Top Audio Annotation Companies

FiveS Digital is an India-based AI data operations company with 16-plus years of experience and over 50 million annotations delivered annually across nine global locations. Recognized by the Everest Group as a Major Contender for data annotation and labeling solutions, FiveS Digital delivers audio annotation services covering speech transcription, speaker diarisation, emotion classification, and acoustic ... read Fives Digital reviews & insights

Ulatus is a trusted translation company serving over 200,000 clients worldwide, with two billion-plus words translated across 200 language pairs. Their linguistic depth extends naturally into audio annotation services — particularly for multilingual speech datasets where phonetic accuracy, dialect sensitivity, and language-specific nuance determine training data quality. For AI teams seeking audio annotation service providers ... read Ulatus reviews & insights

LabelOps is a globally recognized audio annotation company and the No.1 data labeling platform for AI teams. Offering comprehensive Audio Labeling Services, including speech transcription, audio translation, sound classification, and emotion tagging, LabelOps equips recorded audio with rich metadata, powering smarter chatbots, virtual assistants, and NLP-driven speech recognition models across healthcare, retail, and autonomous vehicle ... read LabelOps reviews & insights

BorderlessMind stands among trusted audio annotation companies delivering dedicated, pre-vetted annotator talent since 1999. Their managed audio annotation services — covering speech transcription, audio labeling, and NLP-based sound classification- are backed by expert AI annotators across India, Latin America, and Europe, serving startups, SMBs, and enterprises with flexible, NDA-protected engagement models and the highest-accuracy AI ... read BorderlessMind reviews & insights

Crystal Hues Limited is a two-decade-old organization, uniquely positioned as the ideal partner providing complete communication life-cycle services through its four specialized verticals namely CHL Localization focused on translation and localization, CHL Worldwide focused on integrated advertising, CHL SofTech focused on building technology solutions and CHL Digital focused on digital marketing. The procedures and systems ... read Crystal Hues Limited reviews & insights

Before AI-powered tools can identify objects or understand speech, they need people to teach them. The human-in-the-loop model assumes that machines improve their performance using data processed by humans. Only with people’s help can AI deliver relevant search results, recognize faces, recommend products, identify diagnoses, etc.Machine learning (ML) models become effective only when they learn ... read Human Annotation reviews & insights

VideoDB: Give AI agents eyes and ears VideoDB is a modern backend for AI agents, giving them the ability to see, understand, and act on video and audio in real time. It unifies storage, indexing, streaming, editing, memory, retrieval, and delivery into a single programmable system. VideoDB turns this raw, unstructured media into structured, searchable ... read VideoDB reviews & insights

DataVLab is a data annotation partner helping AI teams build accurate training datasets for computer vision, NLP, and multimodal models. We support image/video labeling (bounding boxes, polygons, keypoints), text annotation (NER, classification), and audio transcription, with flexible capacity and fast turnaround. Our human-in-the-loop workflow includes multi-stage QA, clear guidelines, and secure handling of client data ... read DataVLab reviews & insights

Remote Labeler is a well-established and trusted provider of specialized data annotation services, operating at the forefront of innovation in the realm of artificial intelligence (AI) and machine learning (ML). Our unwavering dedication is fueled by the profound impact that AI and ML technologies have on industries across the spectrum, from healthcare and automotive to ... read Remote Labeler reviews & insights

We started our business in 2018 in Kyiv, Ukraine, and it has grown into an international company with its headquarter in Palo Alto, California, USA.We bring expertise in Data Annotation, Data collection and AI modules creation. With a team of more than 150 tech specialists, we have shown results that exceed all expectations, creating a ... read Outforz reviews & insights

Keymakr provides image and video data annotation, along with data creation, collection, and validation services for AI and machine learning computer vision projects of any scale. The company’s core expertise lies in delivering high-quality training data for multimodal and embodied AI systems, and supporting human-verified annotation and LLM ground-truth validation of model outputs. Keymakr's motto, ... read Keymakr reviews & insights

Need high-quality training data for your machine learning models? Look no further! Our team of experienced annotators provide accurate and consistent labeling, making your data more valuable than ever.Get the best of both worlds with our human-in-the-loop services. Our team of experts will work alongside your automated processes to complement its scalability with human intelligence.

High-quality training data and data collection is essential for all large language models, whether you build the data yourself, use a dataset from Sapien, or pre-existing models. A human-in-the-loop labeling process delivers real-time feedback for fine-tuning datasets to build the most performant and differentiated AI models.We provide precise data labeling with faster human input to ... read Sapien reviews & insights

DVL empowers businesses to mitigate the risk of non-compliance and strive towards a safe & high-quality workplace by automating human observation-based process inspection. Artificial intelligence (AI) and machine learning (ML) determine new approaches to business models that require large amounts of data. Choose the best computer vision data annotation outsourcing service and save money and ... read Data Vision reviews & insights

We are a Kyiv-based data annotators and labelers provider that helps your business take full advantage of Artificial Intelligence. We specialize in hiring data annotation professionals for companies from various industries with headquarters across multiple countries. So rest assured that your AI models and Machine Learning algorithms will be trained with high-quality labeled data. Since ... read My Data Annotation reviews & insights

We are one of the most reliable and specialized providers of remote Artificial Intelligence (AI) data labeler and data annotator professionals based in Kyiv, Ukraine. Our professional-level services help to meet the custom needs of your business. We offer highly cost-efficient and skill-oriented data annotation services to enterprises across the globe.

Lumina Datamatics is a trusted partner in providing Content Services, Retail Support Services, and Technology Solutions to several global companies in the Publishing and Retail industries worldwide. We are amongst the largest service providers in this space and our customers include 8 of the 10 largest Publishers & 3 of the 5 largest Retailers / ... read Lumina Datamatics reviews & insights

Get Annotator is the first platform purpose-built to help you hire data annotators every month—no middlemen, no delays, no guesswork. We simplify AI development by matching startups, research teams, and enterprises with skilled annotators aligned to your tools, domain, and project goals. Whether you're training a computer vision model or fine-tuning NLP pipelines, our ready-to-deploy ... read GetAnnotator reviews & insights

Dserve AI is a Data-as-a-Service (DaaS) company specializing in AI dataset creation, data annotation, and data validation for machine learning and computer vision applications. We help AI teams build reliable models by delivering accurate, scalable, and high-quality labeled datasets across multiple domains including Computer Vision, Healthcare AI, Conversational AI, Generative AI, AI Agents, Biometric AI, ... read Dserve AI reviews & insights

Annotation Box provides high-quality and accurate data annotation services for training AI and Machine Learning models. We offer a wide range of services, including image, video, audio, and text annotation, to help businesses and organizations improve their machine-learning models. With a team of experienced annotators and state-of-the-art technology, we ensure timely delivery and exceptional results ... read Annotation Box reviews & insights

Anolytics provides a high-quality and low-cost annotation service for the construction of machine learning and artificial intelligence models. It uses multiple annotation techniques to provide accurately annotated data in text, photos, and videos while assuring correctness and quality. It is highly accurate in the image, video, and text annotation . Anolytics offers all effective data ... read ANOLYTICS reviews & insights

iMerit combines the technologies, talent and techniques that, together, deliver AI data solutions that companies rely on. Learn more about iMerit and our leadership team here.Our customers are able to focus on the algorithms that drive their company forward, while our teams of trained specialists handle the data work and reinforcement learning. With an output ... read iMerit reviews & insights

Frinksyn bring together the best people, processes, and technologies to deliver exceptional quality data services. We partner with your vision to understand your requirements while assuring to be agile and flexible for your evolving data needs.Our full-time expert workforce undergoes specialized training and has vast annotation experience in different domains. Frinksyn Architects draw upon their ... read Frinksyn reviews & insights