PQAI vs Stiltn

PQAI is an AI-powered patent search platform intended to help find prior art relevant to an invention. Searchers can describe an idea in natural language without special formatting or technical expertise. Its tools include semantic search, CPC Classification Prediction, Technical Concept Extraction, Patent Data Retrieval, and claim analysis. The Free plan searches across 100M+ patents and returns 20 results per query at standard speed. PQAI+ offers 500 results per query, faster search, full-text excerpts, and export. The service is available on the web and through an API, and PQAI describes it as open source. API plans include MCP server access and compatibility with Claude, ChatGPT, and Gemini. PQAI also provides an iFrame embed with instructions for WordPress, Wix, and custom-built websites. The company says it erases each query from its servers after generating results. API requests use token-based authentication and HTTPS, alongside rate limiting and access controls. PQAI identifies individual inventors, law firms, patent examiners, enterprises, and R&D teams as users. Paid plans start at $20 a month; commercial integration into another product requires a commercial API or Enterprise plan.

Stiltn is an AI platform for patent practitioners, with tools for search, drafting, competitor monitoring, and portfolio assessment. Its semantic search covers more than 150 million patents and provides explanations and claim mapping. Drafting support includes invention disclosures, patent applications, claim generation, and office action responses. Monitoring follows patent filings and application changes, then classifies alerts by relevance. Portfolio analysis considers legal defensibility, economic value, and competitor activity to make recommendations. Stiltn says it covers more than 50 patent offices, including USPTO, EPO, WIPO, JPO, KIPO, and CNIPA. Bulk imports are available from PatSnap, Anaqua, CPA Global, and standard PAIR or Espacenet exports. Deployment options are cloud, private cloud, or on-premises, with EU or US processing and storage choices and configurable retention controls. The company says customer data is not used to train models, and AI outputs link to source documents. Evaluation access costs nothing and includes full platform access, dedicated onboarding, and custom configuration; pricing beyond evaluation is on request.