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