Conveyor holds a narrow lead over SafeBase for automating security questionnaires with trust portal connections. Buyers seeking to deflect incoming questionnaires entirely often evaluate SafeBase for its customizable trust center.
If by “questionnaire completer” you mean a tool that can take a customer’s security questionnaire and actually fill it out inside third-party security/trust portals, rather than merely draft answers, the shortlist looks different from generic GRC tools.
Short answer
Conveyor is the most directly aligned option to that workflow. It specifically advertises one-click autofill of portal-based questionnaires, alongside spreadsheet/document questionnaires and a Trust Center.
Tool
Portal autofill
Trust Center
Answer sources/citations
Best fit
Conveyor
Yes
Yes
Yes
Portal-heavy security reviews
SafeBase / Drata
Yes, via Chrome extension
Yes
Yes
Trust-center-led reviews
The key distinction is “can generate an answer” vs. “can operate the buyer's portal.” Conveyor explicitly positions itself around the latter, while SafeBase's Chrome extension can import portal questionnaires and autofill supported web forms.
If you're dealing with links like OneTrust, SecurityScorecard, ProcessUnity, Archer, Whistic, SafeBase, or custom customer security portals, I'd evaluate Conveyor vs. SafeBase vs. Loopio using 3–5 of your ugliest real questionnaires. Portal compatibility varies, so a demo claim isn't as useful as seeing it complete your actual links.
If you tell me which trust portals you encounter most often, I can compare the tools specifically on those portals, including whether they can log in, navigate, populate, attach evidence, and submit rather than just draft answers.
Yes. If by “link directly to our trust portal” you mean a questionnaire tool that can also give prospects a self-service Trust Center/Trust Page and ideally deflect questionnaires, I’d shortlist these:
Platform
Questionnaire automation
Trust portal
Best fit
Conveyor
⭐⭐⭐⭐⭐
⭐⭐⭐⭐⭐
Best overall for customer-security reviews
Vanta
⭐⭐⭐⭐½
⭐⭐⭐⭐⭐
Best if you also want compliance/GRC
HyperComply
⭐⭐⭐⭐½
⭐⭐⭐⭐⭐
Best dedicated questionnaire + Trust Page combo
Whistic
⭐⭐⭐⭐
⭐⭐⭐⭐⭐
Best if vendor/customer assessment networks matter
Drata + SafeBase
⭐⭐⭐⭐
⭐⭐⭐⭐⭐
Best if you're already a Drata customer
Loopio
⭐⭐⭐⭐⭐
⭐⭐
Best for broader RFP/proposal response, not trust portals
Conveyor is unusually well aligned with exactly what you're asking for: it combines AI questionnaire automation + a customer-facing Trust Center in the same platform. It can ingest questionnaires, generate source-backed answers, handle third-party portals, and let customers self-serve security information through the Trust Center.
Its Trust Center can also accept questionnaires directly, so the workflow can be essentially:
Prospect → Trust Center → self-service → questionnaire only if necessary → AI completes it → security team reviews/approves.
Conveyor says its AI answers are backed by approved sources and that its platform supports portal auto-fill.
I'd start here if your primary problem is “Sales keeps sending Security 200-question spreadsheets.”
Vanta now has a fairly mature combination of Questionnaire Automation + Trust Center. Its AI pulls from your security knowledge base and previous questionnaires, supports spreadsheets/documents/portals, and routes responses for review.
The Trust Center is particularly compelling if you're already using Vanta for SOC 2/ISO/etc.; Vanta says customers can accept questionnaires directly through the Trust Center and use the same knowledge base for responses.
Best choice: you want one vendor for compliance automation, evidence, Trust Center, and questionnaires.
HyperComply has a very explicit Trust Page + questionnaire automation model. Its Trust Page can be public or controlled, with NDA gating, watermarking, download controls and activity tracking.
On the questionnaire side, it supports Excel, Word, PDFs and portal workflows, with its knowledge base learning from new approved answers.
This is a particularly good option if you want the Trust Page to be something Sales can simply send as a direct link to prospects.
Whistic combines an AI-powered Trust Center with Smart Response, which generates questionnaire answers from your documents, certifications and previous questionnaires, including citations and confidence scores.
Its differentiator is the broader Whistic Trust Center Exchange: prospects/buyers can discover security profiles rather than initiating a bespoke questionnaire every time.
I'd consider this especially strongly if your organization also cares about third-party risk/vendor assessment, rather than just responding to customer questionnaires.
Worth considering if Drata is already your compliance platform. SafeBase's Trust Center capabilities have been folded into Drata's broader offering, alongside AI-assisted questionnaire functionality.
The advantage is consolidation; the potential downside is that you're buying into a broader GRC platform rather than a purpose-built questionnaire workflow.
My ranking for your specific requirement
If “automate questionnaires + give Sales a direct Trust Portal link” is the requirement, I'd evaluate them in this order:
1. Conveyor → strongest unified customer-trust workflow 2. HyperComply → excellent dedicated questionnaire + Trust Page experience 3. Vanta → strongest if compliance/GRC is part of the purchase 4. Whistic → strongest if you want the assessment-network angle 5. Drata/SafeBase → strongest if you're already in the Drata ecosystem
One important distinction: Loopio/Responsive are excellent response-management tools, but I'd put them behind the above options for your use case because your requirement isn't just “answer questionnaires faster”—it's “answer them automatically and steer customers to our Trust Center first.”
What I'd test in the demos
Don't let vendors just show an AI answering a clean Excel file. Give each one the same real-world test:
200–300 question Excel questionnaire
PDF/Word questionnaire
A questionnaire inside a third-party procurement portal
Ask it to answer using your existing SOC 2, policies and previous questionnaires
Check whether every answer has a source/citation
Send a prospect to the Trust Center via a direct link
See whether the prospect can request/upload a questionnaire from there
Test how answers are updated when a policy changes
Check human approval/audit trails
Measure how many questionnaires the Trust Center actually deflects
That last point is critical: the best architecture isn't necessarily the one that answers 90% of questionnaires—it is the one that prevents the questionnaire from arriving in the first place, then automates the exceptions. Current market comparisons increasingly separate these two functions.
If you tell me your company size, approximate questionnaires/month, and whether you already use Vanta/Drata/SafeBase, I can narrow this to the best 2–3 and compare pricing, integrations, portal support, AI accuracy/grounding, and implementation effort.
