CallMeter

Overview

CallMeter brings load testing, synthetic call monitoring and voice-quality analytics into one service. Teams can benchmark infrastructure under configurable traffic, watch production paths with continuous probes, and place quality gates in delivery pipelines. It is a specialist choice for operational voice work rather than a general-purpose uptime monitor.

Key features

Configurable SIP and media testing

Load tests can vary endpoint counts, SIP methods, authentication modes and call duration. SIP message capture with ladder diagrams gives engineers a way to inspect signaling behavior, not just a pass/fail result. More than 90 real-time quality metrics are measured for each call, second, endpoint and direction. MOS scoring, jitter tracking and packet-loss tracking make the output relevant to both perceived quality and network diagnosis.

Audio support includes PCMU, PCMA, G.722, Opus, G.726-32, GSM, Speex, AMR and iLBC. Video tests can use H.264, H.265, VP8 and VP9. This broad codec range helps mixed voice-and-video environments, while organizations dependent on codecs outside it should verify compatibility before purchase.

Continuous probes and automation

Probes can operate continuously in caller or callee mode, on interval or cron schedules. Quality thresholds, sliding-window status and webhook notifications turn recurring checks into actionable monitoring instead of occasional test runs. The REST API covers test execution, metric retrieval and probe management, and quality gates are supported in GitHub Actions, GitLab CI and Jenkins. That combination suits teams embedding telecom checks in release and incident workflows.

Workers, privacy and security

Managed cloud workers are available for internet-reachable SIP systems. Private infrastructure requires Docker-based user-owned workers, which can run inside the customer network; SIP signaling and RTP media stay there while only aggregated quality metrics leave it. This is a meaningful architectural advantage for restricted environments, but it also means private deployments carry their own worker-management responsibility.

CallMeter states that it uses TLS 1.3 in transit, AES-256 at rest, application-level encryption for sensitive credentials, access controls and regular security assessments. It also states that personal-data processing follows GDPR and CCPA/CPRA.

Pricing

CallMeter uses paid, quote-based pricing. Starter, Professional, Business and Enterprise plans are billed monthly or annually, with features, usage limits and service levels varying by plan; each therefore requires a sales conversation. Enterprise / White-Label is billed monthly or yearly, can be cancelled anytime, and adds multi-tenant, branded and resellable operation. That tier is aimed at providers packaging the platform for their own customers rather than a single internal team.

The seven-day free trial requires a valid payment method and converts to a paid subscription unless cancelled before it ends. Budget-conscious evaluators should set a cancellation reminder, and teams needing firm quota or SLA comparisons should obtain plan terms before committing. No free plan is offered.

Platforms

CallMeter is delivered through a web interface and API, with self-hosted Docker workers for deployments that need to reach private networks. Cloud workers cannot reach SIP infrastructure that is not exposed to the public internet.

Who it's for

Choose CallMeter when carrier, enterprise-telephony or MSP teams need controlled SIP load, detailed per-call diagnostics, continuous trunk monitoring and programmable CI/CD checks. It is especially compelling where media must remain inside a private network. It is less suitable for buyers seeking transparent self-service pricing, a permanent free tier or a simple public-endpoint monitor.

Pros and cons

• Pros: More than 90 per-call, per-second and directional metrics support deep troubleshooting.
• Pros: Configurable SIP scenarios, ladder diagrams and wide audio/video codec coverage support realistic testing.
• Pros: Continuous probes, webhooks and CI/CD quality gates connect monitoring with operations and releases.
• Pros: User-owned workers keep signaling and media in private networks, with only aggregate metrics leaving.
• Cons: Every plan is custom-priced, so comparing cost and quotas requires sales engagement.
• Cons: The trial needs a payment method and renews into a paid subscription unless cancelled within seven days.
• Cons: Cloud workers are limited to publicly reachable SIP systems; private targets need customer-run workers.

Alternatives

For a broader shortlist, see VoIP Monitoring Software.

Pick Obkio instead if you want freemium access across web, mobile and desktop platforms, including a 14-day premium trial with up to 10 agents and no card required.

Dotcom-Monitor is a better fit for general target monitoring with a free plan covering up to 25 targets, five-minute frequency and two locations.

Choose HOMER for a free, 100% open-source, self-hosted option with commercial support available by quote.

sip-exporter suits teams wanting a free AGPL-3.0 project for personal, educational or conditionally commercial use on Linux and self-hosted systems.

Consider MultiDSLA when a controller-plus-node design for more than 100 nodes is the priority.

Bicom Systems SIP Monitoring (sipMON), Nectar Diagnostics and ServicePilot VoIP Monitoring are alternatives for buyers whose platform and commercial-support requirements align better with those products.

Verdict

CallMeter is a strong choice for voice-infrastructure teams that need configurable SIP stress tests, rich quality telemetry, continuous probes and API-driven automation, especially when private-network workers matter. Look elsewhere if transparent pricing, a no-card trial, a permanent free tier or a simpler monitoring scope is more important than deep telecom testing.