Free beta
Free
$0
- 5 free citation checks after sign-in
- Crossref and OpenAlex matching
- Source links and review reasons
Simple, honest pricing
Start with the free beta. Paid access is one-time — no automatic subscription.
One-time purchase
Paper Pack
$12.90
- 150 citation checks
- Up to 40 citations per request
- Purchased checks do not expire
One-time purchase
Thesis Pass
$24.90
- 1000 citation checks
- Up to 40 citations per request
- Purchased checks do not expire
How citation checks work
One check verifies one citation. A list of 10 citations uses 10 checks. Checks are restored automatically when every data service is unavailable.
Paddle shows the final amount, currency, and applicable tax before you confirm payment.
How payment worksPaddle Sandbox — no real charge
- 1. Sign in so the purchase is tied to one verified account.
- 2. Complete a one-time payment in Paddle's secure hosted checkout.
- 3. Purchased citation checks are added only after the server confirms the payment.
No automatic renewal. The final amount and currency are shown before payment. Terms · Refunds
Billing questions
Is this a subscription?+
No. Paper Pack and Thesis Pass are one-time citation-check purchases with no automatic renewal.
What happens when I hit my limit?+
The free beta includes a fixed number of citation checks. When they're used, you can buy a one-time package after payments open.