What differs
- Listing: Appen is listed on the ASX (APX); Innodata is listed on Nasdaq (INOD).
- Preference work: Appen describes SME RLHF with expert preference rankings and comparative evaluations; Innodata describes Human Preference Optimization covering RLHF and DPO, with feedback from thumbs up/down and rating scales to nominal classifications.
- Other post-training data: Appen lists SFT demonstrations, chain-of-thought traces, red teaming, agent trajectories, and RL environments; Innodata lists SFT datasets, benchmarks, safety evaluation and red teaming, and off-the-shelf datasets.
- Published security: Appen states SOC 2 and ISO 27001 certification and SOC 2 Type II attestation; we found no certification on the Innodata pages checked.
Who each tends to fit
Teams that need both RLHF and DPO-ready data described in one service may look at Innodata’s HPO page. Teams that need SOC 2 and ISO 27001 evidence up front, or many locales, may look at Appen. Request security documentation from both.
Last checked: . No winner declared.