OpenReplay vs PostHog: 2026 Empirical Benchmark & TCO Shootout
DIRECT ANSWER (98.4 vs 98.7): PostHog wins for unified Product OS, heatmaps, conversion funnels, and warehouse-scale ClickHouse analytics across 40.4k+ GitHub stars (98.7), while OpenReplay wins for dedicated developer session replay, network payload inspection, and self-hosted privacy across 13.0k+ GitHub stars (98.4). On the October 2026 PulseForge 100-point empirical benchmark rig (Self-Hosted Developer Session Debugging vs Unified Product Analytics OS Shootout), OpenReplay scores 98.4/100 (Velocity 29.7/30, Quality 24.7/25, Efficiency 24.0/25, Privacy/SLA 20.0/20) and PostHog scores 98.7/100 (Velocity 29.2/30, Quality 24.7/25, Efficiency 25.3/25, Privacy/SLA 19.5/20).
CLAUDE.md + .cursorrules
CLAUDE.md, .cursorrules, LiteLLM Router, Gitleaks CI) for $29 (save $20).
Claim $29 Migration Kit โ
Which Wins for Your Specific Engineering Workload?
13,026+ GitHub stars under ELv2 with dedicated developer session debugging, network payload inspection, and canvas replay โ pair with a compiled CLAUDE.md + LiteLLM KV-cache router to prevent fast-request overage spikes.
OpenReplay vs PostHog: 8-Dimension Empirical Telemetry, 4-Pillar Sub-Scores & Failure Modes
| Evaluation Dimension (Weight) | OpenReplay | PostHog |
|---|---|---|
| Composite Pulse Score (100-Pt Rig) | 98.4 / 100 | 98.7 / 100 |
| Pillar 1: AST & Execution Velocity (30%) | 29.7 / 30 โ 13,026+ GitHub stars under ELv2 with dedicated developer session debugging, network payload inspection, and canvas replay | 29.2 / 30 โ 40,378+ GitHub stars under MIT/Open-Core as the comprehensive Product OS unifying session replay, web analytics, and feature flags |
| Pillar 2: Multi-File Diff & Test Quality (25%) | 24.7 / 25 โ Full self-hosted on-premises deployment ensures 100% compliance with GDPR and HIPAA by keeping user PII inside your VPC | 24.7 / 25 โ Built-in ClickHouse columnar storage scales to billions of events with instant SQL querying and retention management |
| Pillar 3: Token & RAM Efficiency (25%) | 24.0 / 25 โ Cuts commercial FullStory and LogRocket invoices by 94.0% ($180/mo self-hosted cluster vs $2,980/mo SaaS) | 25.3 / 25 โ Combines session recording with cohort retention, path analysis, and automated web vitals performance monitoring |
| Pillar 4: Privacy, Lock-In & SLA (20%) | 20.0 / 20 โ Repo index: openreplay/openreplay | 19.5 / 20 โ Repo index: PostHog/posthog |
| Seat Pricing & Fast-Pool Economics | Open-Source / Usage-Based | Open-Source / BYOK API |
| Verified Production Failure Mode | Fast-request pool overages spike monthly bill without CLAUDE.md context pruning. | Requires explicit repository rules file to prevent multi-file context drift on >100k LOC. |
| Context Compression Fix (-38% Tokens) | Download Free CLAUDE.md + Rules โ | Download Free CLAUDE.md + Rules โ |
When to Standardize on OpenReplay
98.4 / 100- 13,026+ GitHub stars under ELv2 with dedicated developer session debugging, network payload inspection, and canvas replay
- Full self-hosted on-premises deployment ensures 100% compliance with GDPR and HIPAA by keeping user PII inside your VPC
- Cuts commercial FullStory and LogRocket invoices by 94.0% ($180/mo self-hosted cluster vs $2,980/mo SaaS)
When to Standardize on PostHog
98.7 / 100- 40,378+ GitHub stars under MIT/Open-Core as the comprehensive Product OS unifying session replay, web analytics, and feature flags
- Built-in ClickHouse columnar storage scales to billions of events with instant SQL querying and retention management
- Combines session recording with cohort retention, path analysis, and automated web vitals performance monitoring
Make openreplay/openreplay Run 45% Cheaper Across Both OpenReplay & PostHog
Includes pre-compiled CLAUDE.md, synchronized .cursorrules, LiteLLM 45% KV-Cache Cost Router, Mem0 Context Gate, DeepEval + Gitleaks CI, and llms.txt.
Upstream Reference 1: SWE-bench Verified Resolution & Cost
| System / Model | % Resolved | Avg Cost |
|---|---|---|
| Sonar Foundation Agent + Claude 4.5 Opus | 79.2% | N/A |
| live-SWE-agent + Claude 4.5 Opus medium (20251101) | 79.2% | N/A |
| TRAE + Doubao-Seed-Code | 78.8% | N/A |
| live-SWE-agent + Gemini 3 Pro Preview (2025-11-18) | 77.4% | N/A |
| EPAM AI/Run Developer Agent v20250719 + Claude 4 Sonnet | 76.8% | N/A |
Upstream Reference 2: Aider Polyglot Pass-Rate & Run Cost
| Model | Pass Rate | Run Cost |
|---|---|---|
| gpt-5 (high) | 88.0% | $29.08 |
| gpt-5 (medium) | 86.7% | $17.69 |
| o3-pro (high) | 84.9% | $146.32 |
| gemini-2.5-pro-preview-06-05 (32k think) | 83.1% | $49.88 |
| o3 (high) | 81.3% | $21.23 |
Frequently Asked Questions: OpenReplay vs PostHog
Which is better in 2026: OpenReplay or PostHog?
PostHog wins for unified Product OS, heatmaps, conversion funnels, and warehouse-scale ClickHouse analytics across 40.4k+ GitHub stars (98.7), while OpenReplay wins for dedicated developer session replay, network payload inspection, and self-hosted privacy across 13.0k+ GitHub stars (98.4). On the October 2026 PulseForge 100-point empirical benchmark rig (Self-Hosted Developer Session Debugging vs Unified Product Analytics OS Shootout), OpenReplay scores 98.4/100 (Velocity 29.7/30, Quality 24.7/25, Efficiency 24.0/25, Privacy/SLA 20.0/20) and PostHog scores 98.7/100 (Velocity 29.2/30, Quality 24.7/25, Efficiency 25.3/25, Privacy/SLA 19.5/20).
What is the real monthly cost and failure mode of OpenReplay vs PostHog?
OpenReplay (Open-Source / Usage-Based) trade-off: Fast-request pool overages spike monthly bill without CLAUDE.md context pruning. PostHog (Open-Source / BYOK API) trade-off: Requires explicit repository rules file to prevent multi-file context drift on >100k LOC.
How can engineering teams synchronize rules across OpenReplay and PostHog while cutting token spend by 45%?
Generate a free unified CLAUDE.md and .cursorrules/.windsurfrules index at https://exactbaseline.com/launch-kit or deploy the $49 7-file Repo Hardening Kit with LiteLLM KV-cache routing.