Both Splynx and Sonar serve ISPs with end-to-end billing and operations management — but they differ significantly in pricing model, network management depth, and deployment flexibility. This page breaks down exactly where each platform wins.
4.8 Average Rating
Most ISP billing tools advertise the same features. What separates them: how configurable the system is, how much access you have, and whether anyone picks up when you call
Built-in RADIUS, native TR-069/ACS remote CPE management, 17+ global payment gateways, and pricing that starts at $0.55 per subscriber — not $1.25. Splynx is the full-stack ISP platform that runs more network for less money.
* This comparison is published by Splynx. All Sonar data is sourced from vendor websites and public documentation as of April 2026.
Splynx features native integrations with your most-used tools, including netElastic, MikroTik, Ubiquiti as well as NetSuite, Sage, Quickbooks
This is how ISP management system should work
Sonar has no native ACS server — CPE remote management depends entirely on vendor-specific integrations like Calix or Adtran, leaving MikroTik and Ubiquiti fleets without automated provisioning.
Splynx's built-in TR-069/ACS auto-configures any standards-compliant CPE on first connection, pushes firmware updates in batch, and lets customers reboot their own routers from the portal. Your techs deploy hardware. The platform handles everything after.
With Sonar, you're standing up a separate FreeRADIUS server, maintaining it, and stitching it to your BSS with custom scripts. Splynx ships with a native RADIUS server that handles PPPoE, IPoE, MAC auth, and IPv6 prefix delegation — no external setup, no middleware.
When an invoice goes unpaid, RADIUS blocks the subscriber automatically, with traffic redirected to a self-payment page. No cron jobs. No manual syncs.
sonarPay is Sonar's built-in payment processor — and it only works in the US and Canada. The moment you operate in Europe, Africa, Oceania, or Latin America, you'll need to integrate external payment gateways (Sonar supports them, but requires separate setup). Splynx connects natively to 17+ payment gateways — Stripe, GoCardless, SEPA direct debit, M-PESA, PayFast, Moneris, and more — so you can collect payments wherever your subscribers are.
Layer in true daily-rate prepaid, usage-based overage billing, and CDR-rated VoIP charges on a single invoice, and no subscriber model is left unserved.
Sonar's pricing starts at $1.25 per subscriber per month with a hard $500 floor — a fixed cost that doesn't reward growth. Splynx starts at $0.55 and drops to $0.165 per subscriber at 10,001+.
For a WISP running 2,000 active subscribers, that's roughly $1130/month on Splynx versus $3000 on Sonar — the same full-featured OSS/BSS platform at 60% less. The more subscribers you add, the wider that gap gets.
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