Put your expertise to work. Vetted projects from frontier AI labs.

Matched to your domain. Sourced directly from the labs building it.
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AI21labs
AmFam
Artsy
AWS
Boosted.ai
Charlotte Hornets
Cohere
ElevenLabs
Group III International
Grubhub
Headway
Microsoft
Sedgwick
Swissgear
You.com

AI training

What do I do as a Meridial expert?

Teach AI how to think like an expert.

Write the responses, reasoning, and judgment calls that AI models learn from.
Response writer that with a text box to respond.

Be the standard AI gets measured against.

Evaluate outputs, surface what's wrong, and push quality in the direction only a real expert can.
Content review with options whether it's safe, needs review, or not appropriate.

Define what "good" looks like.

Design the tests that determine whether AI actually knows what it's doing. Your rubrics shape how models get built and is held accountable.
A chart showing model performance improving over time, with 94% accuracy, 1.2k approved, and 10 flags.

Now recruiting

Industries requiring your expertise.

If you hold deep credentials or broad technical capabilities, there's meaningful AI work for you.

Language & linguistics

Translate, annotate, and evaluate AI outputs across 110+ languages — from syntax analysis to cross-cultural nuance review.
A woman in her living room, sitting at a desk with her laptop. She's wearing a headset and is on a video call. There is a dictionary beside her.

Sciences

Evaluate AI-generated scientific content across biology, chemistry, physics, and environmental science for accuracy and research-level rigor.
A man in a white office is sitting at his desk working on a computer with a book open beside him.

Business & professions

Apply professional judgment across strategy, operations, consulting, and B2B expertise to evaluate and shape AI business reasoning.
A woman in a white home office is sitting at a desk working on a laptop.

Engineering & technology

Review AI outputs in mechanical, electrical, civil, and systems engineering — where technical precision and domain standards are non-negotiable.
A man in a wheelchair sitting at a desk with three monitors and a laptop, working on the laptop. Some images of engineering designs on screen.

Coding

Write, debug, and evaluate AI-generated code across Python, JavaScript, SQL, Rust, and more — from snippet review to architecture assessment.
A developer working at a desk with two monitors and a laptop, writing code.

Medical & healthcare

Evaluate clinical reasoning, diagnostic logic, and medical literature for AI models — from general practice to specialist and surgical knowledge.
A doctor sitting at a desk in an office in front of a laptop.

Finance & mathematics

Assess AI financial modelling, investment logic, risk analysis, and quantitative reasoning — from CFA-level review to competition mathematics.
A man sitting at a desk with two monitors with charts and spreadsheets displaying Q3 portfolio performance. He is in a home office.

Creative & multi-media

Evaluate AI-generated fiction, screenwriting, poetry, and visual storytelling for craft, voice, originality, and narrative structure.
A person sitting at a desk in front of a laptop and writing on a tablet. Photographs they took taped on the wall behind them and books about photography on the desk.
Language & linguistics

Language & linguistics

Translate, annotate, and evaluate AI outputs across 110+ languages — from syntax analysis to cross-cultural nuance review.
A woman in her living room, sitting at a desk with her laptop. She's wearing a headset and is on a video call. There is a dictionary beside her.
Sciences

Sciences

Evaluate AI-generated scientific content across biology, chemistry, physics, and environmental science for accuracy and research-level rigor.
A man in a white office is sitting at his desk working on a computer with a book open beside him.
Business & professions

Business & professions

Apply professional judgment across strategy, operations, consulting, and B2B expertise to evaluate and shape AI business reasoning.
A woman in a white home office is sitting at a desk working on a laptop.
Engineering & technology

Engineering & technology

Review AI outputs in mechanical, electrical, civil, and systems engineering — where technical precision and domain standards are non-negotiable.
A man in a wheelchair sitting at a desk with three monitors and a laptop, working on the laptop. Some images of engineering designs on screen.
Coding

Coding

Write, debug, and evaluate AI-generated code across Python, JavaScript, SQL, Rust, and more — from snippet review to architecture assessment.
A developer working at a desk with two monitors and a laptop, writing code.
Medical & healthcare

Medical & healthcare

Evaluate clinical reasoning, diagnostic logic, and medical literature for AI models — from general practice to specialist and surgical knowledge.
A doctor sitting at a desk in an office in front of a laptop.
Finance & mathematics

Finance & mathematics

Assess AI financial modelling, investment logic, risk analysis, and quantitative reasoning — from CFA-level review to competition mathematics.
A man sitting at a desk with two monitors with charts and spreadsheets displaying Q3 portfolio performance. He is in a home office.
Creative & multi-media

Creative & multi-media

Evaluate AI-generated fiction, screenwriting, poetry, and visual storytelling for craft, voice, originality, and narrative structure.
A person sitting at a desk in front of a laptop and writing on a tablet. Photographs they took taped on the wall behind them and books about photography on the desk.

How it works

From sign-up to first project.

Every engagement is scoped via a Statement of Work, so you see what's involved, what it pays, and length of the project before you commit. Work when it suits you, on the engagements that fit your expertise.*

Join the Meridial network
01

Create a profile

Fill in your profile, indicate your skills, and complete a brief confirmation step.

02

Browse & apply to projects

Find engagements that fit.

03

Get set up & start earning

Sign Statement of Work and choose when you engage.

*

Access to the Meridial network does not guarantee project engagements. Project availability varies based on client needs, expertise needed, and geographic eligibility. Meridial connects independent contractors with AI training opportunities — contributors are not employees of Meridial. Rates are confirmed before you begin.

What our experts say

Real people.
Real results.

Don't just take our word for it — see what our experts are saying.

"Engaging with a broad spectrum of projects has allowed me to apply my diverse skills and expertise and has been a rewarding experience."

Agustina
Argentina

"My engagements with Meridial have allowed me to take on projects that align with my motivation and utilize my expertise."

Andrei
Romania

"Meridial's network allows me to structure my day efficiently, balancing personal and professional commitments."

Ishtiyaq
India

"The flexibility of project-based tasks on the Meridial network has allowed me to better manage my professional and personal priorities, selecting engagements that fit my schedule."

Rocio
Argentina

"I get to challenge myself and learn new things, while being able to get my son off to school every morning and be present for family and friends."

Mary
USA

"My background in STEM and fiction writing allows me to bring both analytical precision and creative insight to my projects."

Susan
Colombia

"I balance my time between studying for the GRE, making music, doing occasional counseling, and training AI models through Meridial."

Faraaz
Bangladesh

"It's nice to have this opportunity of being involved in many sectors of the human process for AI training, and Meridial provides that flexibility to all experts."

Dante
Austria

"Engaging with a broad spectrum of projects has allowed me to apply my diverse skills and expertise and has been a rewarding experience."

Agustina
Argentina

"My engagements with Meridial have allowed me to take on projects that align with my motivation and utilize my expertise."

Andrei
Romania

"Meridial's network allows me to structure my day efficiently, balancing personal and professional commitments."

Ishtiyaq
India

"The flexibility of project-based tasks on the Meridial network has allowed me to better manage my professional and personal priorities, selecting engagements that fit my schedule."

Rocio
Argentina

"I get to challenge myself and learn new things, while being able to get my son off to school every morning and be present for family and friends."

Mary
USA

"My background in STEM and fiction writing allows me to bring both analytical precision and creative insight to my projects."

Susan
Colombia

"I balance my time between studying for the GRE, making music, doing occasional counseling, and training AI models through Meridial."

Faraaz
Bangladesh

"It's nice to have this opportunity of being involved in many sectors of the human process for AI training, and Meridial provides that flexibility to all experts."

Dante
Austria

What is Meridial?

Meridial is an expert contractor marketplace powered by Invisible Technologies. We connect domain experts, in law, STEM, finance, coding, linguistics, safety, and other fields, with AI training projects that require specialized human knowledge and judgment.

Who is Meridial for?

Meridial is for subject matter experts across domains including law, medicine, coding, finance, creative writing, and others, who want to contribute and provide their services to frontier AI development.

What kind of work do Meridial experts do?

Meridial experts provide critical feedback through traditional Reinforcement Learning from Human Feedback (RLHF) and Supervised Fine-tuning (SFT) processes like writing and answering prompts, evaluations, ranking responses, improving chain of thought reasoning, and red-teaming. Additionally, experts play a critical role in creating Reinforcement Learning (RL) environments, performing tasks like environment design, trajectory validation, judge model calibration, reward signal design, and edge case identification.

How does Meridial work?

Experts create a profile, complete a brief confirmation step, and browse available opportunities for engagement. Those matched to a project sign a Statement of Work and contribute on their own schedule. There are currently 700+ engagements across 12 domains.

What do Meridial experts earn?

Earnings are set per project and determined by experience and expertise. Meridial publishes the rate range on each engagement, so experts can assess the opportunity before engaging.

How is Meridial different from other AI training platforms?

Meridial sources engagements directly from the labs building frontier AI, rather than operating as an open marketplace. Domain expertise is matched with specific projects, giving experts access to cutting-edge work from top frontier models and enterprises.