Video summary

The Real Cost of AI App Builders (I Built the Same App in All)

Main summary

Key takeaways

Product Review

Product(s) reviewed

The video compares four AI app-builder platforms by building the same card-collecting web app using the same prompts, then measuring:

  1. Whether prompts produce working output
  2. The real cost, including retries and hidden “re-prompting” costs
  3. Overall value/efficiency (lowest cost for working functionality)

Platforms tested:

  • Bolt
  • Replit
  • Lovable
  • Base44 (called “Base 44” / “Base44”)

Key findings (cost & performance)

Overall winner (most consistent + lowest cost): Base44

  • Total: ~$4 (using ~20 messages across 6 prompts)
  • Claims: 0 retries
  • Multiple complex components handled in single prompts

Biggest differentiator: native functionality Native auth/database/collections + built-in AI reduces both prompt count and failure risk.

Runner-up (very consistent, low cost, but more retries than Base44): Lovable

  • Total: ~$7.73 (using ~30.9 credits across 9 prompts)
  • Stripe/premium/AI scanning feature was “usually hardest”:
    • Took ~3 prompts with revisions, but still worked
  • Proactive behavior:
    • It set up login/auth early without being asked, saving steps

Mixed / decent for simple parts, but expensive when integrations fail: Replit

  • Total: ~$31.23 (14 prompts)
  • Stripe + premium + AI scanning is the budget killer:
    • Took 6 prompts, cost ~$15.15 (nearly half the total)
  • Authentication required an extra prompt
  • Strong point: pricing transparency
    • Direct dollar cost tracking per step

Most problematic / biggest cost volatility: Bolt

  • Total: ~$18.25 (18+ prompts)
  • Similar failure pattern to Replit, but worse in this test:
    • Stripe + AI scanning: 10+ prompts, cost ~$9
    • Still didn’t fully work (considered a failed feature)
  • Authentication required 2 tries (cost doubled for that portion)
  • Stripe integration required external AI key/API complexity because Bolt lacked built-in AI

Unique points mentioned about the platforms

Bolt — features & behavior

Pros

  • Handles simpler UI/features well:
    • Foundation, card gallery, modal: single prompt, no revisions, low cost
    • Marketplace built successfully in one prompt
  • Token-based model is straightforward to calculate (token → $ mapping described)

Cons

  • High cost + many retries on complex integrations
  • Stripe + AI scanning failed in the test despite heavy prompting
  • Needs external AI API key (no built-in AI), adding friction
  • Authentication required multiple attempts (extra cost)

Cost highlights (from the test)

  • Foundation: ~$0.50
  • Card adding/gallery: ~$1.25
  • Modal: ~$0.75
  • Authentication: ~$2 (needed 2 prompts)
  • Stripe + premium + AI scanning: ~$9 (10+ prompts; still broken)
  • Total build cost: ~$18.25

Replit — features & behavior

Pros

  • Good pricing clarity: shows total $ cost per build step (no token conversion confusion)
  • Many simpler features work in single prompts
  • Stripe/premium/AI scanning ultimately works (unlike Bolt), after retries

Cons

  • Complex integration is extremely expensive:
    • Stripe + premium + AI scanning took 6 prompts and cost ~$15.15
  • Authentication needed 2 prompts with one revision
  • Transparent pricing doesn’t prevent overspending if retries are required

Cost highlights

  • Foundation: ~$0.74
  • Card feature: ~$1.12
  • Viewing modal: ~$1.91
  • Authentication: ~$1.01 (after 2 prompts)
  • Stripe + premium + AI scanning: ~$15.15 (6 prompts)
  • Total build cost: ~$31.23

Lovable — features & behavior

Pros

  • Most consistent after Base44
  • Many features completed in single prompts
  • Proactive login/auth setup during the card feature step (even though not explicitly requested)
  • Stripe/premium/AI scanning works in the end with fewer retries and lower cost than Replit/Bolt

Cons

  • Stripe/premium/AI scanning still needs a few attempts (3 prompts + revisions)

Cost highlights

  • Foundation: ~$0.58 (2.3 credits)
  • Card feature: ~$1.15
  • Modal: ~$0.65
  • Stripe + premium + AI scanning: ~$1.70 (3 prompts, some revisions)
  • Total build cost: ~$7.73 (9 prompts, ~30.9 credits)

Base44 — features & behavior

Pros

  • Best efficiency:
    • Auth/database handled natively (no prompts/messages spent)
    • Collections + wish list included automatically
    • Native AI (no external API keys)
    • Stripe/premium/AI scanning done in one prompt
    • Marketplace done in one prompt
  • Most predictable pricing:
    • messages pricing is simple and fixed per month
  • For this app, it avoided retries entirely and kept “complex steps” cheap

Cons

  • No explicit downsides mentioned beyond reliance on their native built-in capabilities

Cost highlights

  • Foundation: ~$0.40 (2 messages)
  • Card feature: ~$0.80
  • Modal: ~$0.60
  • Stripe + premium + AI scanning: ~$1.00 (5 messages, 1 prompt)
  • Total build cost: ~$4 (20 messages, 6 prompts)

Main “pros vs cons” distilled

  • AI builders can look cheap, but real savings depend on how often you must re-prompt when integrations break.
  • Platforms without native built-in components (notably Bolt lacking built-in AI) can require extra work/API keys and additional prompts.
  • Transparent pricing alone (Replit) doesn’t prevent overspending if complex features require many retries.
  • Best value comes from native coverage + first-try success (Base44 and, to a lesser extent, Lovable).

Comparisons made

  • Same app + same prompts used across all four platforms for fairness.
  • Common pattern highlighted:
    • Simple UI tasks = usually cheap and easy for all
    • Complex integrations (Stripe + premium + AI scanning) = where costs explode and/or fail (except Base44 and Lovable)

Ratings / numerical scores

No explicit star ratings were given. The video provides several totals and per-feature costs:

  • Base44: ~$4 total
  • Lovable: ~$7.73 total
  • Bolt: ~$18.25 total (with Stripe/AI feature failing)
  • Replit: ~$31.23 total

Overall recommendation / verdict

Choose Base44 if you want the lowest real cost and highest reliability from this experiment—its native auth/db/collections and built-in AI prevented retries and kept the build to about $4.

Choose Lovable as the next-best option—efficient and consistent, with proactive behavior and working Stripe/AI, landing around $7.73 total.

Avoid Bolt if your project requires complex integrations like Stripe + AI scanning, since the tested feature didn’t work and cost ~$9 after heavy prompting.

Be cautious with Replit if you’re budget-limited: pricing is transparent, but complex integrations can become very expensive—~$15.15 just for Stripe/premium/AI in this build, totaling ~$31.23.

Final “clear winner”: Base44.

Original video