Checkly vs Sysmos

Checkly9.1Visit Sysmos8.8Visit

Higher score Checkly #4 in API Monitoring Tools 9.1/10 Free plan Free plan✓ 0 of 4 features Visit Checkly

vs

Sysmos #7 in API Monitoring Tools 8.8/10 Free plan · 14-day trial Free planFree trial✓ 3 of 4 features Visit Sysmos

• Checkly fits best

  API plus full-stack synthetic monitoring

• Sysmos fits best

  High-volume synthetic API monitoring

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Side by side

Feature	Checkly 9.1/10 Visit ↗	Sysmos 8.8/10 Visit ↗
At a glance
Editor score	9.1	8.8
Ranking	#4 in API Monitoring Tools	#7 in API Monitoring Tools
Best for	API plus full-stack synthetic monitoring	High-volume synthetic API monitoring
Pricing model	Free plan + paid	Free plan + paid
Starting price	$24/mo (best)	$29/mo
Free plan	✓	✓
Free trial	—	14 days
Deployment	Cloud	Cloud
Platforms	Web	Web, Linux
Support	Email, Live chat, Community, Docs · 24/7	Email, Docs
Integrations	20 integrations	6 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Enterprise
Features Checkly 0/4 · Sysmos 3/4
Response assertions	Not checked yet	✓ (best)
Multi-region checks	Not checked yet	✓ (best)
Private locations	Not checked yet	Not checked yet
Incident workflows	Not checked yet	✓ (best)
Specs
Check frequency	10 sec	Not checked yet
Monitor limit	Not checked yet	100 monitors
Our review
Pros	API, multistep, browser, Playwright, and infrastructure checks Free Hobby plan with uptime monitoring and core alerting Monitoring as code with CLI, Terraform, and Pulumi	Multi-region checks with timing breakdowns and response assertions Multi-step flows support variable extraction and configurable retries Slack, Discord, PagerDuty, email, and webhook alert integrations
Cons	Starter begins at $24 per month The wider scope may exceed simple API monitoring needs Private locations start on the Team plan	The Free plan allows only 10 API monitors Custom regions, SSO, audit logs, and SLA require Business Linux server observability is centered on the Linux agent
Our verdict	Checkly is a cloud monitoring platform for developers, SREs, and QA teams that need to monitor APIs, websites, services, scheduled jobs, network paths, and infrastructure from global locations. Its API and multistep checks support… Read the review →	Sysmos is a cloud monitoring platform for small teams that combines synthetic API health checks with Linux server observability. Its API monitors support HTTP-based checks, configurable intervals, retries, authentication, response… Read the review →

Strengths and trade-offs

• Checkly — where it wins

  • API, multistep, browser, Playwright, and infrastructure checks
  • Free Hobby plan with uptime monitoring and core alerting
  • Monitoring as code with CLI, Terraform, and Pulumi

  Where it doesn't

  • Starter begins at $24 per month
  • The wider scope may exceed simple API monitoring needs
  • Private locations start on the Team plan

• Sysmos — where it wins

  • Multi-region checks with timing breakdowns and response assertions
  • Multi-step flows support variable extraction and configurable retries
  • Slack, Discord, PagerDuty, email, and webhook alert integrations

  Where it doesn't

  • The Free plan allows only 10 API monitors
  • Custom regions, SSO, audit logs, and SLA require Business
  • Linux server observability is centered on the Linux agent

• Checkly9.1/10 · Free plan

  A broad monitoring platform for API checks, synthetic journeys, infrastructure, and alerting.

  Visit ChecklyFull verdict →
• Sysmos8.8/10 · Free plan · 14-day trial

  A focused API monitoring platform with multi-region checks, flows, and alert routing.

  Visit SysmosFull verdict →