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FillBase

Starting from

$0/mo

~90 % auto-fill accuracy

Most questions answered automatically from your knowledge base

Works from Slack

Forward a spreadsheet in Slack — get answers back in minutes

Source-cited answers

Every answer linked to the exact document & paragraph

Any format

Excel, Word, PDF — export in whatever the buyer needs

Powered by the latest AI, that fills your questionnaires while you focus on deals.

Included with FillBase

Everything you need to go from "hours per questionnaire" to "minutes."

DDQ, SIG, CAIQ & more

Handles all standard security questionnaire formats out of the box.

Vanta, Drata & Drive sync

Connect your compliance stack — answers stay current automatically.

Set up in 3 minutes

Install the Slack app, connect a knowledge source, and go.

SOC 2 aligned

Your data is handled with enterprise-grade security practices.

You're also getting

Answer consistency tracking

Never contradict yourself across questionnaires.

Trained on your knowledge

Gets smarter with every questionnaire you complete.

Powered by latest AI models

GPT-4o, Claude, and custom retrieval models — always improving.

Also included with FillBase

Source citations on every answer

Each response links to the exact policy paragraph or prior DDQ — audit-ready for your buyer's security team.

Team @mentions

Fili routes questions to engineering, legal, or compliance in Slack when it needs a human answer.

Buyer template parsing

Reads your buyer's Excel, Word, or PDF structure — formulas and conditional rows stay intact.

Deal-channel notifications

Get completion updates in the same Slack thread where the questionnaire landed.

Buying with FillBase

24/7 priority support

Fast help with setup and integrations whenever you need it.

Money-back guarantee

Try it risk-free. If it is not for you, request a refund within 14 days.

Secure checkout

256-bit encrypted checkout with Stripe.

Rated excellent on Trustpilot

Trusted by teams

Trusted by business owners

Teams use FillBase to complete security questionnaires faster and close enterprise deals.

"FillBase cut our DDQ turnaround from 2 weeks to 2 hours. We closed our first enterprise deal the same month."

- Head of Sales, Series B SaaS

"I used to spend every Friday filling out questionnaires. Now I forward them in Slack and they are done before lunch."

- CTO, Seed-stage startup

"The source citations are a game-changer. Our enterprise buyers love that every answer is traceable."

- VP Engineering, Growth-stage fintech

Backed by a money-back guarantee

Try FillBase risk-free

Test FillBase on your next DDQ. If it is not for you, request a refund within 14 days and you are covered.

"I used to spend every Friday filling out questionnaires. Now I forward them in Slack and they are done before lunch."

- CTO, Seed-stage startup

14-day money-back guarantee

Available anytime

24/7 customer support

Get fast help with setup, integrations, and questionnaires — so you are never stuck waiting to move forward.

FAQ

Can I start for free?
Yes — the Free plan gives you 75 requirements/month, a Slack AI agent, one knowledge source, and full export to Excel, Word, or PDF. No credit card required.
How does billing work?
Paid plans are billed monthly or yearly via Stripe. You can upgrade, downgrade, or cancel anytime from the billing portal — no questions asked.
Is there a money-back guarantee?
Absolutely. If you are not satisfied within the first 14 days we will refund every cent, no questions asked.
What questionnaire types are supported?
DDQ, SIG Core, SIG Lite, CAIQ v3/v4, VSAQ, HECVAT, VRA, and custom-modified spreadsheets. If it is a security or vendor questionnaire, FillBase can handle it.
How accurate is the auto-fill?
FillBase auto-completes roughly 90% of questions. Every answer includes a source citation. If it does not know, it asks you instead of guessing.
How long does setup take?
About 3 minutes. Install the Slack app, connect at least one knowledge source (SOC 2 report, Vanta, Google Drive), and you are live.
Can I connect Vanta or Drata?
Yes — on Starter and above, FillBase syncs directly with Vanta, Drata, Google Drive, and Notion. Your answers stay up to date as your compliance posture changes.
Is my data secure?
FillBase follows SOC 2 aligned security practices. Data is encrypted in transit and at rest. We never train on your data and never share it with third parties.
Can I cancel anytime?
Yes. Cancel from the billing portal whenever you want. You will keep access until the end of your billing period.
Do you offer annual discounts?
Yes — yearly plans save 20% compared to monthly billing.