Education · Do this yourself

Sell technical interview practice for data jobs.

How it makes money: Charge job seekers $29/mo for graded technical interview practice for data roles.

Agent setup: Advanced · Sensitive data or compliance rules need careful checks and high reliability. How we rate this

💰 Dataford makes about $37k a month doing this. $37,133 MRR, verified via Stripe on TrustMRR (synced 2026-10-16)

No X data

Based on Dataford on TrustMRR (opens in new tab)

Who it’s for

Teachers, students, tutors, coaches and anyone learning something new.

Adapt it to your industry

  • Coach: practice exercises and check-ins for your clients
  • Healthcare: simple explainers for patients (checked by a professional)
  • Shop: short how-to guides for your products

Step by step

  1. Write down one problem a specific group of people pays to solve (for example “gym owners losing members”).
  2. Open ChatGPT, Claude or Grok and paste the prompt below to sharpen the idea and list what the first version must do.
  3. Use ChatGPT, Claude or Grok to make the first version of the product for one type of customer.
  4. Create a Stripe account and a Payment Link so people can pay from day one.
  5. Make a one-page website that explains the problem, the fix and the price.
  6. Show it to 10 people from your target group and change what confuses them.
  7. Launch where those people already gather, then ask every new user for feedback.

Ready-to-copy prompt

Give me one realistic SQL interview question for a data analyst role, wait for my answer, then grade it and show a better solution.

Start with AI

Opens the AI with this guide and the prompt filled in.

Open in ChatGPT (opens in new tab)Open in Claude (opens in new tab)Open in Grok (opens in new tab)
Time
2–6 weeks for a first versionOur estimate

Your autonomous stack

Autonomy: Lessons, quizzes and emails are generated and sent on a schedule. Your part: Weekly: spot-check new lessons for accuracy (about 1 hour).

Every layer an agent-run business needs, in order. Prices are public list prices, checked Oct 16, 2026.

  1. Agent (the brain): Grok Bot (agent + scheduled routines) (opens in new tab) (Included with The X Subscription Premium $30/mo (Super $100/mo for more usage; Plus $8 does not include Grok Bot)). Grok Bot runs the business day to day: writes, answers, decides small things and reports to you. Claude Code or Codex are alternatives.
  2. Build and hosting: Lovable (opens in new tab) (Free tier · Pro $25/mo), Supabase database (opens in new tab) (Free tier · Pro from $25/mo). The product or service your customers use.
  3. Payments: Gumroad (sell downloads) (opens in new tab) (No monthly fee · 10% + 50¢ per sale). Automatic checkout and receipts. Other options: PayPal Checkout (3.49% + 49¢) or Lemon Squeezy (5% + 50¢, handles sales tax).
  4. Customer acquisition: Buffer (scheduled X posts) (opens in new tab) (Free plan (3 channels, 10 queued posts each) · Essentials $5/mo per channel, billed yearly), beehiiv newsletter (opens in new tab) (Free up to 2,500 subscribers). Agent-written SEO pages, scheduled X posts and a weekly newsletter.
  5. Delivery: Grok Bot (agent + scheduled routines) (opens in new tab) (Included with The X Subscription Premium $30/mo (Super $100/mo for more usage; Plus $8 does not include Grok Bot)). A Grok Bot routine delivers the product or result as soon as someone pays.
  6. Support: Grok Bot (agent + scheduled routines) (opens in new tab) (Included with The X Subscription Premium $30/mo (Super $100/mo for more usage; Plus $8 does not include Grok Bot)). Grok Bot answers the support inbox; anything unclear is flagged for you.
  7. Monitoring and schedule: Grok Bot (agent + scheduled routines) (opens in new tab) (Included with The X Subscription Premium $30/mo (Super $100/mo for more usage; Plus $8 does not include Grok Bot)). Grok Bot scheduled routines run each day: send, check for failures, alert you if something breaks.
  8. Analytics: Google Analytics (opens in new tab) (Free). Tracks visits, signups and sales so the agent can report what works.
  9. Human checkpoint: Weekly: spot-check new lessons for accuracy (about 1 hour).
  10. Price: charge $29 per customer per month (monthly subscription (saas)). Offer the first 3 customers a founding price for honest feedback.
Monthly cost$30–$97/monthFree tiers → paid plans of the tools above. Card fees come out of each sale.
What you could earn · EstimateEstimate: 10 customers × $29 = $290/moOur estimate, not a fact or a promise. It’s simple math if you land these customers at this price.
Details: source, numbers and tags

What they did

Dataford is a practice platform for technical interviews, sold to job seekers as a subscription.

How it went

TrustMRR shows $37,133 MRR, verified via Stripe (last sync 2026-10-16).

Worth knowing

TrustMRR pulls this figure from the payment provider’s API; the product description is the founder’s own. Revenue can change month to month.

Difficulty
AdvancedOur rating
Time to build
Not reportedOur estimate
Monthly cost
Not reported
Revenue
$37,133 MRR, verified via Stripe on TrustMRR (synced 2026-10-16)Verified: Calculated by TrustMRR from payment-provider data (as the TrustMRR page states)
Engagement
No public countThe source shows no number
X buzz
No X data

Posted · Added Oct 16, 2026

Original builder recipe

  • Question bank
  • Auto-graded exercises
  • LLM feedback
  • Stripe
  1. Pick one concept to learn or teach.
  2. Have the agent build or explain it step by step.
  3. Test your understanding by changing parameters or asking why.
  4. Iterate.

Tags

Tool Stripe

Read the original

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