AI training platforms

Expert-contractor marketplace by Invisible Technologies, 24,000+ vetted specialists training frontier AI.

Trusted research platform connecting participants with academic and commercial studies.

Selective AI training platform by Labelbox connecting subject matter experts with generative AI improvement projects.

AI-driven platform converting human expertise into training data for frontier AI models, with AI-powered vetting and recruitment.

AI-powered translation platform combining human expertise with adaptive language technology for enterprise localization.

Welocalize's AI data brand with 500,000+ experts across 100+ countries, offering annotation, RLHF, and LLM fine-tuning services.

AI-powered platform connecting vetted remote developers and AI experts with enterprises for software engineering and AI model training.

AI-powered hiring platform connecting expert contractors with AI companies for model training through RLHF and evaluation tasks.

SuperAnnotate-powered platform connecting subject matter experts with AI training projects across STEM, humanities, law, medicine, and creative fields.

We teach machines how experts think, applied research lab connecting 100,000+ verified professionals with frontier AI labs.

AI/ML bootcamp and placement program for Latin American developers on an income-share model (you pay after you land a job). Places graduates into remote AI roles at 200+ partner companies. Online.

Ground-truth data collection for AI and ML: field collection, GIS/mapping, automotive, and robotics testing for Fortune 500 clients. Recruits field + remote contributors globally.

Remote AI training platform offering flexible data annotation, coding, and STEM projects to help advance artificial intelligence.

Expert data platform connecting AI developers with credentialed specialists (MDs, JDs, PhDs) for vertical AI training and red-teaming.

Global AI and language technology company with 250,000+ data specialists providing annotation, translation, and localization services.

AI training data/annotation platform: 500k+ vetted US domain experts label and evaluate data for AI labs. Founded 2020 by Vivian Chen, HQ New York. Task-based pay, $20-150+/hr by specialty.

AI-driven expert network that uses agentic AI to match organizations with subject matter experts.

Delhi freelance marketplace since 2014 plus an AI trainer network. Registered company, but users report fake clients, blocked accounts and weak paid memberships. AI trainer pay unpublished.

Global data engineering company founded in 1988, providing AI training data, annotation, and evaluation services with 4,000+ experts across 40+ languages.

Contribute to AI training and research tasks

Madrid-headquartered global AI training-data services company. Powers 4 of the 5 largest global tech giants across 600+ languages and dialects.

Global AI data solutions provider with a community of 1M+ annotators, delivering data annotation across 500+ languages.

AI recruiting platform connecting startups with vetted Indian software engineers (reference-checked, automated outreach). YC W21. Founded 2021, Bengaluru. ~25 staff. $2.2M+ raised.

Translation, localization, games, and AI training services giant, 6,000+ staff across 50+ countries.

Training-data platform for physical AI (egocentric video, robotics data), part of Reka AI. 10,000+ collectors across 100+ cities. Launched 2025. Backed by NVIDIA, General Catalyst, Khosla, Bessemer.

Expert-level AI training platform connecting PhDs, engineers, creative professionals, and domain specialists with advanced AI development projects.

Human-in-the-loop AI language-data company. Remote gigs in AI voice-mode testing, data collection, transcription, translation, and rating across 350+ languages. Pay ~$17 to $20/hr.

Expert network connecting domain experts with AI labs to build training data. $20 to $100+/hr, 100% remote. 2,500+ experts on its rustBench platform across six fields.

Language services: translation, localization, multimedia and multilingual AI/LLM data. Founded 1996, 400+ staff, 1B+ words a year. Three routes in: in-house staff, freelance linguists, data community.

Human data company collecting high-quality speech and audio data to train and enhance AI systems.

Creators of Label Studio, the most widely adopted open-source data labeling platform, helping teams build high-quality AI training datasets.

Global language services and AI data training company delivering localization, translation, and human-in-the-loop evaluation across 300+ languages.

AI-enablement company providing end-to-end AI services, data curation, model training, annotation, and global AI talent.

Public AI + social-media giant behind Facebook, Instagram, WhatsApp, Threads, Quest VR, Ray-Ban Meta, and Llama.

Established language-services company (since 1980): translation, interpretation, language testing, and training. Employee-owned. Network of 2,500+ linguists across 100+ languages.

AI data solutions company delivering expert annotation, model fine-tuning, and human-in-the-loop workflows for enterprise AI.

Global AI training data provider offering data collection, annotation, and generative AI evaluation in 1,000+ languages.

AI-training-data platform (Ocular AI): conversation-partner sessions, audio transcription, and data annotation for AI labs. Remote, task-based pay ($10-40/hr range), HQ San Francisco.

Uber's enterprise AI division providing data annotation, product testing, and localization services powered by Uber's global gig-worker network across 100+ languages.

WBENC-certified AI/ML data services firm, 342 corporate staff plus a 10,000+ contractor network supporting Microsoft, Meta, and other tech leaders.

AI infrastructure company providing data engines, model evaluation, alignment, and deployment support for enterprises and governments.

Barcelona AI evaluation platform connecting European students and domain experts to paid remote RLHF, red-teaming, and model evaluation work.

AI training platform by Scale AI connecting subject matter experts with generative AI improvement projects in coding, STEM, and writing.

Global language, localization, technology, and AI data company behind DataForce by TransPerfect.

AI research company building models and products like Grok to help people understand the universe and work with advanced AI systems.

Appen's contributor platform providing crowd-sourced AI training data through annotation, evaluation, and content moderation tasks globally.

Get paid for your expertise, AI-native expert marketplace connecting 100,000+ verified professionals with frontier-AI labs and research firms.

Pactera EDGE/Centific's global crowdsourcing platform for AI training, transcription, translation, and linguistic evaluation tasks.

TransPerfect's AI data platform with 1M+ contributors worldwide providing data collection, annotation, and labeling for speech, NLP, and computer vision.

Expert-driven AI training platform by the team behind Toloka, connecting domain specialists with generative AI improvement projects.

AI infrastructure company building high-fidelity multimodal datasets with creative professionals and domain experts for next-generation AI systems.

Developer talent platform matching vetted engineers with software, startup, and AI training projects.

Staffing firm (Allegis Group) placing accounting, finance, HR and business professionals in contract and permanent roles: 8,000+ placed a year.

Human-in-the-loop AI data services and localization (annotation, evaluation, translation in 200+ languages) for AI/LLM training. Now branded TrustScale. Founded 2004, San Jose. Remote-friendly.

AI expert network connecting scientists, engineers, doctors, analysts, and educators with frontier model training and evaluation projects.

Belgian AI training-data specialist, multilingual speech, text, image, and video datasets. Now part of Summa Linguae Technologies.

Global AI training data platform by EBIT Co., Ltd. offering remote data annotation, RLHF, and AI model evaluation opportunities.

Data science and AI learning platform, 19M+ learners. Pays remote instructors to build courses via content fees or royalties, avg ~$1K/month per course, top earners $150K+/yr. Founded 2013, NYC.

AI-training-data and data-labeling platform: contributors review, categorize, and evaluate text, image, video, and financial data. Remote, task-based, HQ San Francisco. Team-based contributor model.

EU-backed enterprise speech and LLM training data: transcription, annotation, audio collection, RLHF. Contributors in 100+ countries, paid by bank transfer, Payoneer or stablecoins. Rates unpublished.

Brazilian healthtech: a primary-care-driven health plan sold to companies, app-first with a dedicated care team and telehealth. Raised ~$175M (SoftBank-led Series C). Brazil-focused hiring.

Localization and AI data company (formerly One Hour Translation), merged into Tasq AI Jan 2026. Network of 25,000 experts. Hires freelance translators, voice actors and reviewers. Rates unpublished.

Enterprise AI company building frontier large language models for content generation, semantic search, RAG, and AI agents.

Full-stack contract workforce platform connecting vetted AI trainers, data annotators, and specialists with enterprises through rigorous pre-screening.

Global data annotation, AI training, and BPO company powering machine learning with human expertise.

Scale AI worker-facing platform for data annotation, labeling, and AI training tasks.

Global outsourcing company for customer experience, content moderation (Trust & Safety), and AI data annotation. Tens of thousands of staff worldwide. Taken private by Blackstone + founders in 2025.

Voice AI platform behind frontier TTS, voice cloning, dubbing, music, and AI agents. $811M raised at $11B Series D valuation.

Career platform connecting students and graduates with AI training, annotation, and evaluation projects from leading AI labs.

Human-compute infrastructure for frontier AI — expert annotation, voice production, and multimodal capture across Physical AI, Medical, Voice, and more.

Tech-enabled workforce augmentation platform: dedicated offshore teams for logistics, healthcare, eCommerce and real estate companies.

AI safety and threat-intelligence company. Adversarial red teaming, model evaluations, and multilingual threat intel for frontier AI labs, AI unicorns, and Fortune 10 companies.

Mission-driven AI data labeling workforce, 7,000 cloud workers in Nepal and Kenya serving 700+ AI customers.

Berlin generative-AI media company creating music, video, and artist content with AI, and building audiences. Founded 2023. Reports 2B+ minutes of watch/listen time in ~18 months.

World's first $5T public company, designs the GPUs and AI infrastructure that power most of modern AI training and inference.

Fintech company using AI and expert intelligence to detect synthetic identity fraud and identity theft for financial institutions.

We hire freelancer for micro AI Task

AI-powered data annotation platform founded in 2018 offering tools for computer vision, NLP, and generative AI training data, plus freelance SME roles.

Remote-first secure-networking company: a zero-config mesh VPN built on WireGuard (zero-trust access). Founded 2019, HQ Toronto. ~177 staff. $275M raised, $1.5B valuation (Series C led by Accel).

Singapore-based global AI data solutions company covering 200+ languages in 100+ countries.

Human data company building AI training datasets from expert work. Remote US contract roles at $20-30/hr, no degree or prior experience needed, and the qualification task is paid.

Expert intelligence for frontier AI, 5,000+ PhDs and domain specialists training the world's top AI labs.

Independent healthcare commercialization agency (formerly BGB Group) merging science and creativity for pharma and life-sciences brands.

AI takeoff and estimating software for construction trades. San Francisco, founded 2023, $35M Series A (Dec 2025, led by 8VC). 40 open roles, mostly SF hybrid.

Decentralized talent network founded in 2018 where top tech freelancers keep 100% of earnings, connecting with brands like Nestle, Goldman Sachs, and Nike.

AI data and technology company helping enterprises design, train, govern, and deploy reliable AI systems.

Two-sided marketplace matching healthcare workers with shifts at nursing facilities.

US nonprofit that develops the SAT, AP, PSAT, CLEP, and Accuplacer exams and runs BigFuture. ~2,000 employees, mostly hybrid or remote. AP Reader summer contractor program for educators.

Healthcare data-analytics company for payers: payment accuracy, risk adjustment, quality (HEDIS), and consumer engagement. Owned by Veritas Capital and KKR at a ~$11B valuation.

Contact-center AI: real-time agent assist, conversational AI, coaching, and analytics for large enterprise teams. Spun out of Stanford AI. Last valued at $1.6B.

Remote staffing agency placing virtual assistants, sales, and customer support talent with client companies. Talent hub in Manila; HQ New York. Founded 2016 by Brianna Carney + Kate Ringcodan.

Open-source computer vision annotation platform originally developed by Intel, supporting image and video labeling for ML model training.

European healthtech: patient booking marketplaces (ZnanyLekarz, Doctoralia) plus SaaS for doctors and clinics. ~2M professionals, 100k+ customers, 12+ countries. Unicorn backed by Goldman Sachs.

Next-gen AI services provider blending GenAI with human expertise across legal, sales, and data operations, with teams in 7 countries.

Applied research lab building high-fidelity simulation gyms for training and evaluating AI agents.

Consumer preventive-health membership at $2.5B valuation, 100+ lab biomarkers reviewed by physicians + the new Medical Intelligence Lab AI model.

The most-comprehensive AI-powered DevSecOps platform.

Cold email outreach and sales engagement platform. Bootstrapped to ~$38M ARR, 40,000+ customers since 2021. Fully remote across 15+ countries, every role remote and read by a founder.

YC S24 startup building AI voice agents for mortgage servicing: payments, escrow, loss mitigation. Founded 2024, SF, team of 10, $2.8M raised. Hiring, but roles are SF in-person, not remote.

Largest external services provider to the video-game industry: localization, QA/game testing, audio, art, and player support. 13,000+ staff in 26 countries. Taken private by EQT in 2024.

One of the largest and longest-running crypto exchanges (spot, derivatives, staking, custody). Founded 2011. Fully remote-first across 70+ countries. Reportedly valued around $15B; IPO expected.

Y Combinator-backed marketplace connecting AI companies with contributors for rights-cleared, multimodal training data collection.

European frontier AI lab (Paris) building open-weight and commercial LLMs, the Le Chat assistant, and an API platform. ~350 staff. ~12B EUR ($14B) valuation, ASML-led 2025 round.

Major US government technology and national-security contractor: defense, intelligence, space, cyber, and federal IT. ~17,000 employees, ~$7B revenue. Backed by Veritas Capital.

AI data annotation platform offering audio recording, LLM evaluation, and red-teaming tasks for remote workers.

Remote staffing company helping businesses build U.S.-based remote teams and advertising roles in support, software, sales, and AI training.

Early-stage AI lab building a computer-use agent and text-to-3D world video. 31 remote-eligible roles listed incl. entry AI-ops work, but founded 2026 on ~$55K raised and no pay published.

DePIN platform turning smartphones into AI data collection tools for noise pollution mapping and voice AI training across 235 countries.

Engineer-founded agency connecting Argentine and Uruguayan software engineers with US startup jobs.

Transparent, pass-through pharmacy benefit manager (PBM) for self-insured employers, backed by cost and rebate guarantees. Founded 2016, San Francisco. CEO Jake Frenz. ~550 staff. $89M raised.

Group of social discovery companies: more than 40 brands, an investment fund and a venture studio, with a fully remote team.

Financial infrastructure for the internet.

Customer engagement platform powering SMS, voice, email, and chat APIs.

Global sports marketing, media and talent company covering creator/athlete marketing and social media publishing.

HR, hiring and payroll platform built for hourly, multi-location teams such as restaurants, retail and healthcare.

Human-centric AI data platform founded in 2014, backed by $72M from Bezos Expeditions, powering generative AI with crowdsourced annotation across 100+ countries.