Proposal XL - 2026 Pricing, Features, Reviews & Alternatives

Proposal XL is web-based proposal software built for engineering and architecture firms, covering civil, structural, MEP, and architecture practices. It produces scope, fee, and finished proposal documents in a single workflow, drawing from the firm's own templates, current billing rates, and a shared record of people and projects. The platform handles both relationship proposals, such as scope-and-fee letters for existing clients, and competitive pursuits, including RFP/RFQ responses, agency SOQs, on-call task orders, and additional-services letters.

Proposal XL reads a client email or RFP to extract services, site visits, due dates, and requirements, then structures the response automatically and matches scope tasks from the firm's existing library. Fee is calculated phase by phase at current rates with margin visible before the proposal is sent, catching stale rates or under-staffed tasks before client delivery. RFP sections, page limits, and requirements become the proposal outline directly, reducing manual structuring. Team pages and resumes are drawn from one shared staff and project record, keeping content current across all proposals. Section ownership can be assigned, changes are tracked by author and time, and a pre-submission check validates the response against both RFP requirements and the firm's own rules. The finished document is produced as a branded PDF on firm letterhead. All active proposals and their statuses are tracked in a single pipeline. Setup is a one-time fee; ongoing access is a monthly subscription. Integration with existing CRM, ERP, and billing-rate systems is configured during setup.