Pricing
Start free. Upgrade when it matters.
The free experience is designed to be genuinely good for casual use. Pro removes all daily limits. Or top up tokens when you need a bit more — no subscription required.
Free
$0
No credit card required
- 30 tokens / day
- 1 stumble = 1 token · Think = 5 tokens
- On This Day first stumble
- Likes, saves, and history
- Interest filters
- Synced across devices
Pro
$9 / month
Billed monthly · cancel any time
- Unlimited stumbles
- Unlimited Think
- Everything in Free
- Priority corpus updates
- Early access to new features
Token top-ups
Hit your daily limit? Buy a one-time bundle — tokens never expire and roll over day to day.
300 tokens
$3 · 1¢ / token
1,000 tokens
$8 · 0.8¢ / token
3,000 tokens
$20 · 0.7¢ / token
Common questions
Do I need an account to use StumbleU?
No. You can stumble as a guest with 5 tokens per day. A free account gives you 30 tokens, Think access, and synced history.
What counts as a token?
Each stumble costs 1 token. Each Think call costs 5 tokens. Your daily token pool resets at midnight UTC. Bonus tokens from top-ups never expire.
What is Think?
Think is an AI feature that analyses whatever page you're reading — giving you a quick take, the deeper questions it raises, and adjacent ideas worth exploring. It works on any page, not just ones you stumbled to.
What's the difference between Pro and token top-ups?
Pro removes all daily limits permanently for $9/month. Top-ups are one-time purchases for users who occasionally hit their limit but don't need unlimited access every day.
Can I suggest pages to add to StumbleU?
Yes. Use the + button in the extension popup to suggest any URL. Submissions are reviewed before being added to the corpus.
How do I cancel Pro?
From the Account tab in the extension dashboard at any time. Access continues until the end of your current billing period.