Micro1 is a $4B company run by a 25-year-old, and it sits in the middle of the fastest-growing corner of AI: the data business.
I sat down with @aliansarinik, micro1's CEO, to break down how AI models actually get smarter and who gets paid to make it happen.
Complete list of notes (and link to interview below)...
Big takeaways:
- Data labeling is a $30–50B/year market. Ali thinks it hits ~$1 trillion a year within 2–4 years, comparable to compute spend.
- The internet was a one-time gift. Pre-training ran on decades of human-created data. Now that it’s used up, every frontier gain requires net-new data created by human experts.
- micro1 doesn’t sell data. It sells “units of intelligence improvement,” meaning measurable gains in a customer’s model or agent.
- Synthetic data isn’t the bear case. Ali calls it the most bullish case for his business.
How micro1 got here:
- It started as a dev agency Ali ran at Berkeley. His bottleneck was interviewing engineers, so he built an AI screener.
- That screener became one of the first AI recruiters. People hated on it, until it became normal.
- After scaling to a few million in run rate as a talent marketplace, they saw the data industry shifting toward expert data. The hard part of expert data is recruiting experts, which was exactly what they’d built.
Why spend keeps going up:
- Model progress = compute + algorithms + data. Ali argues data is what actually pushes intelligence forward.
- Post-training needs experts distilling their judgment into RL environments. It’s expensive, but the ROI is there.
- The trillions in compute bets assume models keep unlocking new capabilities. If they don’t, those investments are a disaster. So labs have no choice but to keep buying data.
How a data pipeline actually works:
- Step 1: Find the failure. Either a lab hands over a spec, or micro1 diagnoses where the model breaks and pitches the pipeline. That research arm is increasingly important.
- Step 2: Write the spec. Domain, sub-domain, data type, and volume (usually hundreds to tens of thousands of data points over 1–3 months).
- Step 3: Recruit hyper-specific experts. Never “lawyers.” More like M&A lawyers who are great at writing legal memos.
- Step 4: Turn expertise into training signal. Experts create prompts the models fail on, then write the rubrics and verifiers that define a good outcome. AI models assist them throughout.
- Step 5: Manage the pipeline like a factory. Track data quality, throughput, and whether the customer’s model is improving without regressing elsewhere.
Two ways experts grade models:
- Likert-scale evals: experts rate outputs 1–5 on dimensions like completeness or verbosity. Great for subjective, pre-release signal. Not reusable, because every new model means bringing experts back.
- Rubrics: experts write 20–40 binary criteria for a great answer (e.g. “valuation range must fall between X and Y”). More work up front, but a grader model can re-score every future model with no new human time. This is what powers actual RL training runs.
The hard parts about this business:
- Vetting at scale. micro1 interviews tens of thousands of people a day, with 10M+ through the process. Doing that manually would take thousands of recruiters.
- Managing experts. Strategic project leads run each pipeline, hold office hours, and keep experts aligned.
- Quality in subjective domains. Most fields are more subjective than people think, so they need peer review (lawyers reviewing lawyers) plus AI-based QA.
- Reward hacking. They recently caught a Gemini model searching its sandbox for hidden files containing answers. If cheating gets rewarded, models learn that cheating works and become misaligned.
The enterprise opportunity:
- Ali’s bet: Fortune 500/1000 companies converge on ~$100M/year in data spend. That’s roughly 1/10th of a lab, but there are 1000x more enterprises.
- It’s not a software budget. It looks more like payroll: core IP. Framed that way, it’s 1–5% of payroll.
- “Owning your own intelligence” means defining exactly what you want agents to be good at and building an eval stack to measure it. With that stack, models are swappable, open or closed.
- Most enterprises can’t actually use their own data. It’s customer data, so they can’t train or even evaluate on it.
Why everyone’s buying SMB data:
- An RL environment has three parts: seeding data, tasks, and tooling.
- Ali calls it “scaling on realism,” almost a new scaling law. The more realistic the environment, the better the downstream model performs.
- So micro1 licenses operational data (Slack, Google Docs, etc.) from SMBs, transforms the PII instead of redacting it to keep the noise intact, and seeds environments that act as digital twins of real workplaces.
Why synthetic data makes the pie bigger:
- Today, a lawyer writes the memo and the rubric. Soon, the lawyer writes the memo and a model generates the rubric, cutting expert time 50–60%.
- Extrapolate: the model does ~99% of the work and the expert signs off. A 15-hour task becomes 5 minutes.
- When environments are that cheap, pipelines grow 1000x. Experts become 0.1% of the work, but demand for them still goes up. Jevons paradox.
- It’s already happening in coding: 70–80% synthetic, and micro1 still can’t hire coders fast enough.
- Margins shift from expert hours to compute, which is far more controllable.
- Ali’s framing: if you could buy IQ points for your systems almost free, you’d buy all of them.
The “infinite last mile”:
- Knowledge isn’t static. Ali cites a stat that a big share of what med students learn needs relearning within a few years.
- AI accelerates that churn, which creates a feedback loop. There’s no finish line for aligning models with humans.
- Labs today concentrate spend in four domains: medicine, finance, legal, and coding. Every other domain is still waiting on cheaper data to unlock.
Which corner of the AI stack should I break down next?
Link to the full convo with Ali: https://youtu.be/2vL20qxD0BM