Sources and method

Official sources only

Official company engineering blogs only (company sites and their official Medium/Substack channels); no aggregators or news sites.

A blog is listed only when it is on the company's own domain or a subdomain of it (engineering.fb.com, eng.lyft.com), or when it is a channel the company's own site links to: a Medium publication, Substack, dev.to or Hashnode blog, or another domain the company runs (netflixtechblog.com, medium.com/pinterest-engineering). News sites, aggregators, newsletters, analyst firms, event organisers and personal blogs are never listed; a media company only counts for its own engineering blog. Every blog is checked against this rule before it is listed, and blogs that fail it are kept off the lists with the reason recorded.

Coverage

• Companies in the companies.fru.dev registry checked for an official blog on their own site: 627 of 2,788 (22%). Six more are checked every day, new registry companies first, engineering pages first (/engineering, engineering.company.com, /blog), then the Medium or Substack channel the company's site links to; one with no feed is checked again after 90 days.
• Not covered yet: blogs with no RSS or Atom feed and no listing page the site can read, and companies outside the registry.

Feeds, read daily

Every day at 8:22 UTC the site requests each blog's own RSS or Atom feed, once, and adds the posts it has not seen. Two blogs publish no feed (Anthropic Engineering and Anthropic Research); for those it reads the listing page and keeps only entries that show a title, a link and a printed date. No model reads anything and nothing is guessed: a post without a date in its feed is skipped.

What is kept

The title, the date, the link and at most 240 characters of the summary the blog itself publishes in its feed. Never the post, never its images. Every row links to the original on the company's site.

Topics

Fixed keyword rules over the title (counted three times), the feed's own categories (twice) and the summary. The best score is the post's topic; close runners-up become tags. A post nothing matches is filed under product and company news.

Cadence and status

Cadence is posts a month over the last six months, or over the days the feed covers when it holds less history than that (a feed that only lists its latest ten posts). Active: posted in the last 60 days. Quiet: last post 60 to 180 days ago. Dormant: nothing for 180 days or more.

History

Nothing is overwritten quietly. When a blog's feed or address changes, a feed breaks or recovers, a blog's status or cadence band changes, or a post is retitled, a row is added to the change log. Posts that drop out of a feed stay. Each Tuesday a snapshot of every blog's numbers is kept.

The blogs and their feeds

Checked and left out

Uber Engineering and LinkedIn Engineering (no feed, and no listing page with dates the site can read), DoorDash Engineering (refuses automated readers), Google Developers Blog (its feed carries no dates), and Cohere, Pinecone, Modal and CockroachDB (no feed found). News sites, newsletters, analyst firms, event organisers and content-marketing publications the daily check found on registry company sites are kept off the list. Suggest a blog with Suggest a missing blog.

Across Glyph

Company names and slugs follow the shared registry at companies.fru.dev; blog pages link to the company's profile and to the same company on the other Glyph sites.

Disclaimer

Official company engineering blogs only (company sites and their official Medium/Substack channels); no aggregators or news sites. Posts from each blog's own public feed, read every day: titles, dates and short excerpts only, and every post links to the original at its company. The list grows as new official blogs are found. Logos via logo.dev; trademarks belong to their owners. Anonymous usage stats via Google Analytics. Use Suggest a correction on any page.