Products

Semantic Overlays

AI-native

An NX bit for language models

semantic-overlays.vercel.app SourceAI Models & Agents / Prompts, Evals & LLM Observability

AI Benchmark
Desktop
Mobile
Monthly visits
<5K
Sep 2026
Public revenue
Undisclosed
No public revenue evidence yet
Entry price
Free
No monthly subscription pricing
Creators
joshua_s_penman
GitHub @joshuasp
Launched
2mo ago
2026-09-01 · Est.

Traffic

Last 12 months
Monthly visitsData through Sep 2026
Events1 marketing move

Marketing moves

Launches, search & content, referrals, promotions

  • Launched on Show HN (6 pts)Launch

    Semantic Overlays – an NX bit for LLM prompt injection (live demo) — I've built a new method for steering LLMs called Semantic Overlays, small trained adapters on a frozen model which change how it perceives…

    Sep 1 · 2mo agoLaunch page

    At the time: <5K visits/moVisits: next 1 mo +256%

Third-party reviews & case dossiers

Acquisition breakdowns, engineer reviews & open-source metrics
Show HN
2026-09-01Source
Post excerpt:
I've built a new method for steering LLMs called Semantic Overlays, small trained adapters on a frozen model which change how it perceives a piece of its context. The most readily applicable usage is to mitigate prompt injection, and it lets us take a very-injectable Qwen-3.5-9B to SOTA scores on all the prompt injection benchmarks I could find. (They are on

Open Source & Self-Hosting

GitHub · MCP / Skill
JoshuaSP/semantic-overlays
Last commit 2026-10-02
GitHub Stars
Public repo
Forks
—
License
See repository
Primary language
—
Browse peer open-source projects →

Traffic sources

Sep 2026

Traffic breakdown

Channels

  • Direct47%
  • Organic Search28%
  • Referrals9%
  • Social6%
  • Other11%

Countries

  • United States100%

Search

Domain authority 93Domain registered 2020-01-28

No search keyword data for this website yet.

Traffic data: Vaneform

Pricing

Pricing page not identified yet, or no public pricing listed.

Pages & changes

Tracked since 2026-09-01

Key pages

Weekly snapshots

Changes

No pricing, plan, or positioning changes detected since tracking started.

Questions & evidence

How much website traffic does Semantic Overlays get?
Vaneform estimates <5K website visits in 2026-09. Visits can include repeat visits; this estimate does not measure paying customers or revenue.Source

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