A GPTZero API alternative for developers
GPTZero, Originality.ai, Copyleaks and ZeroGPT all offer AI-detection APIs. If you are comparing options, this page lists what the TextSight API gives developers so you can decide for yourself.
What the TextSight API includes
| Feature | TextSight API |
|---|---|
| AI detection with sentence-level scores | POST /v2/detect |
| Lightweight score-only check | POST /v2/score |
| AI humanizer (rewrite) in the same API | POST /v2/rewrite, 5 tones, strength 1-5 |
| Official open-source SDKs | Python (pip install textsight) and JavaScript/TypeScript |
| Max text per request | 50,000 characters |
| No-code integration | Zapier |
Pricing, quotas and rate limits change, so check the TextSight pricing page and each competitor's own site for current numbers.
Why teams switch
The most common reason is wanting detection and rewriting in one API: flag the AI-sounding sentences, then rewrite only those, without a second vendor. The other is accuracy on real-world text; TextSight publishes its research on text length and false positives.
Switching takes a few lines
from textsight import TextSight
ts = TextSight()
result = ts.detect(document_text)
ai_sentences = [s["text"] for s in result["sentences"] if s["label"] == "ai"]For a non-developer comparison, see GPTZero alternative, Is GPTZero accurate?, Originality.ai alternative and Copyleaks alternative.
FAQ
What is a good alternative to the GPTZero API?
Common options are the TextSight, Originality.ai, Copyleaks and ZeroGPT APIs. TextSight combines AI detection with a humanizer endpoint and has open-source Python and JavaScript SDKs.
Does TextSight have an API for AI detection?
Yes. The TextSight API v2 has detect, score and rewrite endpoints. Docs are at textsight.ai/api-docs.html.
Can one API both detect and humanize AI text?
Yes. TextSight offers both in the same API, so you can flag AI-sounding sentences and rewrite them with one key.