Appen records 665,840 monthly visits with +0.2% month-over-month growth and Contact for Pricing pricing. Custom.MT records 4,535 monthly visits with -48.8% growth and Contact for Pricing pricing.
Human-validated training data and evaluation services for frontier AI models
Machine translation and GenAI localization for enterprise language teams
| Dimension / Metric | | |
|---|---|---|
| Official Domain | appen.com | custom.mt |
| Pricing Model | Contact for Pricing | Contact for Pricing |
| Monthly Visits | 665.84K (665,840) | 4.54K (4,535) |
| MoM Traffic Delta | +1.1K (+0.2%) | -4.32K (-48.8%) |
| Primary Market & Share | 🇺🇸 United States (22%) | 🇺🇸 United States (66.1%) |
| Direct Visits / mo | 238.31K | 1.78K |
| User Rating | 4.4 | 4 |
| Supported Platforms | Website | Website |
Human-validated training data and evaluation services for frontier AI models
Chain-of-thought reasoning traces, SME-level RLHF, supervised fine-tuning demonstrations and adversarial red teaming for the most capable models.
Golden trajectories, RL environment design, failure-mode taxonomies and software-engineering-driven deep evaluation for autonomous agents.
Multilingual ASR and conversational speech data, expressive TTS annotation, vision-language model training data, video action labelling and voice-agent evaluation.
LiDAR point-cloud labeling, multi-camera sensor fusion, robot demonstration trajectories, world-model rollouts and embodied interaction logs.
Machine translation and GenAI localization for enterprise language teams
Manage stock engines and your own custom models from one console, then push them into the linguistic tools your team already works in.
Compare DeepL, Google, GPT-class and custom models with BLEU, WER and COMET scores plus sample segments to find the best engine per language pair.
Fine-tune translation models on your terminology, style guides and past translations to cut edit distance and post-editing cost.
Plugins and extensions for Trados, Smartling, memoQ, XTM Cloud, Smartcat and Shopware keep MT inside existing localization workflows.
Free / Open-sourceEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
Free / Open-sourceEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.
Free / Open-sourceProfessional AI translation for text, documents, images and audio
Free / Open-sourceProfessional AI translation for text, documents, images and audio
Combines robust data labeling tools with automated workflows, but focuses more on software tooling than managed human workforces.
Combines robust data labeling tools with automated workflows, but focuses more on software tooling than managed human workforces.
On-premise translation and speech recognition for enterprises
On-premise translation and speech recognition for enterprises
Free / Open-sourceAI-powered localization and translation platform for global content
Free / Open-sourceAI-powered localization and translation platform for global content
Provides enterprise-grade AI training data and model evaluation at massive scale, but often with higher enterprise pricing.
Provides enterprise-grade AI training data and model evaluation at massive scale, but often with higher enterprise pricing.
Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
Free / Open-sourceFree AI translator that cross-checks 22 models for one trusted translation
Free / Open-sourceFree AI translator that cross-checks 22 models for one trusted translation
SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistThe multimodal data layer for computer vision and physical AI teams
SpecialistThe multimodal data layer for computer vision and physical AI teams
