ProofWrite vs Undetectable AI

ProofWrite

ProofWrite is built around one specific job: getting AI-written text past detection tools while keeping the meaning intact, verified against a stated list of detectors rather than a vague claim. The catch is that detector behavior changes over time, so passing today's check doesn't guarantee it holds up against a future detector update, and 250 free words isn't much to evaluate quality on your own text.

Pros

• +checks output against seven named detectors rather than just one
• +eight writing modes for different tones, including academic, formal, and blog
• +free tier and no-card signup to test before paying

Cons

• −detector-passing behavior can change whenever those detectors update their models
• −only 250 free words to evaluate before hitting a paywall
• −unlimited-word tier requires the top Ultra plan

Undetectable AI

Buy it only if you accept that passing a detector is a moving target: detector vendors retrain constantly, and text that cleared last month can flag next month. As a multi-format detection dashboard it is more defensible than as a bypass tool.

Pros

• +Detector and rewriter run in one pass, so you see which sentences changed and why
• +Coverage extends past text into image, voice, video and document classifiers
• +Browser extension works inside Docs and Gmail rather than a separate tab
• +Entry tier is genuinely cheap at annual rates

Cons

• −Rewrites often flatten voice and add filler to break statistical patterns
• −Detection on short passages is unreliable in both directions
• −Word quotas drain fast because rejected attempts still consume them
• −The free trial caps at 250 words, barely enough to judge output quality

Is ProofWrite cheaper than Undetectable AI?

Both publish the same entry price, $9.99/mo. The difference is what each plan includes, which the fact table above sets side by side.

Does ProofWrite or Undetectable AI have a free tier?

Both: ProofWrite has a free tier, and Undetectable AI has a free tier.

Which has a public API, ProofWrite or Undetectable AI?

Undetectable AI ships a public API, as of our last verification. A public API for ProofWrite is not confirmed by us — check its developer docs before you plan an integration.