Integration

    STACK and Volty

    Contractors who estimate in STACK let Volty tell general contractors where a bid stands, and give project managers a takeoff quantity without opening the plans.

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    Updated

    Drywall bid, due Friday

    Patricia emails about the Linden Avenue bid. Volty finds the estimate in review in STACK.

    PN

    Patricia Nguyen

    Email · General contractor

    Hi, checking on your drywall bid for the Linden Avenue medical office. Bids are due Friday.
    Checked STACKLinden Ave Medical Office · Estimate in review · Due Nov 6
    VoltyHi Patricia, our estimate for Linden Avenue is in final review with Ray, our chief estimator. You will have it before the Friday, November 6 deadline.

    STACK project

    Linden Ave Medical Office

    In review
    Scope
    Drywall and framing
    Wall area
    38,400 sq ft
    Estimator
    Ray Delgado
    Bid due
    Fri Nov 6

    Projects, takeoffs and estimates the account shares

    What Volty does with STACK

    STACK is cloud takeoff and estimating software where subcontractors and builders measure plans and price bids. Volty reads a project's estimate status so a general contractor emailing about a bid hears where it stands and when it will arrive. Project managers ask Volty in team chat for a quantity off a takeoff without opening the plans.

    • Bid status for GCs

      The estimate's stage and the bid due date, read before Volty replies.

    • Quantities without the plans

      Linear feet, square feet or counts from a takeoff item.

    • Invitations to bid captured

      Plans that arrive by email become a draft project for an estimator.

    • New projects approved first

      Creating a STACK project starts Off and can wait for a colleague.

    A framing crew at work on new houses while three people in hard hats read a set of plans in the foreground.
    A linear foot total pulled off the takeoff for the field.

    6,210 feet of base

    Kayla needs a number for an order. Volty reads the takeoff item on Maple Street Townhomes.

    Estimating team

    Volty · Team chat

    K

    Kayla

    How many linear feet of base on the Maple Street takeoff?

    Checked STACKMaple St Townhomes · Wood base · 6,210 LF

    VoltyAPP

    The Maple Street Townhomes takeoff has 6,210 linear feet of wood base.

    As an automation

    Describe it to Volty in a sentence; it drafts the automation and an admin turns it on.

    Bid invitations into STACK

    1. When

      Plans arrive by email

      From a general contractor

    2. Step 1

      Pulls out the basics

      Job name, trade scope, bid date

    3. Step 2

      Drafts a STACK project

      An estimator approves it

    4. Step 3

      Pings estimating

      With the due date

    A woman talking with a contractor holding a clipboard in front of a house, a pickup loaded with tools in the driveway.
    A GC's bid check answered with the estimate's review stage.

    How Volty connects to STACK

    STACK's API is an approved-partner API with OAuth 2.0 and a sandbox. Access starts with a request on STACK's developer site, and the Volty team sets Volty up from there as a custom connection to your STACK account.

    1. 01

      Request API access from STACK

      STACK reviews requests within two business days and holds a kick-off call.

    2. 02

      Build and test in the sandbox

      Volty's calls are tried against a sandbox partner account before your live data.

    3. 03

      Authorize Volty on your account

      Through STACK's OAuth flow, so Volty acts with the access you grant.

    4. 04

      Approve and set switches in Volty

      An admin approves the connection once. Each tool is On, Check with staff, or Off.

    The tools Volty gets

    Each one is a switch on the Sources page in Volty.

    • Find projectReads
    • Read takeoff quantitiesReads
    • Read estimate statusReads
    • Draft new projectChanges

    Reading tools can be turned on straight away. Anything that changes STACK starts Off, and once on it can be set to check with staff, so each change waits for a colleague.

    Common questions

    Does STACK give API access to any account?

    No. STACK's API is for approved partners. You or our team request access on STACK's developer site, STACK reviews it within two business days and holds a kick-off call, and work starts in a sandbox. Your account then authorizes Volty through STACK's OAuth 2.0 flow.

    Can Volty read the takeoff quantities on my plans?

    Yes, for the projects you agree to share. Volty reads takeoff items and their quantities, such as linear feet of base or square feet of drywall, and gives the number with the project name. It does not measure plans or change a takeoff.

    Will Volty send a bid price to a general contractor?

    Only if you set it up that way. In the example, Volty tells the GC the estimate is in review and when to expect it. Sharing a price is a decision for your estimator, and you can keep estimate totals out of what Volty reads.

    How much does it cost to connect STACK with Volty?

    Every Volty plan includes seats, active contacts and AI credits and starts with a free 7-day trial, and the plan prices are on voltade.com/pricing. Meta bills message charges separately for WhatsApp, Instagram and Messenger.

    Sign up for our 7-day trial. No credit card needed.

    Not convinced? Hear more from our CEO and Volty

    The Leonard and Volty Show · 8 October 2026

    Meta now charges for WhatsApp replies

    Meta now charges for WhatsApp replies. Here's what it means for your business, 8 October 2026