methodology · verified 2026-08-11

Public-data parity, without pretending public data is premium data.

This ledger compares data capabilities, not source count, language coverage, latency, proprietary models, or licensed archives. A covered capability must map to a live High Signal source or an implemented product workflow. Partial and unavailable rows stay visible until the underlying access genuinely changes.

publication methodology →live source directory →

Material gaps we do not rename as parity

7 attributable references

Capability ledger

Covered source mappings are regression-tested against the generated source catalog.

The Daily Diff

official reference ↗
covered
Hacker News, GitHub, and research-paper discovery

High Signal applies its own evidence gate and does not copy story volume or delay rules.

sources · hackernews · github · semantic-scholar

Octolens

official reference ↗
covered
Developer, community, video, podcast, newsletter, and news monitoring

Coverage is batch intelligence, not a real-time mention-delivery SLA.

sources · reddit · github · hackernews · youtube · bluesky · stackexchange · dev-ecosystems · podcast-index · substack · producthunt · news

partial
X, LinkedIn, TikTok, and Medium monitoring

No dependable first-party X, LinkedIn, TikTok, or Medium firehose is claimed.

sources · news · bluesky

Peekaboo

official reference ↗
covered
Multi-model answer and citation-source tracking

Provider coverage depends on configured credentials; Google AI Mode remains partial.

product capability · Mentions/OpenLens visibility matrix, cited URL index, and provider fan-out

Subreddit Signals

official reference ↗
covered
Reddit posts/comments, buyer intent, pain points, competitor context, and reply drafting

Managed service, conversion attribution, and real-time delivery claims are not compared.

sources · reddit

AlphaSense

official reference ↗
covered
Company filings, press releases, news, regulatory, and macro sources

Coverage is public and curated rather than an enterprise searchable document universe.

sources · edgar · sec-xbrl · ir · hkex · news · gov · global-macro

unavailable
Broker research, expert calls, and licensed private-company data

High Signal does not license these premium or proprietary datasets.

Quartr

official reference ↗
covered
First-party filings, reports, and investor-relations updates

High Signal links public documents and does not claim Quartr-scale global company coverage.

sources · edgar · sec-xbrl · ir · hkex

unavailable
Live earnings audio, real-time transcripts, backlog transcripts, and slides

No equivalent licensed real-time global earnings media dataset is present.

RavenPack

official reference ↗
covered
News/social observations, entity mapping, and relationship graphs

No parity claim is made for proprietary models, source volume, languages, or latency.

sources · news · gdelt · reddit · hackernews · github · techmeme