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Simple and open, instead of simple and closed. Fathom is a clean, fast, privacy-first analytics service — closed source and cloud only. We offer the same simplicity with an open-source core and a self-hosting option.
| Capability | Fathom | Vitrus |
|---|---|---|
| Cookie-free, no consent banner | ✓ | ✓ |
| Open source | — | Apache-2.0 core |
| Self-hostable | — | ✓ |
| Proactive digest (arrives unasked) | email reports | digest with evidence |
| Clickable query behind every number | — | ✓ |
| AI referral ↔ AI crawler split | — | ✓ |
| MCP server for AI agents | — | ✓ |
| Track record | years in production | new |
Features we don't have are shown as “—”. A comparison that hides its own gaps would contradict the one thing this product claims.
If you want a mature managed service that you never have to think about, Fathom is a good choice and their support is quick. They have been profitable and independent for years, which is worth something in this category.
If you want to keep the data on your own infrastructure, read the code, or you need the AI layer.
It does not always. But we think a product whose central claim is "every number carries proof" should have readable code — the claim and the structure ought to match.
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