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Nicola Manzini (@NicolaManzini)

AI-built game · last checked 15 Oct 2026

VibeSail

● ClaimedMRR⚠ Cautionary case

Cautionary case. We include this story as a warning, not a model to copy — read the risks and the timeline before drawing conclusions.

TL;DR

  • Figure: ~$100 MRR (MRR · Jun 2026 · founder X post (peak ~$4.6K MRR, Mar 2025))
  • Proof level: Claimed. Founder self-reports on X; no payment-provider data. The decline is also self-reported.
  • Our verdict (1/10, opinion): Replicability today: 1/10 — cautionary case. A hype spike during the early-2025 vibe-coded game wave, followed by collapse. Novelty fades fast.

Reported figure

~$100 MRR

Proof level

Claimed

Agentic-ness (opinion)

2/5

Replicability (opinion)

1/10

The story

Nicola Manzini built VibeSail in early 2025 during the vibe-coded browser-game trend; it went viral on X and was covered by Indie Hackers.

  1. 10 Mar 2025 — $3.5k MRR — third-party leaderboard post (secondary)
  2. 24 Mar 2025 — ~$4.6k MRR, 21k players — founder post on X (peak)
  3. 1 Jun 2026 — MRR dropped to ~$100; ~1k players/day — founder post on X

⚠ Starter Story's "$8K MRR (Apr 2025)" exceeds the founder's own peak and is unsupported; we do not use it.

Business model

  • What it sells: sponsored islands, branded yachts, banners and rewarded ads in a free game.
  • To whom: brands/sponsors; players play free.
  • Pricing: Research in progress.
  • Acquisition: X virality; Indie Hackers coverage.

AI stack

ToolRoleMonthly cost
AI coding tools (not named)Writing the game codeUnknown

Proof

Sources:

Why "Claimed": founder self-reports on X; no payment-provider data. The decline is also self-reported.

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Agent blueprint

Our suggestion — not how the founder did it

  1. Step 1

    Builder agent

    Codes the browser game with an AI coding assistant

  2. Step 2

    Sales agent

    Pitches sponsored islands and branded yachts

  3. Step 3

    Analyst agent

    Tracks players and revenue to spot decay early

Human in charge

A person approves money, public posts and key decisions. We don't estimate how much human work this saves.

Agentic-ness today (our estimate): 2/5 · Difficulty: Hard

Risks & limits

  • Novelty decay: ~$4.6k → ~$100 MRR.
  • Sponsor revenue tied to hype.
  • No moat.

Our verdict

Editorial opinion

1/10

Replicability today: 1/10 — cautionary case. A hype spike during the early-2025 vibe-coded game wave, followed by collapse. Novelty fades fast. (Editorial opinion.)

Similar cases

Figures as reported by the cited sources on the dates shown. Verdict, ratings and blueprint are editorial opinion. Not financial advice. No income guarantees.