Catch what the plans miss.Coordinate what the field changes.
OnSpec reviews drawings before bid, ranks what needs to be procured by when, and keeps the right crews in the loop when reality changes the schedule. One platform, preconstruction through jobsite.
No credit card required. 3 free analyses per month.
OnSpec Score
87
Del Valle Public Library
Recent Findings
By Discipline
Trusted by teams at leading construction and design firms
50+
Building codes referenced
6
Disciplines analyzed
95%
Issue detection accuracy
20min
Avg. analysis time
The old way vs. OnSpec
Traditional plan review is slow, error-prone, and expensive. OnSpec replaces weeks of manual checking with intelligent, code-referenced analysis.
Manual Plan Review
- 2-4 weeks for a thorough review across disciplines
- Human reviewers miss 15-30% of coordination conflicts
- Average change order cost: $25,000-$150,000 per issue
- Code references manually looked up and often incomplete
- Findings scattered across emails, redlines, and spreadsheets
OnSpec AI Review
- First-pass analysis complete in under 20 minutes
- 95% accuracy with multi-discipline cross-referencing
- Catch issues at $0 cost vs. $25K+ in the field
- Every finding auto-linked to IBC, NEC, IMC code sections
- Centralized findings with assignment, RFI, and collaboration
One platform, preconstruction through jobsite
From gap detection before bid, to procurement priority, to coordinating crews when the field changes.
Before you break ground
AI Plan Analysis
Upload architectural, structural, and MEP plans. OnSpec reads every sheet, cross-references disciplines, and surfaces coordination gaps in minutes.
Before you break ground
Code Intelligence
Every finding is linked to the specific IBC, IRC, NEC, or local code section. No more searching through code books.
Before you buy
Procurement Priority
Contract items ranked by lead time vs. schedule pressure. Know what needs to be ordered first — before the PO goes out late.
Before you break ground
Version Tracking
Upload new revisions and instantly see what changed. Track which findings were resolved and which ones a revision introduced.
Before you break ground
AI-Filtered Findings
A second AI pass scores each finding on whether it's real, unique, actionable, and severe — and walks the cross-document reference graph to catch the cases where the answer is one callout away. You triage what's likely to matter, not the long tail.
While you build
Field Coordination
Crew directory, daily check-in, and spatial tags on every activity. Know who's working where, today — on the jobsite or from the trailer.
While you build
Change Impact Routing
When a change lands, route affected crews in minutes via push, in-app, and SMS — with a 4-level escalation ladder for un-acknowledged blocking RFIs.
How OnSpec works
From upload to jobsite coordination — one workflow, one source of truth.
Upload plans + schedule
Drag and drop drawings, specs, and your P6 schedule. OnSpec accepts PDFs, DWGs, XER, and PMXML.
AI surfaces risks
Cross-discipline gaps flagged, code-referenced findings generated, and contract items ranked by lead time vs. schedule pressure.
Assign, track, resolve
Route findings to the right team. Generate RFIs, track ball-in-court, and close gaps before bid.
Coordinate the build
Daily crew check-ins, spatial-tagged activities, and change impact routing so the right foremen stop before they rework.
Built for every role on the project
Whether you are building it, designing it, or reviewing it, OnSpec helps you do it better.
Catch errors before they become RFIs and change orders
Review every plan set for conflicts, code violations, and coordination gaps before breaking ground. Reduce RFIs by up to 60% and keep projects on schedule.
60%
fewer RFIs
Code-referenced findings, not guesswork
Every issue links directly to the building code section, complete with the specific requirement and a recommended resolution.
Foundation depth does not meet frost line requirement for Zone 5
Plans indicate footing depth at 30" below grade. Frost line depth for the project jurisdiction (Zone 5, Denver County, CO) requires a minimum of 36" below grade per local amendment to IBC.
IBC 1809.5 — Frost protection. Except where otherwise protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods...
Increase footing depth to minimum 36" below grade. Verify with local building department for any additional amendments. Consider frost-protected shallow foundation (FPSF) as alternative per IBC 1809.5, Method 2.
Trusted by construction professionals
Teams across the AEC industry rely on OnSpec to catch issues early and build better.
“OnSpec caught a structural conflict in our hospital project that would have been a $400K change order. We found it in the plan review phase instead of during steel erection.”
Marcus Rivera
VP of Preconstruction, Landmark Building Group
“We used to spend 3 weeks on manual plan review. OnSpec does the first pass in 20 minutes. Our engineers now focus on the complex issues instead of hunting for missing details.”
Sarah Chen
Director of Engineering, Pacific Design Partners
“The code reference feature alone is worth the subscription. Every finding links directly to the specific IBC or NEC section. No more flipping through code books.”
James Okafor
Senior Project Manager, Atlas Construction
Migrate from. Work with.
OnSpec replaces the platforms you’re paying a tax on today — and complements the genuinely different tools your team loves.
Procore
Workflow & RFIs
PlanGrid
Field drawings
CompanyCam
Field photos
Autodesk
Design tools
Bluebeam
Plan markup
BIM 360
Model coordination
Plans that scale with your projects
GCs and owners pay to catch issues. Architects collaborate free — or pay to pre-check.
Starter
Try before you buy
- 3 analyses per month
- 1 project
- 1 team member
- AI Plan Analysis
- OnSpec Score
- Drawing Areas & Spec Areas
- RFI Generation
- Checklists & Meetings
Pro
Small GCs & project managers
- 25 analyses per month
- 10 projects, 5 team members
- RFIs with Saved Views + Export
- Drawing Areas & Spec Areas
- Checklists (3 templates)
- Meetings & Photos (10 GB)
- Migration imports (Procore, PlanGrid)
- Build Monitor
Team
Mid-size GCs & multi-project teams
- 100 analyses per month
- Unlimited projects, 25 team members
- Everything in Pro, plus:
- Unlimited Inspection Templates
- Submittal Insights dashboard
- Reports Hub + scheduled reports
- Build Monitor (field verification)
- API Access
Business
Large GCs & owners
- 500 analyses per month
- Unlimited everything
- Portfolio Analytics
- Custom Workflows
- Priority Support
- Dedicated Account Manager
- Advanced Reporting
- SSO / SAML (basic)
Enterprise
ENR Top 400 GCs, national owners
- Unlimited analyses, projects, users
- SSO / SAML (full)
- SLA with uptime guarantee
- Custom integrations (Oracle, SAP, CMiC, Primavera)
- Dedicated CSM
- White-label / co-branding
- On-site training & onboarding
Need more analyses? Overages available at $15/analysis · Volume discounts at 50+ and 200+
Invite architects & subs for free
When you share findings with external teams, they get free Collaborator access — view, respond, and discuss at no cost.
Pricing FAQ
Ready to streamline your plan review?
Upload your first plan set for free. See what OnSpec catches in minutes.
No credit card required. Cancel anytime.