Founder notes
Short, unedited posts from the founders as we build OXYGEN: what works in GTM engineering, agentic outbound, and running a company where agents write the code. Originally published on LinkedIn, archived here in full. For longer essays, read the blog.
GTM Engineering
The GTM engineering discipline: economics, agencies, playbooks, community, and how the best teams run go-to-market in 2026.
- The GTM tools map — US vs European GTM techEurope has exactly 1 GTM unicorn. The US has 6. We pinned 63 GTM tools to the city where they're actually built (map below). Europe builds 31 of them. The US…
- The next GTM moat is in-personI sell GTM software. The best GTM move right now has nothing to do with software. If you've been thinking about where the moat in GTM goes in 2026 and 2027,…
- GTM creators to follow · LinkedIn graphicIf you want to be ahead in AI GTM in 2026, these are the 20 accounts to follow. I recently read "Steal Like an Artist" by Austin Kleon. One idea stuck: Nothing…
- Old way vs new way of GTMI've talked to 20+ of the best GTM engineering agencies in the world, plus a bunch of new YC startup sales teams. The way the best teams run GTM in 2026 looks…
- Clay Club x Claude Code night · Swiss GTM community recapClaude code might be able to automate of your GTM, but it definitely can't replace community events:) This week the Swiss GTM community got together for a Clay…
- Top 5 Claude Code use cases the top 1% GTM agencies built (moving off Clay)I've talked to several top 1% GTM Engineering agencies. Here are the top 5 Claude Code use cases they've built. Even Clay enterprise partners are moving away.…
- Targeting YC Startups and the best GTM Engineering AgenciesThis mistake wasted us 1.5 months in our SaaS. Here's what nobody told us about launching GTM. You've heard the question: "Who is your ICP?" But really. Who…
- GTM Engineering Cheat Sheet · how the industry is changingI talked to several Top 1% GTM Engineers. Here are the 5 traits they all share. I'm talking about people sending several million emails per month for clients.…
Agentic GTM
Running GTM with AI agents from Claude Code and MCP: Clay alternatives, AI SDR takes, workflows, and the agentic GTM stack.
- Loops are the next big thing in GTMI built a loop today that roasts my own LinkedIn posts before they go out. first run it caught me about to ship AI slop AND a claim that wasn't even true 🫠…
- Our biggest competitor does $41.5 billion a yearOur biggest competitor does $41.5 billion a year. Six months ago I'd have called building an AI CRM to take on Salesforce, HubSpot, and Attio the dumbest idea…
- All these AI SDRs who raised $17M will failAll these AI SDRs who raised $17M will fail. I say this as someone who previously built a LinkedIn AI SDR myself. AI SDR was never a new category. It's a new…
- Forward Deployed GTM Engineer offer · outcome-based pricing launchAll these AI SDRs who raised $17M will fail. I say this as someone who built a LinkedIn AI SDR myself, so I'm not throwing stones from the outside. AI SDR was…
- Opus 4.8 × OxygenClaude Opus 4.8 is out. Here is why it's big for GTM. GTM is tool-calling work. Pull a list, enrich it, check the CRM, update a field, send the sequence, read…
- Workflows launch · host your GTM workflows directly in Oxygen (no n8n, no Railway)We just shipped the AI native clay x n8n for GTM. The top 1% of GTM engineers are already building their entire sales OS in Claude Code. But they all hit the…
- Clay for Agents · waterfall enrichment in Claude CodeWe have built Clay, but for Agents instead of GTM Engineers. A real Clay-style waterfall enrichment. Inside Claude Code. Called by an agent, not a human.…
- Claude Code vs Oxygen (announcing the MCP server)Every other sales call I take opens with the same question. "How is Oxygen different from Claude Code?" They're not competitors. Use both. We just shipped the…
Cold Email & Outbound Infrastructure
Cold email engines, campaign launches, sequencers, and outbound infrastructure guides straight from operating them.
- Cheapest hyper-personalised outbound infra (guide + stack)Claude Sonnet 5 is out. So I'm open-sourcing the most cost-effective cold email system I could build. 100k hyper-personalised emails a month. Under $1k in…
- The Cold Outbound Manifesto (lead magnet)Last month, our whole GTM system booked 57 sales calls. I consolidated every guide I've ever written into one free manifesto. Outbound and content, the full…
- How we launch 28 cold email campaigns in a single dayHere's how we launch 28 cold email campaigns in a single day. That's how you actually create a self-improving AI Email engine. I was pretty overwhelmed, with…
- Native Sequencer LaunchOur customers asked for it. We deliver. OXYGEN now has a native multichannel sequencer. LinkedIn rolls out today. Email is coming in the next weeks. Until now…
- Fan mail from a cold prospect · cold email reply screenshotWe got fan mail from a cold prospect. "You seem a little bit sharper than the rest at using AI for marketing." That's his reply to a cold email OXYGEN wrote…
- Cold email engine from Claude Code (100k/month)You can now launch 100k+ emails / month from claude code and get +3% reply rates. I open-sourced our Cold Email OS. I've been doing cold email outbound for 3…
- Blueprint launch · Stop paying agencies $5k/month for cold outboundStop paying agencies $5k/month for cold outbound. Let Claude Code book you 49 sales calls/month. Damn that sounded cringe, but I guess that's what you gotta…
- Open-sourcing the Oxygen outbound playbook · GTM vault dropThis week we booked 13 sales calls with Claude Code. I open-sourced our 15 skills, 20 GTM integrations, and the Notion template that runs it. (Cal screenshot…
Signals & Inbound-Led Outbound
Intent signals, post-engager plays, and inbound-led outbound that replaces bought lists.
- Inbound-led outbound (scraping post engagers on Oxygen)I haven't bought a list in months. Here's what we do instead. Every day at noon, an OXYGEN recipe runs. It pulls every person who engaged with our LinkedIn…
- Georgi Signalbase PodcastGeorgi delivers the best signals to teams like HubSpot, Salesforge and CompanyEnrich. I had him on the podcast for 40 minutes. Here are the 5 lessons I took…
- 75% of customers from this one play · signal-based outbound on post engagers+75% of our customers come from this one outbound play. If you are in B2B, this 1 intent signal outperforms everything else. Why would you desperately do cold…
- 4 signal-based outbound lessons from GeorgiGeorgi from Signalbase cold-DMed me in March based on a signal. I'm now a paying customer. Last week he hopped on a webinar to teach the signal based outbound…
Founder-Led Content Engine
The LinkedIn content system behind 200k+ monthly impressions: rituals, funnels, publishing, and results.
- LinkedIn system guide — launch (comment SYSTEM)We booked +120 demo calls for our SaaS in the past 90 days on LinkedIn. I sat down for 6h and open-sourced our whole setup. It takes me one Sunday afternoon to…
- Attention is the new oil and gas (the go-to-market OS)What do Elon Musk and Alex Hormozi have in common? They own attention. And attention is the new oil and gas. Whoever owns it wins. A couple years ago, every…
- Founders building in public · founders-to-follow (LinkedIn graphic)The best SaaS companies in 2026 grow through a founder-led approach. Here are the top 21 founders building in public to learn from: Adam Robinson - public…
- The LinkedIn system · 330 signups in 90 days · replicate in 24h (FINAL)We grew our SaaS to 330+ signups in 3 months. All from posting 5x/week Here's how you can replicate our system in 24h. So in the last 90 days I got: → 669,000…
- 10k LinkedIn followers reintroductionJust crossed 10k followers. Let me reintroduce myself. Hey:) I'm Tim, 22, in between sf and Switzerland, building my GTM SaaS. I used to be a Swiss karate…
- Every Sunday I bulk-create a full week of contentEvery Sunday I sit down for ~5 hours and bulk-create a full week of content. Last 30 days that I got 189k impressions, 57 booked calls and 129 new OXYGEN…
- Content System in Claude CodeEvery Sunday I sit down for ~5 hours and bulk-create a full week of content. Last 30 days that turned into 189,865 LinkedIn impressions (+342%), 57 booked…
- Content Engine Lead MagnetIt takes me a sunday afternoon / week to generate +200k impressions and 50 booked demo calls / month. I open-sourced our anti-AI-slop content system powered by…
- Our GTM funnel · 200 signups + 50 calls last month · 6 pillars100+ new signups and 50+ sales calls booked in May. Here's how we're trying to double it in June. Our GTM motion at OXYGEN has 6 pillars running in parallel…
- 102k impressions · 31 calls · 68 signups · the 3-layer Claude Code content engineLast month: 102k LinkedIn impressions. 31 booked calls. 68 new signups. I know it sounds cringe, but our content engine is ACTUALLY Claude Code powered. Before…
Building an AI-Native Company
Build-in-public notes on running a startup where agents write the code: milestones, SF, lessons, culture.
- Our working culture at OXYGEN (ignition energy + purpose)We're not going to make it if we don't work 7 days a week, 10+ hours a day. That's just the culture at OXYGEN right now. Harry Stebbings gets backlash for…
- 74 subagents, 6.5M tokens, one Claude Code session40 minutes. 6.5 million tokens. 74 subagents. That's what one customer feature cost us yesterday, one we'd scoped for 2 weeks. Instead of dropping it into the…
- How SF SaaS companies actually launchI've been in SF for a few weeks. The biggest difference between how SaaS companies launch here vs. in Europe: they launch the same product fifty times. In…
- Week 2 in SF - how AI startups grow hereWeek 2 in SF. Here's how AI startups are actually growing here. Week 1 I got distracted. Hit a bunch of events. Most were noise. Great builders, but mostly…
- What Europeans can learn from SFWhat Europeans can learn from SF. 4 days here. Already 7 events. Codex meetups. Stripe's Startup Build Days at the AWS HQ. GTM events with Exa. I have good…
- Zurich to San FranciscoZurich🇨🇭 → San Francisco🇺🇸 I dreamt of going to the valley for 4 years. Many don't know this about me, but I was born in the US and then raised in…
- Founding Oxygen GTM Inc. in the US (45-min Stripe Atlas)It's official🎉. We officially founded OXYGEN GTM Inc. in the US. It took us 45 minutes via Stripe Atlas, 2 days of processing, done. Here's why we chose the…
- We shipped 335k+ lines of code and closed $4.5k in 3 weeksWe shipped 335k+ lines of code and closed $4.5k in 3 weeks. Here is how we are building an AI native company. Most customers flat out don't believe a 2-person…
- AI Native Company2 people. 250k+ lines of code. 3 weeks. Most customers (and a couple of investors) flat out don't believe a 2-person team shipped OXYGEN this fast. I'm not…
- Roasting our own onboarding · Context + Integrations rebuildWe got 190+ signups. 90% of them were majorly confused. So we just shipped a new onboarding. Roast it. (link in the comments) The honest truth: our goal isn't…
- Location matters · 2 weeks coworking with Philipp in MunichAs a startup, we have a 90% chance of failure. The location you pick can make or break your odds. I took a flixbus to Munich to build with Philipp in one of…
- Agentic coding update · AI slop is real, the self-improvement loop, and our cleanup agent99.9% of our codebase is written by Codex and Claude Code. We spend $1.2k in tokens / month. Before the job-fearing devs spam the comments with objections,…
- 100 users twice · why the milestone doesn't actually matterI've hit +100 users in my SaaS twice in a matter of weeks. Here's the 5-step launch framework I always use. Users aren't the right metric to measure. The real…
- Ignore the 20 agent demos · they're all deadWe spent 3 weeks building the wrong product. Ignore all 20 agent demos you'll see on LinkedIn and X today. They're all dead. Here's why: → The big labs have…
- The $25k Prospera AI post-mortemI lost over $25k on my last startup, Prospera AI. Here are the 5 bitter lessons I learned. Honestly, I was kind of ashamed to talk about it for a while. But…
- Build the factory, not the car · AI maxing lessons$1.2k / month on AI coding tools. Here's what our AI maxing dev workflow actually looks like. Philip and I are building Oxygen, an AI CRO agent. Last month we…
Context Engineering & the GTM Second Brain
The company second brain: LLM wiki, skills vault, and context engineering for GTM work.
- Outbound Second Brain (lead magnet with the Skills)Launching a new outbound campaign used to take me 3 hours. Now it's 4-5 prompts and 30-45min. The difference isn't a better prompt. It's a second brain my…
- Context Engineering and the Second BrainThe second brain post did 389 reactions and about 50 DMs. The most common question: "How do you stop the AI from forgetting everything?" That's the real…
- Second Brain video breakdown (50 DMs sequel)I got like 50 DMs asking for our second brain GTM setup. So I recorded a full breakdown. It's the video on this post. It's the exact repo our agents use to run…
- Company-Wide Second Brain (5 steps)We built a company-wide second brain for our content and outbound. Here are the 5 steps to build your own. First, why this even matters. Everyone is racing to…
- Oxygen Skills Vault (GitHub + Notion lead magnet)We just open-sourced our entire content stack. 10 Claude Code skills + a Notion template. Same setup behind every post you see from OXYGEN. This one too.…
Oxygen Ships
Launches, relaunches, and product films from the Oxygen team.
- Oxygen relaunchToday we're relaunching Oxygen. The past 6 weeks have been very intense. We crossed 330 users, got a lot of feedback from customers and agency partners, and…
- Publishing LaunchWe just shipped native publishing in OXYGEN. You can now schedule one post across LinkedIn, X, Instagram and TikTok. And OXYGEN drops your first comment…
- Oxygen launch film · Just Ask (60s)[PHONE, to camera] Claude Code. Get me 100 more users and demo calls for my SaaS. Make no mistakes [CLAUDE CODE — AI voice, calm, one line] On it boss.…
- Oxygen product update · 30-day roundup · LinkedIn carouselThe past month we shipped like maniacs. Here are all the things that are new with Oxygen. The hardest part of moving this fast is keeping you in the loop. We…
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