Spec

Spec is an adaptive AI Product Manager Agent for founders and indie hackers. It turns a short product idea into an engineering-ready product spec, and its workflow is built around a 10-step discovery pipeline rather than a single prompt or static template.

The pipeline runs through strategy planning, JTBD, HMW, Lean Canvas, market sizing, competitor analysis, persona simulation, assumption mapping, canvas revision, and Shape Up PRD generation. Spec says it adapts the depth and scope of this process to the product type, and it can classify products such as SaaS, hardware, game, fintech, healthtech, and more than 20 additional categories. It also describes itself as agentic rather than assistive: before research begins, it classifies the product, sets research depth, and activates domain-specific modules automatically. The research phase includes market sizing, competitor scraping, and multi-persona simulation with Van Westendorp pricing analysis, and the output is revised after market and competitor research to reflect those findings.

Several features are specifically named. Spec uses Firecrawl to deep-scrape competitor websites and Tavily to search market data. It generates competitor comparison matrices with MATCH, DIFFERENTIATE, and LEAPFROG decisions, and it includes pricing, features, positioning gaps, and region-aware scope adjustments. It also produces a structured Markdown PRD that is formatted for AI coding tools and can include data models, API specs, user stories, acceptance criteria, and explicit scope boundaries. The process includes human approval points at JTBD validation and the final PRD, where the user can review, edit, or regenerate before the agent continues.

Spec is delivered as a web product with sign-in and project management pages, and it offers a free start with no credit card required. The page also says users can view pricing and start a first project in seconds. The tool is described as built for founders and indie hackers in the Vibe Coding era.