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Procurement · Business Platform

VANTOR

Open-Source Procurement Operating System — Ten Products, One Graph

A free, open-source procurement operating system that merges ten separate procurement products into one platform: suppliers, sourcing and RFQs, contracts, purchase orders, spend intelligence and AI-assisted negotiation, connected in a single Procurement Graph with row-level tenant isolation and a hash-chained audit log.

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PrototypePrivate cloudWeb
Prototype

VANTOR at a glance

Self-hosted on your own hardware.

Best forProcurement teams
DeploymentPrivate cloud
PlatformsWeb
TypeBusiness Platform
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Licence

VANTOR is free and open source

GNU AGPL v3 or laterAGPL-3.0-or-later · free for commercial use too · free to self-host and modify; if you serve a modified version over a network, you must publish that source (section 13)
Source availabilityThe AGPL-3.0-or-later source is not on a public repository yet. It is ready, and we will send it to you or open the repository on request — nothing about it is held back commercially. Ask us for the source.

The problem

Procurement teams juggle suppliers, RFQs, quotes, contracts, purchase orders, invoices, spend and savings across disconnected tools. Nothing reconciles, so a commitment made in a spreadsheet never reaches the contract, and spend analysis is a month-end archaeology project.

What it does for you

Run procurement as one connected process rather than ten tools: a commitment made anywhere in the graph is visible everywhere else, with every AI answer cited and every action on the audit chain.

Capabilities

What VANTOR does

Suppliers: Onboarding, Qualification, Scorecards, Risk and Certification Tracking
Sourcing: RFI/RFQ/RFP, Quotation Comparison, Award and Share-Capped Allocation
Contracts: Obligations, Renewals, E-signature and 11-Dimension PO Matching
Purchasing: Requisition to PO to Goods Receipt to Invoice with 3-Way Match
Spend Intelligence: Cube, Leakage, Maverick Spend, Concentration and Should-Cost
Price Intelligence: Median Baselines and Anomaly Cases Per Currency
Governance: Tiered Approvals, Segregation of Duties, Budgets and Catalogs
AI Gateway With Typed Tool Registry, Human-In-The-Loop Gates and Cited Answers
AI Supplier Negotiation Simulator With a Concession Ladder and Walk-Away Floor
Keycloak OIDC Auth, Postgres Row-Level Tenant Isolation, Hash-Chained Audit

Use the tabs above for what makes it different, and for pricing.

FAQ

Questions about VANTOR

What is VANTOR?
VANTOR: Open-Source Procurement Operating System — Ten Products, One Graph. A free, open-source procurement operating system that merges ten separate procurement products into one platform: suppliers, sourcing and RFQs, contracts, purchase orders, spend intelligence and AI-assisted…
Who is VANTOR built for?
It is built for Procurement teams as a platform product, with role-based permissions and data isolation for Web deployments.
How is VANTOR deployed?
VANTOR is Self-hosted on your own hardware. It keeps working through an outage, because your records live on your own machine first.
What is the current status of VANTOR?
Current status is “Prototype”. Contact the studio for a walkthrough and deployment options.

Deploy VANTOR in your organization

See the live demo on your own workflow, then get one written quote with setup help.

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✓ Live demos where published✓ Offline-first architecture✓ Full data ownership✓ Replies within one to two working days