Comparison
AssetSonar vs GLPI
Two tools districts shortlist for device tracking and IT operations, compared the way a buying committee actually reads them: what each is, what each does well, and what to check before signing. We build Chalk, a third option in this space — that context is worth knowing as you read, and it is why every claim below carries its basis.
AssetSonar
EZO's IT-asset product, and the rare asset tracker that publishes a per-asset price and includes a genuine service desk at the higher tier — metered by the one number a 1:1 district has most of.
Where AssetSonar is strong
- It publishes real per-asset prices instead of gating every number behind a demo — $0.75 per asset per month for ITAM and $1.08 for ITSM — which makes a district budget line something you can build without a sales call.
- Unlimited agents on both plans, so adding technicians, building secretaries or a summer help-desk aide never changes the bill.
- The ITSM tier is a real service desk, not a ticket list: request and incident management, problem and change management, a service catalog, multi-channel intake, automated routing, multi-step approvals, SLA policies with business hours and escalation, a knowledge base and a self-service portal.
- Custody features deeper than most trackers — check-in and check-out, automatic checkouts, automatic custody transfer, reservations and an availability calendar.
- Genuine discovery breadth for a commercial tracker: agent-based discovery, network discovery, MDM integrations, barcode and QR scanning, and RFID tagging.
- Procurement and service done properly — purchase orders and requests with multi-tier approvals, vendor management, warranty integration, service triage, and scheduled and recurring maintenance with automated reminders.
What to check before you buy
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The meter is your fleet. At a per-asset rate, a 1:1 district is billed on the number it has most of, and every Chromebook you add is a line item forever.
Basis: Vendor pricing page quotes ITAM and ITSM as per-asset-per-month rates.
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Packages start at 100 assets, so the smallest sites pay a floor rather than what they use.
Basis: Vendor pricing FAQ: AssetSonar packages start from 100 assets, with volume-based discounts for higher volumes.
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The help desk is the upgrade. SLA management, the service catalog, the self-service portal, the knowledge base, problem and change management and the CMDB are all marked ITSM-only in the vendor's own comparison table — the difference between $0.75 and $1.08 per asset per month.
Basis: Vendor's published ITAM-versus-ITSM plan comparison table.
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Software asset management is a third line item on top of either plan, at $5 per asset per year.
Basis: Vendor pricing FAQ describes Advanced SAM as an add-on available with both ITAM and ITSM plans.
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No SIS or rostering integration — no OneRoster, Clever, ClassLink, PowerSchool, Infinite Campus or Skyward anywhere in EZO's connector catalog, which covers MDM, identity and procurement systems.
Basis: Absent from EZO's published integrations listing for AssetSonar.
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No student, guardian or enrollment concepts. Checkout is employee custody, so a transfer, a withdrawal or grade rollover is invisible unless someone edits the record.
Basis: The product's data model tracks assets and users; the custody features are documented as employee check-in and checkout.
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No parent e-signature on a device agreement, no student fee assessment, no family balances, and no funding-source or grant dimension for ESSER, Title or E-Rate reporting.
Basis: Absent from EZO's documented feature set and plan comparison.
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Device connectors are ingest-oriented. The MDM integrations import device state into AssetSonar; nothing pushes a reviewed set of changes back, so an OU move or disabling a stolen Chromebook stays manual in Google Admin.
Basis: EZO's integration listing describes MDM connectors as importing device data, with no write-back workflow claimed.
GLPI
The one product in this comparison that shares Chalk's whole premise — free, open source, self-hostable, with a real ITIL service desk attached to a real asset inventory — and none of its K-12 model.
Where GLPI is strong
- Genuinely free and genuinely open: GPL-3.0 on GitHub, downloadable and self-hostable with no license fee, no crippled community edition, and two decades of production use behind it.
- A full ITIL service desk — tickets, problems and changes, with planning, statistics and dashboards — sitting on the same database as the asset inventory rather than integrated with it.
- Very broad inventory coverage: computers, monitors, software, network equipment, printers, phones, cartridges, consumables, SIM cards, cables, PDUs and datacenter infrastructure, plus a CMDB over the relationships between them.
- Financial management most asset trackers do not attempt — budgets, contracts, suppliers and license tracking as first-class objects, so the cost side of the estate lives with the asset side.
- GLPI Agent does automated inventory across platforms, so hardware and software data arrives without anyone typing serial numbers.
- A multi-entity model with granular profiles and access control that maps naturally onto a district of many schools, plus a large plugin ecosystem — and both deployment shapes are real and priced openly, self-hosted or hosted GLPI Network at a published per-user rate.
What to check before you buy
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The free download and the product Teclib' sells are not the same surface. OAuth SSO, SCIM, GLPI AI, the advanced dashboard and whole tiers of official plugins are bundled into paid GLPI Network subscriptions.
Basis: Vendor pricing page lists these as contents of the Basic, Standard and Advanced subscription tiers.
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Self-hosted support starts at €100 per month even for a small installation, and the meter is IT agents — the technicians who answer tickets — with tiers stepping to €300, €1,000 and €4,500 per month.
Basis: Vendor pricing page, self-hosted subscription tiers with per-tier agent limits.
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It is a general ITIL tool with no K-12 model: no student, guardian or enrollment concepts, and no SIS or rostering connectors — no OneRoster, Clever, ClassLink, PowerSchool, Infinite Campus or Skyward. Students arrive by import.
Basis: Absent from GLPI's published feature set, which describes users, groups and entities rather than students.
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No 1:1 circulation machinery. GLPI can reserve and assign equipment, but there is no student device agreement, no parent e-signature, no overdue on a school-year loan, no damage fee and no family balance.
Basis: Absent from the vendor's documented modules, which cover assets, helpdesk, CMDB and financial management.
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No ChromeOS story. Inventory comes from GLPI Agent and network scanning; Google Admin, Intune and Jamf ingest are plugin or integration territory rather than documented core modules, and there is no ChromeOS AUE surface.
Basis: Core inventory is documented as GLPI Agent-driven; no first-party MDM connector appears in the published feature list.
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It is not an identity provider. GLPI authenticates against directories and external providers — and OAuth SSO is itself a subscription plugin — rather than issuing SAML or OIDC to your other vendors.
Basis: Vendor pricing page lists OAuth SSO and SCIM as plugins included with paid subscriptions, positioning GLPI as the consumer of identity.
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Self-hosting GLPI is a PHP and database deployment plus agent rollout that you patch and upgrade yourself, unless you buy a subscription or engage a partner. That is a real operations line, not a download.
Basis: GLPI is distributed as a PHP application released on GitHub with a separately versioned GLPI Agent; the vendor routes implementation through its partner network.
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Pricing, documentation and support are anchored to a European vendor and priced in euros, so a US district is usually buying implementation through a partner rather than from the vendor directly.
Basis: Vendor site publishes euro pricing and directs implementation to its Platinum Partner network.
The third option: Chalk
If you are weighing AssetSonar against GLPI, Chalk belongs on the same shortlist. It is the open-source K-12 IT stack: device inventory that fills itself in from Google Admin, Intune, and Jamf against a roster synced from your SIS, a 1:1 circulation desk with agreements and fees, repairs with parts and costs, a help desk that already knows who is asking, and a built-in SAML/OIDC identity provider.
- Self-host it free forever under AGPL-3.0 — the entire feature set, one binary, your infrastructure — or use the hosted version, priced by fleet size with no per-seat or per-student fees and the price ladder published.
- Built only for K-12: students, buildings, custody, funding sources, and ChromeOS auto-update expiration are native concepts, not custom fields.
- Writes back to Google Admin as a reviewed diff — every OU move, disable, and deprovision previewed before it executes — and serves a OneRoster 1.1 API so other district systems can pull the roster from Chalk.
- Fees are assessed and tracked without touching payment cards, keeping the asset system out of your PCI scope.
See all three on your own roster.
Chalk installs to a populated inventory in about 30 minutes. Self-host free under AGPL-3.0, or let us run it — priced by fleet size, never per seat.