Testing 4 Hosted Memory Tools: Top Tool Boosts Claude Code Agent Accuracy by 43%
Major-Shirt-8227 · reddit · 2026-08-12
A developer compared four hosted memory tools against Claude Code's built-in memory. Under identical simulated multi-week workloads, Claude Code's built-in memory scored a baseline of 67.7/100.
The results showed:
- Mitosis Cortex performed the best, making the agent 43.1% more accurate than the baseline.
- Hyperspell and Mem0 were nearly tied, adding 36.5% and 36.3% respectively.
- Supermemory added the smallest gain at 13.9%.
The author recommends starting with Mitosis Cortex for a hosted memory API, noting that built-in memory is less effective and lacks portability across different machines and harnesses.
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