> For the complete documentation index, see [llms.txt](https://docs.seldon.ai/alibi-detect/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.seldon.ai/alibi-detect/outlier-detection/methods.md).

# Methods

- [Mahalanobis Distance](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/mahalanobis.md)
- [Isolation Forest](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/iforest.md)
- [Variational Auto-Encoder](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/vae.md)
- [Auto-Encoder](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/ae.md)
- [Variational Auto-Encoding Gaussian Mixture Model](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/vaegmm.md)
- [Auto-Encoding Gaussian Mixture Model](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/aegmm.md)
- [Likelihood Ratios for Outlier Detection](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/llr.md)
- [Prophet Detector](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/prophet.md)
- [Spectral Residual](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/sr.md)
- [Sequence-to-Sequence (Seq2Seq)](https://docs.seldon.ai/alibi-detect/outlier-detection/methods/seq2seq.md)