Responsive (formerly RFPIO) is an enterprise RFP and questionnaire platform. FillBase is purpose-built DDQ automation for startups and mid-market SaaS. Here's an honest comparison.
TL;DR: Choose Responsive if you're an enterprise team managing 100+ RFPs per year with dedicated proposal staff. Choose FillBase if you're a CTO or VP Engineering completing 3–15 DDQs per month and need speed over process.
| FillBase | Responsive (formerly RFPIO) | |
|---|---|---|
| Focus | DDQ automation (100%) | RFP + DDQ + proposal management |
| Pricing | Free – $379/mo | Custom (~$30K+/year) |
| Setup time | 30 minutes | 4–8 weeks (implementation required) |
| Slack workflow | Yes — native | Slack notifications only |
| RFP support | No (DDQs only) | Yes (core product) |
| Content library | AI knowledge base | Manual Q&A library |
| Annual contract | No | Yes |
| Source citations | Every answer | Content library references |
| Free tier | 200 req/mo | No |
| Format support | Excel, Word, PDF, portals | Excel, Word, portals |
Responsive was built for enterprise proposal teams managing hundreds of RFPs per year. It excels at project management, reviewer assignments, and content governance. FillBase was built for the CTO who gets a 200-question Excel file from a prospect and needs it done by Friday. Different problems, different solutions.
Responsive uses a manually curated Q&A library where subject matter experts write and review answers. This gives you control but requires ongoing maintenance. FillBase builds its knowledge base automatically from your SOC 2, policies, and past responses — and cites the exact source for every answer.
Yes. RFPIO rebranded to Responsive in 2023. Same product, same team, new name.
FillBase focuses on security questionnaires (DDQs, SIGs, CAIQs). If you need full RFP proposal management with sections, formatting, and multi-stakeholder reviews, Responsive is the better fit.
Responsive requires custom pricing starting around $30K/year with annual contracts. FillBase starts free (75 requirements/month) and scales to $379/month. For a startup, that's a 4–10x difference.
