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A data-grounded look at how these two productivity & automation tools stack up — to help you pick the right productivity & automation tool in 2026.
Quick verdict
There's barely a point between Cassidy and Fillout on our Editor Score. Pick Cassidy if you want unified company knowledge base for grounding; choose Fillout for AI form, survey, and quiz generation. On pricing, Fillout is the one with a free or freemium plan, so it's the cheaper place to start.
| Pricing | Paid | Freemium |
| Free tier | ||
| Best for | unified company knowledge base for grounding | AI form, survey, and quiz generation |
AI agents and workflows grounded in company knowledge
AI-powered forms, surveys, and quizzes for teams
Choose Cassidy if…
Choose Fillout if…
It comes down to fit, not a single winner: Cassidy leans into unified company knowledge base for grounding, while Fillout is built for AI form, survey, and quiz generation. Weigh features and pricing for your workflow. Fillout is the lower-cost place to start thanks to its free or freemium plan; the other is worth a trial if its feature set fits better.
Neither is universally better — it depends on your budget and which features matter most. The side-by-side breakdown above shows where each one wins.
Cassidy (paid) is best for unified company knowledge base for grounding, while Fillout (freemium) is best for AI form, survey, and quiz generation. See the full feature and pricing comparison above.
Fillout has a free or freemium plan, so it's the cheaper way to start. For paid plans, check each tool's current pricing on its review page.
Fillout is usually the easier starting point thanks to a lower barrier to entry. Beginners should favour a free tier and a simple interface over raw power.
Other head-to-heads in the same category.
Senior AI Tools Reviewer
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Last updated August 2026. Comparisons are ranked by our Editor Score (features, value and pricing, blended with verified user reviews where a tool has them) — see our methodology.