Free GTM stack
The $0 outbound stack: 10 free GitHub repos for GTM engineering
You can replace a typical $5,000-a-month outbound stack with 10 free, open-source GitHub repos: Crawl4AI, browser-use and Scrapling to find accounts, Treg and changedetection.io for buying signals, webappanalyzer and ColdIQ GTM Skills to enrich, coldoutboundskills for cold email, and Twenty plus crm-blueprints for the CRM. Claude Code wires them into one system.
Get every repo and Claude Code skill from the video, plus the full system map, and the weekly GTM engineering newsletter.
By David Walker-Dobson, GTM engineer · Updated
- All 10 repos, with what each one replaces
- The Claude Code skills from the video
- The full system map: find, signal, enrich, send, capture
- Weekly GTM engineering breakdowns
The system
One system, five stages, 10 repos
Each repo fills one box. Point Claude Code at the repo, write one prompt, and it wires into the system. The value is in how the pieces connect and what lands in the CRM.
01Find
Replaces: Scraping services, list builders, VAs
- 1
Crawl4AI
Any website to clean markdown, for research and ICP scoring at scale.
- 2
browser-use
An agent with a real browser that clicks, scrolls and fills forms.
- 3
Scrapling
Builds lists nobody else has, like trade-show exhibitors, and copes with bot protection.
- 1
02Signal
Replaces: Signal and intent subscriptions
- 4
Treg
One key into thousands of data endpoints: hiring, funding, job changes. Pay per call.
- 5
changedetection.io
Watches pricing, careers and product pages and alerts you when they change.
- 4
03Enrich
Replaces: Technographic and enrichment tools
- 6
webappanalyzer
Open tech-stack fingerprints, so every account is segmented by what it runs.
- 7
ColdIQ GTM Skills
Sales triggers, email templates and list building as Claude Code skills.
- 6
04Send
Replaces: Copywriting and outbound hires
- 8
coldoutboundskills
Around 30 Claude Code skills built from more than a thousand real campaigns.
- 8
05Capture
Replaces: Per-seat CRM licences
- 9
Twenty
An open-source CRM you can self-host for the cost of hosting.
- 10
crm-blueprints
The repo I built: 15 CRM-agnostic blueprints that plan before they touch anything.
- 9
Still paid: domains, inboxes, hosting and a little data. The difference is you own every piece of the stack.
Questions people ask
Is the outbound stack really free?
The repos are free and open source. You still pay for sending domains and inboxes, hosting, some pay-per-call data, and your Claude or Codex subscription. The difference is that you own every piece of the stack instead of renting it every month.
Do I need to be a developer to run these repos?
No. Each repo is run through Claude Code: point it at the repo, write one prompt describing what you want, and it installs the tool and wires it into the rest of the system.
Can these repos replace Clay?
They cover the jobs many teams use Clay for: scraping and research, buying signals, enrichment and cold email copy. You trade a monthly subscription for setup time in Claude Code, and you keep full control of the workflow.
Which repo matters most?
The CRM layer. If the objects, fields and stages in your CRM are wrong, the other nine repos pour activity into a sieve: no attribution, no owner, and replies nobody sees. crm-blueprints exists to fix that.
Is it safe to scrape LinkedIn with these tools?
LinkedIn and many other sites ban scraping in their terms. Check the terms of any site before you point a scraper at it, and don't run these tools at a scale that puts your accounts at risk.
What does a GTM engineer do?
A GTM engineer builds the systems behind outbound and inbound growth: finding accounts, spotting buying signals, enriching data, sending outreach and capturing everything in the CRM. Most of the value is in the orchestration, meaning how the pieces connect and what data ends up where.
More free resources from the videos
Want a system like this built for you?
Tentt is a GTM engineering team. We build signal-driven outbound, CRM and RevOps systems into B2B companies' stacks.