Tag Promptfoo

Evals & Testing

10 Best AI Agent Evaluation Tools in 2026, Open Source and Paid

Abstract amber agent path passing three checked nodes to a glowing goal ring, with a faded grey dropped branch, on navy

The 10 best AI agent evaluation tools for 2026, compared on trajectory and tool-call scoring, online evals, CI gates, self-hosting, and price, with a same-workload cost table and a tested CI example.

AgentStack Agent Engineering Desk
October 12, 2026

AgentStack is the operator’s manual for enterprise AI agents: sourced guides, comparisons and field notes for the AI, ops and product leaders who build, buy and run them.

TOPICS

AI Agents
Agent Frameworks
MCP & Agent Protocols
AgentOps
Workflow Automation
Copilots & AI Assistants
Enterprise AI Strategy
News & Analysis

COMPANY

About
Advertise
Editorial Standards
Write for Us
Contact

LEGAL

Disclosure
Privacy Policy
Cookie Policy
Terms of Service

Manage Consent

To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.

Functional Functional Always active

The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.

Preferences Preferences

The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.

Statistics Statistics

The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.

Marketing Marketing

The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.

Manage options
Manage services
Manage {vendor_count} vendors
Read more about these purposes

View preferences

{title}
{title}
{title}