From AI labs to developer tools - who’s scaling faster than anyone imagined?
🌎 Why “fastest-growing” matters more than ever
2025 has been a wild year for startups.
Every week, another company seems to announce $100 M ARR, $2 B valuation, or 100%+ growth.
But “fastest-growing” isn’t just about hype - it signals where the future is moving.
In SaaS and AI, growth velocity has become the new moat. Investors, founders, and even job-seekers are chasing that momentum.
Let’s break down the 10 companies growing at breakneck speed this year - what they do, why they’re exploding, and what it means for you.
1. Anysphere (Cursor AI)
AI-powered coding assistant (Cursor) loved by developers
Grew from ~$100 M to ~$500 M ARR in 5 months
Valued near $9.9 B with massive user adoption
TechCrunch called it “the fastest-growing SaaS product ever”
2. Lovable
Sweden’s “AI website builder” that went viral overnight
From launch → $17 M ARR in 3 months → $100 M ARR in 8 months
Described as “the fastest-growing software startup ever”
Combines simplicity + AI creativity = unstoppable formula
3. Mercor AI
AI recruiting marketplace founded by 21-year-olds
Jumped from ~$1 M to ~$100 M ARR in under a year
Valued at $2 B with Series B round of $100 M
Connects top AI engineers with labs like OpenAI, Anthropic, and more
4. Deel
Remote hiring & payroll platform used in 150+ countries
• Crossed $1 B run-rate with 75 % YoY growth
• Turning “borderless hiring” into the default
5. Cribl.io
Simplifies observability data pipelines for enterprises
Hit $200 M ARR, 70 %+ YoY growth
Serves massive enterprise clients — “plumbing” for modern data
6. VAST Data
AI-optimized data infrastructure
Claimed $200 M+ ARR, strong enterprise expansion
Partnering with NVIDIA & Dell for next-gen AI storage
7. Abacus AI
Offers full-stack AI model deployment for enterprises
Cited as “exploding” in growth rankings
Riding the wave of enterprise GenAI adoption
8. Supabase
Open-source alternative to Firebase
Explosive developer adoption → tens of thousands of active projects
Developer-first community making backend development cool again 🔗 Read more
9. Linktree
50 M+ creators using it as the “home link” for all socials
Now expanding into analytics & monetization
Proof that even “simple ideas” can scale into global brands
💼 10. Remote.com
Simplifies global hiring, payroll, and compliance
Competing head-to-head with Deel in the remote-work revolution
Fastest-growing global HR SaaS of 2025 🔗 Read more
📈 Patterns behind the winners
💬 Final Thought
“Fastest-growing” isn’t about being loud — it’s about being loved, useful, and built for the moment.
Each of these companies spotted an urgent shift — and sprinted toward it before anyone else.
So, if you’re building something new… ask yourself: What’s the one pain people didn’t know they had until this year?
Because that’s where the next Lovable, Mercor, or Anysphere will rise.
What You might have Spotted ?
Out of the top 10, 3–4 companies - Mercor, Deel, Remote.com, and arguably even Linktree (influencer career enablement) - fall squarely under the HR / WorkTech / Talent Infrastructure umbrella.
That’s roughly 40% of the list, which is striking given that the remaining ones are either AI tools (Anysphere, Abacus AI, Supabase) or infrastructure (Cribl, VAST).
This shows a clear pattern:
AI isn’t just changing how we work - it’s completely reshaping where talent flows and how companies are built.
⸻
🧩 Why this matters
In 2025, “HR tech” has quietly become the new AI gold rush — but with a twist: it’s not traditional HR software anymore.
It’s AI-powered work platforms.
These startups are:
• Turning talent into a global market (Mercor, Deel, Remote.com)
• Matching people to projects via AI instead of resumes (Mercor)
• Reimagining compliance, payroll, and benefits across borders (Deel, Remote)
• Empowering creators and freelancers to own their brand identities (Linktree)
In short - AI has made HR sexy again
✍️ Author
Akriti Lal - Microsoft Certified Trainer & AI Educator
Founder, Instrovate Technologies
💡 Helping professionals get #AIReady - one course, one insight at a time.