Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
Free tier available
Free tierFrom $5 per 1k API test runs / 12 USD per 1k browser test runs (indicative)
PaidWhat drives the bill
The metric that actually scales your invoice.
Cheap if you already run Grafana Cloud; results are plain Prometheus metrics you already know how to use.
Priced per test run and separately for browser versus API. Costs land inside a wider Datadog contract that is rarely small.
Free tier
Included in the Grafana Cloud free tier with a monthly check allowance.
14-day trial.
Open source
Apache-2.0 (agent)
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Grafana Labs · since 2021
Category standard
Datadog · since 2019
Strengths
Limitations
Best for
Teams already running Grafana Cloud and k6.
Existing Datadog customers who want monitoring in the same pane as their observability data.
All of these integrate with: PagerDuty, Slack, Terraform.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.