Assert vs Better Uptime#

Better Uptime (by Better Stack) is uptime monitoring with incident management attached: on-call schedules, escalation policies, status pages. Assert checks whether the API returned the right JSON.

Overview#

When to Choose Assert#

• Deep API validation: assert on values, types, and structure
• GraphQL monitoring: first-class query and mutation support
• Response assertions: JSONPath, headers, and response time thresholds
• Multiple assertions per monitor: check several fields on one endpoint
• Lower cost: 30 monitors for $23/mo

If what the API returns matters more than the incident workflow around an outage, Assert is the closer fit.

When to Choose Better Uptime#

• Incident management: built-in incident workflows
• Status pages: public-facing service status
• On-call scheduling: native rotation management
• Multi-channel monitoring: HTTP, TCP, DNS, etc.
• Unified platform: monitoring + incidents in one tool

Better Uptime keeps monitoring, status pages, and incident management in one tool, so you wire nothing together.

Feature Comparison#

Response Validation#

Assert:

• ✅ JSONPath assertions ($.data.status == "active")
• ✅ Header validation
• ✅ Response time thresholds
• ✅ JSON schema validation
• ✅ Multi-assertion per monitor

Better Uptime:

• ✅ Keyword presence/absence
• ✅ Status code validation
• ❌ No JSON parsing
• ❌ No path-based assertions
• ❌ No response time assertions

Monitoring Capabilities#

Assert:

• REST API validation (all methods)
• GraphQL queries and mutations
• Custom headers & authentication
• Response body assertions
• Multi-region checks (6 regions)

Better Uptime:

• HTTP/HTTPS monitoring
• TCP/UDP port checks
• DNS monitoring
• Cron job monitoring
• Heartbeat monitoring
• Multi-region checks (10+ regions)

Incident Management#

Assert:

• Integrates with PagerDuty, Opsgenie
• Slack/Discord notifications
• Email alerts
• Webhook callbacks

Better Uptime:

• Built-in incident timeline
• On-call schedules
• Escalation policies
• Incident postmortems
• Call routing

Status Pages#

Assert:

• Custom status pages included
• Uptime history display
• Component status

Better Uptime:

• Public & private status pages
• Subscriber notifications
• Custom branding
• Scheduled maintenance

Pricing#

Assert:

Better Uptime:

Real-World Comparison#

Scenario: Payment API Monitoring#

Your payment processing API returns:

{
  "transaction_id": "txn_123",
  "status": "completed",
  "amount": 99.99,
  "currency": "USD"
}

Better Uptime:

• Can check if endpoint returns 200
• Can verify "completed" appears in response

Assert:

• Can verify $.status == "completed"
• Can verify $.amount is a positive number
• Can verify $.currency is one of allowed values
• Can check response time is under threshold
• Can validate the entire JSON structure

Scenario: Incident Response#

When your API goes down:

Better Uptime:

1. Creates incident automatically
2. Pages on-call team member
3. Shows on status page (if configured)
4. Tracks incident timeline
5. Supports postmortem

Assert:

1. Sends alert to PagerDuty/Opsgenie
2. Notifies Slack/Discord/Teams
3. Updates status page (if configured)
4. Incident management via integrated tools

Integration Approach#

Assert does API monitoring and hands the rest off:

• Incident management: PagerDuty, Opsgenie
• Team chat: Slack, Discord, Teams
• Workflows: Webhooks for custom automation

Better Uptime keeps the rest in-house:

• Built-in incident management
• Built-in on-call scheduling
• Built-in status pages
• Fewer external integrations needed

When to Use Both#

Pair them:

• Better Uptime for infrastructure monitoring, status pages, and incident management
• Assert for API response validation and contract testing

Incidents or assertions#

Better Uptime bundles incident timelines, escalation policies, and postmortems with its uptime monitoring and status pages.

Assert verifies what came back in the body, down to individual field values, types, and response time. Paid plans start at $8/mo.

Try Assert free — no credit card required.