This Image Does Not Exist vs Substack’s new tool tells you who’s been writing their newsletters with AI: Which AI Content Detection Tool Is Better for educators & trainers?
This Image Does Not Exist (Test your ability to spot AI-generated images.) and Substack’s new tool tells you who’s been writing their newsletters with AI (Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift towar) are two of the most-used AI Content Detection in our directory. This breakdown compares their pricing, free tier, API access, popularity, and verified ratings side by side so you can shortlist the right fit.
This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI both appear in AI Content Detection. This Image Does Not Exist focuses on Journalists and content verifiers learning to spot deepfakes. Substack’s new tool tells you who’s been writing their newsletters with AI focuses on Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift towar.
This comparison explains who should choose each tool, how they differ on pricing, API fit, enterprise readiness, and security — with a clear recommendation for common buyer scenarios.
Quick Verdict
Best overall
Best for beginners
Best free option
Choose the right tool
Choose This Image Does Not Exist if
- You need educators & trainers
- You need ai researchers
- You need content moderation teams
- You prefer a consumer-friendly product experience
- Your primary job is journalists and content verifiers learning to spot deepfakes
Avoid if
- You primarily need limited educational explanation of detection techniques
- You primarily need image quality variations make some too obvious to guess
- You primarily need no difficulty levels or progressive challenge options
Choose Substack’s new tool tells you who’s been writing their newsletters with AI if
- You prefer a consumer-friendly product experience
- Your primary job is substack is giving readers a way to estimate how much of a newsletter was written by ai, signaling a broader shift towar
Deep Comparison
Decision factors
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| Primary use case | Journalists and content verifiers learning to spot deepfakes | Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift towar |
| Target user | Educators & Trainers, AI Researchers, Content Moderation Teams | Individuals, Teams exploring AI tools |
| Best for | Educators & Trainers, AI Researchers, Content Moderation Teams | See tool page |
| Not ideal for | Limited educational explanation of detection techniques, Image quality variations make some too obvious to guess, No difficulty levels or progressive challenge options | — |
Pricing & access
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| Pricing model | Free with free tier | Freemium with free tier |
| Free tier | Yes | Yes |
Technical fit
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| API access | No | No |
| Automation fit | 2/10 | 2/10 |
Enterprise & security
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| Enterprise readiness | 2/10 | 2/10 |
User experience
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| Beginner friendly | 9.5/10 | 8/10 |
| Data depth | 5.6/10 | 4/10 |
Community signals
| Dimension | This Image Does Not Exist | Substack’s new tool tells you who’s been writing their newsletters with AI |
|---|---|---|
| Popularity score | 64 | 51 |
| Editorial rating | 8.8 / 10 | 8.7 / 10 |
| Last verified | 2026-06-24 | Not verified |
Pricing Decision
Both use a similar model. This Image Does Not Exist is the stronger starting point if you need a free tier to evaluate the product.
This Image Does Not Exist
- Solo / individual
- Free with free tier
Substack’s new tool tells you who’s been writing their newsletters with AI
- Solo / individual
- Freemium with free tier
API & Integrations
Neither tool emphasizes public API access — both are better suited to direct end-user workflows.
Security & Compliance
Enterprise readiness is limited or not the primary positioning for either tool — verify SSO, compliance, and admin controls on vendor sites.
Neither tool publishes verified enterprise controls (SOC 2, HIPAA, SSO, audit logs). Confirm directly with the vendor before assuming compliance.
Workflow fit
For most AI Content Detection buyers, start with This Image Does Not Exist, then validate pricing and integrations against your stack.
Pros and cons
This Image Does Not Exist
Teams and individuals who need journalists and content verifiers learning to spot deepfakes.
Strengths
- Free access with no account or signup required
- Immediate feedback on each guess to learn patterns
- Uses real StyleGAN and Stable Diffusion generated images
- Tracks accuracy score across multiple rounds
Weaknesses
- Limited educational explanation of detection techniques
- Image quality variations make some too obvious to guess
- No difficulty levels or progressive challenge options
Substack’s new tool tells you who’s been writing their newsletters with AI
Teams and individuals who need substack is giving readers a way to estimate how much of a newsletter was written by ai, signaling a broader shift towar.
Strengths
- See full tool page for strengths
Weaknesses
- No major weaknesses listed
Alternatives to This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI
Other AI Content Detection tools worth evaluating before you commit.
- Have I Been Trained?
Check if your images were used in AI training datasets.
- GPTZero
Detects AI-generated text and provides detailed writing analysis.
- Deezer’s new tool can identify AI music from Spotify, Apple Music, and others
Detects AI-generated music across Spotify, Apple Music, and other streaming platforms.
- Savi’s app aims to protect consumers from realistic AI scams like kidnappers demanding ransom
Detects AI-generated voice and video scams in real time.
- Advancing content provenance for a safer, more transparent AI ecosystem
Verify AI-generated content origins and detect synthetic media
Final Recommendation
We compared This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI across the five signals that actually move a ai content detection buying decision: pricing model, free-tier availability, public API surface, directory popularity, and verified user rating. On the basics they overlap: both offer a free tier and neither ships a public API today, which means the decision usually comes down to fit and trust signals rather than checkbox features.
This Image Does Not Exist carries a 8.8/10 rating with a popularity score of 64. Where it shines is educators & trainers and ai researchers. Substack’s new tool tells you who’s been writing their newsletters with AI carries a 8.7/10 rating with a popularity score of 51.
Bottom line: the headline specs are too close to call from data alone. Run the same prompt or task through each — the table above shows where the practical gaps live, and a 15-minute hands-on usually settles it.
Frequently Asked Questions
This Image Does Not Exist vs Substack’s new tool tells you who’s been writing their newsletters with AI: which should I try first?
Start with whichever matches your must-have: both have similar pricing signals, so try whichever has the workflow you'll lean on hardest.
How do This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI price?
This Image Does Not Exist is free; Substack’s new tool tells you who’s been writing their newsletters with AI is freemium. Both have a free tier.
Does This Image Does Not Exist or Substack’s new tool tells you who’s been writing their newsletters with AI expose a developer API?
Neither lists a public API in our directory — both are best used through their own UI for now.
Is This Image Does Not Exist better than Substack’s new tool tells you who’s been writing their newsletters with AI?
Neither is universally better — This Image Does Not Exist fits journalists and content verifiers learning to spot deepfakes, while Substack’s new tool tells you who’s been writing their newsletters with AI fits substack is giving readers a way to estimate how much of a newsletter was written by ai, signaling a broader shift towar. Pick based on your primary workflow.
Which tool is better for beginners?
This Image Does Not Exist is typically easier for beginners (free tier and onboarding signals). Substack’s new tool tells you who’s been writing their newsletters with AI may still work if you need advanced workflows.
Which tool is better for teams and enterprise?
This Image Does Not Exist shows stronger enterprise readiness signals. Verify SSO, compliance, and admin controls before procurement.
Does This Image Does Not Exist have API access?
This Image Does Not Exist does not emphasize public API access; it is oriented toward direct end-user use.
Does Substack’s new tool tells you who’s been writing their newsletters with AI have API access?
Substack’s new tool tells you who’s been writing their newsletters with AI does not emphasize public API access; it is oriented toward direct end-user use.
Which tool has a better free tier?
Both may offer free tiers — confirm current limits on each pricing page before production use.
What are the best AI Content Detection tools besides This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI?
Browse our AI Content Detection category hub and related comparisons below for alternatives with similar capabilities.
How do This Image Does Not Exist and Substack’s new tool tells you who’s been writing their newsletters with AI compare on pricing?
This Image Does Not Exist: Free with free tier. Substack’s new tool tells you who’s been writing their newsletters with AI: Freemium with free tier. Value depends on whether you need journalists and content verifiers learning to spot deepfakes vs substack is giving readers a way to estimate how much of a newsletter was written by ai, signaling a broader shift towar.
Which tool is better for automation and integrations?
This Image Does Not Exist scores higher for automation fit.
Related comparisons
- Deezer’s new tool can identify AI music from Spotify, Apple Music, and others vs Substack’s new tool tells you who’s been writing their newsletters with AI: Which Is Better?
- This Image Does Not Exist vs Advancing content provenance for a safer, more transparent AI ecosystem: Which Is Better?
- Savi’s app aims to protect consumers from realistic AI scams like kidnappers demanding ransom vs Substack’s new tool tells you who’s been writing their newsletters with AI: Which Is Better?
- Advancing content provenance for a safer, more transparent AI ecosystem vs Deezer’s new tool can identify AI music from Spotify, Apple Music, and others: Which Is Better?
- Advancing content provenance for a safer, more transparent AI ecosystem vs Savi’s app aims to protect consumers from realistic AI scams like kidnappers demanding ransom: Which Is Better?
- Deezer’s new tool can identify AI music from Spotify, Apple Music, and others vs Savi’s app aims to protect consumers from realistic AI scams like kidnappers demanding ransom: Which Is Better?
- GPTZero vs Advancing content provenance for a safer, more transparent AI ecosystem: Which Is Better?
- This Image Does Not Exist vs Savi’s app aims to protect consumers from realistic AI scams like kidnappers demanding ransom: Which Is Better?
Browse more in AI Content Detection tools.