PRICING

Priced for engineers who use Cursor / Claude daily

9 out of 10 solo devs never leave Starter. Pro is for power users and people who want to back the project. Team is for squads that already proved the workflow on individual accounts.

Starter

For solo engineers using Cursor / Claude daily · 9 out of 10 never upgrade

Free Forever · MIT
Install in 30s →
  • Full CLI · zero dependencies · Python stdlib
  • 9 core fields + 3 starter packs
  • fingerprint.py quantification tool
  • Cross-session collapses/ memory
  • Auto-generated .cursor/rules/aether.mdc
  • Works with Cursor / Claude Code / any LLM
  • GitHub issues + discussions support
Most popular

Pro

For power users: premium fields + you want to back the project

$14 / year · ≈¥99
Request via WeChat / GitHub →
  • Everything in Starter
  • Premium field packs: Staff Engineer / PM / author voices
  • Private persona export / import (portable)
  • Unlimited fingerprint analysis
  • Email support · 72h response
  • Access to Day 30+ beta channel

Team

For small teams already running smoothly on Starter / Pro

$45 / seat / year
Contact →
  • Everything in Pro
  • Shared team personas · Git-style diff
  • Enterprise fingerprint API
  • Private field marketplace
  • 1-on-1 onboarding

Not recommended for solo use · Pro is enough

Frequently asked

I'm a solo engineer — Pro or stay on Starter?

If you use Cursor / Claude daily, don't need premium field packs, and aren't in a rush to export personas, Starter is enough. Pro unlocks two things: ① Staff Engineer / PM / author-level premium fields; ② a way to back the open-source project. Upgrade when either becomes true.

Can I try Pro for free first?

Yes. Ping wsl497810 on WeChat with your use case and I'll send a 14-day full-feature trial. Honest feedback matters more to me than the money.

What's in the "premium field packs"?

Planned for Day 1–30 first batch: staff-engineer (systems thinking · engineering tradeoffs), product-designer (Stripe / Linear tone), borges / zhang-ailing (author-level writing voices). Pro subscribers get early access before public release.

Is Team worth it?

Only if at least 2 teammates are already running smoothly on Starter. During the 0-to-1 validation phase, Pro × N seats is cheaper and more flexible.

Will Aether go closed source?

Never. Core CLI + 9 starter fields stay MIT forever. The paid tier is "premium field packs + hosted services", not "closed core infrastructure".