A quick comparison without pretending any objectivity
| Open Source | Commercial / Restricted Access | Web | Upper Limit Images | Speed | Sensitivity | Specificity | Comment | |
|---|---|---|---|---|---|---|---|---|
| Image Verification Assistant | N | N | Y | 1 | * | * | * | |
| Forensically | N | N | Y | 1 | *** | * | * | |
| FotoForensics | N | N | Y | 1 | ** | * | * | |
| Imagedup | N | N | Y | >500 | *** | * | * | proof of principle |
| ImageTwin | N | Y | Y | 10 | *** | ** | ** | |
| Lpixel | N | Y | Y | 50? | ? | ? | ? | |
| Proofig | N | Y | Y | 50? | * | */** | */** | |
| Droplets | Y | N | N | 1 | * | * | * | |
| ImageJ | Y | N | N | 1 | ? | ? | ? | |
| Sherloq | Y | N | N | 1 | NA | NA | NA | toolbox |
| figcheck | N | N | Y | 1 | ? | ? | ? | scam? |
| BioVoxxel | Y | N | N | 1 | ? | ? | ? | toolbox |
I believe that all services should be in the open domain while bulk or routine data processing could be a business model.