Every model, provider, and subprocessor your vendors run on — mapped, cited, and refreshed weekly. So your board, GC, and CISO hear it from you first.
The encyclopedia
Foundation models, inference providers, agent platforms — each entry researched, cited, and refreshed weekly. Read the supply chain, don’t take the vendor’s word for it.
Browse the encyclopediaOur thesis
Vendor questionnaires are self-reports.
They tell you what the vendor says about itself.
We read the supply chain itself —
and publish what we find.
What it does
Encyclopedia
Claude Sonnet 4.5
Anthropic · 4 models
GPT-5 Turbo
OpenAI · 6 models
Gemini 2.5 Pro
Google · 5 models
Llama 4 Maverick
Meta · 3 models
Mistral Large 3
Mistral · 2 models
Encyclopedia
A living encyclopedia of the foundation models, inference providers, and agent platforms your vendors are actually running on. Researched, cited, and refreshed weekly — not a self-attested checklist.
Tracing
Which models the vendor runs. Who their subprocessors are. Where the data lands. A graph you can navigate.
Posture
A score across retention, training use, certifications, and access controls. Every input cited. Audit the verdict; don't just trust it.
Security score
How it works
Mantleline runs continuous background research on every vendor in your stack — citations, certifications, subprocessors, and supply chain.
Every approved finding lands in the public encyclopedia. Citations attached, evidence linked — ready for the next reviewer, the auditor, and the board.
Review the evidence, score the risk, sign off — or send it back for another pass. The work product travels with the vendor, not the reviewer.
Pricing
Free
$0
Browse the encyclopedia. Sample the assessment flow on three vendors a month.
Pro
$49/mo
Twenty vendors tracked, weekly refresh, change alerts, supply-chain discovery.
Enterprise
Custom
Unlimited vendors, SAML, audit log, BAA, dedicated support.
0
Models tracked
0+
Supply-chain edges mapped
0
Compliance frameworks scored
0
Enforcement layers per request
Type II
SOC 2 Type II ready
Product pricing
Free to browse. Upgrade the day you need to know before the auditor does.
Browse the full encyclopedia. Sample the assessment flow on three vendors a month. No card, no time limit.
$0forever
Twenty vendors tracked, refreshed weekly, alerted on change. For the practitioner who has to know before the auditor does.
$49per month
Your entire vendor surface. Dedicated support, custom branding, SAML, audit log, BAA — whatever your auditor and your GC need.
Request more info
Two ways to work with Mantleline
Self-serve · Product
Monitor your AI vendors yourself.
Browse the Mantle Index. Researched, cited, refreshed weekly. Free to browse; Pro adds tracking, alerts, and supply-chain discovery for the vendors you care about.
Done-for-you · Consulting
Bring in the operator.
Fixed-price AI vendor audits, deployment reviews, HR-AI (Mobley / AEDT / CO AI Act) exposure work, and board-level advisory — run by Zach, delivered board-ready. For CISOs, GCs, and CHROs who need the defensible answer this quarter.
Get started
If your AI footprint is bigger than your governance program, that gap has a shelf life. We’d like to help close it.