What happened to Appen?
discontinued The registry marked Appen discontinued on 2026-09-01: its check failed three consecutive times. Last successful sync: 2026-08-20.
Appen provides high-quality, scalable data for AI models and applications. They offer an end-to-end platform, flexible services, and deep expertise to ensure the delivery of diverse data crucial for building foundation models and enterprise-ready AI applications. Appen supports the AI lifecycle by providing software to collect, curate, fine-tune, and monitor traditionally human-driven tasks, creating efficiencies through a trustworthy process. They offer AI training data, data annotation, data collection, LLM training data & services, multilingual AI, evaluation & benchmarking, supervised fine tuning, and off-the-shelf datasets.
Live alternatives
No active same-category alternatives in the registry yet. The tools index carries everything else that is live.
How this was decided
Not an editorial call. Appen's check failed three syncs in a
row, and the 3-miss rule marks it
discontinued automatically. If the vendor page comes back, the
registry restores it on its own: warn first, then
active. Both directions are recorded as events.