RFP & DDQ response software,
honestly compared
How Diligio compares with the major RFP, due-diligence, and security-questionnaire tools, on pricing, AI accuracy, and where your data lives.
Head-to-head comparisons
The leading tools take different routes. Responsive (formerly RFPIO) is the enterprise incumbent, Loopio is the mid-market workflow favourite, AutogenAI is a generative bid-writing engine, and Arphie is an AI-native newcomer. Diligio is a flat-priced, verification-first alternative: one model drafts each answer strictly from your knowledge base, and a second independent model verifies it before you review it.
Diligio vs Responsive
The enterprise incumbent, compared with a flat-rate, verification-first alternative.
Read the comparisonthe mid-market workflow favouriteDiligio vs Loopio
A polished library and workflow, compared with a flat-rate, verification-first alternative.
Read the comparisonthe generative bid-writing engineDiligio vs AutogenAI
Generative bid writing, compared with grounded, verification-first answering.
Read the comparisonthe AI-native newcomerDiligio vs Arphie
Two modern, AI-native tools, compared on verification, pricing, and data residency.
Read the comparisonWhat to look for when comparing
Four questions separate these tools more than feature lists do. New to the processes themselves? Start with the guides.
How the AI prevents hallucinations
Single-model drafting puts the burden on a reviewer to catch errors. Independent verification, where a second model checks each claim against the source and withholds weak answers, enforces accuracy before review.
Whether pricing is published
Most tools in this category are sold by custom quote with no public rate card and seat-based scaling. A flat, published price removes both the sales cycle and the per-seat maths.
Where your data is stored
Data residency (for example, EU at rest) is often a fixed requirement for European buyers, and many vendors do not specify a default region publicly.
What is included versus an add-on
SSO, API and agent access, translation, and implementation are frequently gated behind higher tiers or sold separately. Check the total cost, not the headline.
How we compare
Competitor details are publicly reported as of June 2026. None of these vendors publishes an official rate card, so every price is hedged and dated. We credit each tool's genuine strengths before drawing contrasts, and Diligio's claims map to shipped capability. If you spot anything out of date, email support@diligio.co and we will correct it.
Frequently asked questions
What is the best RFP and DDQ response software in 2026?
The best tool depends on your priority. Responsive (formerly RFPIO) suits large enterprise bid teams; Loopio suits mid-market teams wanting a polished library; AutogenAI suits persuasive long-form bid writing; Arphie and Diligio are modern AI-native options. Diligio focuses on verified accuracy and a flat, published $7,499/year price.
Which RFP tools publish their pricing?
As of June 2026, Responsive, Loopio, AutogenAI, and Arphie are all sold by custom quote without a public rate card. Diligio publishes a flat $7,499 per year that includes the AI, SSO, and API access, so you can compare cost without a sales call.
What should I look for when comparing RFP and questionnaire tools?
Look at how the AI prevents hallucinations (single-model drafting versus independent verification), whether pricing is published and flat or seat-based with add-ons, where your data is stored, whether your content is used to train models, and whether SSO and API access are included or sold as upgrades.
Compare Diligio on your own documents
The fastest comparison is your own questionnaire. Upload one and see how Diligio drafts and verifies each answer against your sources.