One flat price. Every client covered.
Pick the tier that matches how many client sites you watch — up to Compliance, with continuous audit-ready evidence. SSL, DNS, and vendor monitoring on every plan. No per-seat upsells. No per-check metering. No surprise invoice at the end of the month.
Not ready to sign up? Run a free instant check — no account needed.
Built for agencies managing dozens of client domains — monitoring the SSL, DNS, and uptime failures that otherwise surface as 2 a.m. emergencies.
- SSL checks last 7 days
- 8.7k
- DNS lookups
- DoH (encrypted)
- Upstream vendors tracked
- 11
- Trial → alert in
- < 5 min
Not sure yet? Take the interactive demo — walk the workspace with sample data, no signup. Or see the evidence behind the product.
Free
$0 / no cardNo credit card, no trial clock. A free uptime monitor only checks if a URL returns 200 — Merlonix Free also catches the certificate expiry, DNS drift, and upstream-vendor outage that look like “up” until they aren’t. Upgrade any time for more assets, one-minute checks, more seats, and a status page without the badge.
- Monitor up to 3 services (sites, domains, or certificates)
- SSL expiry, DNS drift & upstream-vendor checks every 5 minutes
- Email alerts when something breaks
- One webhook alert channel (wire alerts into your own tools)
- One public status page (for a client you add) with a "Powered by Merlonix" badge
Best-effort, no SLA. Free service may change at any time.
Starter
For solo operators watching a handful of clients.
$16/ mo
Billed annually at $190/yr — 2 months free
or $19/mo billed monthly
- 15 monitored assets
- 3 seats
- Checks every 5 min
- Webhook, Slack, Teams & Discord alerts + REST API
Billed monthly or annually. Cancel any time during the trial at no charge.
Team
For small agencies that need faster checks and more seats.
$66/ mo
Billed annually at $790/yr — 2 months free
or $79/mo billed monthly
- 60 monitored assets
- 10 seats
- Checks every 1 min
- Status pages, PageSpeed & AI scans, PagerDuty/SMS on-call
Billed monthly or annually. Cancel any time during the trial at no charge.
Agency
For the agencies that can't afford an outage they didn't see.
$166/ mo
Billed annually at $1990/yr — 2 months free
or $199/mo billed monthly
- 250 monitored assets
- Unlimited seats
- Checks every 1 min
- AI answer-presence, branded alerts & priority support
Billed monthly or annually. Cancel any time during the trial at no charge.
Compliance
For regulated-vertical teams that need continuous, audit-ready evidence.
$583/ mo
Billed annually at $6990/yr — 2 months free
or $699/mo billed monthly
- 500 monitored assets
- Unlimited seats
- Checks every 1 min
- Everything in Agency + evidence retention & auditor access
Billed monthly or annually. Cancel any time during the trial at no charge.
What you get
Every plan opens on this.
One workspace for every client's SSL, DNS, uptime, and vendor status — with alerts that tell you what to do, not just that something changed.

Enterprise
CustomEverything in Compliance, tailored to your security and procurement requirements. For teams that need SSO / SAML, white-label or reseller packaging, multiple trust centers, or a custom annual contract — talk to us and we'll scope it to the right customer.
Prefer email? hello@merlonix.com
Feature comparison
What you get on each tier.
| Feature | Starter$19/mo | Team$79/mo | Agency$199/mo | Compliance$699/mo |
|---|---|---|---|---|
| Watchpoints | ||||
| Monitored assets | 15 | 60 | 250 | 500 |
| Check cadence | 5 min | 1 min | 1 min | 1 min |
| SSL certificate monitoring | ||||
| TLS cipher/protocol & chain-posture monitoring | ||||
| DNS drift detection | ||||
| Domain-registration expiry monitoring | ||||
| Blocklist & email-deliverability monitoring | ||||
| Continuous security-header monitoring | ||||
| DNSSEC & DANE/TLSA monitoring | ||||
| Continuous email-auth (SPF/DMARC) monitoring | ||||
| AI prompt-injection / hidden-text scan | — | |||
| Rogue-certificate (Certificate Transparency) monitoring | — | |||
| AI agent-readiness drift monitoring (llms.txt / AI-crawler policy / structured data) | ||||
| MCP-server health & tool-drift monitoring (Model Context Protocol) | ||||
| HTTP uptime & response-assertion monitoring | ||||
| Heartbeat / cron dead-man’s-switch | ||||
| TCP port monitoring | ||||
| PageSpeed / Core Web Vitals monitoring | — | |||
| Application-health endpoint monitoring | — | |||
| Broken-link & mixed-content crawler | — | |||
| Upstream vendor status | ||||
| Alerts | ||||
| Email alerts | ||||
| Webhook alerts | ||||
| Slack, Teams & Discord alerts | ||||
| SMS & on-call (PagerDuty, Opsgenie) | — | |||
| AI classification of alerts | ||||
| Collaboration | ||||
| Team seats | 3 | 10 | Unlimited | Unlimited |
| Public status pages | — | |||
| Branded alerts | — | — | ||
| Integration | ||||
| REST API access | ||||
| AI answer presence | ||||
| AI answer-presence monitoring | — | — | ||
| Tracked answer-engine queries | — | — | 5 / client | 10 |
| Weekly answer-drift alerts | — | — | ||
| Compliance & audit | ||||
| 13-month evidence retention | — | — | — | |
| Per-control compliance dashboards | — | — | — | |
| Audit evidence-pack export | — | — | — | |
| Auditor-share read-only access | — | — | — | |
| Quarterly audit-prep reports | — | — | — | |
| Support | ||||
| Support channel | Email + priority | Email + priority | ||
| Support priority | Standard | Standard | Priority | Priority |
On Agency & Compliance
Know how AI answers describe you.
Buyers increasingly ask an AI assistant “who does X?” before they ever reach a search results page. Merlonix tracks the questions that matter to you and your clients, asks public AI answer engines on a weekly cadence, and checks two things: does the engine cite the brand, and does it represent the facts — pricing, positioning — correctly. When a brand that used to be cited drops out, or an engine starts stating something wrong, you get an alert instead of finding out from a prospect.
Perplexity and ChatGPT are both live, and each engine runs independently so a degraded one never blocks the rest. We report what the engines currently say — we don’t promise to change it. Agency includes up to 5 tracked queries per client; Compliance includes up to 10.
Questions you probably have
FAQ.
- Is the free plan really free?
- Yes — $0, no credit card, and no trial countdown. The free plan monitors up to 3 services with 5-minute SSL, DNS, and upstream-vendor checks, sends email alerts, and gives you one public status page (carrying a "Powered by Merlonix" badge). It's a real monitoring account, not a time-limited trial. Upgrade to a paid tier for more assets, one-minute checks, more seats, and a badge-free status page.
- Do I need a credit card to start the trial?
- No. You pick a tier and enter your email. We'll ask for payment before the 14-day trial ends; if you don't upgrade, your account becomes read-only and nothing is charged.
- What counts as a monitored asset?
- One hostname, one domain, or one certificate. A wildcard cert watched across three subdomains is three assets; an apex domain with its www alias is two. The quota is enforced per tenant and you can see the current usage on the dashboard.
- Can I move clients between tenants?
- Not in the v1 product. Each agency lives in one tenant and all their client assets belong to that tenant. Multi-tenant support is on the roadmap — if it's blocking you, tell us and we'll prioritize it.
- How is an alert different from my existing uptime monitor?
- Uptime monitors check if a URL returns 200. Merlonix checks if the certificate powering that URL is expiring, if the DNS record points where you expected, and if the upstream vendor the URL depends on is degraded. Those three failures all look like 'up' to an uptime monitor.
- Compare Merlonix to your current tool (and what switching involves) →
- What is AI answer-presence monitoring?
- On Agency and Compliance, Merlonix tracks the buyer questions that matter to you, asks public AI answer engines on a weekly cadence, and checks whether they cite the brand and state its pricing and positioning correctly — alerting you when that drifts. Perplexity and ChatGPT are both live; each engine runs independently. It reports what the engines currently say. It does not promise to change what they say or guarantee a citation. Every 14-day trial includes a 2-query taste of it, so you can evaluate it before picking a tier.
- What happens if I cancel?
- Your plan downgrades at the end of the current billing period. Monitoring stops but your historical data (past checks, past alerts, attestations) stays available read-only for 90 days. After 90 days the data is deleted per our retention policy.
- Do paid plans come with an SLA?
- Not a contractual one yet — we'd rather show you real numbers than sign a promise we haven't earned the history to back. Merlonix monitors its own production surface on a public status page (the same machinery every tenant gets), and our incident history is written up, evidence and all, on the proof page. Check cadence is 1 minute on Team and above, 5 minutes on Starter and Free. If your procurement requires a contractual SLA with service credits, that is an Enterprise conversation — get in touch.
- See the live status page and incident history →
- Can I self-host Merlonix?
- Not right now. Merlonix uses Cloudflare Workers + Supabase for fan-out monitoring and we have not packaged a self-hosted distribution. If self-hosting is a hard requirement, get in touch — it is an Enterprise-tier conversation.
- Do you have a referral program?
- Yes. Once you have a paid plan, your dashboard shows a personal referral link. Share it with a peer — when they subscribe to any paid plan, you get 20% off your next payment. It's a one-time discount per referral, applied automatically to your next invoice.
- What if I need a few more monitored assets than my tier includes?
- Add asset packs instead of jumping a whole tier. Each pack adds 10 monitored assets for $5/month (or $50/year), and you can stack up to 50 packs. Manage them from your billing page — they attach to your existing subscription and prorate like any add-on.
Start the trial. Watch a client. Decide later.
14 days, no card, no commitment. If you cancel before day 14 you pay nothing and your data is deleted on request.