Is Letta safe to use?

Letta has an HVTrust score of 61.8/100 (Grade C), ranked #299 of 1308 tracked AI agent projects. This score reflects verifiable supply-chain integrity, transparency, maintenance, and adoption signals.

What is the trust score for Letta?

Letta scores 61.8/100 on HVTracker's evidence-weighted HVTrust scale. It has 24.4k GitHub stars and is categorized under Memory & Knowledge.

Letta

letta-ai/letta

Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.

Memory & Knowledge Python Grade C Listed Apache-2.0

61.8/100

Rank #299 of 1308

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Promising trust profile, but some evidence still deserves review.

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Listing state

Listed

Evidence coverage

Grade A · 4/5 signals

Last push

2026-08-23 · 2d ago

Recent change

Rank +3

Is Letta safe? Letta scores 61.8/100 (Grade C), ranked #299 of 1308 tracked open-source AI agent projects, on evidence coverage A (4 of 5 independent signal types). The public evidence: no package-provenance attestation found; OSSF Scorecard rates its supply-chain practices 6.6/10; 3% of recent commits are signed; last pushed 2026-08-23. Every point is earned from checkable signals — never paid placement. How scoring works →

Ranked neighbours in Memory & Knowledge

#24 MemOS — 62.1 (C) → #25 Beads — 61.9 (C) → #27 memU — 61.2 (C) → #28 PrivateGPT — 59.8 (C) →

Quick Trust Read

What Would Improve It

Publish package provenance or release attestations for stronger supply-chain evidence.

Recent Changes

2026-08-24

Rank Moved

Rank rose 12 spots (#306 → #294)

2026-08-23

Rank Moved

Rank rose 12 spots (#318 → #306)

2026-08-22

Rank Moved

Rank rose 11 spots (#329 → #318)

Maintainer Checklist

Raise Scorecard signals Current OSSF Scorecard is 6.6/10. Tighten the weakest checks to improve public safety evidence.

Publish provenance Add package provenance or release attestations so users can verify where shipped artifacts came from.

Increase signed commits Raise the share of verified-signed commits to make maintainer identity and release history easier to trust.

Compare with another agent Get email alerts for Letta View Memory & Knowledge Report missing data

76.8

Activity sub-score · out of 100

#26

In Memory & Knowledge

How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption. Grade C reflects the trust score band: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Evidence coverage A is separate — it grades how many independent signal types back the score (4 of 5), so a high score on thin evidence stays visible. Full methodology →

Rank Trend

2026-08-11 2026-08-25

Activity & Reach

Stars

24.4k

Forks

2.6k

Last Push

2026-08-23

2 days ago

Commits (4 wk)

Downloads (7d)

26,840

pypi

HN mentions (30d)

Open Issues

Rank Change

▼5

was #294

Analysis

HVTrust Dimensions vs Memory & Knowledge

61.8 / 100 · 100.0% confidence

Letta Memory & Knowledge average (44 agents)

Safety / Integrity50% OSSF Scorecard · 30% provenance · 20% signed commits

8.4 / 25

1.6 below avg 10.0

Identity / Provenance60% listing status · 40% build provenance

10.8 / 18

1.3 below avg 12.1

Transparency50% declared license · 50% OSSF Scorecard

14.1 / 17

1.7 above avg 12.4

Maintenance60% last-push freshness · 40% commit activity

15.0 / 20

2.6 below avg 17.6

AdoptionLog-scaled stars · package downloads

16.4 / 20

2.8 above avg 13.6

Activity Inputs

76.8 / 100

StarsRepository reach

26.3 / 30

FreshnessLast push recency

24.7 / 25

ActivityRecent commits

9.7 / 25

CommunityFork signal

15.9 / 20

Supply Chain Trust

Package Provenance

None

No package attestations found

OSSF Scorecard

6.6 / 10

OpenSSF Scorecard · scanned Aug 25, 2026

Signed Commits

of last 100 commits verified

Binary-Artifacts 10

Branch-Protection 5

CI-Tests 8

CII-Best-Practices 0

Code-Review 8

Contributors 10

Dangerous-Workflow 10

Dependency-Update-Tool 0

Fuzzing 0

License 10

Maintained 9

Packaging -1

Pinned-Dependencies 0

SAST 0

Security-Policy 10

Signed-Releases -1

Token-Permissions 10

Vulnerabilities 10

Is Letta safe?

Letta has a mixed signal profile. Some trust indicators are present, others are missing. Whether it is safe for your use case depends on which gaps matter to you — review the breakdown below before adopting in production.

Does Letta publish package provenance?

No published build provenance is currently detected for Letta. This is common for open-source projects but means consumers cannot independently verify that the package on the registry matches the GitHub source.

Does Letta have an OpenSSF Scorecard?

Letta has an OpenSSF Scorecard score of 6.6/10. The Scorecard checks for branch protection, signed releases, dependency updates, fuzzing, code review, and other supply-chain hygiene items. See the full check breakdown on this page.

Is Letta actively maintained?

Actively maintained. The repository was pushed to within the last 2 day(s).

What license does Letta use?

Letta ships under Apache-2.0. A declared, OSI-approved license is one of the transparency signals HVTrust scores.

Are Letta's commits signed?

3% of the last 100 commits to Letta are verified-signed (GPG, SSH, S/MIME, or GitHub's signing flow). Signed commits help confirm that code was authored by who the commit claims.

Not a safety endorsement. HVTracker describes what public signals show, not whether a project is safe for your use case. Run your own security review before adopting in production.

AI agent surface

MCP, providers, tool surface

Scored in HVTrust

These runtime-trust fields — detected from public repo docs and manifests — contribute a bounded adjustment to this project's HVTrust score alongside supply-chain evidence. The exact values each field can add or subtract are documented in the methodology → Compare this surface across every listed agent in the capability matrix →

MCP Server Support

high confidence

Implemented

Letta appears to expose MCP server capabilities.

Detailed evidence is not shown in the public view.

External Service Dependencies

high confidence

10 detected

Public provider/service dependencies detected.

Credential signal: API keys or service config markers documented.

Tool / Plugin Surface

high confidence

Declared

Declared plugin/integration surface detected.

database
search

Detailed evidence is not shown in the public view.

Package Provenance Drift

low confidence

Unknown

Package source metadata is missing or inconclusive

Detailed evidence is not shown in the public view.

MCP signal live
External deps live
Tool / plugin surface live
Package provenance drift live

Maintain Letta?

For maintainers

HVTrust scores Letta from public signals only — we never contact maintainers first. If a signal is wrong, stale, or missing (provenance you publish, a Scorecard you run, signed releases), tell us and we'll review it. Corrections are public and tracked on GitHub.

Submit a correction → Add the trust badge

Reputation Timeline

Signal history

2026-08-24

Rank Moved

Rank rose 12 spots (#306 → #294)

2026-08-23

Rank Moved

Rank rose 12 spots (#318 → #306)

2026-08-22

Rank Moved

Rank rose 11 spots (#329 → #318)

2026-08-19

Rank Moved

Rank dropped 19 spots (#310 → #329)

2026-08-17

Rank Moved

Rank rose 81 spots (#394 → #313)

2026-08-17

HVTrust Changed

HVTrust up 3.7pts (56.8 → 60.5)

2026-08-14

Rank Moved

Rank rose 11 spots (#401 → #390)

2026-08-12

Rank Moved

Rank rose 11 spots (#409 → #398)

2026-08-10

Rank Moved

Rank dropped 18 spots (#390 → #408)

2026-08-08

Rank Moved

Rank dropped 96 spots (#292 → #388)

2026-07-15

Rank Moved

Rank dropped 12 spots (#250 → #262)

2026-07-14

Rank Moved

Rank dropped 14 spots (#236 → #250)

2026-07-13

Rank Moved

Rank dropped 30 spots (#206 → #236)

2026-07-03

Rank Moved

Rank rose 11 spots (#195 → #184)

2026-06-26

Rank Moved

Rank rose 25 spots (#215 → #190)

2026-06-26

HVTrust Changed

HVTrust up 4.9pts (53.9 → 58.8)

2026-06-26

Activity Score Changed

Activity score up 12pts (61 → 73)

2026-06-24

Rank Moved

Rank dropped 25 spots (#188 → #213)

2026-06-23

Rank Moved

Rank dropped 12 spots (#176 → #188)

2026-06-18

Rank Moved

Rank dropped 13 spots (#143 → #156)

2026-06-01

Rank Moved

Rank dropped 15 spots (#102 → #117)

2026-05-29

HVTrust Changed

HVTrust up 9.9pts (42.8 → 52.7)

GitHub → PyPI: letta

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For maintainers

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Other agents in Memory & Knowledge

Data sources
GitHub REST API (repo, commits, stars, forks, license) · PyPI / pypistats (downloads, provenance) · OpenSSF Scorecard CLI · Algolia HN Search API
Each agent's signals refresh once daily across 6 staggered batches. Methodology v4.3 · Raw JSON