Check your company context

Buyer Eval

Don't just compare vendors. Investigate the decision.

Buyer Eval is an open-source AI buying analyst. It checks what vendors claim, what the evidence actually supports, where important qualifications are hiding, and what you still need to get answered before you buy.

Run Buyer Eval View on GitHub

Most software comparisons compare features. Buyer Eval checks the evidence.

  • 01

    What the vendor claims

    Pricing pages, documentation, marketing material, product pages, and vendor AI agents.

  • 02

    What the evidence supports

    Specific documentation, independent sources, customer evidence, and buyer-provided evidence.

  • 03

    Where the story gets complicated

    Tier restrictions, add-ons, usage pricing, implementation requirements, contradictory sources, and important qualifications.

  • 04

    What you still need answered

    Questions that remain unresolved and could change the buying decision.

Evaluations

Published evaluations

Each one names its buyer scenario, shows every source with the date it was checked, and ends with the questions to get answered before you buy.

Brex vs Ramp vs Mercury Evidence checked September 28, 2026

The first finding: you may be comparing three different kinds of products.

They overlap on cards, payments, and finance operations, but banking, spend management, automation, and treasury play very different roles across the three.

See the evidence →
Slack vs Microsoft Teams Evidence checked September 30, 2026

We checked what the vendors say about each other. Some simple claims got complicated quickly.

AI packaging, agents, enterprise search, integrations, and Microsoft 365 bundling make the comparison more nuanced than a feature table suggests.

See the evidence →
Apollo vs ZoomInfo Evidence checked September 30, 2026

The most important question is also the hardest one to verify publicly: whose data is actually better for your market?

Pricing and capabilities are easy to compare. Data accuracy for your exact ICP is not, and public vendor claims do not settle it.

See the evidence →

Know these products? Challenge the evidence.

Buyer Eval is open source, and these evaluations are meant to improve as better evidence becomes available. If something is outdated, incomplete, or different in your experience, contribute a source or correction.

Contribute on GitHub

Why Salespeak built Buyer Eval

AI agents increasingly research companies on behalf of buyers. Buyer Eval is an open-source experiment in what happens when those agents investigate vendor claims rather than simply summarize websites. Learn about Salespeak