# bumble-tech/private-detector

Bumble's Private Detector - a pretrained model for detecting lewd images

Repository: https://github.com/bumble-tech/private-detector
Canonical: https://ross.abutalabs.com/products/private-detector
Homepage: https://medium.com/bumble-tech/bumble-inc-open-sources-private-detector-and-makes-another-step-towards-a-safer-internet-for-women-8e6cdb111d81
Language: Python
License: Apache-2.0
License Family: permissive
Topics: bumble, efficientnet, image-classification, tensorflow
Last push: 2023-11-05T22:14:36+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 1432, "days_push": 1032, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1352, forks 95 (observed 2026-08-28T04:04:28.509448+00:00)

## What it is
Bumble's Private Detector is a pretrained TensorFlow image classifier based on EfficientNet-v2 that detects lewd images. The repo provides the SavedModel, checkpoint, inference scripts, and finetuning instructions.

## Use cases
- detect lewd images in user uploads
- filter unsolicited explicit photos in a chat app
- moderate user-generated images
- finetune an NSFW image classifier on my own data
- deploy a pretrained image classifier with TensorFlow Serving

## When to choose
- you need a ready-made pretrained model for detecting explicit images
- you want to finetune an existing lewd-image classifier on your own dataset
- you want to deploy via TensorFlow Serving

## When to avoid
- you need general NSFW detection beyond lewd images - the model is trained on a specific internal dataset
- you need a non-Python/TensorFlow stack without conversion work
- you need actively developed features - the project appears to be in maintenance

## Facets
- artifact type: library
- maturity: maintenance
- function: machine-learning, image-processing, computer-vision
- domain: machine-learning, image-processing, privacy, security
- platform: python, cross-platform
- tags: pretrained-model, image-classification, efficientnet, tensorflow, content-moderation, nsfw-detection

## Member repositories
- bumble-tech/private-detector (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:28.509448+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:42:08.395021+00:00, confidence not recorded.
  - readme: https://github.com/bumble-tech/private-detector (fetched 2026-08-28T04:04:28.509448+00:00, sha a9d77474d743)
- Data as of 2026-08-30T08:39:29.467469+00:00.