What is AlertSite?
AlertSite is the synthetic monitoring product from SmartBear, covering API uptime, transaction monitoring and Real Browser Monitoring (RBM) from a global network of monitoring nodes. It runs scheduled checks against APIs, web apps and full user journeys, alerts on SLA breaches, and integrates with the broader SmartBear suite for API testing and design.
AlertSite is positioned for enterprise teams that need a single synthetic monitoring vendor — uptime, API health, multi-step transactions and end-user experience under one dashboard with sales-led pricing and support.
When AlertSite is the right tool
AlertSite is a fair fit when you need:
- Enterprise synthetic monitoring breadth. APIs, transactions and Real Browser Monitoring from a single vendor with a managed global node network.
- SmartBear-stack alignment. Existing investment in ReadyAPI, SwaggerHub or other SmartBear products that integrates cleanly with AlertSite.
- Sales-led procurement. Quote-based pricing and SLAs that fit corporate procurement processes.
- Scripted multi-step monitors. Selenium-based browser checks beyond simple URL pings.
If your monitoring needs are broad and your buying process is enterprise, AlertSite delivers across uptime, API and browser monitoring.
Where AlertSite stops being enough
AlertSite's enterprise model creates friction when self-service speed and load testing matter:
- No load testing. AlertSite monitors single-user latency and uptime; concurrent-user load testing requires a separate tool.
- Pricing opacity. Sales-led tiers with per-monitor and per-location costs that compound; harder to compare than per-test cloud pricing.
- Limited Core Web Vitals tracking. Lighthouse scoring and CWV trend dashboards are typically not the focus.
- Slow self-service iteration. Adding new monitors or scaling up frequency often requires sales engagement rather than developer-led configuration.
- Tooling fragmentation. Many teams end up running AlertSite plus a separate load tester plus a CWV tool — three contracts, three dashboards.
LoadFocus vs AlertSite — feature comparison
How LoadFocus compares against a typical AlertSite enterprise plan. Pricing accurate as of May 2026.
| Feature | LoadFocus | AlertSite |
|---|---|---|
| Cost | Free tier; from $29/mo | Quote-based, sales-led |
| API monitoring | Yes | Yes (specialty) |
| Real-browser synthetic | Yes (Selenium/Playwright) | Yes (Real Browser Monitoring) |
| Load testing | Yes (up to 12,500 VUs) | No |
| Core Web Vitals monitoring | Yes | Limited |
| Multi-region locations | 25+ globally | Global node network |
| Self-service signup | Yes (no sales call) | Sales-assisted |
| Pay-per-test pricing | Yes | Per-monitor enterprise |
| CI/CD integration | Yes (API + GitHub Action) | API available |
| Alerts (email, Slack, webhooks) | Yes | Yes |
FAQ
Is LoadFocus a direct replacement for AlertSite?
For API monitoring, real-browser synthetics and uptime checks, yes — with the added benefit of bundled load testing on the same account. Teams that need AlertSite specifically for tight SmartBear-suite integration may want to keep AlertSite for that workflow.
Can we migrate our existing AlertSite monitors?
Most AlertSite monitors map directly: HTTP API checks, Selenium-based browser flows, status code and response time assertions. Teams typically run both for a sprint, validate parity, then cut over.
What about load testing — can it run on the same account?
Yes. LoadFocus runs distributed load tests up to 12,500 virtual users on the same account, so you can stress-test the same APIs and pages you monitor without onboarding a second vendor.
How does pricing compare?
AlertSite is sales-led with per-monitor and per-location costs. LoadFocus uses transparent monthly tiers from $29/month with concurrent VUs and check frequency published upfront. For most non-enterprise use cases, total cost is lower and procurement is faster.
How long does setup take?
Minutes per monitor. Add a URL or API endpoint, pick frequency and locations, set assertions, and checks start running immediately — no sales call, no contract negotiation.
Can it integrate with CI/CD?
Yes. LoadFocus exposes a REST API and a GitHub Action so monitors and load tests run on every merge with thresholds for response time, error rate and SLA. AlertSite has an API but the integration pattern often involves heavier setup.
Try LoadFocus free
If you're using AlertSite today and want self-service synthetic monitoring with load testing on the same account, LoadFocus consolidates the toolchain. Sign up at loadfocus.com/signup — no credit card — and run your first API monitor and load test in minutes.
