Past: @DigitalOcean Co-Founder & CMO. Current: CEO & CoFounder @ Source (attribution software), Managing Partner @ Maximize (developer marketing agency)
Miami Beach, FL
Joined August 2008
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Congrats to @BarrettLyon & the doxx.net team on their official launch to provide private networks for agents and people. 🔥
Today we’re launching doxx.net, enabling Agentic Defined Networking for everyone. We raised $38M from @a16z, @AnimoVentures and Focal.vc.
Create private networks for you and your AI agents, without a server in the middle. 38M+ threats blocked since December.
Our first private-network call was a freedom call. Now it’s your turn.
Mitch Wainer retweeted
Source MCP is live.
Marketers can feed Claude, Cursor, Grok, and other agents multi-touch attribution from Source: the same Visit → Meeting → Deal path as the dashboard. Agents use that data to automate marketing workflows and drive more growth.
Use it to:
• Ship landing pages from paths that close deals
• Reshape ad campaigns from cost per conversion
• Build CRM follow-ups from Meetings and Deals that already convert
• Triage channels against your CAC target
• Queue blog topics and page rewrites from pages that book meetings
source.app/articles/source-m…
Huge congrats to one of our favorite clients, @blaxelAI (YC X25), on its acquisition by @baseten! An amazing outcome and an exciting opportunity for both companies to build the first agentic cloud.
Congrats to Paul, Nicolas, and the rest of the Blaxel team. Well deserved! 👏
Also - the new brand and website look 🔥 ;)
Congrats @ClementDelangue & the @huggingface team for their $13B acquisition to @nvidia! Reposting our convo from TechCrunch Disrupt back in 2017! What an incredible journey!
Startups, raising money, and how to choose the right co-founder - #ItsHatchening in this edition of Hatch Founders' Circle with @huggingface_ph, @AccernCorp & @MitchWainer youtu.be/ZFKLvF2Qw1Y
Proud of our client from @ycombinator for launching Struct, the AI production engineer that monitors every change you ship in prod and fixes it when it breaks. Humans optional. 🚀🔥
In 2026, code is written faster than we can physically read it.
25 PRs before lunch. Your whole app rewritten in Rust in 18 hours.
But reliability hasn't kept up. Monitors are an afterthought, alerts pile up ignored, and when prod breaks, your customers notice first.
That's why we're launching Struct: the AI Production Engineer.
It reads every PR you ship, creates monitors for each one, and fixes things when they break. (Humans optional.)
Keep moving at AI speed and never think about monitoring again.
Excited for the v2 beta launch of Source. We are getting a ton of great feedback from our users. Sign up for free to unlock your revenue potential.
Attribution is broken. So we rebuilt it.
One pixel across your GTM stack. Clicks, pages, meetings, deals. Including the ones that came from ChatGPT and Claude.
If you've sat in a meeting arguing about what actually drove the pipeline, this is what we built.
Source v2 is live. Demo video is below.
Sign up for free: source.app
Mitch Wainer retweeted
Attribution is broken. So we rebuilt it.
One pixel across your GTM stack. Clicks, pages, meetings, deals. Including the ones that came from ChatGPT and Claude.
If you've sat in a meeting arguing about what actually drove the pipeline, this is what we built.
Source v2 is live. Demo video is below.
Sign up for free: source.app
🤖 Made with AI
So proud of our client, Hexo Labs, as they announce their open source self improving AI called SIA. Superintelligence is becoming a closer reality to solve the worlds most challenging problems.
Superintelligence will be built on Self Improvement.
Today @hexoai, we’re excited to release ‘SIA’ - an open-source Self-Improving AI, to achieve any goal through recursive self improvement.
While trying to solve a problem, SIA doesn't just improve it's abilities by updating it's harness, it updates it's own weights as well.
We’re hiring two senior roles (remote) at Maximize as we continue to grow our work with developer-first startups across AI, infrastructure, data, and developer tools.
Open roles:
• Head of Brand Marketing
• Head of Lifecycle Marketing
At Maximize, we operate as embedded GTM partners for companies like Turso, Estuary, OpenHands, Appfarm, Blaxel, and others building highly technical products for engineers.
We’re looking for operators who love shipping real work, working directly with founders, and helping technical companies find clarity in their positioning, growth, onboarding, retention, and go-to-market strategy.
The Brand Marketing role is focused on positioning, messaging, narrative, brand systems, and website strategy.
The Lifecycle Marketing role is focused on PLG lifecycle strategy, onboarding, activation, retention, expansion, and growth infrastructure.
If you feel that you could be a great fit or have anyone that comes to mind, please feel free to DM or email me directly at [email protected].
Mitch Wainer retweeted
Introducing SubQ - a major breakthrough in LLM intelligence.
It is the first model built on a fully sub-quadratic sparse-attention architecture (SSA),
And the first frontier model with a 12 million token context window which is:
- 52x faster than FlashAttention at 1MM tokens
- Less than 5% the cost of Opus
Transformer-based LLMs waste compute by processing every possible relationship between words (standard attention).
Only a small fraction actually matter.
@subquadratic finds and focuses only on the ones that do.
That's nearly 1,000x less compute and a new way for LLMs to scale.
Mitch Wainer retweeted
Blaxel is officially a first-class sandbox provider in the new version of @OpenAI Agents SDK.
Your agents now have shell, file I/O, and live preview URLs, all running in isolated cloud sandboxes on Blaxel infra.
xitter.cf/OpenAIDevs/status/2044…
Bring your own environment.
The Agents SDK now supports sandbox execution with providers including @Cloudflare, @Vercel, @modal, @e2b, and more.
Keep files, credentials, and execution state in your environment while passing approved context to the model.
Mitch Wainer retweeted
So good to catch up with you @MitchWainer!!!!
On this week's episode of Growth Journal, I speak with Ashley Smith @ashl3ysm1th, Founder and Managing Partner of @vermilionfund, about what's really happening in venture and why AI is changing everything faster than anyone expected.
Episode 2 with Ashley Smith out now youtube.com/watch?v=NaXPuQQh…
On this week's episode of Growth Journal, I speak with Ashley Smith @ashl3ysm1th, Founder and Managing Partner of @vermilionfund, about what's really happening in venture and why AI is changing everything faster than anyone expected.
Episode 2 with Ashley Smith out now youtube.com/watch?v=NaXPuQQh…
The best ideas rarely come from staying in your bubble. Pull from B2C, make B2B more human, and remember marketing starts the moment a user touches the product.
Episode 2 with Bill Macaitis @SaaS_CMO_Pro out now youtube.com/watch?v=KKDQxVpV…
We should modernize go to market like we modernize product. Slack moved away from gated forms and lead scoring toward product led sales. Get people using the product first, then reach out based on real usage signals and PQLs.
Episode 2 with Bill Macaitis @SaaS_CMO_Pro out now youtube.com/watch?v=KKDQxVpV…
B2B doesn’t need to be stiff. Humor, video, and real emotion build trust. When people feel good about your brand, they stick around and they tell others.
Episode 2 with Bill Macaitis @SaaS_CMO_Pro out now youtube.com/watch?v=KKDQxVpV…
The biggest growth lever at Salesforce, Zendesk, and Slack was pricing and packaging. True freemium worked because users could actually use the product, and paid became the natural next step as teams scaled.
Episode 2 with Bill Macaitis @SaaS_CMO_Pro out now youtube.com/watch?v=KKDQxVpV…