Buyer Eval — The Rotten Tomatoes of B2B Software

A free, open-source Claude skill that evaluates B2B vendors by talking to their AI agents, cross-referencing every claim against independent sources, and scoring what's verified vs. what's just optimistic marketing.

New in v3.5 — Vendor questions are now captured even when no Company Agent exists. Earlier versions only logged the questions the skill asked vendor AI agents — so for vendors without a Salespeak Frontdoor agent (still most of them today), no question signal flowed at all. v3.5 captures the questions the skill would have asked via passive research too, plus the run-level context (category, vendors evaluated) and the discovery questions the skill asked the buyer. Privacy surface is unchanged from v3.4 — no buyer text, no buyer-derived tags, no answers. Existing consented users keep flowing data with no re-consent.

"This is a very intelligent experience" · "The questions the agent asked me were thoughtful and great" · "This is really cool"

Watch it in action (60 seconds)

https://github.com/salespeak-ai/buyer-eval-skill/releases/download/v3.1.1/buyer-eval-demo.mp4

How it works

You type a vendor's name. The skill does everything a great analyst would do — except in 30 minutes instead of 3 weeks:

1. Researches your company — industry, size, tech stack, maturity — so you don't fill out a form
2. Asks domain-expert questions that surface hidden requirements you didn't know to mention
3. Talks to vendor AI agents directly through the Salespeak Frontdoor API — structured due diligence conversations, not web scraping
4. Cross-references every claim against G2, Gartner, analyst reports, press, and LinkedIn — plus Salesforce AgentExchange / AppExchange for Salesforce-ecosystem vendors — so you see what's confirmed vs. unverified
5. Scores vendors across 7 dimensions with transparent evidence tracking
6. Delivers a comparative recommendation with scorecards, hidden risk analysis, and demo prep questions tailored to each vendor's gaps

No API key needed. No account needed.

Works out of the box for any vendor. For vendors with a Salespeak Company Agent, evaluations include vendor-verified evidence from direct AI agent conversations. Without one, the skill searches for other available company agents and, if none are found, uses independent sources only. You always see which evidence basis each score is built on.

What you get

For a mid-market SaaS company evaluating customer success platforms: Gainsight is the strongest fit for teams that need deep analytics and enterprise-grade health scoring, but comes at a premium. ChurnZero wins on time-to-value and usability for teams under 50 CSMs. Key open item: Gainsight's implementation timeline claims (6 weeks) are unverified — ask for customer references in your size band.

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