The trust layer for skills.
Lemma started with a simple observation: the people who know the most are rarely the people who can prove it. We built the infrastructure to change that.
Why Lemma exists.
We started Lemma because the most skilled people we knew couldn't prove it. Not on paper. Not on LinkedIn. Not anywhere that mattered to someone who'd never met them.
The skills economy needed a trust layer — one built on evidence, not claims. One where a session between two practitioners creates a permanent record that outlasts any resume.
Proof over claims. Always.
- Event-sourced evidence that can't be altered
- Peer validation from real practitioners
- Open formula — every point is traceable
- Your data, your passport, your control
What we stand for.
Proof over claims
We don't accept self-reported data. Every skill assertion is backed by verifiable evidence before it counts.
Open by default
Open API, open methodology, open formula. Trust requires transparency. We show our work.
Community first
The community is the product. Learners, teachers, and the sessions between them are what make Lemma real.
Long-term thinking
We're building infrastructure, not a product sprint. Every decision optimizes for trust over time.
The people building it.
Roma K.
Founder & CEO
Building the infrastructure for provable skills.
Alex T.
Head of Engineering
Event-sourced systems and distributed architecture.
Dana S.
Head of Design
Making trust feel intuitive and beautiful.
Maya R.
Community Lead
Growing the network of learners and teachers.
Jordan L.
Growth
Turning proof into opportunity.
Sam P.
Research
Understanding what real skill looks like at scale.