Yes: Business and up
Signed SLA statements
Each period's attainment, signed and checkable by anyone without an account.
CompareUptimeRobot
Observer vs UptimeRobot
UptimeRobot is monitoring-first: it pings endpoints and offers a status page on top. Observer reads the metric your engineers already trust, so the page reflects the threshold that defines your SLA.Checked against UptimeRobot's own public pages.
Observer ahead on
9of 9
- Signed SLA statementsPartly:
- Per-customer statusNo:
- AI updates from evidenceNo:
- Incident evidence exportPartly:
- What drives statusPartly:
- Built-in monitoringPartly:
- Signal source & data localityPartly:
- Pricing modelPartly:
- Open source & engineer surfaceNo:
UptimeRobot's answers from its own public pages, checked .
Verdict
The short answer.
UptimeRobot is built for
External uptime checks at scale, with a status page layered on the monitors.
Observer instead
Reads the internal metric your engineers trust, so healthy means the threshold behind your SLA, not a URL that answers.
Pick
Choose UptimeRobot for simple external uptime checks at scale. Choose Observer when healthy is defined by an internal metric, not whether a URL responds.
At a glance
The record first, then the mechanics.
What your customers can check comes first. How the page runs follows.
The record
Signed SLA statements
- Observer
- Yes: Pro plan
- UptimeRobot
- Partly: uptime reports
Per-customer status
- Observer
- Yes: from Pro
- UptimeRobot
- No: one verdict per page
AI updates from evidence
- Observer
- Yes: drafts, you publish
- UptimeRobot
- No: not listed
Incident evidence export
- Observer
- Yes: signed JSON + PDF
- UptimeRobot
- Partly: through the API
The mechanics
What drives status
- Observer
- Yes: metric + threshold
- UptimeRobot
- Partly: monitor checks
Built-in monitoring
- Observer
- Yes: telemetry + probes
- UptimeRobot
- Partly: core product
Signal source & data locality
- Observer
- Yes: inside your network
- UptimeRobot
- Partly: public endpoints
Pricing model
- Observer
- Yes: flat per tier
- UptimeRobot
- Partly: per monitor, per seat
Open source & engineer surface
- Observer
- Yes: agent, Apache 2.0
- UptimeRobot
- No: closed source
Yes: does itPartly: partlyNo: does notMethod: each answer is graded against a status page with a record customers can check, using the vendor's own public pages. Checked .
Side by side
Line by line.
The same 9 dimensions on every comparison, each with the question it answers.
Dimension
Observer
UptimeRobot
The record
Signed SLA statements
Can a customer check the SLA figure without taking your word for it?
Yes: Pro plan
Each period's attainment, with the working shown, hashed and signed. Your customer checks it at /reliability/verify without an account.
uptime reports
Monthly uptime email reports. SLA statements, signed or otherwise, are not listed.
Per-customer status
Can each customer see their own status?
Yes: from Pro
One probe can publish a different verdict per customer, with its own SLO target, subscribers and access.
one verdict per page
Status-page count is set by plan: one on free, up to unlimited on the highest tier.
AI updates from evidence
Who writes the customer update, and from what?
Yes: drafts, you publish
AI drafts the customer update from the incident's measured status changes and earlier updates. It leaves the cause to your team, and a person publishes.
not listed
AI-drafted incident updates are not listed on its pricing page.
Incident evidence export
Can one incident go in the file, with proof?
Yes: signed JSON + PDF
From Business, an incident exports with detection time, affected services, the measured impact window, the update timeline and notification receipts. It verifies on the same page as SLA statements.
through the API
Monitor and incident details are available through the API. A signed incident record is not listed.
The mechanics
What drives status
What flips a component from up to down?
metric + threshold
Reads the metric your engineers already watch, applies your threshold, and publishes the verdict.
monitor checks
Checks drive status automatically. Status pages are a feature layered on the monitors.
Built-in monitoring
What does it check on its own?
Yes: telemetry + probes
Prometheus, OpenTelemetry, CloudWatch, Loki, Elasticsearch and SQL/NoSQL, plus HTTP, TCP, DNS, TLS, ICMP, gRPC and WebSocket probes.
Yes: core product
HTTP, keyword, ping, port, API, UDP, DNS and SSL monitors. Interval and features depend on the plan.
Signal source & data locality
Where does the signal come from, and where does it go?
inside your network
The agent runs next to your data and sends readings and verdicts outbound. Database and source credentials stay on the host.
public endpoints
External checks against public endpoints, every 5 minutes on free and down to 15 seconds on higher plans.
Pricing model
How does the bill grow?
flat per tier
Free, then $19, $79 or $199 a month, then Enterprise. No per-seat or per-subscriber fees.
per monitor, per seat
Tiered by monitor count and check interval. Login seats come with the Team and Scale plans; extra seats cost more.
Open source & engineer surface
What can engineers read, script and extend?
Yes: agent, Apache 2.0
Open-source agent on every plan; public API, CLI, MCP server and AI-assistant skills from Starter.
No: closed source
API on every plan, including free, plus a CLI and a Terraform provider.
Beyond the page
What Observer adds after the incident.
The reporting customers, procurement and auditors ask for, built on the same measurements as the page.
Yes: Business and up
Reliability Center
Public commitments and attainment, and a private portal per customer.
Yes: Pro and up
Executive summary
Attainment, risk and MTTR across every service, for the board.
Yes: Starter and up
SLOs and error budgets
Budgets read from the same metrics, with burn alerts.
Yes: Starter and up
Customer updates from evidence
AI drafts the update from what was measured; a person publishes.
Yes: Pro and up
Status per customer
One probe, each customer judged against their own SLO.
Fair to say
When UptimeRobot is the better pick.
Many simple checks
You need lots of HTTP, keyword, ping, port and DNS checks, and little else.
Up means reachable
Whether a URL responds is the whole definition of healthy for your service.
Migration
Moving from UptimeRobot.
Run the agent
One container next to the systems you already monitor. It dials out; nothing in your network accepts a connection from Observer.
Map what you watch
Recreate each monitor as an HTTP, TCP, DNS or TLS probe, then add the internal metric that actually defines healthy.
Publish and route
Group metrics into services and publish the page. Send flips to Slack, PagerDuty, Teams or a webhook; recoveries always deliver.
Switch over
Keep UptimeRobot live until the page matches what you would have posted. Then point your status domain at Observer (custom domains are on paid plans).
Questions
Asked before switching.
Is Observer an UptimeRobot alternative?
Yes. UptimeRobot is monitoring-first with a status page attached; Observer turns the internal metric your engineers watch into the public verdict.
What does UptimeRobot's free plan include?
50 monitors checked every 5 minutes and one status page on an UptimeRobot URL; UptimeRobot describes it as good for hobby and non-profit projects. Observer's free tier covers one production status page and one agent.
Can Observer replace UptimeRobot's checks?
Observer runs HTTP, TCP, DNS, TLS, ICMP, and more, and also reads metrics and logs that an external check cannot reach.
Sources
Where the facts come from.
Every statement about UptimeRobot on this page was checked against these public pages, most recently on .
github.com
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