Agents need memory they can trust.
Heartwood Memory gives AI agents provenance-first recall, policy-enforced retrieval, and deletion that leaves a key-destruction receipt — embedded beside your existing systems of record. Not a new database. Not “unlimited memory.” The control plane in between.
python -m pip install "heartwood-memory[recall,mcp]" · source-available core · your data stays put
from heartwood import Heartwood
hw = Heartwood(path="./heartwood.db", tenant="tenant:acme")
hw.remember(
"Refunds over $500 require finance approval.",
subject="policy:refunds",
created_by="agent:support",
)
# recall under policy — signed, provenance-carrying, tenant-scoped
hits = hw.recall("what's our refund policy?",
principal_id="agent:support")Proven by gates you can re-run.
Product-path enterprise retrieval over 56 queries (nDCG@10 0.818).
Every recalled memory carries its source chain, model version, and signature.
Zero cross-tenant policy leakage under adversarial probes in the single-trust-domain trust suite.
Retrieval, policy, faithfulness, deletion, egress, and resilience gates.
The pre-registered Phase 1 gate, measured warm with the store, index, embedder, and reranker hot in one process. On our hosted gateway, real production p95 measured 795ms across 873 recalls over a 7-day window in July 2026. We publish the benchmark because it is the budget we design hook- and agent-loop integrations against — not a service level we commit to.
Policy-before-ranking vs. 0.000 leakage when filtering after the vector search.
Every figure above states how it was measured. Gate results come from executable gates in the Heartwood core with pre-registered thresholds and paired-bootstrap confidence intervals; figures marked as benchmarks are controlled measurements and are not production service levels.
Five guarantees other memory layers leave to the prompt.
Memory is typed
Source, episodic, semantic, procedural, profile, and generated memory are distinct kinds — so agents retrieve the right context on purpose instead of treating every chunk the same.
Policy comes before ranking
Tenant, classification, scope, denied subjects, and effective time filter the candidate set before results are ranked. The agent never sees a record it is not cleared for, then relies on a prompt to behave.
Provenance by construction
Every memory is signed at write and re-verified at read. Each recall result carries its source chain, the model version that produced it, and a valid signature.
Generated memory is not canonical
LLM-written summaries stay derived artifacts. They must carry source support and pass faithfulness checks before they become useful, trusted memory.
Deletion that leaves a proof
Crypto-shred erasure follows source-to-memory lineage into projections, indexes, caches, and exports — and leaves a tamper-evident audit record behind.
For agents where being wrong is expensive.
Built for teams running high-stakes agents over support tickets, customer records, operational Postgres, internal policy and knowledge bases, and compliance-sensitive workflows — teams that already have agents but need stronger answers for provenance, policy, deletion, and auditability.
Regulated support agents
Answer from policy and customer evidence, cite where every claim came from, and get a key-destruction receipt — key destroyed, derived artifacts purged — when a customer is deleted.
Operations & workflow assistants
Carry workflow memory and audit trails across long-running tasks without leaking one tenant’s state into another.
Research & synthesis agents
Produce source-grounded summaries that are gated on faithfulness before they are trusted as memory.
Compliance-sensitive copilots
Keep restricted material behind classification clearance; on governed generation paths, egress is evaluated before the external-model call — by policy, not by prompt.
The control plane between your agents and your systems of record — not a replacement for your database, and not “unlimited memory.”
Review, provision, build.
Review
Read the docs and the executable proof. Run the trust suite yourself — every governance claim is a gate you can re-run.
Provision
Pick a tier and provision a license, or start free and self-host. Keys are issued to your email; your data never leaves your environment.
Build
Install the library, point it at your data, and ship agents that retrieve under policy, cite their sources, and emit a key-destruction receipt on deletion.
Source-available core. Pay when you need governance backed by a team.
Community
Engineering teams proving the fit.
Free to read, run, and self-host for non-production use at any size. Organizations that qualify as a Small Organization under the licence — fewer than 100 employees and contractors, and under $1,000,000 in total revenue in the prior tax year — may also run it in production at no charge. See the LICENSE for the controlling definition.
- Embedded library (Python) + MCP server
- Provenance, typed memory, policy-gated recall
- Crypto-shred deletion + tamper-evident audit
- Run the governance test suite yourself
- Community support
Team
Organizations taking governed memory from a laptop into production.
Team is sold through a short conversation — we scope the deployment before it starts.
- Everything in Community
- Production recall gateway, hosted by us — serve recall to your app, authenticated and remote (or self-host it from the source-available core)
- Supported production deployment configuration
- Commercial-use license for production
- Email support (no SLA)
On the roadmap
Not shipped — not part of this subscription.
- Signed release distribution — signed wheels and manifest
Professional
Organizations governing agent memory under compliance pressure.
Professional is available now. Annual subscription, billed once per year, renews automatically until cancelled.
- Everything in Team
- Dedicated isolated tenant — your own instance, volume, and hostname; per-credential principal binding enforced server-side
- Per-answer evidence — every recall returns a hash-chained audit row and an explain_recall rationale you can re-run
- Priority support with a one-business-day response target (defined in Terms of Service §15.E.4) and security advisories
On the roadmap
Not shipped — not part of this subscription.
- Managed key custody with external KMS/HSM
- Signed audit export — auditor-verifiable trail
- SSO — SAML / OIDC for the control plane
- TypeScript SDK
Enterprise
Regulated organizations with auditors in the room.
Enterprise is scoped by conversation and billed by custom quote.
- Everything in Professional
- Self-hosted and air-gapped deployment, scoped with you
- Custom framework adapters and audit consulting
On the roadmap
Not shipped — not part of this subscription.
- Bring-your-own-HSM / customer-managed keys
- WORM audit retention + SIEM streaming
Professional is billed annually through Edukas Solutions and renews automatically until cancelled. Team and Enterprise are scoped by conversation. Roadmap items are listed separately and are not included in today’s subscription. Prices are per organization, in USD. Subscriptions are currently offered to organizations in the United States only.
Point it at your hardest agent.
We’re onboarding a small group of design partners shipping high-stakes agents who need real answers for provenance, policy, deletion, and audit. Bring a use case; leave with a plan.