Sematext Synthetics

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Sematext Synthetics is ranked #5 of 31 in synthetic monitoring on Inferse. It runs on API, Linux, Self-hosted, Web, Windows. There is no free plan. A free trial is offered. Paid plans start at $2/mo.

Compared on synthetic monitoring

Free plan: Nosematext.com
Paid from: $2/mosematext.com
Check frequency: 1 minsematext.com
Response assertions: Yessematext.com
Multi-region checks: Yessematext.com
Private locations: Yessematext.com
Incident workflows: Yessematext.com

Facts

What it does: Sematext Synthetics actively monitors APIs, web URLs, websites, and user journeys from locations around the globe.sematext.com · 2 Oct 2026
Monitor types: HTTP monitors record response data and timings, while Browser monitors run scripts that simulate user actions on websites.sematext.com · 2 Oct 2026
API checks: HTTP monitors can validate response codes, headers, content, and timing conditions for monitored endpoints.sematext.com · 2 Oct 2026
Browser monitoring: Browser monitors use Playwright with a headless Google Chrome browser in an isolated Node.js environment.sematext.com · 2 Oct 2026
SSL monitoring: Synthetics checks certificate validity and expiry, and HTTP monitors also detect certificate changes.sematext.com · 2 Oct 2026
Alerts and integrations: The product page lists Slack, OpsGenie, Zapier, and VictorOps as alert integration examples.sematext.com · 2 Oct 2026
Vercel: The Vercel integration can create a Browser monitor for each selected Vercel project.sematext.com · 2 Oct 2026
Sensitive data: Browser monitor credentials can be stored in AWS Secrets Manager and substituted into scripts only during execution.sematext.com · 2 Oct 2026
Private locations: Private location agents run as Docker containers and can be deployed on machines where Docker runs, including Linux and Windows.sematext.com · 2 Oct 2026
Firewall limitation: Sematext says it does not provide a list of static IP addresses for firewall allowlisting.sematext.com · 2 Oct 2026
HTTP monitor limit: An HTTP monitor run has 128 MB of memory, and its response body is trimmed to 2 MB.sematext.com · 2 Oct 2026
Support: The product page says support is available through email, live chat, and phone calls.sematext.com · 2 Oct 2026
Company history: Sematext's history page says the company launched as Sematext International in Spring 2010.sematext.com · 2 Oct 2026