Clerk vs Fillwarden
Both sit in security & privacy. Here is how they differ on the things you can actually check.
On price: Clerk starts $4 a month cheaper than Fillwarden ($25 against $29, 14% less) on its Pro tier. Paying annually takes Clerk to $20/mo (20% off). Both figures were read from the vendors' own pricing pages on the dates shown below.
Clerk
clerk.com
Authentication and user management with ready-made components, organisations, MFA and session handling for modern frameworks.
Fillwarden
fillwarden.pages.dev
For B2B software teams answering enterprise security questionnaires. Completed questionnaires you import become an answer library; Fillwarden then matches each question in a buyer's Excel or CSV file, such as a SIG Lite or CAIQ, to your past answers, marks each row as a strong match, one to check or no match, and gives back the buyer's own workbook filled with its formatting kept. It does not write new answers or read PDF or Word questionnaires, and files are read and saved in your browser rather than uploaded. Free covers an unlimited library and matching, with up to 20 answers written into each downloaded file; Pro writes every matched answer, with a 14-day money-back promise.
| Clerk | Fillwarden | |
|---|---|---|
| Entry price | $25/mo | $29/mo |
| Entry plan | Pro | Pro |
| Paid annually | $20/mosave 20% | — |
| Price checked | 19 Oct 2026 | 4 Nov 2026 |
| Pricing model | Free plan | Free plan |
| Free plan | Yes | Yes |
| Category | Security & Privacy | Security & Privacy |
| Around since | 2020 | — |
Every price here was read from the vendor's own pricing page, most recently on 4 Nov 2026. Entry tier only — vendors change pricing without notice.
Clerk vs Fillwarden, answered
- Is Clerk cheaper than Fillwarden?
- Yes. Clerk starts at $25 a month against Fillwarden's $29, 14% less.
- Do Clerk or Fillwarden have a free plan?
- Both do. Clerk and Fillwarden each publish an ongoing free tier rather than a time-limited trial.
- What is the difference between Clerk and Fillwarden?
- Clerk: Authentication and user management with ready-made components, organisations, MFA and session handling for modern frameworks. Fillwarden: For B2B software teams answering enterprise security questionnaires. Completed questionnaires you import become an answer library; Fillwarden then matches each question in a buyer's Excel or CSV file, such as a SIG Lite or CAIQ, to your past answers, marks each row as a strong match, one to check or no match, and gives back the buyer's own workbook filled with its formatting kept. It does not write new answers or read PDF or Word questionnaires, and files are read and saved in your browser rather than uploaded. Free covers an unlimited library and matching, with up to 20 answers written into each downloaded file; Pro writes every matched answer, with a 14-day money-back promise.
- Which one is cheaper paid annually?
- We can't say for sure. Clerk drops to $20 a month paid yearly (20% off), while we could not read a yearly price for Fillwarden, which is $29 month to month. Fillwarden would need to take more than 31% off for paying yearly to come in under Clerk's $20.
