Simple, transparent pricing
Start free with 5 lookups per day. Upgrade when you need more.
Free
Perfect for occasional lookups
- 5 lookups per day
- Basic definitions
- No account required
- Save history
- Export definitions
BYOK
Bring your own API key
- 1,000 lookups per day
- Use your Anthropic API key
- Save lookup history
- Priority support
- Export definitions
Premium
For power users and teams
- 10,000 lookups per day
- Use your Anthropic API key
- Unlimited history
- Export to flashcards
- Team workspaces
- API access
Why upgrade?
More Lookups
Free tier gives you 5/day. BYOK unlocks 1,000/day for all your learning needs.
Your API Key
Use your own Anthropic API key for complete control and cost transparency.
Save History
Keep a searchable record of all your lookups. Never forget what you've learned.
Export Definitions
Export to flashcards, Anki, or CSV. Take your learning anywhere.
Team Workspaces
Share term collections with your team. Build company-wide glossaries.
API Access
Integrate definitions into your apps, docs, or workflows via our API.
Frequently asked questions
What is BYOK?
BYOK stands for 'Bring Your Own Key'. You can use your own Anthropic API key to power the definitions. This gives you full control over costs and usage.
How do I get an Anthropic API key?
Sign up at console.anthropic.com, add a payment method, and generate an API key. Then add it in your WhatIsIt.ai settings.
Can I cancel anytime?
Yes! You can cancel your subscription at any time. You'll keep access until the end of your billing period.
Do you store my API key securely?
Yes. Your API key is encrypted at rest and only used to generate definitions when you make a request. We never share or log your key.