Greptile vs Hostile Review

Greptile is an AI code review tool that builds a graph of your entire codebase to provide context-aware PR reviews. It learns from your team's review comments, enforces custom rules in plain English, and generates PR summaries with diagrams. $25M Series A, used by Brex, Substack, Scale AI.

Hostile Review is an adversarial code audit — 100+ specialized AI agents that assume your code is broken and prove where. Not a PR reviewer — a full-codebase adversarial audit across 14 categories.

• Codebase graph — builds a detailed map of how everything connects, enabling context-aware review that understands impact across the entire project
• Learns from your team — reads every engineer's PR comments and tracks reactions to infer team standards. Gets smarter over time
• Custom rules in English — describe your coding standards in plain language or point to a markdown doc. No YAML, no regex
• PR summaries with diagrams — auto-generated change summaries with mermaid diagrams, file breakdowns, and confidence scores
• Speed impact — claims median time to merge dropped from 20 hours to 1.8 hours for their customers
• Self-hostable — deploy in your own AWS environment with custom LLM providers for data sovereignty
• Strong backing — $25M Series A from Benchmark at $180M valuation. Y Combinator alumni

• 100+ agents vs 1 — each agent attacks from a different angle across 14 categories, then findings are deduplicated and consensus-ranked
• Full codebase audit, not just PRs — reviews everything, not just what changed. Catches issues in code that wasn't modified but interacts with what was
• 14 review categories — security, performance, architecture, compliance (GDPR/HIPAA/PCI), AI security, accessibility, i18n, cloud infrastructure
• Adversarial mindset — agents assume hostile intent. They're not reviewing code — they're attacking it
• Cross-file attack chains — finds vulnerabilities that span multiple files where the issue isn't in any single file or PR diff
• No per-seat pricing — a solo developer and a 200-person team pay the same rate per scan
• Compliance-grade depth — dedicated agents for GDPR, HIPAA, PCI-DSS, SOX, and SOC2

Greptile reviews your changes. Every PR gets smart, context-aware feedback that understands your codebase's architecture. It's the best version of "does this PR look good?" — fast, always-on, learns your team's preferences.

Hostile Review attacks your codebase. 100+ agents don't care what changed in the last PR. They scan everything, assume it's broken, and prove where. Security, compliance, performance, architecture — the full adversarial audit.

One makes your PRs better. The other makes sure your codebase survives.