Features

Obrarum AI

Estimates

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Construction estimating software

Describe the job. Obrarum AI drafts the estimate.

Generate itemized estimates instantly, let AI suggest items and catch costing errors before you send, and get your client's signature with a simple link.

Draft your estimate free

No credit card • Free forever • Ready for signature

Why do construction estimates take so long and still go wrong?

Estimating in a spreadsheet and closing by email works until a line goes missing, a margin slips into the red or nobody knows what the client agreed to.

  • A new spreadsheet for every job

    You copy an old file, change the rows and hope the formulas still add up. A week later, you can't tell which version the client has.

  • Mistakes you find too late

    A wrong unit, a repeated line or a price left at zero shows up once the client already has the quote. The difference comes out of your margin.

  • No clear yes from the client

    A text saying "looks good" is not an approval. If the client changes their mind mid-job, you can't prove what they agreed to.

With Obrarum, your estimate takes seconds to draft, goes out checked and comes back signed.

AI estimate drafts

How does Obrarum AI draft a construction estimate?

Obrarum AI turns your description into chapters and items from your library and Obrarum's. You choose what goes into the estimate.

  1. Describe the job

    Write it like you would tell a colleague: the size, the rooms and what needs to be done.

  2. Get the chapters and pick the items

    Obrarum AI sorts the job into chapters, with items from your library first and the Obrarum library for whatever's missing. Uncheck what you don't need.

  3. Add them to the estimate

    Move them over in one click and start with the estimate already built.

More about AI estimate drafts
Obrarum House Remodel

Bathroom remodel, 60 sq ft. Remove flooring, replace vanity and supply lines. Keep the existing toilet.

Obrarum AI is drafting…

  • Demolition

    • Remove existing flooringYour library$150.00

  • Plumbing

    • Copper supply line, 1/2 inObrarum library$132.00
    • Install vanity$1,200.00

  • Finishes

    • Interior paint, two coats
Add to estimate (4)Add to estimate (3)

Subtotal$1,482.00

AI-suggested estimate items

How does Obrarum AI suggest items while you build an estimate?

While you build the estimate, Obrarum AI proposes what each chapter usually includes and what goes with each item. You decide what stays.

  1. Name a chapter

    Obrarum AI proposes the items that chapter usually includes, with the ones from your library first. You never start a chapter from scratch.

  2. Add an item

    The ones that usually go with it appear right below, so you don't have to search for them or miss any.

More about AI-suggested estimate items

Tile

  • Porcelain floor tile
    Porcelain floor tile$1,050.00
  • Grout and sealant
    Grout and sealant$90.00
  • Leveling underlayment
    Leveling underlayment$187.50
  • Shower wall tile$1,100.00
  • Waterproofing membrane

AI estimate review

How does Obrarum AI check a construction estimate for mistakes?

Obrarum AI reads your estimate and flags each problem on the row where it happens, before your client sees it. You decide what to fix.

What does Obrarum AI review look for?

  • Prices left at zero
  • Negative margins
  • Items that may be duplicates
  • Units that are unusual for the item
  • Items that may belong in another chapter
  • Chapters with no items
  • Margins far below the rest of the estimate

More about AI estimate review

Tile

  • Porcelain floor tile$1,050.00
  • Grout and sealant$0.00

    Price is 0

Tile

  • Porcelain floor tile25%
  • Shower wall tile-5%

    Negative margin (-5%)

1. Plumbing

  • 1.1Install vanity, sink and faucet$1,200.00
  • 1.2Install vanity and faucet$800.00

    Possible duplicate of 1.1 «Install vanity, sink and faucet»

Plumbing

  • Install vanity, sink and faucet1 ea
  • Copper supply line, 1/2 in20 ft²

    ft² is unusual for this item

Tile

  • Porcelain floor tile$1,050.00
  • Install shower valve$225.00

    Might belong in «Plumbing»

Demolition

  • Remove existing flooring$150.00

Electrical

This chapter has no items

Plumbing

  • Install vanity, sink and faucet25%
  • Copper supply line, 1/2 in10%

    Margin 10% is under half the median (25%)

Quote approval with e-signature

How does your client approve a construction quote with Obrarum?

Share a link and your client approves the quote with a signature, from any browser and with no account. You get a certificate of the approval.

  1. Share the link

    Generate the estimate link and send it to your client.

  2. Your client reads the quote

    They see the prices, totals and terms exactly as you sent them, and choose to approve or decline.

  3. They sign

    To approve, your client enters their full name and ID number and draws their signature. You get a clear yes before the job starts.

  4. You get the certificate

    The PDF export includes a certificate with the signer, the date and the device they signed from. It's the record of what they accepted.

More about e-signature for quotes
Dana Whitfield

Hi Dana, here's the quote for your bathroom remodel. You can review and approve it here:

obrarum.com/share/quote/9f2c71ab

obrarum.com/share/quote/9f2c71ab

Total$1,725.00

Terms & Conditions

Approve quoteDecline quote

obrarum.com/share/quote/9f2c71ab

Total$1,725.00Approved and signed

Dana Whitfield

Signed on November 2, 2026

Obrarum House Remodel.pdf

Total$1,725.00

Dana Whitfield

Signed on November 2, 2026

Certificate of Completion

Link Token
Number of signatures
Signature Method
Signed using IP address

What else do you need to estimate a construction job?

Build, control and send your estimate without leaving Obrarum.

All plans

An estimate calculator with a margin only you can see

Build the estimate in chapters and items. You see how much you make on each one, and your client gets the final price.

  • Change an item's margin and its client price updates.
  • Split each item into materials, workforce, equipment and other costs.
  • Add estimate-wide adjustments, like contingency, taxes or discounts.
More about the construction estimate calculator
Obrarum House Remodel

Install vanity, sink and faucet

Material
$720.00
Workforce
$240.00
Internal price
$960.00
Margin
25%
Client price
$1,200.00
Contingency 5%
$86.25
Sales tax 8%
$144.90

Total$1,956.15

All plans

Your unit price library and the Obrarum library

Reuse the items you trust in every estimate.

  • Save your own with the cost breakdown and the prices you already use.
  • Start from a template in the Obrarum library and add your prices.
  • Pick an item from your library when you build your estimates, costs included.
More about the unit price library for estimates
Obrarum House Remodel

Tile

Shower wall til

Your library

  • Shower wall tile, porcelain$11.00
  • Shower wall tile, ceramic$9.50

Obrarum library

  • Ceramic wall tile, 8 × 12 in
  • Glass mosaic wall tile

Pro and Business plans

Always know which version your client has

When your client asks about a price, you find the exact version they have.

  • The version you share locks, so not even you can change it by mistake.
  • If you need to change something, create a new version.
  • The estimate's terms stay as they were the day you shared it.
More about estimate versions
Dana Whitfield

Hi! Is the total still $1,725.00?

Obrarum House Remodel
  • Version 1Rejected$1,845.00
  • Version 2Sent$1,725.00
  • Version 3Draft$1,770.00

Business plan

Internal approval: nothing goes out without your OK

Your team builds the estimate and you check prices and margins before your client sees it.

  • Only admins and owners on your team can approve.
  • If anything changes after approval, a new approval is requested.
  • There's a record of who approved each version and when.
More about internal estimate approval
Obrarum House RemodelPending
ApproveShare estimate

Pro and Business plans

A branded PDF for your client and Excel for you

Your client gets the quote without your margin, and you take the full breakdown into Excel.

  • Put your logo, your color and your terms and conditions on the PDF.
  • Choose what your client sees on the PDF, like quantities, chapter subtotals or taxes.
  • The Excel has the internal price, margin and client price of every item, with formulas.
More about construction estimates in PDF and Excel

Brand color

  • Unit prices
  • Quantities
  • Chapter subtotals

Start free

Is Obrarum built for my market?

Yes. The Obrarum library is different in each market, so you never start a construction estimate from scratch.

  • Latin America

    279

    items in the Obrarum unit price library, in 15 categories

    In Spanish, with metric units.

  • United States

    375

    items in the Obrarum unit price library, in 16 categories

    In English, with imperial units.

Every item is a template with its materials, labor and quantities, ready to use in your estimate.

What does Obrarum cost?

Start free, no card and no expiry date. Move to Pro or Business to add more Obrarum AI features and work with more users.

Free

To try Obrarum on a real job.

Free
  • Included: 1 user included
  • Included: 1 project
  • Included: 1 version per estimate
  • Included: 1 client share link in total
  • Included: Up to 10 items in your library
  • Included: 3 Obrarum AI estimate drafts in total
  • Not included: Obrarum AI suggestions while you build an estimate
  • Not included: Obrarum AI estimate review
  • Included: PDF export (watermarked)
  • Included: Custom terms and conditions
  • Included: Client e-signature and approval certificate
  • Not included: Excel export
  • Not included: Internal approval before sharing with the client
Get started

Pro

Most popular

For contractors, architects and engineers who estimate jobs often.

$59USD / month
  • Included: 3 users included
  • Included: Additional users at $15 USD/month each
  • Included: Unlimited projects
  • Included: Unlimited versions per estimate
  • Included: Unlimited client share links
  • Included: Unlimited items in your library
  • Included: Unlimited Obrarum AI estimate drafts
  • Included: Obrarum AI suggestions while you build an estimate
  • Included: Obrarum AI estimate review
  • Included: PDF export with your logo, colors and fonts, no watermark
  • Included: Custom terms and conditions
  • Included: Excel export
  • Included: Client e-signature and approval certificate
  • Not included: Internal approval before sharing with the client
Get started

Business

For companies that estimate as a team.

$179USD / month
  • Everything in Pro, plus:
  • Included: 8 users included
  • Included: Additional users at $12 USD/month each
  • Included: Internal approval before sharing with the client
Get started

Compare all plans

Questions about Obrarum

What is Obrarum and who is it for?

Obrarum is construction estimating software for contractors, architects and engineers who work on their own or in small teams. You build the estimate with chapters, items and cost components, check it with Obrarum AI and send your client a link to approve and sign the quote.

Does Obrarum AI make up prices?

No. Obrarum AI never sets a price: it proposes items from your library and the Obrarum library, and you decide what goes into the estimate. Obrarum library items are templates with materials, labor and quantities; the costs and margins are yours.

Is it hard to learn?

No. Obrarum runs in your browser, with nothing to install. Describe the job in your own words, Obrarum AI drafts the estimate and you adjust whatever you need.

Does my client need an account to approve a quote?

No. Your client opens the link in their browser, with no account. To approve the quote, Obrarum asks for their full name, ID number and signature. You get a certificate of the approval.

Can my client see my internal prices?

No. Your client only sees the final prices, on the link and on the PDF. Your internal prices and margins are for your eyes only. You choose what else the PDF shows, like quantities or chapter subtotals.

What currency do I pay my subscription in?

You pay in your local currency if you're in the US, Mexico, Peru, Colombia, Chile, Canada or a European country that uses the euro. Everywhere else, you pay in US dollars. The site shows you the price in the currency you'll pay in, based on the country you're visiting from.

What if my client asks for changes?

In Obrarum you create a new version of the estimate with everything from the last one, change only what your client asked for and share it with them. The version you already sent stays locked as it was, so you know which quote your client has and which one they approved.

Start every job with a checked, signed estimate

Build your construction estimate from your library and the Obrarum library, let Obrarum AI check it before you send it and get your client's signature. Your costs and your margin are for your eyes only.

Start free

No credit card • Free forever • Nothing to install