Sierra
Large (~500)
Together AI
Small (~150)
Best For
Sierra
Best for: Builders who want to work with proven Salesforce and Google leadership on enterprise AI agents
Together AI
Best for: Open-source AI infrastructure builders who want research-level impact at a startup
Ratings
SierraTogether AI
4.0
4.1
Overall
3.5
3.8
Work-Life Balance
4.1
4.3
Culture & Values
4.0
4.0
Comp & Benefits
3.8
4.0
Senior Mgmt
3.8
3.8
Career Opps
👍 80% Recommend
👤 84% CEO Approval (Bret Taylor)
👍 82% Recommend
👤 85% CEO Approval (Vipul Ved Prakash)
Culture Values
Sierra only
🚀 Ship Fast & Iterate💎 Strong Comp & Equity
Together AI only
🔓 Open Source🤝 Flat Hierarchy🧩 Wears Many Hats
Shared
⚙️ Engineering-Driven🌱 Learning & Growth
Pros & Cons
Sierra
- Elite founders with proven track records
- Strong equity at $10B valuation
- In-person-first culture
- Competitive intensity may not suit everyone
Together AI
- Open-source AI infrastructure — real mission alignment, not just marketing
- Small team with outsized research output; your work has direct impact
- Early-stage means wearing many hats constantly — not for specialists
- Limited career ladder; growth paths are still being defined
Bottom Line
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.
Together AI
Choose Together AI if you want real open-source mission with outsized research output — but expect to wear many hats.
Open Roles
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
Together AI — 49 jobs
💻 Engineering
19
🧠 ML / AI
9
📊 Data
4
📋 Product
3
🎧 Support
3
📣 Marketing
2
💼 Sales / GTM
2
🎨 Design
1
⚖️ Legal
1
⚙️ Operations
1
Summary
Sierra scores 4.0/5.0 on Glassdoor with a 3.5 work-life balance rating. Together AI scores 4.1/5.0 overall with a 3.8 WLB. That’s a 0.1-point gap on overall satisfaction.
Both companies share these culture values: Engineering-Driven, Learning & Growth. Sierra also emphasizes Ship Fast & Iterate, Strong Comp & Equity. Together AI also emphasizes Open Source, Flat Hierarchy, Wears Many Hats.
On the hiring front, Sierra has 134 open roles and Together AI has 49 open roles.