Learn from someone who built it.

30 to 60 minutes, live, with a peer matched by signal – not by bio. Every session leaves an artifact in your passport: transcript, rating, skill tags, outcome. The learning and the proof are the same thing.

Live

23:47

React Hooks

60 min

You

Maya R.94% match

React · SCI 89

Teaching

Structured learning

Every session builds your credibility.

SCI is not a vanity metric. Five independent evidence components – practice, proof, reliability, freshness, and integrity – produce a single 0-100 score that any employer or platform can trust.

dashboard.tsx

App.tsx

Sharing

Screen shared

Screen sharing

Share your screen for code reviews, live demos, or collaborative problem-solving. Built right into every session.

Whiteboard

editor.tsx

Shared workspace

Whiteboard, code editor, and collaborative tools – all inside the session. No switching tabs or sharing links.

Session feedbackBoth rated

Alex K.

Learner

5.0

Maya R.

Teacher

4.0

Session average

4.5

Mutual ratings

Both participants rate each other after every session. Ratings feed into SCI and help improve future matches.

Evidence pipeline

Session completed

47 min · React Hooks

Mutual rating recorded

4.5 avg · Both participants

Proof written to passport

Immutable evidence event

All evidence recorded

Automatic evidence

Completion, duration, ratings, and skill tags are recorded automatically as immutable proof in your passport.

AvailabilityUTC+3

Mon

Tue

Wed

Thu

Fri

9am

12pm

3pm

6pm

0 slots selectedClear

Click slots to mark when you're free. Matches see overlapping times.

Scheduling

Time zones handled.

Set your availability once, and our system handles the rest. Timezone-aware scheduling ensures you never miss a session or get matched at inconvenient hours.

Automatic timezone detection and conversion for all participants

Set weekly availability slots that sync across time zones

Smart reminders 5 minutes before each session starts

Quality you can count on.

Built-in safeguards ensure every session is productive and fair for both participants.

No-show protection

Automated no-show detection with full refund for the partner who showed up. Repeated no-shows affect your trust score.

Dispute resolution

Fair dispute process with full audit trail. Report issues and our support team reviews with complete session evidence.

Session evidence

Completion status, ratings, and feedback are recorded automatically. Both participants receive verified proof in their passports.

Sessions for every skill type

Code Review

+8 XP earned

Code Review, pair with a peer to review pull requests, debug issues, and learn best practices in real time.

Language Exchange

ENES

30 min conversation practice

Language Exchange, practice conversation in your target language with a native speaker who wants to learn yours.

Design Critique

Portfolio review session

Design Critique, get structured feedback on your portfolio, UI mockups, or design systems from experienced designers.

Interview Prep

Q: Explain closures...

A: A closure is when...

Interview Prep, run mock technical interviews with peers who've been through the process at top companies.

Pair Programming

Live shared editor

Pair Programming, build features together in a shared editor. One drives, the other navigates – then swap roles.

Data Science

Notebook walkthrough

Data Science, walk through notebooks, datasets, and models with a peer who complements your analytical skills.

System Design

Architecture review

System Design, whiteboard architectures together. Practice scaling, trade-offs, and distributed systems thinking.

Music Theory

Ear training session

Music Theory, practice ear training, chord progressions, and composition with a fellow musician.

Getting started

Start learning with peers

Join Lemma to find skill-matched partners, complete sessions, and build a verified portfolio – all for free.

Maya R.

94% match · React & Python

Hey! Ready to swap React for Python?

Absolutely! When works for you?

Tomorrow 3pm? I'll set up the session

Build with our API

Integrate Lemma's skill verification into your hiring pipeline, LMS, or talent platform with our REST API and SDKs.

import { LemmaClient } from "@lemma/sdk";

const client = new LemmaClient({

apiKey: process.env.LEMMA_API_KEY,

});

const passport = await client.verify({

userId: "usr_3x7k9",

skill: "react",

});

// => { tier: "assessed", sci: 84, sessions: 23 }

Start proving what you know.

Early access is rolling out for individuals and teams. No credit card, no PDFs – just the things you made, made visible.