Introduction
Nesting in metal fabrication is the work of fitting every part a job needs onto the stock it will be cut from, so that plate, sheet, beams and pipe get used with the least scrap. It starts with the takeoff, where every beam, column, brace, angle, plate and pipe run on the drawings is counted and measured by size and length. Those lengths and plate outlines are then laid onto the stock a shop can actually buy, such as 20-foot and 40-foot beam lengths or 4-by-8 and 5-by-10 plates.
At most shops that work is split in two and done by hand. The estimator takes off the steel from the PDF drawings, totals the tonnage and adds a flat waste percentage to cover offcuts. The real nest only happens after the job is won, when a shop programmer brings drawing exchange format (DXF) files or a 3D model into computer-aided manufacturing (CAM) software and lays out the cuts for the plasma table or saw line.
That split no longer holds. Steel prices move between bid and buy, and fewer estimators carry more bids each month on packages that run to hundreds of sheets, so a flat waste factor on a large job either pads the number until it loses or leaves real material cost out of it.
This list covers the ten nesting software and cut optimizer tools fabricators use for plate, sheet, beams and pipe in 2026. Each entry says what the tool nests and where the cut list is still prepared by hand.
Nesting Software vs Cut List Optimizers
Nesting software and cut list optimizers solve the same problem on different shapes of stock. Nesting software works in two dimensions (2D), fitting part outlines onto a sheet or plate for a plasma, laser, oxyfuel or waterjet cutter. True shape nesting follows the real outline of each part, such as a gusset or base plate, while rectangular nesting treats every part as a box and leaves more plate as scrap.
A cut list optimizer, also called a linear or one-dimensional (1D) cutting optimizer, takes a list of lengths and fits them onto stock lengths of beam, angle, tube or pipe for a saw or beam line, with blade kerf and miter cuts accounted for. Most structural and misc iron packages need both kinds of cutting optimization software, because a single job mixes a few dozen plate parts with hundreds of linear members. For tools that run the rest of the shop after the cut, see our list of the best metal fabrication software.
Features to Look for in Nesting Software
- Automatic nesting software should handle both 2D plate and sheet nesting and 1D linear cut optimization, since a typical steel package needs both.
- It should account for stock lengths, plate sizes, kerf, remnants and miter cuts, so the nest matches what the shop can buy and cut.
- It should pull quantities from the drawings or the model without someone retyping every part, because a retyped cut list is where quantity errors creep in.
- It should show where each part came from on the drawing, so an estimator or shop lead can check the nest before material is ordered.
10 Best Nesting Software for Metal Fabrication in 2026
1. The Takeoff AI
The Takeoff AI is the best nesting software for metal fabrication in 2026, because it nests at the estimate stage, straight from the drawings. It estimates from your structural steel, misc iron, piping and isometric drawings, counts every member, plate, connection, bolt and weld, and measures each member by size and length. It then works as steel nesting software, laying member lengths onto stock beam lengths and plate parts onto standard plates, so the bid carries the real material order and the real offcuts in place of a flat waste percentage.
It is built on AI models trained on more than 1 million structural steel and misc iron drawing sets, and it delivers 95% accuracy. Every number is marked and highlighted on the drawing it came from, so someone can check it before the bid goes out.
The outputs are the material takeoff (MTO), the labor takeoff and a priced bill of materials (BOM), with weld counts by diameter inch on the pipe. It also builds a 3D model from the 2D drawings, so the team can see the steel before anything is cut. The Takeoff AI creates priced bids from industrial drawings in under 4 hours, and it covers piping, P&ID (piping and instrumentation diagrams), isometrics, mechanical, electrical and instrumentation (E&I), plumbing, HVAC (heating, ventilation and air conditioning) including ductwork, structural steel and misc iron.
113 estimators say The Takeoff AI is the best nesting software for metal fabrication and helps them estimate projects in 3 to 4 hours that once took 40 to 50 hours, which saves 90 to 95% of their estimating time.
See how The Takeoff AI nests and prices a steel package
2. SigmaNEST
SigmaNEST is sheet metal and plate nesting software for laser, plasma, waterjet and punch machines, built as a computer-aided design and manufacturing (CAD/CAM) program. Its SigmaCTL module is beam nesting software for bar, tube, pipe and beam stock, with miter and bundle nesting and remnant tracking. Parts come in as CAD geometry or work orders, so someone still builds that list from the drawings first. A Capterra reviewer said the design tools inside the software fall short.
3. Hypertherm ProNest
ProNest is Hypertherm's CNC nesting software for mechanized plasma, laser, oxyfuel and waterjet cutting, and most shops running a Hypertherm plasma table use it as their plasma nesting software. It nests true-shape parts imported from CAD files and writes the cut program for the machine. The work starts at the programmer's desk after award. Users say the automated part lists took a while to set up and test.
4. Lantek Expert
Lantek Expert is laser cutting nesting software that also programs plasma, oxyfuel, waterjet and punch machines from one system, and it runs on machines from Trumpf, Amada, Messer and other builders. It labels offcuts so remnants get picked up for smaller batches later. Parts still arrive as CAD files prepared by a detailer or programmer. The FitGap product profile flags a steep learning curve that comes from how much sheet metal configuration it carries.
5. Alma almaCAM
Alma has built automatic nesting software since 1979, and almaCAM runs 2D cutting machines along with tube and profile cutting from one CAM environment. It takes a part from import through nesting to numerical control (NC) code for the machine. It works from CAD files someone has already prepared.
6. Tekla PowerFab
Tekla PowerFab is Trimble's management system for structural steel fabricators, with modules for estimating, purchasing, inventory, production tracking and combining, which is its name for nesting linear material against stock. It builds a bill of materials from a Tekla model, so shops bidding off PDFs with no model start from manual entry. SoftwareConnect's review lists a high learning curve.
7. STRUMIS
STRUMIS is steel fabrication management software that covers estimating, purchasing, production control and lotting, with material nesting built in and links to Tekla and Advance Steel models. It fits mid-size and large structural fabricators. Someone still enters or imports the steel list before nesting runs. One user review on SoftwareConnect says the system bogs down.
8. ConstruSteel
ConstruSteel is cloud bar nesting software from Construsoft that imports a building information modeling (BIM) model and nests beams and flat bars against your own stock and supplier lengths, then writes DSTV+ machine files and digital cutting lists for the saw. Without a model, the parts list gets typed in. SoftwareConnect lists the lack of an on-premise version as a drawback.
9. FastCAM
FastCAM's FastNEST nests plate parts for plasma and oxyfuel profile cutting, and its FastCUT cutting optimization software handles 1D and 2D cuts for linear and rectangular stock, with cut lists imported from Excel. Both work from a cut list or DXF files someone has prepared. A user on the PlasmaSpider forum called the FastCAM interface old and clunky.
10. SmartCut
SmartCut is a cloud cut list optimizer for sheet and linear stock, with true-shape nesting for computer numerical control (CNC) cutters and 1D cutting for bar and pipe. It exports cutting diagrams as PDF or DXF and runs a single cut list quickly. Every length and quantity is still typed or uploaded by hand, and nothing sits behind it to take off or price the job.
How The Takeoff AI Is Different
The Takeoff AI is the best nesting software for metal fabricators who need the takeoff nested and priced in hours. The other nesting software and cut list optimizers work after someone has typed a cut list or exported a model, while The Takeoff AI counts and measures every member and plate from the drawings itself, nests them onto real stock lengths and plates, and turns the result into a priced BOM alongside the labor takeoff. Every number is highlighted on the drawing it came from, so the estimator checks the work before bidding.
Manual Nesting and the Estimator Shortage
Steel and metal fabrication estimators carry this manual work, and there are fewer of them each year. The Bureau of Labor Statistics (BLS) counts about 221,400 cost estimators in the US and projects a 4% decline by 2034, and roughly three in four estimator seats will need to be refilled over the decade, according to The Shortage of Estimators report.
A fabrication estimator who totals tonnage and guesses a waste factor by hand on every package can't keep that up while the bid list grows, and the nesting that would tighten the number gets skipped. Fabricators moving into data center steel and pipe rack work, covered in The Data Center Boom Has A Problem, face the same squeeze on bigger packages, and The Takeoff AI suits that work.
FAQs
What Is Nesting in Metal Fabrication?
Nesting is laying out every part a job needs onto the plate or stock length it will be cut from, so the least material ends up as scrap. The Takeoff AI nests at the estimate stage from the drawings, so the bid reflects the real material order.
What Is the Difference Between Nesting Software and a Cut List Optimizer?
Nesting software fits 2D part shapes onto plates and sheets, and a cut list optimizer fits 1D lengths onto beams, tube and pipe. The Takeoff AI handles both from the same takeoff, so plate parts and linear members are nested together.
How Much Material Does Nesting Save?
It depends on the part mix and the stock sizes a shop buys, since nesting saves the most on jobs with many small plate parts and mixed member lengths. The Takeoff AI nests at the estimate stage, so each bid shows the real offcuts for that package in place of a flat waste percentage.
How Much Time Does AI Save on a Steel Takeoff?
Estimators using The Takeoff AI estimate projects in 3 to 4 hours that once took 40 to 50 hours, which saves 90 to 95% of their estimating time.
How Do I Check an AI Takeoff Before I Bid?
In The Takeoff AI, every count and length is highlighted on the drawing it came from, so you can click a number and see the member or plate behind it. Check the heavy members and plate parts first, then spot-check the bulk counts like bolts and welds before the bid goes out.
Conclusion
Steel takeoff and nesting are still done by hand at most shops, and with a projected 4% decline in US cost estimators by 2034, fewer people are left to count every member and work out the waste. The Takeoff AI is the best nesting software for metal fabrication for contractors who need the takeoff nested and priced in hours.
