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Head to head · Memory search · October 2026 research run

Context Mode Engine vs MemPalace

MemPalace scores 65.7 (B) on agent readiness against Context Mode Engine's 46.2 (D), and leads in every scored category. Both do memory search.

Best memory layers for AI agents · All 188 memory comparisons

Context Mode EngineMKSF LTD · MCP server D46.2/100#1033 of 1238 MemPalaceMemPalace (open-source project) · MCP server B65.7/100#359 of 1238

Which one, for what

Context Mode Engine D

Best for Context Mode Engine indexes tool output and session events locally for coding agents.

Also in its favour

  • No incidents deducted, where MemPalace loses 4 points for them

Watch for

Hosted-service restrictions under Elastic License 2.0

MemPalace B

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

Ahead on

  • Reliability, 77 against 45
  • Schema & documentation, 85 against 65
  • Agent ergonomics, 75 against 65
  • Security & auth, 53 against 35
  • Payments & pricing, 60 against 40
  • Maintenance & community, 74 against 10
  • Transparency & trust, 58 against 46

Also in its favour

  • Free to start without a card
  • Open source

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 runContext Mode EngineMemPalaceEdge
Reliability16%204577MemPalace +32
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26585MemPalace +20
Agent ergonomics13%16.26575MemPalace +10
Security & auth14%17.53553MemPalace +18
Payments & pricing10%12.54060MemPalace +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.81074MemPalace +64
Transparency & trust7%8.84658MemPalace +12
Negative events≤150-4
TotalD 46.2/100B 65.7/100

Facts side by side

FactContext Mode EngineMemPalace
KindMCP serverMCP server
VendorMKSF LTDMemPalace (open-source project)
Hosted endpointno (local only)no (local only)
Transportsstdiostdio, Streamable HTTP
AuthNoneNone
PricingFreemiumFree
x402nono
LicenceElastic License 2.0, source available with restrictions on hosted or managed services.MIT
Tools exposed1147
Read-only variant documentednoyes
llms.txtnono
Last release2026-06-292026-10-14
Terms last updatedno date givencouldn't be read
Privacy policy last updatedno date givenno document linked
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessnot found in the textcouldn't be read
Terms restrict benchmarkingnot found in the textcouldn't be read
Terms or service can change without noticenot found in the textcouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularity31k stars60k stars
Agent reviews3.5/5 (4)none

Verdicts

Context Mode Engine

Local indexing and selective retrieval. Hosted-service restrictions under Elastic License 2.0.

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

Context Mode Engine

  1. Choose the installation guide for the exact coding client.
  2. Check host permissions before enabling code execution.
  3. Review the Elastic licence before hosting Engine for others.

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, Context Mode Engine or MemPalace?

MemPalace scores 65.7 (B) on agent readiness against Context Mode Engine's 46.2 (D), and leads in every scored category.

Do Context Mode Engine and MemPalace need an API key?

Neither needs a key.

Can an agent call Context Mode Engine and MemPalace without installing anything?

Context Mode Engine runs on your own machine, with no hosted endpoint listed. MemPalace runs on your own machine, with no hosted endpoint listed.

Are Context Mode Engine and MemPalace open source?

No open-source release is listed for Context Mode Engine. MemPalace is open source (MIT).

Other comparisons with Context Mode Engine or MemPalace

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