Engineering Blog

Notes from the build.

How Fathom actually works — benchmarks, memory design, agent orchestration. Written by the people who compile it.

Benchmarks
The benchmark that caught a 31× slowdown
Aug 8, 2026 · Fathom Team
Memory
A memory that remembers: append-only knowledge for research agents
Aug 9, 2026 · Fathom Team
Architecture
Anatomy of a fan-out: one question, a fleet of agents
Aug 10, 2026 · Fathom Team
Verification
Five gates: how we verify every email before it hits the CRM
Aug 10, 2026 · Fathom Team

Numbers you can re-run.

See the benchmarksRead the changelog