SourcePrep vs. Greptile
Greptile paved the way for codebase RAG by offering a powerful cloud-based API. But basic vector search fails to give autonomous agents the structural awareness they need to succeed. SourcePrep is built to deliver deep epistemic tracing and superior context intelligence—giving your AI the "what, why, when, and how" without ever letting your codebase leave your control.
What is the difference between SourcePrep and Greptile?
The primary difference is architecture and epistemic depth. Greptile relies on naive cloud search, requiring you to upload your entire codebase to their servers. SourcePrep is an epistemic context engine with Private by Design architecture. SourcePrep uses a Rust daemon to parse your code into a meticulous structural trace graph. It integrates natively with your agentic tools (like Paperclip or Cursor) via the Model Context Protocol (MCP). With SourcePrep, you get zero-latency context assembly, role-aware routing, and Sovereign Context—your source code is never unknowingly transmitted.
Feature Comparison Matrix
| Capability | SourcePrep | Greptile |
|---|---|---|
| Architecture | Private by Design (Sovereign Context) | Cloud-hosted API |
| Data Privacy | Code never leaves your network | Requires cloud upload/GitHub sync |
| Indexing Method | Vector + Traced Epistemic Graph | Vector + Cloud parsing |
| Bring Your Own Key (BYOK) | Yes (No markup) | No |
| IDE Integration | Native MCP (Cursor, Windsurf, Claude) | Custom Extensions |
| Air-Gapped Support | Yes (Enterprise) | No |
1. The Security Paradigm: Sovereign Context
Greptile provides excellent answers, but it requires syncing your GitHub repositories to their cloud infrastructure. For many regulated industries (finance, healthcare, defense) or core IP companies, this violates SOC2 and ISO27001 policies.
SourcePrep provides Sovereign Context. It uses locally-run Rust to build the epistemic graph and open-weight ONNX models to embed it. Your code remains exactly where it belongs: under your complete control.
2. Integration via MCP
Instead of forcing you into a proprietary web dashboard or a clunky VS Code extension, SourcePrep embraces the open Model Context Protocol (MCP).
Once the SourcePrep engine is running, any MCP-compatible client—like Paperclip, Cursor, or the Claude Code App—can instantly extract structural knowledge. Your agents automatically invoke SourcePrep to fetch the exact epistemic context they need to execute tasks flawlessly.
3. Cost and BYOK
Cloud indexers often charge steep per-seat monthly fees and mark up token costs. SourcePrep offers a perpetual license option and fully supports Bring Your Own Key (BYOK) for inference. Connect Ollama Cloud for high-tier privacy, or use Anthropic Claude Sonnet and pay exactly what the API costs.
See it in action
SourcePrep delivers structural context to your AI agent in real time — right inside your terminal.