One buy across the sites developers read and the tools they build with.

Incremental developer reach beyond the platforms you already buy: native, labeled ads on independent sites, newsletters and in AI chats and coding agents, with every placement named and frequency managed for you.

Trusted by

The developer brands already advertising with our publishers

The network

Reach that adds up

50M+ad impressions a month
Millionsof developers reached each month
4surfaces in one campaign: sites, newsletters, AI chat, coding agents
Placements

Your ad, where developers already are

Every placement is a named site or tool, shown natively and labeled. Include or exclude any of them. AI chat and coding-agent placements are in early access.

kernelnotes.dev/maya/preview-databases
Search posts/Write
services:
  postgres:
    image: postgres:17
Maya Chen6 min read
Follow

Preview databases for every pull request

#postgres#devops#ci

We gave every preview deploy its own Postgres. Here's the GitHub Actions setup, the seed scripts, and what it costs per month.

21438Save
Dev communities

A native card beside the article

On the pages where developers research tools.

AskbaseAskbase 4
How do I give each preview deploy its own database?

Create a database branch for each preview environment, seed it from a snapshot, and drop it when the pull request closes:

# .github/workflows/preview.yml
on: pull_request
jobs:
  db:
    steps:
      - run: ./scripts/branch-db.sh $PR
Why this ad?
Halyard: instant Postgres branches

Spin up a database per pull request in seconds.

halyard.dev
Learn more
Ask a follow-up…
AI chat

Below the answer, never inside it

Labeled and separate from what the model says.

v2.4Search⌘K
Guides / Branching

Branching

Create an isolated copy of your schema for each environment.

npmpnpmyarn
npx ql branch create pr-482

Branches inherit roles and extensions from the parent.

On this page Create a branchSeed dataClean up
Halyard

A Postgres branch for every pull request.

Docs sites

Next to the docs they keep open

3 of 48

#212: Postgres 18, branching and pgvector tips

Devfeed Weeklyto me · 8:02 AM
DEVFEED WEEKLYIssue 212
Brought to you byHalyardhalyard.dev

Branch your Postgres like you branch code. A full database for every pull request, gone when it merges.

Try it free →

Postgres 18 is out. Async I/O, virtual columns and faster upgrades…

Newsletters

In the issue they open every week

~/api — agent — zsh
› add a test database to CI
● Read .github/workflows/ci.yml
● Edit ci.yml +4 −1
+ services:
+ postgres:
+ image: postgres:17
- run: npm test -- --runInBand
● Run npm test
  48 passed · 1m 12s
✓ Done. CI starts a fresh Postgres on every run.
Sponsored Halyard: a Postgres branch per pull request halyard.dev/agent
›
Coding agents

One line after the task

Reporting

Every impression, traced to a named placement

No black box. Your report lists every site and tool that showed your ad, with what it delivered.

0.47% CTR
Halyard · launch campaign
Branch your Postgres like you branch code

A database copy for every pull request.

Placements8 named
Matched clicks5,035
Clicks filtered out1,904
Spend$36,382.68
PlacementSurfaceImpressionsCTRSpend (USD)
Kernel NotesDeveloper site512,8800.47%$13,330.00
AI chats, via partnersAI chat301,4420.34%$9,040.40
Devfeed WeeklyNewsletter188,1200.36%$5,630.10
Coding agents, via partnersCoding agent94,3100.48%$4,248.00
Queryline DocsDocs61,9040.29%$1,857.12
Infra DiariesCommunity40,2880.41%$1,208.64
Byte SizedNewsletter22,7100.33%$681.30
Rust CornerCommunity12,9040.38%$387.12
Audience

Experienced builders who use AI every day

From DEV's developer census, one of the publishers in the network. Described in aggregate: we never build profiles of individual readers.

6–10years coding, the median
1 in 3has coded for more than 20 years
83%work across two or more areas
78%use two or more AI tools

AI coding assistants

How often readers use one
77%use one most days or more

Source: DEV Community Developer Census. DEV members only; each publisher's own audience comes with your plan.

Formats

One creative in. Native everywhere.

Send a headline, a line of copy and an image. We render it in the native style of every site and tool, and preview each one before launch.

HeadlineBranch your Postgres like you branch code
DescriptionA database copy for every pull request.
ButtonTry Halyard free
80 / 100 / 24 characters
Site card
Below an AI answer
…then tear the branch down when the PR closes.
Agent line
61 tests passed
Halyard: branch your Postgres like you branch code.
Newsletter slot
FromDevfeed Weekly
Targeting

Tune every campaign to your audience

Choose topics, surfaces, publishers, countries and devices, then set how often and how evenly your ad runs. Change any of it while the campaign is live.

Topics and stackWhat the page or task is about.
SurfacesWhere developers read and build.
PublishersInclude or exclude any one by name.
CountriesRun where your product sells.
DevicesReach people at their desk or on the go.
Frequency and pacingHow often your ad shows, spread across the month.
How it runs

From brief to live campaign

1Start

Share your goal

Audience, countries, budget and dates.

AudienceBackend, Postgres
CountriesUS, DE
Budget$10,000
StartNext Monday
2Next

Get a plan

Placements, reach and price in writing.

Campaign plan · Halyard
Dev communities62%
AI chat24%
Docs sites14%
3Before launch

Approve the previews

See your ad on every surface first.

Previews4 of 4 approved
4Live

Track and adjust

A live dashboard by placement.

Clicks today+12%
Performance

Tools that make every dollar count

Built into every campaign from day one, on every placement in the network.

CTR by headline A/B, 14 days
Winner: "Branch like code"Other headlines
Creative testing

Find the headline developers click

  • Rotate several headlines in one campaign
  • See CTR by headline and by surface
  • Swap creative any time without relaunching
Creative review Before launch
Headline matches landing pagePass
Developer-tool advertiserPass
No sensitive topicsPass
Agent line under 60 charactersEdit
Brand safety

Reviewed before anyone sees it

  • Every ad checked against publisher and partner rules
  • No gambling, adult, weapons, political, crypto or misleading ads
  • Exclude any placement, including daily.dev's
Matched clicks Last 30 days
Raw clicks1,000
After duplicates860
After bot filter740
Counted640
Click matching

Count only clicks we can prove

  • Every reported click matches a served impression
  • Duplicates, link scanners and bots removed first
  • The filtered count is in every report
How's the Halyard campaign doing this week?
distribution.reports.placements(week)
PlacementClicksCTR
Kernel Notes1,2040.47%
AI chats3880.31%
API and MCP

Manage campaigns from your own tools

  • Scheduled reports through the Reporting API
  • Ask your AI assistant how a campaign is doing
  • Pause, resume and add creatives over MCP
Budget pacing Day 15 of 30
$6,120 of $12,000 spentOn pace
Pacing

Spend evenly, never over budget

  • Daily pacing across every placement
  • Hard stop at your budget
  • Pause or move budget any time
Signups by placement Last 30 days
PlacementSignupsPer signup
Kernel Notes142$18
AI chats61$24
Coding agents38$21
Conversions

Count signups, with consent built in

  • Our conversion pixel on your site, no third-party cookies
  • Each signup credited to the click that brought it
  • Cost per signup in every report
Compare

What you get that other channels don't give you

distribution.devDeveloper display networksProgrammatic display
Developer sites, newsletters and AI placements in one buy
Every placement named in your report
Every reported click matched to a served impression
Targeting by content, not personal profiles
Manage campaigns from your AI assistant
YesSome providersNo

Based on each provider's public website. Compare with each alternative

Get a plan with placements, reach and price in writing.

Brands that already advertise with our publishers