Skip to content
EN
EspañolEnglishPortuguêsItaliano

Vellarin BidStream

Preconstruction software · by Vellarin AI

From the invitation to bid to the proposal you send.

BidStream covers all seven stages of a bid: finding the solicitation, loading the plan set, flagging scope at risk, taking off quantities, estimating, proposing and coordinating subcontractors. AI proposes at every step; the estimator approves.

Book 30 minutesAlready a user? Sign in
  • AI-assisted
  • Estimator-controlled
  • Traceable to the plan

The whole bid

The bid starts long before the takeoff.

The seven stages every bid moves through, and where BidStream sits in each one.

  1. Opportunity

    Find notices and score them against your company profile.

  2. Intake

    Load the plan set and read every title block.

  3. Scope and risk

    Read notes and specs before any takeoff and flag scope at risk.

  4. Takeoff

    AI proposes counts and measurements; you approve each one.

  5. Estimate

    Approved quantities feed the line-item register.

  6. Proposal

    Generate the proposal from the estimate, under your branding.

  7. Post-bid

    Request subcontractor quotes and compare revisions.

32 seconds · Watch on BidStream

Stage by stage

What BidStream does today — no roadmap promises.

Opportunity

  • Bid radar on SAM.gov’s official public API — no scraping
  • Every new notice is tagged by trade and scored against your company profile
  • Runs daily on its own, or on demand whenever you want to search
  • What you have already seen is never reprocessed: the list grows, the noise does not

Project intake

  • Several PDFs at once, with a type and a label per file
  • The set splits in batches and resumes — 90+ sheet sets without losing progress
  • Title block reading: sheet number and title for every page
  • Drawings, specs and other documents are handled differently — a spec carries no scale

Scope and risk

  • Reads notes, cover sheet and specs BEFORE any takeoff
  • Proposes what the bid must protect against: exclusions, allowances, RFIs and scope to sub out
  • Each finding routes to its exit — the exclusion to the proposal, the sub to the subcontracts tab
  • Uncertain scope is flagged for human review

Takeoff

  • Assisted detection on the drawing geometry: proposes copies of a repeated symbol for your review
  • Vision pass for scanned drawings
  • Length, area, volume and angle on a scale confirmed per sheet
  • 3D view: markups rise in height above the plan
  • Review card: approve or reject every proposed detection

Estimate

  • Approved quantities feed the line-item register
  • Adjust a measurement and the line item recalculates itself
  • Estimated cost shown before every AI run — no surprises

Proposal

  • Proposal generated from the estimate, carrying your branding
  • Shareable link with sell prices, without exposing costs or margins
  • Export to PDF with real vector annotations — opens in any reader
  • Exclusions caught back in the scope stage land in the document on their own

Post-bid

  • Trade packages and quote requests out to subcontractors
  • Link-based portal: the sub quotes or declines without creating an account
  • Schedule: AI proposes phases with duration and overlap; you edit all of it. Not a contractual construction schedule
  • Revisions: new sheets link to their previous version and compare side by side

Across the project

  • A copilot that answers from your project data — never with invented numbers
  • It only proposes actions: it shows confirm or cancel, and never writes on its own
  • AI spend caps per organization, with usage in plain view
  • Real-time collaboration: your team works on the same project
  • All in the browser: nothing to install

For specialty contractors with one to five estimators, and the preconstruction teams that bid alongside them.

  • Security and low voltage (Div 27/28)
  • Doors, frames and hardware (Div 08)
  • Fire alarm (Div 28)
  • Electrical
  • Mechanical and HVAC
  • Structured cabling and AV
  • Plumbing
  • Concrete and masonry
  • Drywall, ceilings and finishes
  • Roofing and waterproofing
  • Civil, utilities and sitework
  • General contractors

Designed for these scopes — tell us about yours on the first call.

Go deeper

How it works

AI proposes. Your estimator approves. Nothing submits itself.

Division 27 / 28 · Security and low voltage

Estimating software for security and low-voltage contractors

Division 08 · Doors, frames and hardware

Door and hardware estimating, from the schedule and the plans at once

Division 28 · Fire alarm and detection

Fire alarm estimating: the device count you will have to defend

For estimators working out of a spreadsheet

The spreadsheet is not the problem. The sixth revision is.

Guide · Division 27 / 28 and 08 takeoff

How to take off a low-voltage bid from PDF plans

What almost everyone asks before starting.

If your question isn’t here, call us — 30 minutes with us answers almost everything.

Have another question? Send us a message

What is BidStream?

AI-assisted construction takeoff software, built by Vellarin. Upload the plan set as PDF, confirm the scale, and BidStream helps you count, measure, mark up and organize quantities — with every proposed count visible on its source sheet so your team can approve or correct it.

Does the AI replace my estimator?

No, and we don’t want it to. AI proposes; the estimator approves. A takeoff produces quantities — a complete estimate also depends on labor, materials, equipment, production rates, subcontractor quotes, waste, overhead and commercial judgment. BidStream speeds up the mechanical part and keeps the decisions where they belong.

What do I need to get started?

The plan set as PDF. BidStream works with both vector and scanned drawings — it uses different methods for each — and scale is confirmed before any calibrated measurement. Nothing to install: it runs in the browser and your team can review the same plan simultaneously.

What happens on the 30-minute call?

Thirty minutes on one real process or one real bid of yours, with no commitment. You leave knowing whether it fits and what a start would look like.

One company, three products

More from Vellarin AI

Vellarin AgentsStart free

An AI team for your follow-ups, customer replies and paperwork.

Vellarin HubGet your key

One address and one key for the AI agents you already run.

Vellarin Agents guidesVellarin Hub docs

Start today

See it on a bid you are working on

Book 30 minutes on a bid you are pricing this week. Nothing to send beforehand and nothing staged: we work through your job, stage by stage.

Book 30 minutesAlready a user? Sign in to BidStream