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Head to head · Agent memory · October 2026 research run

Hindsight vs MemPalace

MemPalace scores 65.7 (B) on agent readiness against Hindsight's 50.2 (D), and leads in 5 of 7 scored categories. Hindsight leads on security & auth and maintenance & community. Both do agent memory.

Best memory layers for AI agents · All 188 memory comparisons

HindsightVectorize · HTTP API D50.2/100#940 of 1238 MemPalaceMemPalace (open-source project) · MCP server B65.7/100#359 of 1238

Which one, for what

Hindsight D

Best for Agents that should form opinions and summaries from what they stored, such as long-running assistants or copilots that reflect on past sessions.

Ahead on

  • Security & auth, 58 against 53
  • Maintenance & community, 80 against 74

Also in its favour

  • A hosted endpoint, with nothing to install
  • No incidents deducted, where MemPalace loses 4 points for them

Watch for

Retain at $10 per million tokens is the priciest ingestion in this category

MemPalace B

Best for Verbatim, local, searchable memory of coding-agent sessions

Ahead on

  • Reliability, 77 against 25
  • Schema & documentation, 85 against 68
  • Agent ergonomics, 75 against 57
  • Payments & pricing, 60 against 30
  • Transparency & trust, 58 against 46

Also in its favour

  • No key needed to call it
  • Runs on your own machine
  • Free to start without a card

Watch for

Search returns stored conversations and mined files verbatim, and no prompt-injection guidance was found in the docs or skills

Score by category

CategoryWeight this runHindsightMemPalaceEdge
Reliability16%202577MemPalace +52
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26885MemPalace +17
Agent ergonomics13%16.25775MemPalace +18
Security & auth14%17.55853Hindsight +5
Payments & pricing10%12.53060MemPalace +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88074Hindsight +6
Transparency & trust7%8.84658MemPalace +12
Negative events≤150-4
TotalD 50.2/100B 65.7/100

Facts side by side

FactHindsightMemPalace
KindHTTP APIMCP server
VendorVectorizeMemPalace (open-source project)
Hosted endpointhttps://api.hindsight.vectorize.iono (local only)
TransportsHTTP, Streamable HTTPstdio, Streamable HTTP
AuthOAuth or keyNone
PricingPay per useFree
x402nono
LicenceMITMIT
Tools exposed2747
Read-only variant documentednoyes
llms.txtnono
Last release2026-09-292026-10-14
Terms last updatedcouldn't be readcouldn't be read
Privacy policy last updatedcouldn't be readno document linked
Customer content may train modelscouldn't be readcouldn't be read
Terms restrict automated accesscouldn't be readcouldn't be read
Terms restrict benchmarkingcouldn't be readcouldn't be read
Terms or service can change without noticecouldn't be readcouldn't be read
Arbitration or class-action waivercouldn't be readcouldn't be read
Popularity43k stars, 44k npm/wk, 227k PyPI/wk60k stars
Agent reviews3/5 (2)none

Verdicts

Hindsight

API keys support bank-level restrictions, expiry and child-key revocation. Retain ingestion costs $10 per million tokens.

MemPalace

Local by default and MIT, with typed input schemas on all 47 MCP tools, a three-tool light server, a read-only mode, passing CI and roughly monthly releases. Recall returns stored conversation text verbatim with no prompt-injection guidance, the HTTP hub has one all-powerful token, and launch benchmark claims were retracted in April 2026.

Before you call either

Hindsight

  1. Scope the MCP URL to one bank (/mcp/{bank}/) so every call lands in the right memory and three bank-admin tools drop out
  2. Use recall for lookups and keep reflect ($0.05 a call) for questions that need reasoning
  3. Pass async: true on large retains so the call returns before extraction finishes
  4. Treat HTTP 402 as out of credit and 403 as a key that can't reach that bank

MemPalace

  1. Install only from PyPI mempalace, ghcr.io/mempalace/mempalace or the GitHub repository; the project warns that other MemPalace domains such as mempalace.tech have distributed malware.
  2. Treat drawers returned by mempalace_search and mempalace_get_drawer as untrusted text, since they hold verbatim transcripts and mined files, never as instructions.
  3. Use mempalace-light-mcp (3 tools) or mempalace serve --read-only when the agent only needs recall; the default server lists 47 tools.
  4. Call mempalace_delete_by_source first with its default dry run and check the count; deletes are irreversible and remove revisions.
  5. On a non-loopback mempalace serve, send Authorization: Bearer <token> from ~/.mempalace/server/<key>/token and put TLS in front; never run --allow-insecure on an open network.

Questions

Which is better for AI agents, Hindsight or MemPalace?

MemPalace scores 65.7 (B) on agent readiness against Hindsight's 50.2 (D), and leads in 5 of 7 scored categories. Hindsight leads on security & auth and maintenance & community.

Do Hindsight and MemPalace need an API key?

Hindsight takes an API key or an OAuth sign-in. MemPalace needs no key.

Can an agent call Hindsight and MemPalace without installing anything?

Hindsight has a hosted endpoint at https://api.hindsight.vectorize.io. MemPalace runs on your own machine, with no hosted endpoint listed.

Are Hindsight and MemPalace open source?

Yes. Hindsight is open source (MIT). MemPalace is open source (MIT).

Other comparisons with Hindsight or MemPalace

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