For public-sector organizations, I'd estimate implementation time based on scope rather than the vendor name alone. A limited government Ai chatbot that answers questions from approved public webpages can potentially launch within a few weeks. Adding SSO, live-agent handoff, CRM or ticketing integrations, and department-specific workflows can extend the project to several weeks or months.
Granicus GXA, Microsoft Copilot Studio, and GovAssist by App Maisters Government are options worth evaluating, but their timelines will depend on your agency's requirements and readiness. Make sure your project plan includes security and accessibility reviews, content validation, user acceptance testing, and staff training.