What are the best free alternatives to Hindsight?

Engram, Friday, OKF Agent Memory, Obsidian Mind, Mem0. All are reviewed on Stack Gems in the same category (agent memory tools); 8 free or open source.

Is there an open-source alternative to Hindsight?

Yes: Engram (OSS/MIT), Friday (OSS/MIT), OKF Agent Memory (OSS/MIT), Obsidian Mind (OSS/MIT).

Alternatives · Memory & Evals

Hindsight alternatives (2026)

Hindsight: MIT agent memory when you want retain→recall→reflect (+ MCP) you can self-host; keep Cloud optional and do not bet the stack on a single eval leaderboard.

Its Catch: Vs Mem0, Graphiti, Engram, and Supermemory: Hindsight is a retain/recall/reflect memory product with optional hosted Cloud/Enterprise, not a general memory SDK alone, a temporal knowledge graph, a local binary brain, or a speed-first memory API.

Below: 8 free or free-tier tools from the same category (agent memory tools), free and open source first, then the closest match by shared tags. Each keeps its own Catch.

1.EngramMIT persistent agent memory — MCP, CLI, TUI, SQLite
Free / OSS · OSS/MIT · 7.4k GitHub stars
VerdictMIT agent memory primitive. MCP/CLI/TUI on SQLite; not a full agent framework.
CatchVs Mem0 / Letta / full agent frameworks: Engram is the memory primitive (store + retrieve + surfaces), not an orchestration framework or coding agent. “local or cloud” branding means optional hosted/sync gravity — day-one stays OSS you run. You still decide what gets written and when.
2.FridaySelf-hosted cognitive memory MCP for coding agents
Free / OSS · OSS/MIT · 68 GitHub stars
VerdictMIT self-hosted memory MCP. Use when coding agents need durable local memory without Mem0 Cloud.
CatchVs Mem0 / Letta / Graphiti: Friday is the self-hosted MCP memory appliance for coding agents, not a multi-tenant memory API or a full agent OS. You operate Neo4j/Compose and embedding/model keys; star count is still early — pin and verify before production trust.
3.OKF Agent MemoryGit-native dual-memory for agents — OKF v0.2 + embedded MCP
Free / OSS · OSS/MIT · 824 GitHub stars
VerdictMIT git-native agent memory. Use when you want OKF bundles and MCP retrieval without another database.
CatchVs Engram / Mem0 / Supermemory / Letta: OKF is the git-native OKF+AAG dual-memory recipe with MCP, not a hosted memory SaaS or paging OS. You still author the Domain Codex and decide write discipline; empty knowledge/ stays empty.
4.Obsidian MindMIT Obsidian vault as persistent agent memory
Free / OSS · OSS/MIT · 5.4k GitHub stars
VerdictThe most complete plain-Markdown memory setup for Claude Code and friends — free, but opinionated and Obsidian-bound.
CatchIt is opinionated about work life — standups, 1:1s, brag docs, incident capture — so it fits people who want an agent-run work journal, not just a project memory file. Needs Obsidian 1.12+ (a free but closed-source app) with its CLI enabled, plus Node 22+. QMD downloads about 2 GB of local models on first use. Hooks run on every session and message, so read them before you trust a vault. Vs mem0 or Letta: those are memory layers you build into an app; this is a personal vault for your own coding agent.
5.Mem0Memory infrastructure for AI agents that actually persists
Free / OSS · Freemium · 67.4k GitHub stars
VerdictThe memory layer most agent teams should use instead of building.
CatchExternal dependency for a core capability. Async processing adds latency. Platform optimizations are not in the open-source SDK. You are trusting Mem0 with potentially sensitive user data.
6.LettaEpisodic memory for agents that think across sessions
Free / OSS · Apache-2.0 · 25.2k GitHub stars
VerdictThe memory architecture for agents that need to think long-term.
CatchMore complex to reason about than simple vector retrieval. The paging mechanism adds latency and orchestration overhead. Documentation assumes understanding of the original MemGPT paper.
7.GraphitiApache-2.0 temporal knowledge graphs for agent memory; Zep's OSS engine
Free / OSS · Apache-2.0 · 32k GitHub stars
VerdictApache-2.0 temporal memory graphs. Free self-host; Zep Cloud is the paid path.
CatchFramework only — you run a graph DB + ops. Zep Community Edition deprecated; full Zep SaaS is separate (Free credits then Flex ~$104/mo billed annually). Not a drop-in chat history store. Schema/ops cost vs Mem0 Docker.
8.oh-my-hermesMIT Hermes-agent niche tooling — memory & workflows
Free / OSS · OSS/MIT · 3.4k GitHub stars
VerdictMIT Hermes-agent tooling. Niche, not a multi-host skill pack.
CatchHermes-specific — not a generic Claude Code / Codex skill pack. Young surface; expect Hermes Agent as the host and follow upstream Hermes breaking changes. Vs ECC (multi-host ecosystem) and security-audit-skill (Cloudflare audit skill): oh-my-hermes is niche Hermes tooling, not a cross-harness coordination layer or a security scanner.

FAQ

What are the best free alternatives to Hindsight?: Engram, Friday, OKF Agent Memory, Obsidian Mind, Mem0. All are reviewed on Stack Gems in the same category (agent memory tools); 8 free or open source.
What is the catch with Hindsight?: Vs Mem0, Graphiti, Engram, and Supermemory: Hindsight is a retain/recall/reflect memory product with optional hosted Cloud/Enterprise, not a general memory SDK alone, a temporal knowledge graph, a local binary brain, or a speed-first memory API.
Is there an open-source alternative to Hindsight?: Yes: Engram (OSS/MIT), Friday (OSS/MIT), OKF Agent Memory (OSS/MIT), Obsidian Mind (OSS/MIT).

Hindsight alternatives (2026)

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