Free software is rarely nothing. What a vendor gives away is a decision about which part of the workflow it can afford to lose, and that decision tells you what the paid product actually is.
This page separates the six things "free" means in construction estimating, checks which exist in Australia today, and states the caps exactly as vendors publish them. How an estimate is built is the estimating guide's subject; how plans are measured is the takeoff guide's. This page is about the access model.
Key Takeaways
- "Free" means six different arrangements, and they fail differently: a permanent tier caps your volume, a trial expires on a date, an open-source tool has no vendor, a spreadsheet has no audit trail, a calculator solves one quantity, and a subsidised product withholds whatever the vendor sells.
- Two permanent free tiers were verified in Australia in October 2026, both capping volume rather than features: STACK at one active project and 50 measurements a month; 2estimate at two takeoff plans and three invoices.
- No full-featured Australian estimating product checked offers a permanent free tier. Buildxact, Groundplan, PlanSwift and Bluebeam offer a trial and then a subscription.
- "Free while in beta" is a different promise, and at least one vendor states the future price on its own page.
- Accuracy is bounded by the drawing, not the price. Free and paid tools share the same measurement ceiling.
The Six Things "Free" Means
Telling these apart is most of the decision, because each breaks at a different moment.
A permanent free tier with real limits. Usable indefinitely, capped by volume rather than feature. The most useful form of free and the rarest. It fails when you hit the cap mid-bid, the worst possible time to be shopping.
A free trial that expires. Full features, finite clock, usually seven or fourteen days. It fails on a date rather than a feature, and the clock starts at signup — so one opened in a quiet week is gone before the tender lands.
Free open-source or browser-based takeoff. No vendor, no subscription, no seat licence and, because there is no server, no backup and no second user.
A spreadsheet you build yourself. Free and malleable, owned by whoever built it. Its failure is key-person risk, and the inability to prove a number three months later.
Free calculators and trade-calculator sets. A fuel calculator, a concrete quantity calculator, a free Gantt chart. Each solves one bounded problem completely, which is exactly its limit: none produces an estimate.
Free because the vendor monetises elsewhere. A safety platform giving away a quoting app, a consultancy giving away a takeoff tool. The free part is genuine; the gap is what the vendor sells.
The Permanent Free Tiers, Verified
Only two tools checked offer a permanent free tier with a published cap, and both cap volume rather than features.
| Tool | What is genuinely free | The limit | Cost to move up | Date checked |
|---|---|---|---|---|
| STACK | Free forever after a 7-day Pro preview: plan viewing and markup, core takeoff tools, in-app chat support (pricing) | 1 active project per month, 300 plan pages, 50 measurements per project | US$299 per user/month billed annually | October 2026 |
| 2estimate | Free plan, no card: 1 user, PDF takeoff, GST invoices, limited projects (plans) | 2 takeoff plans per project, 3 GST invoices/month, 1 bank-feed sync/month, 200 MB storage; no AI takeoff, no progress claims, no variations, no retention, no multi-recipient tenders | A$79/mo Professional (5 users); A$119/mo Enterprise | October 2026 |
| eTakeoff Dimension Basic | Free desktop viewer with no time limit — the vendor's training guide states the Basic edition is "available at no cost or time limit" and that you "can complete simple takeoff" with it (training guide) | It is a viewer and printer first; the full takeoff system, pre-defined extensions and assemblies sit in the purchased editions | The vendor's own trial page lists Advanced at US$795 and Premier at US$1,495 (trial page) | October 2026 |
| OpenTakeoff | Apache-2.0 browser canvas: no account, no upload, full measurement tools, CSV/JSON/Excel export (repo) | Work lives in one browser's storage — the docs note it is "per browser, per origin, and clearing site data clears your work" | Nothing to buy | October 2026 |
| Zigplan | Free MIT-licensed desktop app: PDF and image plans, lengths, areas, counts, a local cost database, "No account. No subscription. MIT licensed." (OSS app) | Explicitly "Beta / Early Access"; builds are unsigned | A hosted back office starts at $599/mo | October 2026 |
Read STACK's offer literally: "free forever, after 7 days of Pro" means the permanent tier is what remains after the preview — one project and fifty measurements a month, roughly a single small residential sheet. Then read 2estimate's free column for what is missing rather than present. The absences are the paid product.
The Trials, and How Long They Run
The trial is the most common thing called "free" here, and the shortest-lived. Buildxact, PlanSwift and Bluebeam each run 14 days with no card required — PlanSwift's includes "every feature including Takeoff BOOST" plus a free 1-on-1 overview, and Bluebeam's gives access at its Max tier (Buildxact; PlanSwift; Bluebeam). The Australian vendors run shorter: Groundplan gives 7 days and asks for billing details to continue (pricing), and STACK's 7 days of Pro folds into the free account. All checked October 2026. A trial tests the product, not your problem — it will not tell you whether the tool handles the trades you actually price.
Free while in beta is not the same claim
QS Takeoff's own FAQ reads: "Free while we are in beta... It will not be free forever, and we would rather say so than let you find out later." The same page names an intended post-beta price of no more than £10 a month (QS Takeoff). Zigplan's free desktop app carries the same status. That honesty points to the check worth running on any tool: does the vendor's page name a cap, a future price, or a beta status? If it names none of the three, that absence is the information.
What Free Actually Withholds
The free tools that fail do so for reasons unrelated to their feature lists, and the boundary is consistent enough to state as a rule: a free tier gives you measurement and a document, not supplier pricing, revision control, a second user, an audit trail, or a handover to job costing.
No supplier price file. STACK's free column lists core takeoff tools; the item and assembly library and the regional cost library sit on the paid tier. The measurement is free and the pricing data behind it is not.
No revision control. "Overlay to compare drawing versions" is a paid-column feature at STACK, so on a free tier a revision means re-measuring — nothing shows you what moved.
No multi-user editing. 2estimate's free plan is one user and Professional is five. A second person quoting the same tender is the upgrade.
No audit trail when a dispute needs one. A browser tool with no server keeps no shared history. OpenTakeoff documents the trade plainly: the work lives in one browser, and clearing site data clears it. That is why there is no subscription, and why there is no recovery.
No estimate-to-job-cost handover. 2estimate's free column omits progress claims, variations and retention entirely, so the quote is free and the job that follows is not. Where that handover into construction cost management software begins is a separate decision.
No support with a person on the clock when a bid is due. STACK's free tier includes in-app support; an open-source project has an issue tracker. Only one has someone contractually on the other end.
No fix for the spreadsheet only one person understands. A rate formula edited in 2023 and never documented is the number you cannot reproduce when asked to justify it.
Accuracy is the exception. 2estimate states its own PDF takeoff is "calibration-bound — after you've calibrated against a known dimension, measurements match the drawing to within ±1%... same constraint as a physical scale ruler". Paying does not buy a better drawing.
When to Stop Using Free
Free stops being adequate at a specific volume, not at a feeling. Six triggers:
- You bid more than a couple of jobs a month. STACK's free tier is one active project a month; 2estimate's is two takeoff plans per project.
- You need supplier pricing. A takeoff you cannot price from a current supplier file is half an estimate.
- More than one person quotes. 2estimate's free plan is a single user.
- A claim or dispute needs an audit trail. The number has to trace to a sheet, a revision and a shape.
- A plan revision lands mid-tender, and without a version overlay you re-measure the set.
- You win the job. The estimate has to become a budget and a claim has to go out. That is where every free tier checked stops.
Two free things earn a permanent place. Safe Work Australia publishes an interactive SWMS tool, and WorkSafe Victoria's SWMS template can be completed online or printed (Safe Work Australia; WorkSafe Victoria). Keep those and pay for the estimate.
If You Do Not Want to Buy Software Yet
For some builders the bottleneck is not software at all. It is getting comparable prices in the first place, from a drawing set they already have, and buying a tool first means digitising a process that has not been fixed yet.
Our Adelaide trade-quote desk is the "don't buy software yet" option for that builder: one drawing set in, comparable trade quotes back. It depends on the quantities being clean, but not on you owning the tooling that produces them. Submit a set at get started. Where the software decision does matter is one level up, and the construction management software guide maps the five jobs a builder's systems have to do.
Frequently Asked Questions
Is there really free construction estimating software?
Yes, in six forms, and only two were verified in Australia in October 2026 as permanent free tiers with published caps. The rest are trials, open-source tools, spreadsheets, calculators, or a vendor subsidising one product to sell another.
What is the best free estimating software in Australia?
Answer by need, not ranking. STACK's tier suits occasional measurement at one project a month; 2estimate suits a single user quoting and invoicing a small volume; OpenTakeoff suits a builder who wants genuine takeoff with no vendor.
Is STACK's free plan actually free forever?
Yes. It is published as "Free forever, after 7-days of Pro", capped at one active project per month, 300 plan pages and 50 measurements per project (STACK pricing, checked October 2026).
Does Buildxact have a free version?
No. Buildxact offers a 14-day free trial with no credit card required and access to all features, then a subscription (Buildxact trial, checked October 2026).
Is free takeoff software accurate?
Accuracy is bounded by the drawing rather than the price. 2estimate states its own PDF takeoff matches the drawing to within ±1% once calibrated, and that the real-world limit is the same as a physical scale ruler.
When should I stop using free estimating software?
When the cap, the date or the person becomes the constraint: you bid more than a couple of jobs a month, you need current supplier pricing, a second person quotes, a claim needs an audit trail, or you win the job.
Where This Leaves the Category
Free gets you measurement and a document, and in two cases it gets you that indefinitely. It does not get you supplier pricing, revision control, a second user, an audit trail, or the handover into job costing, and every permanent tier checked draws that line in the same place.
Pay when the cap, the date or the person becomes the constraint, not when you feel you ought to own software.