AI also emphasizes Engineering-Driven, Ship Fast & Iterate, Deep Work / Low Meetings, Learning & Growth. PostHog also emphasizes Open Source, Transparent, Async-First, Remote-Friendly, Flat Hierarchy.
On the hiring front, Fireworks AI has 28 open roles and PostHog has 15 open roles.