Comparison

The AI Agent Index vs AI Agent Index

The AI Agent Index lands on Worth it, and AI Agent Index lands on Depends.

The AI Agent Index

theaiagentindex.com

Worth it

Confidence: Medium

Use it free to build a first AI-agent shortlist, then verify pricing and security with vendors directly.

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AI Agent Index

aiagentindex.mit.edu

Depends

Confidence: Medium

Use it if you research, procure, or govern AI agents and want free, documented capability and safety data.

Read the full report

The AI Agent Index versus AI Agent Index
Compare	The AI Agent Index	AI Agent Index
Verdict	Worth it	Depends
Best for	Teams shortlisting AI agents by function	AI safety and policy researchers
Who it's not for	Buyers needing thousands of verified reviews per product	Buyers wanting reviews, ratings, or pricing before choosing an agent
Privacy	No known public vulnerabilities found in the sources reviewed.^²	No known public vulnerabilities found in the sources reviewed.¹⁰
Support quality	No evidence in sources reviewed	Academic project, no support model
Public sentiment	Reddit users call it small but uniquely structured, and the founder describes it as a practitioner project, not marketing.^³	No independent user reviews surfaced; public discussion is researchers and practitioners citing or amplifying the paper.
Biggest gotcha	Guess: free model with no stated monetization; future paywall or vendor placements possible.^¹	Easy to confuse with commercial site . different product, different owner.^¹

Pick The AI Agent Index when

Teams shortlisting AI agents by function
Buyers wanting pricing verified upfront
Startups evaluating agents with no G2 history
Procurement wanting structured, dataset-first comparisons

When The AI Agent Index is not a fit

Buyers needing thousands of verified reviews per product
Procurement teams requiring vendor security attestations
Anyone mistaking it for MIT's academic safety research
Sole basis for a final purchase decision

Pick AI Agent Index when

AI safety and policy researchers
Procurement teams vetting agent vendors
Security teams cataloguing agent risks
Analysts tracking the agent landscape

When AI Agent Index is not a fit

Buyers wanting reviews, ratings, or pricing before choosing an agent
Teams expecting a searchable, current tool directory
Small teams who just need a quick tool recommendation
Anyone needing vendor contact, trials, or support

Sources

The AI Agent Index: AI Agent Directory, 383 Reviews (2026)theaiagentindex.com
official
Security pagetheaiagentindex.com
security
Built a structured version of what Reddit asked forreddit.com
review
What is the best ai agents directory that you keep coming back to?reddit.com
review
Multi-Agent Dropshipping: SellerClaw & the 2026 Stackdropship-spy.com
review
Forethought Alternatives 2026zappiqai.com
review
The AI Agent Index (arXiv 2502.01635) . MIT academic project, same namearxiv.org
news
The 2025 AI Agent Index (MIT)aiagentindex.mit.edu
official
The AI Agent Index . LinkedIn company pagelinkedin.com
official
The 2025 AI Agent Index (official site)aiagentindex.mit.edu
official
The 2025 AI Agent Index (paper)arxiv.org
official
ACM publicationdl.acm.org
official
MIT Sloan: Agentic AI, explainedmitsloan.mit.edu
news
Cambridge: Most AI bots lack basic safety disclosurescam.ac.uk
security
IETF agent security benchmark (cites the index)ietf.org
security
Kynver NIST comment citing the indexkynver.com
security