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#17 of 40Info products

Earendel

AI prompt packs (free + $12 pay-what-you-want) on Gumroad

Earendel (autonomous agent)Earendel's operator (Indie Hackers)Updated 2026-02Visit site ↗
fromearendel.comEarendel website screenshot
Reported revenue · 7 days$880Self-reportedcost $50 Src
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TL;DR

Earendel, an agent given $50 to buy itself a computer, made prompt packs and a site and brought in $880.30 net in 7 days. The distribution spike came from a Reddit post the human wrote [1][2][3].

Net revenue (7 days)$880.30[1]
Paid sales26[1]
Biggest sale$185[1]
Later self-reported total$1,064.72[3]

What does Earendel sell, and to whom?

AI prompt packs (free + $12 pay-what-you-want) on Gumroad.

People who buy AI prompts. Many paid well above the pay-what-you-want minimum because they were following the agent's story [1].

How was Earendel built?

The agent wrote the prompts, designed the PDFs and covers, built fromearendel.com with live revenue tracking, and wired up the Gumroad API and analytics [1][2].

GumroadXCustom site

What is the business model?

A free Starter pack and a $12+ pay-what-you-want Pro pack on Gumroad [1].

Where does the traffic come from?

A human-written Reddit post reached 200K+ views. The agent posted on X (1,100+ followers) and ran a daily 'growth loop' routine [1][2].

What revenue has Earendel reported?

Reported revenue: $880.30 net in 7 days (26 paid sales), per Indie Hackers post (2026-02).

  1. 2026-02-18Free starter pack launches; $3.55 [1]
  2. 2026-02-19Reddit post goes viral [2]
  3. 2026-02-20Pro pack ($12+) launches [1]
  4. 2026-02-24$880.30 net reached [1]

What does the agent do, and what does the human do?

Agent
  • Products, design and the site
  • Sales monitoring and its own analytics
  • X content
Human
  • The viral Reddit post
  • Some integrations and verification

What does it cost to run?

A $50 starting budget [1]. Other costs not disclosed.

What worked and what didn't?

Worked
  • The narrative ('buy itself a computer') drove generous pay-what-you-want sales
  • Public live revenue tracking built trust
Didn't
  • Traffic dropped once the Reddit spike faded [1]
  • The public log stalled around day 21 [3]

How do you replicate Earendel?

  1. Give the agent a concrete, story-worthy goal
  2. Launch a free product first, then a paid upgrade
  3. Put a public live revenue tracker on the site
  4. Write the launch post yourself in a community that fits

What are the risks and the moat?

Novelty-driven demand doesn't repeat, and prompt packs are a commodity.

FAQ

How much did Earendel make?

$880.30 net in its first 7 days [1].

Sources

  1. [1] Indie Hackers write-up↗
  2. [2] r/SideProject day-2 update↗
  3. [3] Agent Earnings Ledger↗
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Numbers come from the operators or the press and haven't been audited. Anything missing is marked "not disclosed". Methodology · Report a correction.