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Best Signs of AI Alternatives in 2026

Updated

20 platforms from AI content detection software ranked against Signs of AI on the same published basis.

  1. 1
    GPTZero Free plan apiextensionWeb $8.33/mo7.6
    Signs of AI vs GPTZero
  2. 2
    Polygraf AI Detector Free plan apiextensionWeb $9.95/mo7.6
    Signs of AI vs Polygraf AI Detector
  3. 3
    AI Detector Pro Free plan Web Free7.5
    Signs of AI vs AI Detector Pro
  4. 4
    Winston AI Free plan apiextensionWeb $5/mo7.5
    Signs of AI vs Winston AI
  5. 5
    Pangram Free plan apiextensionWeb $1.67/mo7.4
    Signs of AI vs Pangram
  6. 6
    Proofademic Free plan apiWeb $15/mo7.4
    Signs of AI vs Proofademic
  7. 7
    TrustOriginality.ai Free plan AndroidapiiOSWeb €4.99/mo7.4
    Signs of AI vs TrustOriginality.ai
  8. 8
    Ahrefs Free plan apiWeb $29/mo7.1
    Signs of AI vs Ahrefs
  9. 9
    AI or Not Free plan apiiOSWeb $5/mo7.0
    Signs of AI vs AI or Not
  10. 10
    Hive AI-Generated Content Detection Free plan apiextensionself-hostedWeb $6/mo7.0
    Signs of AI vs Hive AI-Generated Content Detection
  11. 11
    Reality Defender Free plan apiself-hostedWeb $33.25/mo7.0
    Signs of AI vs Reality Defender
  12. 12
    TraceGPT Free trial apiextensionWeb 7.0
    Signs of AI vs TraceGPT
  13. 13
    Trinka Free plan apiextensionMacself-hostedWeb 7.0
    Signs of AI vs Trinka
  14. 14
    Compilatio AI Detector Free trial apiWeb 6.9
    Signs of AI vs Compilatio AI Detector
  15. 15
    Copyleaks AI Detector Free trial apiextensionWeb $1.17/mo6.9
    Signs of AI vs Copyleaks AI Detector
  16. 16
    Detecting-AI.com Free plan apiWeb $0.58/mo6.9
    Signs of AI vs Detecting-AI.com
  17. 17
    Detecto Free plan Web $6.99/mo6.9
    Signs of AI vs Detecto
  18. 18
    DuckDuckGoose DeepDetector Free trial apiself-hostedWeb 6.9
    Signs of AI vs DuckDuckGoose DeepDetector
  19. 19
    GPTKit Free plan apiWeb $5/mo6.9
    Signs of AI vs GPTKit
  20. 20
    Humbot Free trial apiWeb $0.67/mo6.9
    Signs of AI vs Humbot

Signs of AI alternatives compared

#PlatformScoreFree planFromRuns on
1GPTZero7.6Free plan$8.33/moAPI, Browser, Web
2Polygraf AI Detector7.6Free plan$9.95/moAPI, Browser, Web
3AI Detector Pro7.5Free planFreeWeb
4Winston AI7.5Free plan$5/moAPI, Browser, Web
5Pangram7.4Free plan$1.67/moAPI, Browser, Web
6Proofademic7.4Free plan$15/moAPI, Web
7TrustOriginality.ai7.4Free plan€4.99/moAndroid, API, iOS, Web
8Ahrefs7.1Free plan$29/moAPI, Web
9AI or Not7.0Free plan$5/moAPI, iOS, Web
10Hive AI-Generated Content Detection7.0Free plan$6/moAPI, Browser, self-hosted, Web
11Reality Defender7.0Free plan$33.25/moAPI, self-hosted, Web
12TraceGPT7.0API, Browser, Web
13Trinka7.0Free planAPI, Browser, Mac, self-hosted, Web, Windows
14Compilatio AI Detector6.9API, Web
15Copyleaks AI Detector6.9$1.17/moAPI, Browser, Web
16Detecting-AI.com6.9Free plan$0.58/moAPI, Web
17Detecto6.9Free plan$6.99/moWeb
18DuckDuckGoose DeepDetector6.9API, self-hosted, Web
19GPTKit6.9Free plan$5/moAPI, Web
20Humbot6.9$0.67/moAPI, Web
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Questions about Signs of AI alternatives

What is the best alternative to Signs of AI?

GPTZero, number 1 in AI content detection software with a score of 7.6 out of 10. The others here: Polygraf AI Detector, AI Detector Pro, Winston AI and 16 more.

What is the best free alternative to Signs of AI?

GPTZero is the best-ranked alternative with a free plan. 15 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.