Polygraf AI Detector

Overview

Polygraf AI Detector checks whether content was created or manipulated by AI and helps reviewers examine the result. It is best suited to organizations that need explainable, auditable checks and related provenance tools. Its appeal is tempered by support for one language and a free allowance of 2.5K tokens a month.

Key features

Polygraf gives AI-versus-human probability scores, confidence scores, and evidence, and can identify models including ChatGPT, Gemini, and Claude. One-click verification makes the result easier to review and audit than a bare classification. That context helps teams investigate a flag, but does not make a probability score a substitute for human judgment.

The product page says analyses are private and submitted data is not stored or reused. Polygraf says the detector is built for GDPR, FERPA, CCPA, and enterprise audit requirements; the company also lists ISO/IEC 27001:2022 and SOC 2 Type I and Type II certifications. These are relevant assurances for organizations handling sensitive content. Its claim of 20–35% higher detection accuracy and faster performance than leading tools is a company claim, not an independent comparison.

Data Provenance tools are included in all plans: AI highlighting, copyright and plagiarism detection, humanized-text detection, writing analysis, and synthetic voice detection. This broader set suits teams checking more than AI-written text, though the single supported language limits its reach for multilingual workflows.

Polygraf offers a Chrome extension, APIs, and native integrations with ChatGPT/OpenAI, Microsoft Copilot, Google Gemini, Anthropic Claude, and AWS Bedrock. Some cloud-dependent integrations need an internet connection and will not work in air-gapped deployments. The company describes its AI as locally run, zero-trust, and deployable on-premises or air-gapped within an organization’s infrastructure, a potentially useful fit for regulated environments; it also serves organizations in defense, finance, healthcare, and government.

Pricing

The Free plan costs nothing and includes 2.5K monthly tokens, roughly 2K words. It is enough for occasional checks, but a small allowance for regular review. Standard costs $9.95 a month, billed monthly, for 150K tokens (about 135K words); it is the more practical tier for an individual or small team with steady use. Premium costs $49.95 a month, billed monthly, and raises the allowance to 1M tokens (about 900K words), better suited to heavier workloads. All plans include Data Provenance tools. The retail pricing page also describes a $10-per-month Basic plan with basic chat and email support; it does not establish how that plan relates to the Free, Standard, and Premium tiers.

Platforms

Polygraf supports web, API, and extension use, with file uploads and API access. The consumer detector is offered as a Chrome extension. The company also invites visitors to request a demo, which is the route to explore organizational deployment and integrations.

Who it's for

Choose Polygraf if your organization needs evidence-backed content checks, verification, and related provenance tools, especially in a regulated setting or within an existing integration workflow. It is a weaker fit for multilingual review or anyone whose volume regularly exceeds the free quota but cannot justify a paid monthly plan.

Pros and cons

Pro: Probability scores, model identification, evidence, and one-click verification give reviewers several ways to examine a result.

Pro: Provenance tools across all plans broaden its use beyond AI-content detection.

Pro: API access, integrations, and on-premises or air-gapped deployment address organizational workflows and tighter environments.

Con: One supported language rules it out for many multilingual teams.

Con: The free plan’s 2.5K-token monthly cap is restrictive for recurring review.

Con: Some cloud-dependent integrations require internet access, so they cannot be used in an air-gapped deployment.

Alternatives

For a different mix of detection and platform support, compare AI Content Detection Software and AI Detection Software.

TrustOriginality.ai is worth considering if Android or iOS access matters; its free plan allows one text analysis per month. GPTZero has a free allowance of 10,000 words per month and supports API, extension, and web, making it an option for readers prioritizing a larger stated free word quota. Trinka is an alternative. Winston AI offers a 14-day trial with 2,000 credits, while Ahrefs is an alternative. AI Detector Pro has a free allowance of three AI scans per month. Pangram gives free users 2,000 words per day, image scans, file upload and OCR, and lists support for over 20 languages. Proofademic offers a free plan with 1,000 words, a three-day trial, multilingual detection, plagiarism checking, and report export.

Verdict

Polygraf is a strong choice for organizations that value explainable, auditable detection alongside provenance tools, API integrations, and deployment options for regulated environments. Look elsewhere if multilingual coverage or a larger free allowance is essential.