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The AI Marketing Stack I Actually Use

Not a sponsored list. These are the tools I open every day, what they do, and why the free alternatives suck.

April 1, 2026· Andres Fonseca

Let me be real with you. Every “best AI tools for marketers” list you’ve read was written by someone who tested those tools for 20 minutes and grabbed an affiliate link. This isn’t that.

I run marketing for multiple projects simultaneously. I’ve tried probably 60 AI tools in the last two years. Some are on my invoices every month. Most got canceled within a week. Here’s what survived.

The Core: Claude for Everything That Requires a Brain

I know it sounds like I’m supposed to say “I use all the tools equally!” but no. Claude is my primary brain. Not ChatGPT, not Gemini. Claude.

Here’s why it matters for marketing specifically: Claude understands nuance. When I say “write this email like someone who’s skeptical of the product but came around after seeing the results,” it actually does that. ChatGPT gives you corporate-speak. Claude gives you texture.

I use it for:

  • Strategy docs and messaging frameworks
  • Campaign briefs
  • Writing first drafts that don’t need massive editing
  • Breaking down competitor positioning

The free tier is genuinely not enough if you’re doing real work. The API is where the magic is, especially once you start building workflows.

The Workflow Layer: N8N

This is where most marketers stop before they should. N8N is an open-source automation tool, and I use it to connect everything. Think of it like Zapier but without the per-task pricing that will make you cry when you’re running at scale.

My N8N handles:

  • Pulling leads from web forms into my CRM
  • Triggering Claude API calls to score and qualify leads
  • Routing content drafts to the right approval queue
  • Publishing social posts after they clear review

The learning curve is real. You need to be comfortable with JSON and at least a little logic. But once it clicks, you build things that would cost $50k at an agency. I’ve built lead qualification systems in a weekend that run themselves.

If you want the managed version without the self-hosting headache, N8N Cloud exists. I started there, then moved to self-hosting when my workflow count got embarrassing.

Content: Fathom Plus Claude Equals Unstoppable

Here’s one nobody talks about enough. Fathom records and transcribes my sales calls, customer interviews, strategy meetings - everything. The AI summary it produces is good, not great.

But here’s my actual workflow: I take the Fathom transcript, drop it into Claude, and say “extract every piece of customer language about their pain points, their goals, and what almost made them not buy.”

The output is gold. Real words from real customers. I use those verbatims in ads, email subjects, landing page copy. It tests better than anything a copywriter invents from scratch because it’s literally what customers say.

Fathom costs $15/month. It’s the best $15 in my stack.

SEO Intelligence: Ahrefs

Look, I know people love the free tools. Semrush has a free tier, Ubersuggest exists, Google Search Console is free. And they’re all fine for occasionally checking something.

But if SEO is a real channel for you, Ahrefs is the tool. The keyword difficulty scores are more accurate. The content gap analysis actually surfaces things you’d miss. The backlink database is the most comprehensive I’ve used.

I pair it with Claude to speed up the interpretation layer. I pull the keyword data and competitive content gaps from Ahrefs, then use Claude to draft a content brief that maps to what’s actually ranking. That combo turns a 3-hour research process into 45 minutes.

Email: Instantly for Outreach, Klaviyo for Everything Else

I split these intentionally. They’re solving different problems.

Instantly is for outbound cold email. It manages inbox rotation, warm-up, sequence logic. It’s built specifically so your emails don’t go to spam. The AI features for personalization have gotten good enough that I use them as a first pass, then tweak.

Klaviyo is for anyone who already knows me. My list, my customers, people who downloaded something. The flow builder is intuitive, the segmentation is powerful, and the AI subject line testing has actually improved my open rates without me doing anything.

Trying to use one tool for both jobs doesn’t work. They’re optimized for completely different deliverability scenarios.

Analytics: Posthog

Google Analytics is free and I’ve used it for years. But the moment I needed to understand user behavior inside a product or app, GA4 just didn’t cut it.

Postihog does session recording, funnel analysis, feature flags, and A/B testing. The AI query feature lets me ask questions in plain English and get a chart back. “Show me the conversion rate for users who saw the new landing page vs the old one in the last 30 days” - done.

The free tier is genuinely generous. I didn’t pay for it for six months.

The Bench: What I Keep Around but Don’t Rely On

  • Perplexity: for quick market research and news monitoring. Good for getting oriented on a topic fast.
  • Descript: for anything involving video. If I’m repurposing a talk or podcast into clips, Descript makes the editing not terrible.
  • Notion AI: my whole knowledge base is in Notion anyway, so the AI features are convenient. Not world-class, but frictionless.

What I Cut and Why

Jasper: expensive and the output quality isn’t better than Claude. It just has more templates. Copy.ai: same problem. Surfer SEO: the content editor is useful in theory, but I found myself writing around its suggestions rather than for the reader. Any AI social media scheduler that “writes posts for you”: they all produce the same beige LinkedIn content. Hard pass.

The Real Lesson

The best stack isn’t the most tools. It’s the right tools that talk to each other. My whole system is basically Claude for thinking, N8N for automation, and four or five data sources feeding into both.

If you’re just starting: get Claude Pro, get Fathom, and spend a weekend learning N8N basics. That’s 90% of what you need to move faster than 90% of marketing teams.

The rest is details.

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