SigNoz vs Uptrace vs Highlight: Which Open-Source Observability Stack in 2026?

For teams wanting genuinely open-source, self-hostable observability without assembling Prometheus + Loki + Tempo + Grafana themselves, a newer generation of unified, OpenTelemetry-native platforms has emerged. Here is an honest comparison of the three most commonly evaluated.

Quick Comparison

SigNoz

SigNoz is the most mature and widely adopted of the three, positioning itself as a genuine open-source alternative to Datadog/New Relic, built on ClickHouse for cost-efficient storage at scale.

# docker-compose for self-hosted SigNoz
services:
  signoz:
    image: signoz/signoz:latest
  clickhouse:
    image: clickhouse/clickhouse-server:latest
  otel-collector:
    image: signoz/signoz-otel-collector:latest

# Instrument your app with standard OpenTelemetry, point at SigNoz's collector
exporters:
  otlp:
    endpoint: signoz-otel-collector:4317

SigNoz strengths:

• Most polished, APM-style UI of the three — service maps, trace waterfalls, and dashboards feel closest to a commercial product's UX
• Largest community and most active development pace among open-source OTel-native platforms
• ClickHouse backend gives genuinely good query performance and storage cost efficiency at scale compared to Elasticsearch-based alternatives
• Both self-hosted (free) and managed cloud offering exist, giving a migration path if self-hosting becomes a burden

SigNoz weaknesses:

• Self-hosting the full stack (SigNoz + ClickHouse + OTel Collector) has real operational weight — not a five-minute setup
• Some advanced features are gated to the paid/enterprise tier, worth checking against your specific needs before committing
• ClickHouse operational knowledge is a real prerequisite for running this reliably at scale yourself

When to use SigNoz: You want the most feature-complete, polished open-source observability UI and are willing to operate ClickHouse yourself, or use their managed cloud.

Uptrace

Uptrace is the leanest of the three — genuinely simple self-hosting (a single binary option exists) while still being fully OpenTelemetry-native with metrics, logs, and traces unified.

# Genuinely simple self-hosted setup — single binary option
docker run -p 14318:14318 -p 14317:14317 uptrace/uptrace:latest

# OpenTelemetry SDK config — same OTLP standard, points at Uptrace instead
exporters:
  otlp:
    endpoint: uptrace:14317

Uptrace strengths:

• Simplest self-hosted footprint of the three — meaningfully lower resource requirements and setup complexity, appealing for smaller teams or homelab-scale deployments
• Clean, focused UI without the feature sprawl some competitors accumulate
• Fully OTel-native design from day one, no legacy non-OTel instrumentation paths to work around

Uptrace weaknesses:

• Smaller community and slower feature development pace than SigNoz's
• Less mature APM-style visualization (service maps, advanced trace analysis) compared to SigNoz's more built-out UI
• BSL license (converts to Apache after a time delay per version) is worth understanding for your specific compliance/legal review, different from SigNoz's more straightforward open-source licensing on the core product

When to use Uptrace: You want the lowest-overhead self-hosted OTel-native observability stack and don't need SigNoz's more built-out APM UI features.

Highlight

Highlight differentiates by tightly integrating frontend session replay with backend traces and logs — genuinely useful for teams whose primary debugging pain is "what did the USER actually experience" not just backend metrics.

// Frontend SDK — captures session replay alongside standard OTel instrumentation
import { H } from 'highlight.run';
 
H.init('YOUR_PROJECT_ID', {
  tracingOrigins: true,
  networkRecording: { enabled: true, recordHeadersAndBody: true },
});

Highlight strengths:

• Session replay tightly correlated with backend traces is a genuinely different capability than the other two — seeing exactly what a user clicked/saw right before a backend error occurred is a distinct debugging superpower for frontend-heavy applications
• Full-stack view spanning frontend errors, session replay, and backend traces/logs in one correlated timeline
• Growing fast in the frontend-observability-specific niche, less direct overlap with SigNoz/Uptrace's backend-first focus

Highlight weaknesses:

• Less of a general backend APM competitor to SigNoz — its strength is specifically the frontend-to-backend correlation, not raw backend trace analysis depth
• Smaller and newer than SigNoz's ecosystem
• Session replay storage (video-like data) has different, often higher, storage cost characteristics than pure metrics/traces — worth modeling before committing to self-hosting at scale

When to use Highlight: Frontend-heavy applications where correlating user session replay with backend errors is your primary debugging need, not just backend service observability.

The Honest Verdict

Most feature-complete, polished open-source APM alternative: SigNoz. The safest default if you want something closest to a commercial APM product's UX, self-hosted.

Want the simplest possible self-hosted OTel-native stack: Uptrace. Lower operational overhead, leaner resource footprint, at the cost of a less mature UI.

Frontend-heavy app, need session replay correlated with backend traces: Highlight. A genuinely different capability the other two don't offer.

All three are legitimate alternatives to assembling Prometheus+Loki+Tempo+Grafana yourself — pick based on whether backend APM depth (SigNoz), self-hosting simplicity (Uptrace), or frontend session correlation (Highlight) matches your actual debugging pain point.

More observability comparisons? Read our Honeycomb vs Grafana Cloud vs Chronosphere and OpenTelemetry Collector vs Vector vs Fluent Bit.