Merlonix vs Grafana for Agencies: Metrics Visualization vs. Client SSL Portfolio Monitoring
Grafana is widely used for infrastructure observability — dashboards that visualize time-series metrics from Prometheus, infrastructure telemetry from Grafana Agent, log streams from Loki, and traces from Tempo. It is one of the most flexible visualization layers in the monitoring ecosystem and has a large open-source community.
For agencies managing client SSL and DNS portfolios, Grafana solves a different problem than the one at hand. This post covers where Grafana fits, where it creates friction for agency use, and how Merlonix compares.
What Grafana Gets Right
Highly Flexible Dashboards for Metrics You Already Collect
Grafana's core strength is dashboard flexibility. If you have metrics data in Prometheus, InfluxDB, or another supported data source, Grafana can visualize it in ways that are difficult to achieve with purpose-built SaaS monitoring tools. Custom panels, calculated fields, threshold annotations, and cross-source correlation are all available once the data pipeline is in place.
For agencies running their own infrastructure — servers, Kubernetes clusters, databases — and already collecting metrics via Prometheus or a similar stack, Grafana provides a visualization layer that is significantly more customizable than most commercial alternatives.
Grafana Cloud Synthetic Monitoring for Uptime Checks
Grafana Cloud includes a Synthetic Monitoring module that can run uptime checks and SSL certificate validation from multiple global probe locations. The synthetic monitoring checks are configured via the Grafana Cloud UI and push results into Grafana's managed data store, where they can be visualized alongside other metrics.
SSL certificate expiry monitoring is available via the synthetic monitoring check configuration: you can set up a probe that validates an SSL certificate and alerts when the remaining validity falls below a threshold. This does work — it is just not a first-class feature with purpose-built UI or agency-specific workflow.
Open-Source and Self-Hosted Option
Grafana's open-source distribution is free to self-host. Agencies with existing infrastructure and operations capacity can run their own Grafana instance with Prometheus for metrics collection and the Blackbox Exporter for HTTP and SSL endpoint probing. The total cost of the tooling is zero, with the operational overhead of maintaining the stack.
Where Grafana Creates Friction for Agencies
Grafana Does Not Monitor Anything on Its Own — It Needs a Data Source
This is the most important distinction: Grafana is a visualization layer, not a monitoring system. Without a data source providing metrics — Prometheus scraping endpoints with Blackbox Exporter, a Grafana Agent installed on monitored servers, or a cloud telemetry integration — Grafana shows empty dashboards.
For agencies wanting to monitor client SSL certificates, the self-hosted path requires: deploying Prometheus, configuring Blackbox Exporter targets for every client domain, writing Prometheus scrape configurations, importing or building Grafana dashboard panels to visualize the results, and maintaining alert rules in Prometheus Alertmanager or Grafana's alert engine.
The setup for a single client's SSL monitoring involves four separate components with their own configuration files. Scaling this to a portfolio of 20 or more clients with different subdomains, staging environments, and CNAME records requires managing hundreds of Prometheus scrape targets across a self-maintained infrastructure stack.
No Native CNAME Integrity Monitoring
Grafana Synthetic Monitoring checks whether a URL returns a successful HTTP response and can validate the SSL certificate on that response. It does not check whether the domain's CNAME delegation is pointing at the expected target.
CNAME drift — where a client DNS change redirects a subdomain away from the agency's platform — is a distinct failure mode from SSL expiry. A subdomain can continue to return HTTP 200 with a valid SSL certificate from a different server while pointing at the wrong CNAME target. Standard uptime monitoring, including Grafana Synthetics, will show the endpoint as healthy. Only CNAME integrity monitoring — checking whether the CNAME value matches the expected delegation — detects this failure before it causes a visible outage.
Grafana Cloud Pricing Is Per-User for Paid Tiers
Grafana Cloud's free tier includes limited metrics, logs, and traces retention with three active users. The Pro tier charges per active user per month for users beyond the free allocation. For an agency with five or more team members who need to monitor client portfolios, the per-active-user cost adds up regardless of how many client domains are being monitored.
Purpose-built SSL monitoring tools typically price per monitored asset or per client slot — cost scales with the monitoring scope, not with how many people on the agency team need to see results.
No Per-Client Account Isolation
Grafana's account model is designed for a single organization's monitoring data. Agencies using Grafana for client portfolio monitoring manage all clients within a single Grafana organization, differentiating clients through naming conventions, folder structures, and dashboard permissions.
There is no native mechanism to give an individual client access to their own Grafana monitoring data without giving them some level of access to the agency's Grafana organization. Client-facing dashboards require either building a public dashboard link for each client, managing per-client Grafana user permissions manually, or maintaining a separate Grafana instance per client — none of which scales well across a growing agency portfolio.
Setup and Maintenance Overhead
Grafana is a tool for engineering teams that have the operational capacity to maintain a monitoring stack. For agencies whose primary work is building and maintaining client web properties — not operating their own monitoring infrastructure — the setup, maintenance, and upgrade burden of a self-hosted Grafana plus Prometheus stack represents ongoing overhead that does not directly produce client value.
Which Agencies Should Consider Grafana
Grafana makes practical sense for agencies that:
- Already run their own infrastructure with Prometheus or another supported data source
- Need highly custom dashboard visualization for metrics beyond SSL and DNS
- Have the engineering capacity to maintain a self-hosted monitoring stack
- Want to consolidate client SSL monitoring into an existing Grafana deployment at no additional tooling cost
Grafana is harder to justify for agencies that:
- Need SSL and DNS monitoring without existing metrics infrastructure
- Want per-client account isolation and client-accessible dashboards without custom development
- Need CNAME integrity monitoring as a native feature
- Are looking for minimal setup time across a growing client portfolio
How Merlonix Compares
| Merlonix | Grafana | |
|---|---|---|
| Primary use case | Agency SSL/DNS portfolio | Metrics visualization |
| Requires separate data source | ❌ No | ✅ Yes — Prometheus or equivalent |
| SSL certificate monitoring | ✅ Core feature | ✅ Via Synthetic Monitoring |
| CNAME integrity checks | ✅ Core feature | ❌ Not available |
| DNS resolution monitoring | ✅ 3 independent resolvers | ❌ Not native |
| Multi-tenant client accounts | ✅ Native | ❌ Custom build required |
| Per-client dashboards | ✅ Native | ❌ Custom build required |
| Vendor status tracking | ✅ 11 platforms | Via custom integrations |
| Self-hosted option | ❌ SaaS only | ✅ Open-source |
| Setup time | Under 2 min per client | Hours to days |
For agencies whose monitoring scope is SSL certificates and DNS health across a client portfolio, Merlonix is built for that problem directly. For agencies already running a Grafana and Prometheus stack for their own infrastructure, extending Blackbox Exporter and Synthetic Monitoring to cover client SSL checks is a reasonable consolidation — with the understanding that CNAME integrity monitoring and per-client account isolation require custom implementation on top.