The Front Desk Review

Best Observability Apm · head-to-head

AppSignal vs Datadog APM

A sourced, side-by-side comparison for observability apm. AppSignal has the lower entry price. Every figure links to the public page it was captured from — the vendor's own wherever the vendor publishes the number, otherwise the named public source — with the date we captured it.

AppSignal has the lower entry price — AppSignal starts at $0/mo, Datadog APM at $35/mo. Free tier: AppSignal Yes, Datadog APM No. HIPAA: AppSignal Yes, Datadog APM Yes.

As of 2026-09-05 · figures link to their source below STALE

Side by side

AppSignal

$0/mo entry
Entry price$0/mo (Free)
Free tierYes
HIPAA (BAA)Yes
SOC 2—
GDPRYes
Best forRuby on Rails and Elixir/Phoenix teams wanting first-class language support

Datadog APM

$35/mo entry
Entry price$35/mo (APM Pro (with Infra))
Free tierNo
HIPAA (BAA)Yes
SOC 2Yes
GDPRYes
Best forEnterprises running multi-cloud, multi-language stacks

Sources — AppSignal: appsignal.com (verified 2026-09-05) STALE · 2026-06-14 · Datadog APM: datadoghq.com (verified 2026-09-03)

Key features

AppSignal: Only EU-based APM: infrastructure hosted in EU (AWS EMEA) for GDPR-first teams; ISO 27001 certified with regular third-party penetration testing; HIPAA BAA available as a paid add-on with PHI protection and breach notification; APM + error tracking + logging + uptime monitoring in a single platform; Unlimited apps, hosts, and team members on all plans

Datadog APM: Watchdog AI for automated anomaly detection and root cause analysis; End-to-end distributed tracing correlated with logs, metrics, and infrastructure; Continuous Profiler for code-level CPU/memory/IO visibility in production; Change tracking correlates deploys and feature flags with performance regressions; Native and hybrid OpenTelemetry ingestion with remote sampling controls

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