Thuban vs DeepSource
Cloud analysis vs. local-first AI detection.
DeepSource is a cloud-based automated code review platform — it analyses your code on their infrastructure after you connect your repository. Thuban is local-first: your code never leaves your machine. And while DeepSource catches traditional code quality issues, only Thuban detects the AI-era problems that are flooding modern codebases.
Feature Comparison
| Feature | Thuban | DeepSource |
|---|---|---|
| Local-first (code stays on your machine) | ✓ | ✗ |
| Zero config setup | ✓ | ✗ |
| AI hallucination detection | ✓ | ✗ |
| Phantom import detection | ✓ | ✗ |
| Mother Code DNA | ✓ | ✗ |
| Hallucination detection | ✓ | ✗ |
| Auto-fix | ✓ | ✓ |
| Multi-language support | ✓ | ✓ |
| CI/CD integration | ✓ | ✓ |
| Health score & grade | ✓ | Metrics only |
| Tech debt cost (£/month) | ✓ | ✗ |
| Codebase comparison (Compare) | ✓ | ✗ |
| No account required | ✓ | ✗ |
| Price | Free / £49/mo | Free (OSS) / $12+/user/mo |
What DeepSource Can't Detect
DeepSource is a solid traditional code analysis tool. But these AI-era problems are outside its detection capabilities:
AI Hallucinations
AI generates functions, imports, and API calls that don't exist. DeepSource's analysers check for anti-patterns and bugs — but they have no concept of hallucinated code that AI confidently invented.
Phantom Imports
AI confidently imports packages that don't exist in your dependency tree. DeepSource checks code quality within files but doesn't verify that every import resolves to a real, installed package.
Code Leaves Your Machine
DeepSource requires repository access and analyses code on their cloud infrastructure. For teams with proprietary code or compliance requirements, this creates unnecessary risk.
Architecture Drift
AI generates code that works in isolation but drifts from your established patterns. DeepSource checks individual files against generic rules — it doesn't understand your codebase's architectural DNA.
Deprecated AI Patterns
AI models trained on outdated data generate deprecated code patterns. DeepSource catches some anti-patterns but doesn't specifically target the stale patterns AI tools produce.
Per-Seat Pricing
DeepSource charges per user per month. As your team grows, costs scale linearly. Thuban's Pro plan is a flat £49/month — no per-seat games, no surprise bills.
Why Developers Choose Thuban
Your Code Stays Local
Thuban runs entirely on your machine. No repository connections, no cloud uploads, no third-party access to your source code. Your intellectual property stays yours.
AI Hallucination Detection
Thuban was purpose-built for the problems AI coding tools create: hallucinated imports, invented APIs, deprecated patterns from stale training data, and code that compiles but doesn't work.
Zero Config, No Account
No GitHub app installation, no repository connection, no .deepsource.toml configuration file. Run npx thuban scan . and get a full health report in seconds.
Mother Code DNA
Thuban learns your codebase's unique patterns and flags when AI-generated code deviates from your architecture. DeepSource applies generic analysers — not your specific patterns.
Flat Pricing
Thuban Pro is £49/month. Not per seat. Not per repository. Not per line of code. One price, unlimited scans, unlimited team members. DeepSource's per-user pricing adds up fast.
Real Cost in Real Money
Thuban gives you tech debt cost in pounds per month — a number your CTO can act on. DeepSource gives you issue counts and severity levels. Numbers without context don't drive action.
Analyse Locally. Detect Everything.
Run Thuban on any codebase. No cloud, no signup, no config, no credit card.