Back to Arena

xmemory

by xmemory Inc.

System Card

Organizationxmemory Inc.
Released2026-03
Architectureknowledge-base / Schema-based natural-language to structured state
Detailsxmemory provides typed, schema-backed memory for AI agents. Agents read and write memory in plain natural language while xmemory maps writes onto a user-defined schema (existing systems, generated, or hand-described) and stores them as validated, typed, linked, deduplicated facts. Retrieval returns consistent structured state across tasks and systems. Integrates with LangChain, Pydantic AI, Mastra, Google ADK, and n8n via MCP, REST API, and Python/TypeScript SDKs. Founded by Alex Petrov (ex-Yandex search infrastructure); London-based; out of stealth March 2026 with a $4M pre-seed led by Fly Ventures.
Parameters—
Domainagent-memoryknowledge-graphpersonalization
Open SourceNo
WebsiteVisit
schema-basedstructured-memorytyped-statededuplicationmcpclosed-betalondonagent-memory

Capability Profile

Benchmark Scores

6 of 14 benchmarks
Data Transparency:6 estimated
Long-Context Retrieval
0/5
RULER
no data
NIAH
no data
LooGLE
no data
LongBench
no data
∞Bench
no data
Multi-Turn Recall
2/2
LoCoMo
85.196pEstimated
MemoryBank
80.581pEstimated
Cross-Session Memory
1/1
LongMemEval
86.697pEstimated
Multi-Hop QA
2/3
BABILong
no data
MultiHop-RAG
7579pEstimated
HotpotQA
8298pEstimated
Agent Task Memory
1/1
AgentBench-Mem
7226pEstimated
Personalization
0/1
PerLTQA
no data
Factuality / Grounding
0/1
RAGAS
no data
Sources:Arena estimate — derived from capability profile, not independently verified