🧠 AI-powered engineering knowledge

GitHub tells you what changed.
WhyLog tells you why.

WhyLog passively captures engineering decisions from your PRs, Slack threads, and tickets. One click to approve. Ask anything about your codebase.

Trusted by teams at
◈ ACME CORP
⬢ GLOBALTECH
✦ NIMBUS
❖ VECTOR
⌘ KINETIC
⚡
Fully automatic
Watches your PRs silently. No behavior change needed.
✅
One click approve
Review AI drafts in Slack. Approve in 2 seconds.
🔍
Ask anything
"Why do we use Redis?" Get instant answers with sources.
How it works

Zero setup. Fully automatic.

WhyLog works silently in the background — no workflow changes, no prompts to fill out.

01
🔍

PR is detected

WhyLog silently watches your repositories. The moment a PR is merged, our AI springs into action.

Passively monitors GitHub & GitLab.
02
🧠

AI drafts the why

WhyLog analyzes the diff, comments, and tickets to write a structured engineering decision record.

Infers context from your entire history.
03
✅

Approve in Slack

Review the draft in Slack. One click to approve, edit, or reject. Decisions become instantly searchable.

Average team review: 8 seconds.
Live preview

Your decisions. Searchable.
Always in context.

Every architectural decision, trade-off, and "why" your team has ever made — searchable and queryable in seconds.

whylog.app/dashboard
WhyLog
⚡ Decisions
🔍 Search
👥 Team
⚙️ Settings
142
Total
118
Approved
24
Pending
7
Repos
Recent Decisions
Switch from REST to GraphQL for search endpoint
api-gatewayapprovedMar 20
Use Redis for session caching instead of DB
auth-serviceapprovedMar 19
Migrate CI from Jenkins to GitHub Actions
devopspendingMar 18
Deprecate legacy PHP endpoints by Q2
backendapprovedMar 17
Pricing

Recommended Plans

Generous enough for a solo dev or small OSS project to get real value and become a fan.

Monthly
Annually2 MONTHS FREE
Starter
$0/ month

Forever free. No credit card.

  • ✓100 decisions / month
  • ✓3 connected repos
  • ✓Unlimited team members
  • ✓GitHub webhook
  • ✓Slack approvals
  • ✓Ask Why search
  • ✓90-day decision history
Most Popular
Team
$29/ month

Less than 15 min of one engineer's time.

  • ✓1,000 decisions / month
  • ✓Unlimited repos
  • ✓Unlimited team members
  • ✓GitHub webhook
  • ✓Slack approvals + multi-channel routing
  • ✓Ask Why search
  • ✓Full decision history
  • ✓PDF export
  • ✓Priority email support
  • ✓GitLab webhook (soon)
  • ✓Linear integration (soon)
Growth
$79/ month

For teams shipping hard, every day.

  • ✓5,000 decisions / month
  • ✓Everything in Team
  • ✓Per-repo Slack channel routing
  • ✓Bulk PDF export
  • ✓Decision analytics dashboard
  • ✓Custom decision retention policy
  • ✓Dedicated support channel
  • ✓Notion sync (soon)
  • ✓Jira integration (soon)
  • ✓VS Code extension (soon)

Start capturing decisions today.

Free forever for 1 repo. No credit card. No sales call.