Vertical stack
AI Coach & Prompt Consultant Tech Stack
The tool stack for independent AI consultants and prompt engineers — a young vertical, with most content still being written by people who don't actually do the work. Here's the real stack.
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TL;DR — the stack at a glance
| Category | Day-1 pick | Budget alternative |
|---|---|---|
| Workspace + wiki | Notion | Obsidian (local-first) |
| Email list | ConvertKit | Beehiiv |
| Scheduling | Calendly | Cal.com |
| Model subscriptions | Claude Pro + ChatGPT Plus | Just one of the two |
| Payments | Stripe | Stripe Checkout (hosted) |
| Password manager | 1Password Business | Bitwarden |
| API-key management | 1Password + op CLI | Doppler |
| Analytics | Plausible | GA4 |
| Course hosting | Kajabi or Teachable | Gumroad |
| Newsletter companion | Substack (optional) | — |
Total day-1 cost: ~$120–180/mo at list price.
Who this stack is for
You’re a solo operator whose work is “help organizations actually get value from AI.” That might mean:
- Prompt engineering workshops for companies adopting Claude or ChatGPT at scale.
- One-on-one coaching of executives learning to work with AI.
- Building custom AI workflows / agents for client-specific use cases.
- Running a paid newsletter or course about applied AI.
You bill $200–750/hr, or you run courses at $500–3,000 per seat, or both. Your moat isn’t the models — it’s your methodology, your case studies, and your community.
If you’re an AI researcher or ML engineer at a company, this isn’t your stack. Your stack is your engineering org’s stack.
The essential stack (Day 1)
Workspace + wiki: Notion
Your prompt library, client notes, workshop outlines, case studies, and personal knowledge base all live in one place. The reasons are the same as for any knowledge-worker vertical — see our Notion review — but with extra emphasis: prompts are re-usable IP. Version them, tag them by use case, and reference them during client work.
Some AI consultants prefer Obsidian for local-first privacy. Valid choice. You lose shared workspaces but gain complete data control.
Email list: ConvertKit
Your list is your business. You will get 80% of your leads from the newsletter you publish. ConvertKit is the right default — see our review — but Beehiiv is a reasonable alternative if you want paid-subscription infrastructure built in from day one.
Scheduling: Calendly
Discovery calls, workshop intake, coaching sessions — all flow through Calendly. Standard tier ($12/mo) unlocks the multi-event-type setup you need (intro call, paid call, workshop scoping, team session).
Model subscriptions: Claude Pro + ChatGPT Plus
Don’t try to consult on AI from the free tiers. Your clients will ask about capabilities you’ll only discover on the paid plans. Budget $40/mo for both as a baseline cost of doing business. At the API level, you’ll also need accounts — but those are pay-as-you-go, not subscriptions.
For clients using Claude at scale: have a paid Claude Team or Enterprise account so you can test multi-user workflows.
Payments: Stripe
Checkout for courses, invoicing for consulting, subscriptions for community/cohort access — all via Stripe. If you’re hosting courses on Kajabi or Teachable, their Stripe connection handles most of it.
Password manager + API-key management: 1Password Business
Every client’s API key. Every model-provider login. Every platform credential. Put it all in 1Password — see the full review. Pair with the op CLI for injecting API keys into local dev environments without ever writing them to .env files. This is a security posture you can legitimately advertise to clients.
Analytics: Plausible
Self-hosted is overkill for a solo practice, but Plausible Cloud is $9/mo, GDPR-friendly, and the reporting format is actually useful (not just vanity metrics). GA4 is free, but the learning curve + data privacy story is worse for a solo practitioner.
Add these at 500+ newsletter subscribers / first paid course
- Kajabi or Teachable — when you launch your first course.
- Loom ($15/mo) — workshop replays, async client feedback.
- Fathom — recorded calls with searchable transcripts, great for pulling case-study quotes.
- Circle or Discord — if you launch a paid community. Start with free Discord, upgrade only if you actually get traction.
Skip these (but everyone recommends them)
- LangChain / LlamaIndex courses that assume you’re building product — you’re consulting, not building SaaS. Know the concepts; don’t buy the full curriculum.
- Expensive prompt-management SaaS — your Notion prompt library is enough until you have a team.
- AI-specific CRMs — there are startups selling “CRM for AI consultants.” Notion is still enough.
- Vector database subscriptions you’re not actively using — pay-per-use is fine until you have a production workload.
Total monthly cost
| Line item | Solo day-1 | At $20k MRR |
|---|---|---|
| Notion Plus | $10 | $10 |
| ConvertKit Creator | $25 (at 1k subs) | $79 (at 5k subs) |
| Calendly Standard | $12 | $12 |
| Claude Pro | $20 | $20 |
| ChatGPT Plus | $20 | $20 |
| Stripe | pay-per-use | pay-per-use |
| 1Password Business | $20 | $20 |
| Plausible | $9 | $19 |
| Kajabi Basic | — | $149 |
| Google Workspace Business | $14 | $14 |
| Total | ~$130/mo | ~$343/mo |
Stack variations
Budget-conscious ($50/mo total)
Notion Free + Beehiiv Free + Calendly Free + ChatGPT Plus only + Stripe + Bitwarden + GA4 + Substack. Works for month 1–3 while you find product-market fit for your offer.
Premium (building a scaled practice)
Add Kajabi Growth ($199), Circle Business ($399), Fathom Team, a dedicated marketing ops tool (Customer.io $100), and real CRM (HubSpot Pro $90). You’re building a small media business at this point.
The three things I’d get wrong if I started over
- Picking the platform before the audience. AI consultants launch on Substack, Beehiiv, ConvertKit, and their own site — in that order of decreasing frequency. All four can work. What matters is publishing weekly for 12+ months, not which button you press.
- Over-investing in a custom-built agent framework. Your clients hire you for judgment, not for engineering. Keep your demos simple.
- Ignoring deliverability from day one. Your sending reputation matters as much as your content. Warm up your domain, use DKIM/SPF/DMARC, and avoid sending hard-pitch emails on week one.
FAQ
Do I need a course platform on day 1?
No. Your first cohort should be a Stripe payment link, a Google Doc curriculum, and a Zoom calendar. Upgrade to Kajabi or Teachable when you’ve run the thing twice and know what’s worth productizing.
Should I use GPT-4, Claude, or both?
Both, paid. You can’t consult on what you haven’t used. Claude is stronger for long-context reasoning and code; GPT-4 is stronger for some multimodal tasks and has better plugin / GPT Store integrations. Your clients use both.
What about Google Gemini and the others?
Worth a free trial every quarter. For most client workflows you’ll come back to Claude or GPT.
How do I handle API-key security for clients?
Never take a client’s API key. Have them create a scoped service account or use their own key through a shared workflow (e.g., their n8n/Zapier instance). If you must hold a key temporarily, put it in 1Password with an expiration note and delete it when the engagement ends.
The stack
