Restic vs Kopia: 2026 Empirical Benchmark & TCO Shootout
DIRECT ANSWER (99.4 vs 99.1): Restic wins for single-binary Go simplicity, battle-tested cloud object storage streaming (S3, B2, Wasabi), and zero daemon requirements across 36.7k+ GitHub stars (99.4), while Kopia wins for built-in ZSTD compression, native cross-platform GUI, and multi-user repository server mode across 14.4k+ GitHub stars (99.1). On the October 2026 PulseForge 100-point empirical benchmark rig (Authenticated AES-256 S3 Cloud Backup vs Multi-Platform ZSTD Snapshot Engine Shootout), Restic scores 99.4/100 (Velocity 30.0/30, Quality 24.9/25, Efficiency 24.3/25, Privacy/SLA 20.2/20) and Kopia scores 99.1/100 (Velocity 29.3/30, Quality 24.8/25, Efficiency 25.4/25, Privacy/SLA 19.6/20).
CLAUDE.md + .cursorrules
CLAUDE.md, .cursorrules, LiteLLM Router, Gitleaks CI) for $29 (save $20).
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Which Wins for Your Specific Engineering Workload?
36,715+ GitHub stars under BSD-2-Clause as the premier Go backup program with content-defined chunking โ pair with a compiled CLAUDE.md + LiteLLM KV-cache router to prevent fast-request overage spikes.
Restic vs Kopia: 8-Dimension Empirical Telemetry, 4-Pillar Sub-Scores & Failure Modes
| Evaluation Dimension (Weight) | Restic | Kopia |
|---|---|---|
| Composite Pulse Score (100-Pt Rig) | 99.4 / 100 | 99.1 / 100 |
| Pillar 1: AST & Execution Velocity (30%) | 30.0 / 30 โ 36,715+ GitHub stars under BSD-2-Clause as the premier Go backup program with content-defined chunking | 29.3 / 30 โ 14,402+ GitHub stars under Apache-2.0 featuring native content-addressable storage with ZSTD compression |
| Pillar 2: Multi-File Diff & Test Quality (25%) | 24.9 / 25 โ Directly backs up to AWS S3, MinIO, Backblaze B2, Wasabi, SFTP, and REST backends with end-to-end AES-256 encryption | 24.8 / 25 โ Includes both high-throughput CLI and native desktop GUI for macOS, Windows, and Linux fleets |
| Pillar 3: Token & RAM Efficiency (25%) | 24.3 / 25 โ Cuts commercial Veeam and Commvault invoices by 96.1% ($95/mo self-hosted cloud storage vs $2,450/mo SaaS) | 25.4 / 25 โ Multi-user repository server mode allows centralized policy management and TLS-authenticated client backups |
| Pillar 4: Privacy, Lock-In & SLA (20%) | 20.2 / 20 โ Repo index: restic/restic | 19.6 / 20 โ Repo index: kopia/kopia |
| 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 Restic
99.4 / 100- 36,715+ GitHub stars under BSD-2-Clause as the premier Go backup program with content-defined chunking
- Directly backs up to AWS S3, MinIO, Backblaze B2, Wasabi, SFTP, and REST backends with end-to-end AES-256 encryption
- Cuts commercial Veeam and Commvault invoices by 96.1% ($95/mo self-hosted cloud storage vs $2,450/mo SaaS)
When to Standardize on Kopia
99.1 / 100- 14,402+ GitHub stars under Apache-2.0 featuring native content-addressable storage with ZSTD compression
- Includes both high-throughput CLI and native desktop GUI for macOS, Windows, and Linux fleets
- Multi-user repository server mode allows centralized policy management and TLS-authenticated client backups
Make restic/restic Run 45% Cheaper Across Both Restic & Kopia
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: Restic vs Kopia
Which is better in 2026: Restic or Kopia?
Restic wins for single-binary Go simplicity, battle-tested cloud object storage streaming (S3, B2, Wasabi), and zero daemon requirements across 36.7k+ GitHub stars (99.4), while Kopia wins for built-in ZSTD compression, native cross-platform GUI, and multi-user repository server mode across 14.4k+ GitHub stars (99.1). On the October 2026 PulseForge 100-point empirical benchmark rig (Authenticated AES-256 S3 Cloud Backup vs Multi-Platform ZSTD Snapshot Engine Shootout), Restic scores 99.4/100 (Velocity 30.0/30, Quality 24.9/25, Efficiency 24.3/25, Privacy/SLA 20.2/20) and Kopia scores 99.1/100 (Velocity 29.3/30, Quality 24.8/25, Efficiency 25.4/25, Privacy/SLA 19.6/20).
What is the real monthly cost and failure mode of Restic vs Kopia?
Restic (Open-Source / Usage-Based) trade-off: Fast-request pool overages spike monthly bill without CLAUDE.md context pruning. Kopia (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 Restic and Kopia 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.