Harness Memory

Key facts: Harness Memory launched on Product Hunt on November 12, 2026, placing #7. It gives every harness agent its own long-term memory: pick a memory engine (Mem0, Graphiti, Hindsight, ReMe, or your own) and plug it into different agent harnesses, like Claude Code, Codex and Hermes. Memory can be shared across agent harnesses, with fine-grained access control. It is open source in the Community Edition and available on HarnessRouter Cloud.

Plans: Free and open source (Apache 2.0) in the Community Edition. HarnessRouter Cloud is the managed option: check the official site for current pricing.

Best for: Product teams embedding coding agents who need memory that survives across sessions and harnesses. Who should skip it: anyone running a single agent in one session at a time.

Pros

• Free and open source under Apache 2.0
• One memory layer across Claude Code, Codex and Hermes
• Pick your engine: Mem0, Graphiti, Hindsight, ReMe or your own
• Shared memory with fine-grained access control

Watch out for

• You run the Community Edition yourself, or pay for Cloud
• Memory quality still depends on the engine you pick
• Built for product teams, not single-agent hobby use

Best for

Product teams embedding coding agents who need memory that survives across sessions and harnesses. Who should skip it: anyone running a single agent in one session at a time.

Pricing

Free and open source (Apache 2.0) in the Community Edition. HarnessRouter Cloud pricing on the official site.

FAQs

What is Harness Memory? Long-term memory for agents, across every harness: pick a memory engine and plug it into Claude Code, Codex, Hermes and more, with memory shared across harnesses.

Is Harness Memory free? Yes. The Community Edition is free and open source under Apache 2.0. HarnessRouter Cloud is the managed option.

Which memory engines can I use? Mem0, Graphiti, Hindsight, ReMe, or your own.

Can agents share memory? Yes. Memory can be shared across agent harnesses, with fine-grained access control.