Comparison
PreCal-IQ vs. Beam AI (Attentive.ai)
Beam AI and PreCal-IQ look similar from a distance — both call themselves AI takeoff — but the delivery models are different. Beam AI runs as a managed service: contractors upload their plans and specs, Beam AI's engine extracts quantities, and a human QA team reviews the result before sending it back as an Excel file in 24–72 hours. PreCal-IQ is a self-serve platform: the AI generates the takeoff live, the estimator reviews and edits in-app, and the file stays under the team's control with no service-desk turnaround.
Bottom line
Beam AI (Attentive.ai) is an AI-plus-human-QA takeoff service that returns Excel-ready quantities in 24–72 hours across 15+ trades, with HVAC and mechanical as its strongest verticals. PreCal-IQ is a self-serve, AI-first preconstruction platform: the takeoff generates in minutes from your spec + plans upload, and your team owns the file from there.
Feature comparison
Side-by-side
| Feature | PreCal-IQ | Beam AI |
|---|---|---|
| Delivery model | Self-serve platform — AI generates in-app, estimator reviews | Managed service — AI extracts, human QA reviews, returned as Excel |
| Turnaround | 15–30 minutes, fully in your control | 24–72 hours from upload to delivered file |
| CSI spec book parsing | Full — every line item from every section | Reads plans and specifications; legends, notes, and schedules |
| Trade coverage | All 45 CSI categories from one upload | 15+ trades; HVAC and mechanical strongest |
| Spec ↔ plan cross-reference | Every item tied to spec section AND drawing location | Not positioned as a core feature |
| Vendor pricing portal | Built-in — vendors price the takeoff directly | Not standard |
| Bid builder + Excel export | Yes — bid PDFs + structured Excel, edited in-app | Excel-ready estimate file aligned to your internal format |
| Starting price | $499 / mo (Starter plan) | Pricing on request |
In practice
How each holds up under real workflow
A mechanical sub with peak bid weeks that overflow internal estimator capacity
Beam AI is a strong fit — the managed-service model lets a small estimating team double or triple bid volume without hiring, and the 24-72hr turnaround is fast enough for most bid calendars. PreCal-IQ also handles HVAC takeoff, but the value of self-serve over managed-service depends on whether you want the file in 30 minutes or are happy with 24-72 hours.
A GC bidding a $40M hospital interior with 600 pages of spec book
Beam AI's 15+ trade coverage is real, but the cross-reference between spec sections and plan elements (hardware groups, finish schedules, fire-rated assemblies, allowances) isn't the core of what they sell. PreCal-IQ extracts that scope automatically and surfaces every spec-defined line item with its source section.
A team that wants to own the takeoff workflow end-to-end
Beam AI returns a finished Excel file — great for teams who want to consume a deliverable, not run a tool. PreCal-IQ is built for teams who want the takeoff to live in their workflow: editable in-app, regenerable on spec change, with vendor pricing flowing back into the same record. Different value, different buyer.
FAQ
Common questions
Is Beam AI a software product or a service?
Both, structured as a managed delivery: their AI engine does the extraction work, then a human QA team reviews each takeoff before sending the Excel file back to the customer. Most customers interact with the deliverable (the file), not the tool directly. PreCal-IQ is a self-serve platform — your team uses the tool live.
Is Beam AI the same as STACK?
No. Beam AI is operated by Attentive.ai (ibeam.ai). STACK is a separate platform from STACK Construction Technologies. Some users compare them because both target the AI-takeoff market, but they're different companies with different delivery models.
When is Beam AI the better choice?
When your team wants to outsource the takeoff work — pay for a deliverable, not learn a tool — and 24-72 hour turnaround fits your bid calendar. Specialty subcontractors with bid-volume peaks they can't staff for are the strongest fit; Beam AI's "junior estimator on demand" framing is a real value.
How does the 24-72hr turnaround compare to PreCal-IQ's 15-30 minutes?
They're measuring different things. Beam AI's 24-72hr is end-to-end including human QA review, so the file you get is quality-checked before delivery. PreCal-IQ's 15-30 minutes is the AI extraction step alone — your team owns the review and any corrections in-app, in real time.
See PreCal-IQ side-by-side with Beam AI
Bring your own spec set to a 30-minute demo. See the takeoff generated live on your project.