Comparison
Humalike vs Letta.
Letta goes deep on agent memory. Humalike sells the full behavioral stack — memory is one piece of seven.
Them
Letta
Stateful agent runtime
Born from the MemGPT paper (Packer & Wooders, UC Berkeley Sky Lab, 2023). Apache-2.0 core. Memory blocks, sleep-time compute, multi-agent shared memory. Also ships Letta Code — a memory-first coding agent.
Us
Humalike
Behavioral infrastructure
A behavioral layer — turn-taking, norms, persona, theory of mind, social signals, memory — composed under any LLM. Built for multi-party social rooms with humans.
The core differences.
No feature-checklist arms race. Just the dimensions that decide which one fits — with the honest call on each.
Letta
Humalike
Deep agent memory architecture
Memory blocks + sleep-time consolidation.
Relational memory primitive — one of seven.
Deep agent memory architecture
Letta
Memory blocks + sleep-time consolidation.
Humalike
Relational memory primitive — one of seven.
Behavioral primitives beyond memory
Tools + subagents, no behavior APIs.
Turn-taking, norms, persona, ToM, signals, observability, memory.
Behavioral primitives beyond memory
Letta
Tools + subagents, no behavior APIs.
Humalike
Turn-taking, norms, persona, ToM, signals, observability, memory.
Multi-human rooms
Multi-agent shared memory, not multi-human rooms.
Native multi-party with humans.
Multi-human rooms
Letta
Multi-agent shared memory, not multi-human rooms.
Humalike
Native multi-party with humans.
Turn-taking primitive
Turn-taking primitive
Letta
Humalike
Native real-time voice runtime
Voice via Vapi / LiveKit integrations (experimental).
Real-time voice runtime built in.
Native real-time voice runtime
Letta
Voice via Vapi / LiveKit integrations (experimental).
Humalike
Real-time voice runtime built in.
Social signals (typing, edits, pauses)
Social signals (typing, edits, pauses)
Letta
Humalike
Open-source core
Apache 2.0.
Open-source core
Letta
Apache 2.0.
Humalike