Sematext Synthetics monitors APIs, URLs, websites, and user journeys from locations around the globe. HTTP monitors record response data and timings and can check status codes, headers, content, and timing conditions. Browser monitors run scripts that simulate website actions using Playwright and headless Google Chrome in an isolated Node.js environment. The service checks SSL certificate validity and expiry, while HTTP monitors can also detect certificate changes. Alert integrations listed include Slack, OpsGenie, Zapier, and VictorOps. The Vercel integration can create a Browser monitor for selected projects. Browser monitor credentials can be held in AWS Secrets Manager and inserted into scripts only when they run. Private location agents run in Docker containers on Linux or Windows machines that support Docker. An HTTP monitor run has 128 MB of memory, and response bodies are trimmed to 2 MB. Pay-As-You-Go is listed at $2 per month per HTTP monitor and $7 per Browser monitor, with a $5 monthly minimum and 30 days of retention; monitor count and retention affect price. A 14-day trial is available, and support is offered by email, live chat, and phone.
Who it is for
It suits teams that need recurring API or browser checks, including checks from private locations. The listed alert integrations and Vercel support may be useful for teams using those services.
What is good
- Checks response codes, headers, content, and timing
- Browser monitors simulate user actions with Playwright
- Checks SSL validity, expiry, and certificate changes
- Private agents can run in Docker on Linux or Windows
What to know first
- No free plan is listed
- HTTP monitor runs have 128 MB memory
- Response bodies are trimmed to 2 MB
- No static IP list is provided for firewall allowlisting
Verdict
Sematext Synthetics covers both endpoint checks and scripted browser journeys, with certificate monitoring and private-location agents. Budget for monitor-based pricing and note the HTTP run memory and response-body limits.
Sematext Synthetics plans and pricing
All plansCompared on synthetic monitoring
- Free plan
- No
- Paid from
- $2/mo
- Check frequency
- 1 min
- Response assertions
- Yes
- Multi-region checks
- Yes
- Private locations
- Yes
- Incident workflows
- Yes
