API testing and monitoring: define HTTP requests with assertions, run them on a schedule or after each deploy, and get alerted when a check fails.
Pricing and hosting
- Pricing
- Free plan
- Open source
- No
- Self-hosted
- No
- Launched
- 2016
- Status
- Active
- Website
- assertible.com
Plans and prices change; check the tool's own site before you decide.
What it does
Uptime and synthetic monitoring checklist
4 of 10 confirmed in Assertible's own documentation. The same checklist is used for every tool in Uptime.
- HTTP checks Yes
- Keyword checks Yes
- SSL certificate expiry Not confirmed
- TCP port checks Not confirmed
- Ping checks Not confirmed
- DNS checks Not confirmed
- Multi-location checks Not confirmed
- Checks every minute or faster Yes
- Browser or multi-step checks Yes
- Status page Not confirmed
HTTP/API tests only; multi-step via setup steps
Checked against: assertible.com, assertible.com (2), assertible.com (3), assertible.com (4)
Alternatives to Assertible
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Catchpoint Enterprise internet performance monitoring: synthetic tests run from backbone, cloud and ISP nodes worldwide, alongside real user and BGP monitoring. -
CheckCle Self-hosted open source monitor for HTTP, ping, TCP and DNS uptime, server metrics and SSL expiry, with incident tracking and public status pages. -
Checkly Synthetic monitoring for developers: API checks and Playwright browser checks written as code, deployed from CI and run from many regions. -
Checkmate Self-hosted open source monitor from BlueWave Labs for HTTP, ping, TCP port, DNS, WebSocket and gRPC checks, with an optional agent for server hardware metrics and status pages. -
Cloudprober Active prober that started at Google: runs HTTP, DNS, ping, TCP, gRPC and custom probes and exports latency and success metrics to Prometheus and other backends. -
Dotcom-Monitor Synthetic monitoring for websites, web applications, APIs and servers, including recorded multi-step browser transactions and load testing. -
Downtime Monkey Website uptime monitoring with downtime alerts and a generous free plan, aimed at small sites and people watching many client websites. -
FlareWarden Uptime, SSL, DNS and page-content monitoring that confirms an outage from several regions before alerting, with cron checks and status pages. -
Gatus Health dashboard configured in YAML: checks HTTP, TCP, DNS, ICMP and other endpoints against conditions on status, body and latency, and alerts to many channels. Also sold as a hosted service.