Sonar review
Sonar brings ISP billing, network operations, payments, and service workflows together.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Sonar is a cloud-based OSS/BSS platform for internet service providers, including fiber, wireless, cable, MDU, and VoIP operators. It combines recurring billing, customer accounts, invoices, payments, provisioning, network monitoring, inventory, ticketing, field service, scheduling, and reporting. The product is aimed at providers that want billing and network operations in one web and API-accessible system rather than separate tools for each workflow.
Pricing starts at $500 per month with everything included, while premium features are available à la carte. The published subscriber tiers charge $1.25 per active subscriber per month for 1–5,000 subscribers, $1 for 5,001–10,000, and $0.75 for 10,001–50,000, with annual billing. An Enterprise plan is available through a quote. Buyers should account for the possibility that premium features and integrations affect the final price, and should compare the annual per-subscriber structure with their subscriber base and growth plans.
Sonar’s strongest differentiator is its breadth across ISP operations. Billing supports configurable cycles, prorated charges, packages, discounts, SKUs, usage-related bandwidth data, invoice batching, taxes through Avalara, auto-pay, batch payments, suspension, dunning, and vacation mode. Network provisioning, IP address management, monitoring, alerting, CRM, field service, inventory, and customer portals extend the system beyond invoicing. Integrations include Plume, Calix, Cambium, Avalara, Preseem, VETRO, and other telecom tools, while sonarPay adds payment processing in the U.S. and Canada. Growing providers seeking an integrated operating system should consider Sonar; smaller teams wanting a free product or a narrowly focused billing tool should look elsewhere.
Sonar pros and cons
- Where it wins
- Combines billing, payments, provisioning, monitoring, and ticketing
- Supports prorated charges, usage data services, taxes, and delinquency workflows
- Offers API access, customer portals, and broadband ecosystem integrations
- Where it doesn't
- No free plan is available
- Per-subscriber tiers use annual billing
- Premium features and integrations may add to the final quote
Sonar fact sheet, pricing and score →
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