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Here is the complete list of all 58 companies and platforms mentioned in your text, organized alphabetically with their descriptions kept intact (page numbers and conversational filler have been removed for clarity): 1. Acolad Acolad is a global leader in translation and content solutions Their specialized Al Data Services division designs custom multilingual transcription data labeling, and semantic annotation workflows to scale and benchmark generative Al models Roles: Multilingual Data Annotators, Freelance Editors, Translators, and Post-Editors of machine-translated datasets. Compensation & Schedule: Remote, flexible freelance opportunities across over 500 language combinations. Sources & Careers: Acoled Data Services for Al. Freelance Opportunities at Acolad, Benchmarking Multilingual Transcription Study, Acolad Community Job Review 2. Al21 Labs Al21 Labs is a research-first enterprise Al company known for its proprietary Jamba models and writing assistant tools. Opportunities: Al21 Labs operates similarly to Cohere. They do not run a public crowdwork platform or hire freelance annotators directly Instead, their model alignment, supervised fine-tuning (SFT), and red-leaming are handled intemally by full-time NLP researchers and computational linguists, or outsourced to certified enterprise data foundnes. Sources & Careers: A121 Docs on Fine-Tuning, Al21 Labs Jobs and Careers, Al21 Labs Review on Al Training Jobs 3. Alignerr (by Labelbox) Aligner matches subject matter experts with leading Al research labs to evaluate and refine Al models across various fields. Roles: Al Language Experts (Japanese, Portuguese, etc.), Biology Masters, Teacher & Tutor (Al Training), and Python Software Engineers Compensation & Schedule: Remote contracts, typically requiring a commitment of 10-40 hours per week Pay ranges from $15 to $150/hr Loften averaging $40-$120/hr for specialists). Sources & Careers: Aligner Homepage. Alignerr Open Roles, Al Training Specialist Job, Remote Al LLM Trainer - Alignerr on WayUp 4. Anthropic The safety-locused Al research lab behind Claude, Anthropic, relies heavily on human feedback, alignment stress-testing, and red-leaming to ensure their models remain steerable and reliable. Roles: Al Safely Fellows, Frontier Red Teaming members, and Research Operations specialists. Opportunities: While Anthropic primarily utilizes elite crowd-platforms for broad RLHF and prompt-response rating, they directly hire remote-friendly Safety Fellows and independent contractors to stress-test Cleude's alignment rubrics. Sources & Careers: Anthropic Careers Anthropic Open Jobs, Al Safety Fellow Application, 80,000 Hours Safety and Red Team Overview 5. Appen Appen is a long-standing provider of human-annotated data for machine learning, now operating through its newer CrowdGen platform. Roles: Multilingual LLM Trainers, Al Chatbot Language Specialists, and Social Media Video Evaluators. Compensation & Schedule: Flexible freelance contract work, with pay ranging from $15 to $25 /hr. Sources & Careers: Appen Сагeers, Apреп Нотерзоe. CrowdGen by Appen 6. Braintrust Braintrust is a decentralized, Web3-based talent network that matches alite freelancers with major enterprise projects, including large-scale LLM training and Al evaluation initiatives Roles: Writers / Al Annotators Al (Agent Focus) Subject Matter Experts, and Senior Coding Annotators/LLM Evaluation Engineers Compensation & Schedule: Remote freelance contract model where talent keeps 100% of their earnings, Rates range from $20 to $40/hr for generalisis, 1ip to $65 to $75/hr for senior evaluation roles Sources & Careers! Browse Jobs on Braintrust Braintrust Careers Page, A/LLM Trainer Job Review. Toloka Al Project on Braintrust 7. Centaur Labs Centaur Labs specializes in medical and scientific data tabeling at scale. They recruit medical professionals and life sciences experts to evaluate health-focused LLMs and clinical datasets Roles: Medical Consultants and Health Al Trainers (for medical students, residents, board-certified clinicians, and healthcare professionals) Compensation & Schedule: Flexible ad-hoc contracted work from anywhere, paying around $30/hr depending on specific clinical qualifications. Sources & Careers: Centaur Labs Careers, Centaur Labs LLM Training Page, Medical Consultant Network Sign-Up 8. Centific (including OneForma) Centific operates as a frontier Al data foundry, partnering with leading model labs. They employ a dedicated Al Research team and run the OneForma contributor community. Roles: Al Trainers (English and bilingual), Applied Reinforcement Leaming Engineers, and Data Annotation Specialists. Compensation & Schedule: Flexible, remote, project-based contracts. Entry-level, non-coding roles pay -$15 to $25/hr Sources & Careers: Centific Careers, OneForma by Centific Centific Homepage 9. Character.ai Character al develops interactive entertainment chatbots and educational persones that converse dynamically with users. Opportunities: While Character.ai employs deep leaming models that continuously, adapt to conversational styles, they do not manage a direct public crowd of prompt raters. Instead, their system is designed for "implicit feedback" where real-time user ratings and text Interactions serve as the primary training data, Sources & Careers: Character al Careers Page, Character al Functionality en Upwork 10. Clickworker Clickworker broken down complex datasets into microjobs and distributes them to a worldwide community of freelancers to help train commercial Al models. Roles: Crowd Contributors and Al Response Reviewers. Compensation & Schedule: Fully remote task-based work managed via their mobile app, utilizing assessments to unlock higher-paying reviews and recording gigs. Sources & Careers! Clickworker Homepаде. Весоmе a Clickworker and Eam Online 11. CloudFactory CloudFactory is a global leader in human-in-the-loop Al solutions. Supported by a community of over 7,000 expertly managed data analysts, they partner with global organizations to curate, annotate, and optimize datasets across the Al development lifecycle Roles: 30 Data Annotation Specialists, Data Specialists (for computer vision, NLP, and back-office data processing) Compensation & Schedule: Flexible, supportive remote roles with rolling starts: Sources & Careers: Careers at CloudFactory, Data Specialist Careers Page, 3D Dala Annotation Specialist Job Listing CloudFactory Remote Jobs Guide 12. Cohere Cohere is a developer-focused enterprise Al foundation model provider that directly hires specialists to supervise the alignment of their LLMs. Roles: Senior Al Data Trainers, Post-Training Staff, and Research Engineers. Compensation & Schedule: Competitive technical compensation with high-ownership, fully remote opportunities across the US, Canada, and Europe. Sources & Careers: Cohere Jobs Platform Senior Al Data Trainer Listing 13. DataAnnotation DataAnnotation offers on-demand, hourly contract-based Al training and chatbot evaluation roles. Roles: Al Training Specialists (Quantitative, Coding, and Generalist). Compensation & Schedule: Fully remote, on-demand work. General tasks typically start around $520/nr$ while quantitative and coding specialties pay $40 to $560 /hr$ Sources & Careers: DataAnnotation on Indeed 14. DataForce (by TransPerfect) DataForce is the specialized Al-data division of TransPerfect the world's largest provider of language and Al services, Backed by a community of over 1.3 million contributors, they help enterprise clients build and refine Al systems. Roles: Language Dala Annotators, Education Subject Matter Experts (SMEs), and Speech/Text Transcribers Compensation & Schedule: Remote temporary or contract-based employment (often up to 40 hours/week, Monday through Friday during business hours). Sources & Careers: DataForce Community Homepage, DataForce Al Solutions, TransPerfect Al Data Collection & Annotation Services, Language Dala Annotator Job on Startup Jobs 15. Dataloop Dataloop provides an enterprise-grade, Al-assisted data annotation platform They integrate with freelance networks (such as OpenTrain Al) to hire remote annolators and data quality specialists to verify, classify, and audil multimodal datasets Roles: Multimodal Al Data Annotators, OA and Verification Specialists Compensation & Schedule: Remote, task-based, and asynchronous work schedules Sources & Careers: Dataloop Platform Careers, Dataloop Project Team Documentation, Dataloop Integration on Open Train Al 16. Defined.ai Defined.ai is an enterprise-grade Al training data platform that relies on a global, certified workforce to annotate datasels and validate LLM outputs. Roles: Al Data Specialists, language annotaters, and translation specialists. Compensation & Schedule: Fully remote, project-based work with strong focus on ethical data sourcing and strict guidelines. Sources & Careers: Defined al Platform, Defined al Career Page 17. ElevenLabs ElevenLabs is a rapidly growing Al audio and speech-synthesis startup. To support their highly realistic text-to-speech, dubbing, and voice-cloning models, they actively recruit a global network of remote freelance language specialists. Roles: Freelance Translators, Linguists, Transcriptionists, and Subtilling Specialists Opportunities: These roles are fully remote and project-based. Contributors help translate, transcribe, and validate multilingual voice models to improve speech synthesis quality Sources & Careers: Elevent abs Careers, Transcription/Subtitling Specialist (Freelance) Job, Translator/Linguist (Freelance) Job. Freelance Specialist Network Details 18. Experis (by ManpowerGroup) As a major technical staffing agency, Experis recruils remote language specialists and SFT trainers on W2 contracts on behalf of major technology companies to support AR/VR UX research and LLM quality audits. Roles: Language-Specific Data Annotators / Data Quality Analysis (representing Dutch, Swedish, Hebrew, Japanese, and Thai) Compensation & Schedule: Fully remote temporary positions (typically structured as 3 to 6 month contract assignments, matching US. PST business hours). Stanriard pay is $20.00/hour on an Expertis W2 Sources & Careers: Dutch Language Dala Annotator Job on ZipRecouter Dutch Language Data Annotator Listing on Lensa. Swedish Language Dala Annotator Listing on Lensa, Hebrew Language Data Annotator Listing on Lensa 19. Humans in the Loop Humans in the Loop is an award-winning social enterprise providing ethical data annotation and "human-in-the-loop" verification. They specialize in high-accuracy datasets and maintain an active training center to equip contributors with digital freelancing skills. Roles: Data Annotators, Quality Analysis, and Al Model Evaluators. Compensation & Schedule: Remote micro-freelancing tasks with highly flexible scheduling Sources & Careers: Humans in the Loop Homepage, Humans in the Loon Careers. Humans in the Loop Training Center 20. iMerit (including iMerit Scholars) Meril is an established Al data annotation and model fine-tuning company. Through their IMerit Scholars program, they match credentialed domain experts (representing medicine, finance, law, linguistics, and STEM) with Al projects to perform prompt tuning. RLHF and model evaluation. Roles: Generalist Al Trainers, Subject Matter Expert (SME) evaluators, and Language Annotators (such as Danish). Compensation & Schedule: Flexible, remote task-based work Specialized bilingual annotators (eg, Danish) can eam around $30/hr Sources & Careers: Merit Scholars Platform. IMerit Scholars Skills & Experts, iMent Careers, Danish Language Annotator Job on BeBee 21. Invisible Technologies Invisible Technologies uses a modular delegation engine to train and refine Al models for enterprise clients. Roles: Tutoring Specialists, Language Alignment Specialists, and Coding/Python Specialists. Compensation & Schedule: Asynchronous, fully remote contract positions with flexible work hours. Sources & Careers: Invisible Technologies Homepage, Invisible Technologies Careers, Tutoring Specialist Role 22. Keylabs Keylabs is a streamlined, At-enhanced data labeling platform that employs a network of remote annotation specialists. They provide context to raw data for advanced vision Al, clinical text modeling, and LLM development. Roles: Remote Text Annotators (Clinical Records, Entity Recognition), Video/Image Segmenters, and LLM Training Annotators Compensation & Schedule: Flexible, project-based remote contracts Sources & Careers! Keylabs Annotation Platform, Large Language Model Annotation Guide Keylabs Labeling Tool Specifications 23. Label Your Data Label Your Data offers secure and compliani annotation services supplying ML teams and research labs with tallored datasets across multimodal frameworks (such as audio, image, text, and LiDAR) Roles: Remote Data Labelers, Multimodal Annotators, and LLM Fine-Tuning Support Specialists Compensation & Schedule: Fully remote freelance and contract roles. Sources & Careers: Label Your Data Overview on Remote Rocketshie 24. Lilt Lill is an enterprise Al translation and localization platform. They use a "human-in-the-loop" model where translation experts work in tandem with neural machine translation engines to iteratively refine text and train multilingual datasets. Roles: Translators, Editors. Al Data Experts, and Language-Specific Al Content Experts (eg., Slovenian, Estonian, Dari, German) Compensation & Schedule: Globally remote, task-based freelance opportunities with flexible hours. Sources & Careers: Lilt Homepage, Careers in Al Translation at Lilt. Lilt Production Jobs Platform. Lilt Slovene Al Content Experts Page 25. Lionbridge Lionbridge is a long-standing localization and translation company that matches freelance partners with global Al data collection and evaluation initiatives. Roles: English and Bilingual Transcribers, Search Quality Raters, and Al Content Evaluators. Compensation & Schedule: Fully remote, self-set schedule Transcription and translation/annotation roles typically start at $10 to $920/hr$ Sources & Careers: Lionbridge Portal Lionbridge Al Careers Join the Lionbridge Freelance Community 26. LXT LXT partner with crowd-contributor networks like clickworker to deploy global annotators for data collection, categorization, and localization. Roles: Crowd Contributors and Al Training Data Specialists. Compensation & Schedule: Flexible schedule with weekly payments. Sources & Careers: XT Jobs 27. Macgence Macgence is a leading provider of high-quality Al training data solutions, specializing in fully managed human-in-the-loop services for generative Al and LLM augmentation Roles: Data Annotators (6-Month Contract), Medical Annotation Specialists, Bounding Box Annotators, Data Transcription Specialists, and Senior Code Reviewers (Python Docker) for LLM Data Training Compensation & Schedule: Fully remote and part-time freelance opportunities, focusing on high-accuracy dataset curation Sources & Careers: Macgence Al Careers Portal, Macgence Freelance Page, Data Annotator Position, Segmentation Annotation Listing 28. Mercor Mercor is an Al-powered talent marketplace organizing human intelligence to train frontier models, build SFT/RLHF datasets, and refine reward modeling. Roles: ML Evaluation Designers, Expert Model Trainers, Generalist Al Trainers, and Al Content Evaluators. Compensation & Schedule: Fully remote, asynchronous roles. Experienced ML Evaluation Designers can earn $45 to $140/hour. Sources & Careers: Explore Remote Work on Mercor, Mercor Experts Platforms. Ereelance Al Training Jobs Guide 29. Meridial Al Meridial Al matches freelance contributors with customized training projects sourced from major frontier Al laboratories Roles: Coding Specialists, Al Generalists, and Language Specialists (Korean. Hindi, Luo, Japanese, Mandarin, Ukrainian). Compensation & Schedule: Fully remote, on-demand hours. Pay typically ranges from $6 to $65/hr depending on language requirements and geographic location. Sources & Careers: Mandlal Al Projects 30. Microsoft, Amazon, Google, and Meta These massive cloud and technology giants do not typically recruit or manage freelance Al annotator workforces directly under their primary corporate banners. Instead, they rely heavily on established vendor-staffing networks and certified enterprise partners that we have already discussed. Microsoft & Meta utilize professional staffing agencies like Experis to hire language-specific annotators on structured W2 contracts, and partner with data foundries like Centific. Google leverages global crowdsourcing networks, primarily TELUS Digital. Welocalize, and Appen to rate search results and evaluate assistant responses Amazon operates AWS SageMaker Ground Truth, which facilitates data labeling by integrating directly with crowdsourced microtask platforms such as Amazon Mechanical Turk 31. Mindrift Mindrift matches domain experts with projects to craft, edit, and audit professional-grade datasets for LLM development Roles: Freelance Al Trainers in Biology, Chemistry, Computer Science/Python, Civil Engineering, and English Writing. Compensation & Schedule: Flexible contract work with bi weekly paymerits. Pay rates range from $15 to $100 /hr depending on the specialized field. Sources & Careers: Mindrift Al Training Jobs. Mindrift Remote Projects for Experts 32. ModSquad ModSquad has operated a distributed, remote-first model since 2007. They hire a global network of independent contractors called "Mods" (spanning 90 countries) to manage content moderation, customer support, and Al dataset review Roles: Content Moderators Community Managers, and specialized Al Training Moderators (e.g., Technology, Hardware & Consumer Electronics). Compensation & Schedule: Remote freelance contract model where "Mods" select their preferred projects and work on their own hours Sources & Careers: ModSquad Join the Mods, ModSquad Homepage, MoxlSquad Trust & Safety Solutions. Remote Content Moderator Job Listing 33. OneForma OneForma hires remote translation and localization specialists to train LLMs for global alignment Roles: Language Specialists and Subject-Matter Expert Al Trainers (e.g., Dermatologist Al Trainers) Sources & Careers: OneForma Job Review on YouTube, OneForma Dermatologist Job 34. OneSpace (formerly CrowdSource) OneSpace is an established microtask platform that connects freelance contractors with digital tasks-such as translation evaluation, copy editing, transcription, and contextual categorization to enrich machine learning databases. Roles: Remote Freelance Specialists and Al Language Data Annotation Specialists Compensation & Schedule: Task-based remote gig work allowing you to choose your own hours. Sources & Careers: Global Microtask Platforms Guide on Scribd (Referencing OneSpace), Data Arinotation Specialist Profile on Himalayas (Referencing OneSpace / CrowdSource / FlyWheel) 35. OpenAl OpenAl, the creator of Chat GPT, utilizes human feedback as a core element of its training pipeline (RLHF), While they outsource massive volumes of general data labeling to external partners (such as Outlier and Surge All, they also maintain an in-house Human Data program team Roles: Program Managers (Fluman Data), Full-Stack Engineers (Human Data), and specialized temporary Al Trainers. Opportunities: In-house Program Managers coordinate directly with extemal vendors and calibrate Al trainers on complex, bespoke deta campaigns. They occasionally hire direct contract-based Al Trainers for high-stakes modeling Sources & Careers: OpenAl Careers, Careers Search, Program Manager. Human Data Role. Software Engineer, Human Data Role 36. OpenTrain Al OpenTrain Al is an aggregator platform that brings together Al training and data annotation opportunities from over 20 platforms. Roles: Freelance Al Trainers and Data Labelers Sources & Careers: OpenTrain Al Become Freelancer 37. Outlier Al Outlier Al specializes in building Al models using expert human feedback. They hire freelancers globally to write, review, and evaluate training datasets Roles: Al Trainers, Al Math Tutors, Generalist Al Contributors, and Bilingual Writers (eg, Dutch, Bengali) Compensation & Schedule: Flexible schedule where contributors select their own hours, Pay ranges from $15 to over $100/hr. depending on domain expertise Sources & Careers: Outlier Al Homepage, Outlier Open Opportunities 38. Perplexity Perplexity builds Al-native search engines and conversational answer engines Opportunities: Perplexity does not directly contract remote freelance Al rater crowds. Their post-training team focuses on sealing retrieval, SFT. and direct reinforcement leaming from Al feedback (RLAIF) using proprietary query-and-response datasets. Any manual evaluation is managed internally by full-time Data Scientists and Al Researchers. Sources & Careers: Perplexity Careers Hub. Member of Technical Staff Al Researcher Role 39. Prolific Prolific is a premium platform that builds high-quality human datasets for Al developers, scientific researchers, and organizations. They frequently hire for subject-specific and generalist Al training roles. Roles: Al Training Specialists, Al Trainers (Mathematics. Neuroscience Machine Leaming, Advariced HTML/CSS, and Language Specialists). Compensation & Schedule: Offers highly flexible remote roles. General Al Training Specialists eam~$52,000 to $62.400/year, while specialized advisory roles (such as Neuroscience PhDs) pay upwards of $40 /hr. Sources & Careers: Prolific Careers, Al Training Specialist Job Application, Neuroscience Al Trainer Lisling 40. Reka Al (Listed as "Rek" in the image) Reka Al builds state-of-the-art multimodal models (such as Reka Flash and Reka Core) capable of processing video, Image, audio, and text. Opportunities: As a highly technical, mid-sized research lab, Reka Al does not currently host an independent freelance annotation crowd. Their multimodal data verification and SFT are conducted by internal Machine Leaming Engineers and research partners, or sourced through third-party expert networks. Sources & Careers: Reka Al Careers, Remote Jobs al Reka Al 41. Sakana Al, Stability Al, Black Forest Labs, and Inflection Al Opportunities: These organizations are specialized research startups focusing on distinct modalitles (e.g., Stability Al and Black Forest Labs for image/video generation, Sakana Al for autonomous science agents). Due to their lean strictures, none of these companies maintain in-house, remote freelance annotation crowds. Instead, they rely on pre-existing open-source datasets or outsource their RLHF image rating and SFT requirements to third-party data collection partners Sources & Careers! Stability Al Careers, Sakana Al Careers, Black Forest Labs Careers. Inflection Al About Page 42. Sama Sama provides high-quality training data to Fortune 2000 companies. They hire remole evaluators to ensure LLM responses meet safety accuracy, and quality guidelines Roles: Al Evaluators (English and Hindi), Data Annotation Agents, and SFT/RLHF Evaluators Compensation & Schedule: Fully remote, requiring critical research skills and a bachelor's degree. Offers structured training programs. Sources & Careers: Sama Careers, Al 101 for Data Annotators, Remote Al Evaluator Listing.on. Remote OK 43. Scale Al A major player in the Al infrastructure and data labeling industry, Scale Al hires Independent specialist trainers in addition to managing Outlier Al. Roles: Al Tutors (Tier 1), Writing Experts, and Al Training Consultants in Coding Compensation & Schedule: Work from anywhere Pay rates vary, typically starting around $20-$50 /hr, with writing positions offering project rales (averaging -635k annually) Sources & Careers: Scale Al Careers, Scale Al Tutor (Tier 1) on Wellfound, Scale Al Coding Consultant Job on Built In 44. Sigma Al Sigma Al Is a global data collection and labeling company that grounds language models in verified human context. They specialize in preparing and labeling speech, text, image, and video datasets. Roles: Translators, Annotators, and Bilingual Linguis Experts (representing over 30 languages, including Tamil, plautdietsch, Serbian, Kannada, Romanian, Portuguese, Igbo, and Luo). Compensation & Schedule: Remote, flexible contract work focusing on cultural translation, corpus analysis, and language data annotation. Sources & Careers: Sigma Group Careers, Sigma Al Homepage 45. SME Careers (by SuperAnnotate) SuperAnnotate's SME Careers portal connects academic and technical subject matter experts with LIM post-training optimization opportunities Roles: Subject Matter Expert (SME) AI Trainers in Physics, Medicine, Legal, and other advanced academic fields Compensation & Schedule: Fully remote contract projects tailored to the expert's schedule. Sources & Careers: SME Careers Homepage