The engineering teammate that never forgets
Stop losing knowledge when engineers leave. Engineer9 captures your team's tribal knowledge, playbooks, and context — automatically.
Trusted by engineering teams at
Knowledge compounds faster than teams can preserve it
Critical context scatters across conversations, people, and tools — creating inefficiencies that compound as you scale.
Context loss during transitions
Architectural decisions and system knowledge leave when engineers do.
Fragmented information
Critical details scatter across Slack, docs, and PRs.
Answering "why" repeatedly
Teams lose hours explaining past decisions to new members.
Onboarding bottlenecks
Senior engineers spend hours answering recurring questions.
HOW IT WORKS
Start preserving knowledge in 3 minutes
No complex setup, no training required. Install, connect, and start asking questions.
01
Connect your Slack workspace
Install engineer9 to your Slack workspace in under 3 minutes. No complex configuration — just authorize and go.
02
Engineer9 builds your knowledge graph
It learns your team structure, system ownership, past decisions, and incident resolutions from your existing conversations.
03
Ask questions, get sourced answers
@ mention engineer9 anywhere in Slack. It searches memory, cites sources, and gives answers with full context.
EXPERIENCE
Works exactly like talking to a teammate
@engineer9 why did we move from MongoDB to PostgreSQL last year?
The migration was decided in #architecture on March 12, 2024. Here's the context:
Decision: PostgreSQL migration
Reason: MongoDB's flexible schema was causing data integrity issues at scale. The team needed ACID transactions for billing and user data.
Decision makers: Priya (Eng lead), Alex (CTO), with input from the data team.
Tradeoff noted: Higher operational complexity accepted in exchange for data consistency guarantees.
Source: #architecture thread · playbooks/postgres-migration.md
@engineer9 who owns the auth service now?
PRODUCT
Built for how engineering teams actually work
Engineer9 integrates into your existing workflow without disruption. No new tools to learn, no processes to change.
Institutional memory
Captures decisions, discussions, and context from Slack automatically. Nothing is lost when engineers leave.
Ownership mapping
Knows who owns what across your entire stack. Ask who's responsible for any service, feature, or system.
Decision archaeology
Surface the reasoning behind technical choices made months or years ago, with full context and sources.
Code context (Q2 2026)
Connect to GitHub to understand PR history, code ownership, and why specific implementation choices were made.
Enterprise security
SOC 2 Type II compliant. Data encrypted at rest and in transit. We never train on your team's data.
Always learning
Every conversation makes engineer9 smarter about your team. Knowledge compounds over time automatically.
WHY ENGINEER9
Not just another search tool
You already have Slack search, Notion AI, and maybe Glean. Here's why teams choose engineer9.
Built for engineering teams
Not a generic AI assistant. Engineer9 understands services, ownership, incidents, and the way engineers actually communicate.
Lives where you work
No new app to open. Engineer9 works inside Slack — where your team already spends its day.
Proactive, not reactive
It surfaces relevant context before you ask. Onboards new engineers, writes playbooks after incidents, and schedules recurring summaries.
Privacy-first architecture
Your data stays yours. We never train models on your team's conversations or use your knowledge to improve the product for others.
USE CASES
Measurable impact across your org
Architecture Decisions
Preserve the reasoning behind every choice
Engineer9 captures why technical decisions were made, what alternatives were considered, and what tradeoffs matter. New engineers understand the "why" without archaeology through Slack.
10+ hrs
Saved per week*
80%
Less context switching*
Example interaction
You
@engineer9 why did we choose PostgreSQL over MongoDB?
engineer9
That was decided in #architecture on March 12, 2024. The team needed ACID transactions for billing — MongoDB's flexible schema was causing data integrity issues at scale. Priya and Alex led the decision. I have the full tradeoff analysis in the playbook.
Onboarding
Onboard engineers in days, not weeks
New hires get instant access to institutional knowledge. Engineer9 answers questions about architecture, ownership, and processes — reducing onboarding from weeks to days.
60%
Faster onboarding*
90%
Engineer satisfaction*
Example interaction
You
@engineer9 who owns the authentication service?
engineer9
The auth service is owned by Priya's team (Platform). Primary contact is Priya for architecture decisions, Raj for day-to-day ops. The runbook is in playbooks/auth-service.md and the on-call rotation is in PagerDuty.
Knowledge Retention
Never lose critical context
Team turnover doesn't mean lost knowledge. Engineer9 captures every decision, discussion, and lesson learned — building an institutional memory that outlasts any individual.
100%
Context retention
Zero
Knowledge loss*
Example interaction
You
@engineer9 what was the outcome of the API versioning discussion?
engineer9
The team decided on URL versioning (/v1/, /v2/) in the March 2024 RFC. Header-based versioning was rejected due to caching complexity. The decision thread is in #api-design and the RFC is linked from the API docs.
* Based on early results from pilot teams (6–12 weeks, 3–5 teams, 20–50 engineers)
FROM PILOT TEAMS
“Our new engineers used to spend their first two weeks asking the same questions everyone asks. Now they @mention engineer9 and get answers with context immediately. Onboarding went from 3 weeks to under 2.”
Sarah Chen
VP Engineering, TechCorp
“We have great docs but nobody searches them. Engineer9 finds the answer in Slack history from 6 months ago and links to the doc. It's like having a senior engineer who remembers everything.”
Mike Johnson
Engineering Manager, DataFlow
Testimonials from 8-week pilot program participants
FAQ
Common questions
PRICING
Simple, transparent pricing
Start free, scale as you grow. All plans include a 14-day trial of Professional features.
Starter
For small teams getting started
- Up to 50 team members
- 3 months conversation history
- Core knowledge capture
- Linear integration
- Slack integration
Professional
For growing teams that need more
- Unlimited team members
- Unlimited history
- GitHub integration
- Custom playbook templates
- Advanced memory search
- Priority support
- Admin dashboard
- SSO
Enterprise
For large teams with specific needs
- Everything in Professional
- Custom LLM deployment
- On-premises option
- Multi-workspace
- SLA guarantee
- Dedicated support
- Custom integrations
- Security review
Ready to eliminate knowledge silos?
Join engineering teams preserving institutional knowledge with engineer9. Start free, no credit card required.
Free up to 50 team members · No credit card · 2 minute setup