A hundred dollars a month. That's the budget. Here's the best stack you can build with it.
This isn't theoretical. These are tools I've used and recommended to real clients. The goal: cover the most important AI functions without waste.
The Constraint That Makes You Sharp
Most businesses I talk to are either spending nothing on AI tools (leaving massive capability on the table) or spending wildly without measuring ROI.
$100/month is a good forcing function. It's enough to run a real AI practice. It's not enough to buy everything that looks shiny. You have to choose based on what actually moves your business.
The Stack
1. Claude Pro — $20/month
The foundation. Use this for:
- Writing emails, proposals, content drafts
- Reasoning through complex business decisions
- Summarizing long documents
- Building prompt libraries and templates
- Anything where output quality and nuance matter
Why Claude over ChatGPT? For pure writing and reasoning, Claude edges it. You can swap in ChatGPT Plus if you prefer — same price, similar quality. Some businesses run both, but within our $100 budget, pick one.
Running total: $20/month
2. Make (formerly Integromat) — $9/month (Core plan)
This is your automation backbone. Make connects your apps and builds workflows that run automatically.
What you'll use it for:
- Sending lead notifications to your phone or Slack when someone fills out a form
- Moving new leads into your CRM automatically
- Triggering follow-up email sequences after specific actions
- Pulling data from one system and pushing it to another
Why Make over Zapier? Zapier's entry plans are pricier for comparable functionality. Make's $9/month Core plan covers most small business automation needs. Zapier's Starter starts at $20/month for limited tasks.
Running total: $29/month
3. Google Workspace — $6/month (Business Starter per user)
If you're not on Google Workspace already, fix that. Gmail, Drive, Docs, Calendar, Meet — all integrated. AI features (Gemini) are being added to the suite.
More practically: Google Workspace integrates cleanly with Make, your CRM, and most business tools. Running your business on a free Gmail account looks unprofessional and creates integration headaches.
Running total: $35/month
4. GoHighLevel — $97/month (OR a lighter CRM/email combo)
Here's where the budget gets tight. GoHighLevel at $97 would push us over $100 with the other tools.
Two paths:
Option A: GoHighLevel at $97/month (swap something else out) This is "all in one" — CRM, email marketing, SMS automation, appointment booking, landing pages, review management, and AI features. If you need all of these, GoHighLevel is extraordinary value.
To fit under $100: drop Claude Pro (use the free Claude tier) and use Make's free tier for simple workflows. The GHL platform handles a lot of automation natively.
Option B: Stay under $100 with lighter tools
- HubSpot Free CRM (genuinely free, surprisingly capable)
- Mailchimp or Brevo for email marketing ($10-$20/month)
- Calendly ($10/month) for appointment booking
This gets you CRM + email + scheduling for $20-$30/month, keeping the full budget intact.
My recommendation: If you're a service business that sells via consultations, GoHighLevel is worth the budget trade-off. If you primarily sell via e-commerce or don't need heavy CRM functions, go Option B.
Running total (Option B): $55-$65/month
5. Otter.ai or Fireflies.ai — $10-$17/month
Meeting transcription and AI summaries. Every meeting gets auto-transcribed. Ask it questions about what was discussed. Pull action items automatically.
If you're in meetings more than 5 hours a week, this pays for itself immediately in follow-up time saved and action items that don't get missed.
Otter.ai Pro is $10/month. Fireflies.ai Pro is $10/month. Both are good.
Running total: $65-$75/month
6. Tidio or Crisp — $19-$25/month (or free tier)
AI chat for your website. Handles basic visitor questions automatically. Captures lead information. Routes complex questions to you.
Tidio's Starter plan is $19/month and includes basic AI chatbot features. Crisp has a free tier that handles live chat without AI, upgrading to $25/month for AI features.
This is where a lot of lead capture magic happens — visitors who would have left your site without contacting you get engaged, answer a few questions, and submit their info.
Final running total: $84-$100/month
The Stack Summary
| Tool | Monthly Cost | Primary Function |
|---|---|---|
| Claude Pro | $20 | AI writing and reasoning |
| Make Core | $9 | Workflow automation |
| Google Workspace | $6/user | Productivity suite |
| HubSpot CRM | Free | CRM and contacts |
| Mailchimp/Brevo | $10-$20 | Email marketing |
| Calendly | $10 | Appointment booking |
| Otter.ai | $10 | Meeting transcription |
| Website chat | $0-$19 | Lead capture |
| Total | $65-$94 |
What This Stack Does for Your Business
With this setup, a small service business can:
- Draft proposals, emails, and content in a fraction of the time
- Capture leads from the website automatically, 24/7
- Never drop a follow-up (automated sequences)
- Book consultations without phone tag
- Have transcribed, searchable records of every meeting
- Run email campaigns to prospects and clients
All for under $100/month. All tools that work together.
The Discipline Required
The stack only works if you actually use it. The biggest waste I see isn't the wrong tools — it's paying for tools that sit idle because nobody set them up properly or trained the team to use them.
Budget 8-10 hours to set this up correctly. Build the workflows. Train yourself and your team. Then measure results monthly.
Under $100/month, properly used, will outperform a $400/month tool pile that nobody's using to its potential.
