Glassdoor ratings are the closest thing we have to a public, crowdsourced performance review of a company's culture. They're imperfect — small sample sizes can skew results, disgruntled ex-employees can drag scores down, and some companies actively encourage positive reviews. But across dozens or hundreds of reviews, patterns emerge that are hard to fake.
We collected overall Glassdoor ratings for all 29 AI and tech companies profiled in our Culture Directory and ranked them from highest to lowest. These are the companies that are building the future of AI, developer tools, and infrastructure — and we wanted to know: which ones do employees actually recommend?
The spread is dramatic. A 2.1-point gap separates the top-rated company from the bottom — the difference between a workplace where employees are genuine evangelists and one where the reviews read like warnings.
The Full Rankings
Below are all 29 companies sorted by overall Glassdoor rating. The colored bars give you an at-a-glance read: green for 4.0 and above, amber for 3.5–3.9, and red for below 3.5.
| # | Company | Glassdoor Rating | WLB | Size |
|---|---|---|---|---|
| 1 | Vast AI | 5.0 |
4.5 | Small (~30) |
| 2 | Perplexity AI | 4.7 |
3.3 | Mid (~500) |
| 3 | Linear | 4.6 |
4.4 | Small (~80) |
| 4 | LangChain | 4.6 |
4.0 | Small (~230) |
| 5 | Runway | 4.5 |
4.0 | Mid (~420) |
| 6 | OpenAI | 4.5 |
3.6 | Large (~3,500) |
| 7 | Anthropic | 4.4 |
3.7 | Mid (~1,500) |
| 8 | Notion | 4.4 |
4.2 | Mid (~800) |
| 9 | HubSpot | 4.3 |
4.1 | Large (~8,000) |
| 10 | Weaviate | 4.3 |
4.2 | Small (~110) |
| 11 | ElevenLabs | 4.2 |
3.6 | Mid (~600) |
| 12 | Pinecone | 4.2 |
4.3 | Small (~130) |
| 13 | Ramp | 4.2 |
3.5 | Large (~1,000+) |
| 14 | Google DeepMind | 4.2 |
4.0 | Large (~7,000) |
| 15 | Databricks | 4.1 |
3.9 | Large (~7,000) |
| 16 | Together AI | 4.1 |
3.8 | Small (~150) |
| 17 | Airbnb | 4.1 |
4.0 | Large (~7,300) |
| 18 | Mistral AI | 4.0 |
3.6 | Small (~100) |
| 19 | Stripe | 4.0 |
3.6 | Large (~8,000) |
| 20 | Cursor | 4.0 |
3.5 | Small (~50) |
| 21 | Apollo.io | 4.0 |
3.6 | Large (~800) |
| 22 | Modal | 4.0 |
3.8 | Small (~110) |
| 23 | Replit | 4.0 |
3.9 | Small (~200) |
| 24 | Vercel | 3.9 |
3.4 | Mid (~600) |
| 25 | Hugging Face | 3.8 |
4.1 | Small (~400) |
| 26 | Figma | 3.7 |
3.1 | Large (~2,800) |
| 27 | CoreWeave | 3.6 |
3.2 | Large (~1,800) |
| 28 | Scale AI | 3.5 |
2.7 | Large (~1,200) |
| 29 | Cohere | 2.9 |
3.5 | Small (~500) |
Several patterns stand out. The top of the table is dominated by small and mid-size companies — teams under 500 people where culture is still shaped by founders rather than HR departments. But there are notable exceptions: OpenAI at 4.5 with ~3,500 employees and HubSpot at 4.3 with ~8,000 prove that scale doesn't have to kill employee satisfaction.
Perhaps the most interesting tension is between Glassdoor rating and work-life balance. Perplexity AI has the second-highest overall rating (4.7) but one of the lowest WLB scores (3.3). Employees love the mission, the team, and the product — they're just working extremely hard for it. Conversely, Hugging Face has a relatively modest 3.8 Glassdoor rating but a strong 4.1 WLB score, suggesting that balanced hours alone don't make employees rave about their employer.
The Top 5: Why Employees Love Them
The top five companies represent a mix of company sizes, business models, and AI sub-domains. What they share is something harder to quantify: a sense that employees genuinely believe in the mission and feel respected by leadership. Let's examine each one.
1. Vast AI
Vast AI is a tiny GPU marketplace startup with ~30 employees, and it holds the only perfect 5.0 rating in our entire database. At this size, a perfect score should be taken with a grain of salt — a handful of enthusiastic early employees can skew the number. But combined with the highest WLB score (4.5) and the energy around AI compute infrastructure, the signal is clear: this is a team that's excited about what they're building and feels well-treated while doing it. The trade-off is the typical early-stage reality: processes are still being invented, and the company's long-term trajectory is less certain than established players.
2. Perplexity AI
Perplexity AI is the most fascinating case in our dataset. At 4.7, it has the highest Glassdoor rating of any company with more than 100 employees — yet its work-life balance score of 3.3 lands it near the bottom of our WLB rankings. This is a company where people work incredibly hard and love every minute of it. With ~500 employees, real revenue, and a product that's genuinely challenging Google Search, Perplexity has the kind of product-market fit energy that makes 60-hour weeks feel purposeful rather than punishing. But make no mistake: the intensity is real. If you need firm boundaries between work and life, this isn't your company. If you want to be part of something that feels historic, it might be exactly right.
3. Linear
Linear is the company that proves you don't have to sacrifice work-life balance to earn a stellar Glassdoor rating. With a 4.6 overall rating and a 4.4 WLB score, it sits near the top of both rankings. The secret is a deeply intentional deep work culture: no standups, minimal meetings, asynchronous communication by default. At ~80 employees, Linear is highly selective about who joins, which means every person has outsized impact on the product. The downside is the flip side of that selectivity — there simply aren't many roles open, and when they do hire, the bar is exceptionally high.
4. LangChain
LangChain is the company behind the most widely-used LLM application framework. At ~230 employees and a 4.6 Glassdoor rating, it's one of the best-rated companies at its size in AI. The open-source DNA runs deep: your work ships to a community of millions of developers, and the feedback loop is immediate and energizing. With 84 open roles, the company is actively scaling. The honest caveat: LangChain is still very early-stage, which means limited formal structure, evolving processes, and the kind of ambiguity that excites some people and frustrates others.
5. Runway
Runway is the company at the forefront of AI-generated video and creative tools. At ~420 employees and a 4.5 Glassdoor rating, it shares the #5 spot with OpenAI — but with a notably better WLB score (4.0 vs 3.6). Working on AI video generation in 2026 puts you at one of the most exciting intersections of technology and creativity. The team culture leans heavily into creative exploration and product taste. The main challenge is the one faced by every fast-growing startup in a category that didn't exist three years ago: growing pains are real as the company scales from startup scrappiness to mid-size operational maturity.
Key Takeaways: What the Best-Rated Companies Share
Looking across the top-rated companies, several themes emerge that separate the leaders from the rest of the pack.
- Mission clarity matters more than perks. The highest-rated companies — Vast AI, Perplexity, Runway — aren't necessarily the ones with the best compensation or the most generous PTO. They're the ones where employees feel connected to a meaningful mission. "We're building something that matters" shows up as a through-line in positive reviews across all top performers.
- High ratings don't require high WLB. Perplexity (4.7 GD, 3.3 WLB) and OpenAI (4.5 GD, 3.6 WLB) prove that employees can rate a company highly even when work-life balance is mediocre — if the work itself is exciting enough. But the opposite is not true: no company in our database has a high WLB score and a low overall rating.
- Small teams have an unfair advantage. Companies under 200 employees dominate the top 10 (Vast AI, Linear, LangChain, Weaviate, Pinecone). At this size, culture is shaped by daily interactions with founders and leaders, not by HR policies. But this advantage can vanish quickly during hypergrowth if culture isn't deliberately maintained.
- Transparency and trust beat process. Across the top performers, "transparent leadership" and "high autonomy" are the most common praise themes. Employees want to know why decisions are made and to be trusted to execute without micromanagement. The companies that get this right tend to score well across both Glassdoor rating and WLB.
At the bottom of the rankings, Cohere (2.9) and Scale AI (3.5) share a common thread: reviews cite organizational instability, shifting priorities, and a gap between the company's public narrative and day-to-day reality. These are fixable problems, and both companies have the funding and talent to course-correct. But for now, the Glassdoor data sends a clear signal that prospective employees should ask pointed questions during interviews.
The median Glassdoor rating across our 29 companies is 4.1 — meaningfully higher than the Glassdoor average across all employers (~3.5). This suggests that the AI and tech sector, despite its well-documented intensity, is producing workplaces that employees genuinely enjoy. The talent war for AI engineers is fierce enough that companies can't afford to be mediocre employers for long. The data supports what many in the industry already sense: the best AI companies aren't just building great technology. They're building great places to work.
If you're evaluating your next move, don't stop at the overall rating. Use our comparison tool to see how any two companies stack up on culture values, WLB, compensation signals, and employee reviews. And explore individual company culture profiles for the full picture beyond the numbers.
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