[]SELECTIVE

CI COST
LOOK LIKE
A HOCKEY
STICK?

Agents love writing tests. You can't prune them all, and you can't afford to keep running every test on every build. Selective is the intelligence layer on top of your existing CI. It runs only the tests necessary to validate the current set of changes while also perfectly distributing tests between nodes, detecting flakes, retrying failures, and streaming results to coding agents in real time.

⏎ GET_ONBOARDED::⌥ HOW_IT_WORKS

Onboarding teams now · works with your existing CI

[ci spend][2021 → 2026]

10×1×coding agentsevery test, every changewith selective

202120222023202420252026

ci spend, every test on every changeci spend with selective

supported runners

✓RSpec· Rubyready

✓Minitest· Rubyready

·ExUnit· Elixircoming soon

RUN THE
TESTS THAT
MATTER.

Selective knows which tests to run. Make a three-line change to one file? Run only the tests that could fail when that code changes, saving on compute and shortening the feedback cycle. Our money-back guarantee ensures you'll save more money on your CI bill than you spend on Selective.

[run.4127 · identity.rb → main][SELECTING]

app/services/billing/identity.rb+ 3 − 0 modified

1 class IdentityResolver

2 def resolve(commit)

3 return by_id(commit.author_id) if commit.author_id

4 by_email(commit.author_email)

5 end

7 def by_email(email)

8+ return nil if email.blank?

9+ Member.find_by("LOWER(email) = ?", email.downcase)

10+ end

FILES · 9 of 1,240 shown

01services/billing/identity_spec.rbTOUCHED

02workers/commit_resolution_worker_spec.rbRelated

03requests/billing/portal_spec.rbRelated

04auth/session_spec.rbskipped

05admin/audit_log_spec.rbskipped

06models/invoice_spec.rbskipped

07lib/cache_spec.rbskipped

08requests/webhooks_spec.rbskipped

09models/pricing_spec.rbskipped

✓ 3 files selected · 1,237 skipped

OPTIMIZE
RUNTIME
WITH QUEUE
DISTRIBUTION

The selected tests are distributed to CI nodes from a central queue. This results in an optimized total runtime where each node completes at the same time. Traditional test-splitting strategies predetermine the split up front based on historical timing, which often leaves one or two nodes holding up the build on your slowest test files.

[without selective · split by file][WALL: 1:30]

node-01

node-02

node-03

node-04

node-05

0s30s60s1:30

node-04 held the build · 4 nodes idle ~50% of run

[with selective · one queue][WALL: 0:50 ✓]

node-01

node-02

node-03

node-04

node-05

0s30s60s0:50

All five nodes finished together · suite done at 0:50

DECLARE WAR
ON FLAKES.

When a test fails, Selective immediately retries it on another node. If it passes the second time, it's recorded as a flake. From there it can be quarantined automatically so it doesn't fail the build, and it's indexed so you know when and where it happens. You can even see which tests ran before it, helping you or your agents reproduce the sequence-dependent ones.

[flake_dashboard · last 12 runs · main][2 FLAKES]

testruns · oldest → newestratetrend

identity_spec#resolve_when_email············0%——

webhook_spec GET /hooks/github··F··F··F·F·33%↑ 4×◆ FLAKE

invoice_spec#per_committer············0%——

import_worker_spec#imports_batches·····F·····F17%↑ 2×◆ FLAKE

session_spec#refresh_token············0%——

GIVE YOUR
AGENT
SUPERPOWERS

With Selective's CLI, your agent can monitor test results in real time, enabling it to react before the suite is finished. For example, if a failure occurs, the agent can decide whether the build should continue or stop early. Or, when a new flake is discovered, it can begin an investigation right away.

[$ selective tail][STREAMING]

00:01✓identity_spec#resolve_when_github_id

00:01✓commit_resolution_worker_spec#perform

00:02⚠webhook_spec GET /hooks/github· flake

00:03✓portal_spec GET /billing/portal

00:03✓invoice_spec#per_committer

00:04✓team_spec#invite_member

00:05✓pricing_spec#proration

00:05✗billing_dashboard_spec#current_committer_count· failed on retry

00:06✓session_spec#refresh_token

00:06✓plan_spec#upgrade_path

00:07✓audit_log_spec#redact

00:08✓membership_spec#per_committer

[12 of 12 settled]

STOP WAITING
FOR CI.

We're adding teams to Selective a few at a time so we can give each one our attention. We'll help you get it running in your CI and stay close while your team settles in. When something gets in your way, you're talking to the people who can fix it.

made by Ben & Nate