# FLUX by Black Forest Labs vs ImgAuth

> FLUX by Black Forest Labs: Image and video generation models with a pay-per-use API and open weights
> ImgAuth: Check documents for tampering and images for AI-generation signals with heatmap evidence

- FLUX by Black Forest Labs profile: https://finderatlas.com/tools/flux-ai
- ImgAuth profile: https://finderatlas.com/tools/imgauth
- Comparison page: https://finderatlas.com/compare/flux-ai-vs-imgauth
- Last reviewed: October 2026

## Verdict

FLUX by Black Forest Labs and ImgAuth are both Image & Visual AI tools. FLUX by Black Forest Labs scores higher in FinderAtlas's editorial review (8.3 vs 7.3 out of 10), led by value for money. Only ImgAuth has a free plan or trial.

### Choose FLUX by Black Forest Labs if

- You want a tool built for adding image generation or editing to an application through an API.
- Pay-per-use pricing with no subscription or seat fees.
- Klein models start at $0.008 per image.

### Choose ImgAuth if

- You want a tool built for triage of invoices, receipts, certificates and claim documents, and quick whole-image AI-generation checks as one input to a human review.
- Focused on two clear tasks, document tampering and AI-generated image detection.
- Heatmaps and suspicious-region outputs give reviewers something to check, instead of a bare score.

## Pricing

| | FLUX by Black Forest Labs | ImgAuth |
| --- | --- | --- |
| Pricing model | Paid | Free trial |
| Free plan or trial | No | Yes |
| Starting price | $0.008 | $0 |

## Features

| Feature | FLUX by Black Forest Labs | ImgAuth |
| --- | --- | --- |
| FLUX 3 Image | Yes | Not listed |
| FLUX 3 Video | Yes | Not listed |
| FLUX 3 Image Klein | Yes | Not listed |
| FLUX.2 family | Yes | Not listed |
| FLUX.1 Kontext | Yes | Not listed |
| FLUX Tools | Yes | Not listed |
| FLUX 3 Action | Yes | Not listed |
| Playground | Yes | Not listed |
| Open weights | Yes | Not listed |
| Document fraud detection | Not listed | Yes |
| Heatmap evidence | Not listed | Yes |
| AI Image Detector | Not listed | Yes |
| Real or AI Face | Not listed | Yes |
| REST API | Not listed | Yes |
| Referral credits | Not listed | Yes |
| Privacy handling | Not listed | Yes |
| Multilingual site | Not listed | Yes |

## Platforms

| Platform | FLUX by Black Forest Labs | ImgAuth |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | No |
| Android | No | No |
| API | Yes | Yes |
| Browser Extension | No | No |

## FLUX by Black Forest Labs strengths

- Pay-per-use pricing with no subscription or seat fees
- Klein models start at $0.008 per image
- One API covers image, video, audio and action models
- Open weights available for selected models, with commercial licence tiers for self-hosting
- Company holds SOC 2 Type II and ISO 27001:2022 certifications, according to its site

## FLUX by Black Forest Labs limitations

- The pricing page mentions no free tier or free credits
- Commercial licence prices are not published and require Contact Sales
- Open weights come under several licences, and some are non-commercial
- No mobile app

## ImgAuth strengths

- Focused on two clear tasks, document tampering and AI-generated image detection
- Heatmaps and suspicious-region outputs give reviewers something to check, instead of a bare score
- Free 3-credit trial with no card, and cancellation at any time with access until period end
- REST API for higher-volume and team workflows
- Candid limitations: outputs are described as review signals, with explicit scope boundaries

## ImgAuth limitations

- No published accuracy figures or independent benchmarks
- Not a deepfake, face-swap, liveness or identity tool, and the site's wording on face-swap detection is inconsistent
- 10 MB file limit and no free ongoing tier after the 3 trial credits
- Mobile app is only announced, with an outdated launch estimate (Q2 2025) on the site
- Operating company is named only as ImgAuth Ltd, with no team or founding details published

## FAQ

**Is FLUX by Black Forest Labs better than ImgAuth?**

It depends on your workflow. FLUX by Black Forest Labs is built for adding image generation or editing to an application through an API. ImgAuth is built for triage of invoices, receipts, certificates and claim documents, and quick whole-image AI-generation checks as one input to a human review.

**What are the key feature differences between FLUX by Black Forest Labs and ImgAuth?**

FLUX by Black Forest Labs: Image and video generation models with a pay-per-use API and open weights. ImgAuth: Check documents for tampering and images for AI-generation signals with heatmap evidence.

**Does FLUX by Black Forest Labs or ImgAuth have a free plan?**

ImgAuth has a free plan or trial; FLUX by Black Forest Labs is paid only.

**Which is cheaper, FLUX by Black Forest Labs or ImgAuth?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.