Proposal software for web developers

Technical clients ask more questions about deliverables than anyone else. Your proposal needs to define what “done” means before the first pull request. What gets built, what gets tested, what is out of scope, and what triggers an additional charge.

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Deliverables defined, not described

What gets built, what gets tested, what gets documented, and what is explicitly out of scope. Clients approve the outcome, not an open-ended statement of intent.

Milestone-based timelines

Break the project into phases with dates. Clients see the full build schedule before they agree to it, which means fewer questions about where things stand mid-project.

Payment milestones

Set payment triggers at signing, at milestone delivery, and at project completion. Clients know exactly when they will be invoiced before work starts.

AI generates the draft

Describe the project: stack, features, integrations, timeline, what the client brings. The AI writes a complete proposal draft in minutes. You adjust the technical specifics rather than building the structure from scratch every time a new brief comes in.

Scope tiers, not hourly estimates

Present a basic build, a standard build, and a full build as packages. Clients choose a fixed scope rather than signing up for an open-ended hourly budget. That conversation goes better for everyone.

Project timeline built in

Gantt charts included. Show discovery, build, testing, and launch phases with dates directly in the proposal. Clients approve the schedule at the same time they approve the scope.

What is included is explicit

Each package lists exactly what is built, what is tested, and what is not covered. Technical clients will ask. Having it written down before they ask saves the conversation and prevents scope creep.

Automated follow-ups

Prosperus sends follow-up reminders at the intervals you set and stops the moment the client responds. No manual chasing, no forgetting to follow up after a proposal sits quiet for a week.

Signed in the browser

Clients approve and sign without printing anything. The signed copy includes the scope they agreed to. When “is that included?” comes up three weeks in, the answer is in the document they signed.

Clients hire developers for outcomes. Define those outcomes before you write a line of code.

Technical proposals that lead with architecture choices and implementation detail lose non-technical decision-makers before they reach the price. Prosperus structures the outcome: what gets built, when it delivers, and what it costs. That is what clients are actually evaluating. A clear scope agreed upfront is also the only protection you have when a client asks for something that was not in the original brief.

Free 7-day trial. No card required.

Scope it clearly. Get it signed. Build it.

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FAQs

Yes. Prosperus supports monthly pricing alongside one-time project fees within the same proposal. Add a support retainer or maintenance package as a separate service.

Yes. Use the Gantt chart to show discovery, build, testing, and launch phases with milestone dates. Clients sign off on the schedule at the same time as the scope.

Yes. Up to three packages per proposal, each with its own scope, timeline, and pricing. Clients choose the build level that fits their brief and budget.

Yes. The Pro plan supports up to 3 users with shared access to proposals, the service library, and client records. Everyone sends from the same brand and pricing structure.

About 10 minutes to configure your services and brand. After that, proposals generate from your inputs in under 10 minutes. Your first will take a bit longer than your fifth.