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Building bid packages used to take GH Pastor more than two hours per project; with Downtobid it takes 15 minutes, and the contractor now gets 3.8 bids per package instead of 1.9, according to Downtobid’s case study. That is the pitch in one line: let AI read the plan set, split it into trades and send the invitations, so estimators spend their time on numbers rather than on email.

Downtobid suits commercial general contractors who bid out a lot of work and want more subcontractor coverage. Plans start at $149 a month, subcontractors bid free, and Capterra reviewers rate it 4.7 out of 5. Points to weigh are its scope (it focuses on bid management) and the limited public detail on integrations and security, which Downtobid could expand. We rate it 8.4/10 on our scale. We have not used Downtobid ourselves; this review is based on Downtobid’s website, its published case studies and Capterra reviews.

Case Study and Review Figures From a Small Preconstruction Vendor

Downtobid is a small company, so most of the hard numbers come from its own case studies and its review profile. These are the figures we could confirm.

The GH Pastor numbers matter more than the time savings. Doubling the bids received per trade package is what lowers a general contractor’s price and risk, because thin coverage on a trade often means a high number or a hole in the bid. Fifteen hours a week saved across 24 active projects is meaningful for a small estimating team, but more bids per package is what wins work.

The 30% average increase in response rates is the company’s own claim, and the 60,000-bid research base explains where the sub-matching comes from. The review base is small but strong, with a perfect customer service score that fits a young company still close to its users.

From Incoming Plan Set to Returned Subcontractor Bids

Downtobid covers the bidding stage of preconstruction, from the moment a plan set arrives to the point where bids come back.

Reading the Plan Set

An estimator uploads a PDF plan set. Downtobid reads every sheet, identifies the trade packages and drafts scope notes for each. Scope items such as demolition or ductwork clearing are linked to the sheet they came from, so the estimator can check the AI’s reading rather than trust it blindly. Downtobid says it is still adding annotations to plans to help language models read blueprints better, so plan understanding is improving rather than finished.

Finding Subcontractors

The platform suggests local commercial subcontractors from its own database, which it keeps clean by removing inactive firms, verifying activity through direct outreach, categorizing trades with AI and cross-checking data against Google Maps and local trade associations. Contractors can import their existing sub lists by CSV; Downtobid matches them against its database, fills gaps and flags duplicates.

Sending Invitations

Invitations go from the contractor’s own email address with each sub’s scope, notes, relevant sheets and company branding. Subs can reply to the email directly instead of clicking yes, no or maybe buttons. Timed reminders follow up, and responses sort into not bidding, interested and actively bidding. A coverage view shows who opened the invite, who is bidding and who needs a call.

The Planroom

Files sync so everyone works from the latest set, grouped into plans, specs, photos and miscellaneous, with pages indexed and numbered. Subcontractors can view plans free without creating an account, and the contractor can see who viewed which plans and for how long, a useful signal of who is serious about bidding.

What Stays With the Estimator

Users review and edit packages, scopes and invitations before anything is sent. Downtobid describes the tool as an aid to estimators, not a replacement for their judgment. Leveling bids, picking subs and pricing the job remain human work.

For Subcontractors

Subcontractors get a separate set of tools: a single board for invitations, deadlines and RFIs, a shared calendar, estimator assignment to stop two people bidding the same job, and a way to find commercial general contractors. Capterra reviewers single out the way it pulls invitations out of email into one organized view.

What to Measure on a Live Bid

Downtobid’s own case studies measure a handful of things, and a contractor can track the same ones on a trial project to see whether the tool earns its subscription.

• Package prep time: how long it takes from receiving the plan set to having every trade package ready to send, compared with your last few bids.
• Scope accuracy: how many AI-drafted scope notes your estimator had to rewrite, and whether any trade was missed or merged by mistake.
• Coverage: bids received per trade package, the measure that rose from 1.9 to 3.8 at GH Pastor.
• Response rate: the share of invited subs who opened, replied and bid, which Downtobid says rises 30% on average.
• New subs: how many bids came from subcontractors suggested by Downtobid rather than from your own list.

Pick a project of normal size and complexity, not the easiest job on the board. A bid with a dozen or more trades is where plan reading and tracking save the most time, and where gaps in coverage are most costly.

Published Rates Starting at $149 a Month per Organization

Downtobid publishes its starting prices, which is unusual among AI construction tools.

An Entry-Plan General Contractor’s $1,788 Year

These scenarios use Downtobid’s published prices. The hourly cost of an estimator is our own assumption for illustration.

• A general contractor on the entry plan: $149 a month comes to $1,788 a year before additional users.
• A subcontractor choosing between plans: the leads plan costs $1,428 a year; full bid management costs $3,588 a year.
• Time value at GH Pastor’s savings: 15 hours a week at an assumed $60 an hour for estimator time is $900 a week, or about $45,000 over a 50-week year, far above the subscription cost.

The variable to watch is users. General contractor pricing is per user, so a firm with several estimators should get a quote for its whole team. Contractors moving from another platform should also budget time to clean up their sub list on import, even though Downtobid says migration takes under an hour.

Downtobid Compared With Togal.AI, Procore Agents and Trunk Tools

Construction AI tools tend to cover one stage of a project. Downtobid sits at bidding, Togal.AI at takeoff, and Procore Agents and Trunk Tools mostly during the build.

These tools complement more than compete. A general contractor could use Togal.AI for takeoff, Downtobid to get sub bids and Procore Agents once the job starts. Downtobid positions itself as an alternative to bid platforms such as BuildingConnected, PlanHub and SmartBid, so contractors already paying for one of those should compare it on plan reading, sub matching and coverage tracking rather than on price alone. Contractors comparing more options can browse AI agents for construction, including Document Crunch for contract review.

Commercial GCs Short on Subcontractor Coverage

• Commercial general contractors with thin sub coverage: the GH Pastor case study shows bids per package doubling.
• Small estimating teams buried in invitations: plan reading and scope drafting cut hours of prep per project.
• Contractors moving off a legacy bid platform: CSV import and a migration the company says takes under an hour lower switching costs.
• Subcontractors juggling many invitations: the bid board pulls invites, deadlines and RFIs into one place.
• Firms that want a published price: starting prices are on the website, unlike most AI construction tools.

Residential Builders and Anyone Needing Takeoff

• Residential builders and remodelers: the subcontractor database and messaging focus on commercial work.
• Contractors who need takeoff or estimating: Downtobid drafts scopes and invitations but does not measure quantities or price the job.
• Firms that need deep integrations: the site names no links to project management or estimating systems beyond email and CSV.
• Very small firms on tight budgets: Capterra reviewers say the price feels high for smaller companies.

Blueprint Reading Still Being Refined and Self-Reported Gains

• AI plan reading: Downtobid says it is still improving how language models read blueprints, so check every package and scope before sending.
• Company figures: response-rate gains and the 60,000-bid research base are Downtobid’s own numbers.
• Per-user pricing: the $149 starting price grows with each estimator added.
• Plan viewing: reviewers say navigating plans is less smooth than in dedicated viewers such as Bluebeam, and revisions can be awkward to manage.
• Security detail: the website does not list security certifications, so ask how plan sets and sub data are stored before uploading confidential projects.
• Small review base: the 4.7 Capterra rating comes from 23 reviews, and many describe the subcontractor bid board rather than the general contractor AI.

Easy to Justify for GCs Who Bid Out a Lot of Work

For commercial general contractors who bid out a lot of work, Downtobid is easy to justify. It scores 8.4/10 on our scale: strong on ease of setup, pricing and user sentiment, with room to grow on integrations and published security detail. The GH Pastor case study, with bids per package doubling from 1.9 to 3.8, shows the result that matters most, and a $149 starting price puts it within reach of small estimating teams.

Use the free trial on a live bid. Upload a real plan set, compare the AI’s trade packages with what your estimator would have built, and count bids per package against your last few projects. If coverage improves and the scopes need only light editing, the subscription pays for itself quickly. If you need takeoff or deep software integrations, pair it with other tools that cover those jobs.

Subcontractor Access, Drawing Reading and Togal.AI Comparisons

How Much Does Downtobid Cost?

General contractor plans start at $149 a month per organization, priced per user. Subcontractors pay $119 a month for the Bid Board leads plan or $299 a month for full bid management.

Is Downtobid Free for Subcontractors?

Invited subcontractors can view planrooms and submit bids free, without an account to view plans. Paid subcontractor plans add a bid board, calendar, estimator assignment and leads.

Does Downtobid Read Construction Drawings?

Yes. It reads every sheet of a PDF plan set, identifies trade packages and drafts scope notes linked to the source sheet. Downtobid says plan understanding is still improving, so estimators should review scopes before sending.

How Does Downtobid Compare With Togal.AI?

They cover different steps. Togal.AI does AI takeoff from $299 per user a month billed yearly, while Downtobid builds bid packages and gets subcontractor bids from $149 a month. Many estimators could use both.

Does Downtobid Send Invitations Automatically?

It prepares personalized invitations and sends them from your own email, with timed reminders afterward. Users review and edit packages and invitations before anything goes out.