SPEC Toolbox

What SPEC Toolbox does

SPEC Toolbox (formerly CLT Toolbox) is a Melbourne-headquartered construction technology company that provides a cloud-based SaaS platform automating structural engineering calculations for mass timber and modern sustainable building materials. The platform embeds international building standards (AS1720 for Australia/New Zealand, Eurocode 5 for Europe, CSA O86 for Canada, and NDS for the United States) and integrates catalogs from 35+ verified timber product suppliers, enabling structural engineers to design cross-laminated timber (CLT), glulam (GLT), dowel/screw/bracket connections, light-frame, ribbed deck, timber-concrete composite (TCC) floors, acoustics, shear walls, and fire-rated assemblies within a single verified workflow. Founded in 2022 by structural engineers Adam Jones and Ringo Thomas, the company operates distributed development teams across Melbourne, Addis Ababa (Ethiopia), and Java (Indonesia), and serves markets in Australia, New Zealand, Europe, the UK, the United States, and Canada.

The product is modular and distributed via a freemium SaaS model: a free tier provides basic calculators and limited supply-chain access, a Pro tier is priced at A$2,500 per license per year (or A$750 quarterly), and an Enterprise tier offers unlimited licenses, advanced user management, and dedicated onboarding. Go-to-market combines product-led growth (self-serve sign-up via app.spectoolbox.com) with a sales-led Enterprise motion featuring "Book a Demo" and "Contact Us" calls to action. Marketing is content-driven through technical blog articles, live webinars, a community forum on Circle.so, YouTube product release videos, and partner testimonials. The company has accumulated over 6,000 user signups and 35+ integrated suppliers across its four regional markets, and has raised approximately A$5.5 million in disclosed funding, including a A$1.5M seed round in 2023 led by Archangel Ventures and a A$3M Pre-Series A round in January 2026 co-led by Black Nova and Investible.

Name

SPEC Toolbox

Legal name

SPEC Toolbox

Website

https://clttoolbox.com.au

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

11–50 employees

Short description

SPEC Toolbox is a Melbourne-based construction technology SaaS that automates structural engineering calculations for mass timber buildings. Its cloud platform integrates international building standards and 35+ manufacturer catalogs, serving structural engineers across Australia, New Zealand, Europe, the UK, and North America.

Ownership category

akta.pro rank

Headquarters

HQ city

Melbourne

HQ country

Australia

HQ region

Oceania

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Software Subscription (Pro & Enterprise): SaaS subscription model with Free tier (basic features), Pro tier at $2,500 AUD/year or $750 AUD/quarter, and Enterprise tier with unlimited licenses and advanced support. Revenue from license subscriptions to structural engineering software platform.
2. Freemium / Free Tier: Free tier provides basic CLT, basic GLT, core screw calculation, hangers design, and access to free-tier supply chain partners. Serves as acquisition funnel for Pro and Enterprise conversions.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

SPEC Toolbox provides a cloud-based SaaS platform that automates structural engineering calculations for mass timber and modern construction materials, integrating built-in international building standards (AS1720, Eurocode 5, CSA O86, NDS) with manufacturer product catalogs from 35+ suppliers. The platform turns days of manual structural calculation into minutes of automated analysis, supporting calculators for CLT, GLT, screws, dowels, brackets, light-frame, ribbed decks, timber-concrete composites, acoustics, shear walls, and fire design.

Product overview

SPEC Toolbox (formerly CLT Toolbox) is a construction technology platform providing cloud-based structural timber design software for engineers. The platform offers a modular portfolio centered on its core design engine, which integrates built-in international building standards (AS1720, Eurocode 5, CSA O86, NDS) with manufacturer product catalogs. The product suite includes dedicated calculator modules for CLT (Cross-Laminated Timber), GLT (Glulam), dowel/bolt connections, timber screws, brackets, light-frame construction, ribbed deck design, timber-concrete composite (TCC) floors, acoustic design, and shear wall analysis. The platform bridges the supplier-designer gap by integrating over 35 product supplier catalogs directly into calculations. Access is tiered: Free (basic calculators with limited supply chain), Pro ($2,500 AUD/year for full-feature access with advanced modules and pro-tier suppliers), and Enterprise (unlimited licenses with dedicated support). The company expanded from its original CLT focus to eight product categories following a 2024 rebrand, and now serves markets in Australia/New Zealand, Europe, North America, and Canada.

Differentiator

Problem solved

Functional benefit

Products and services

• SPEC Toolbox Platform Cloud-based structural timber design platform combining built-in international standards (AS1720, Eurocode 5, CSA O86, NDS) with manufacturer product catalogs to automate engineering calculations for mass timber and modern construction materials.

Quantifiable outcome

• Turns days of manual crunching into minutes of automated structural analysis
• +2 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

33 partnerships are on record, tiered core.

• Hyne TimbercoreTechnology or IntegrationMajor Australian timber manufacturer integrated into SPEC Toolbox supply chain. Featured prominently in partner section with logo and dedicated partner page. Hyne provides structural timber products catalogued in the platform.
• BinderholzcoreTechnology or IntegrationEuropean mass timber manufacturer integrated into the platform's supply chain. Featured supplier with logo and dedicated partner page listing products in the design tool.
• RothoblaascoreTechnology or IntegrationFastening and structural hardware manufacturer integrated as a supplier partner. Products include fasteners, screws, and brackets available within the design platform.
• Simpson Strong-TiecoreTechnology or IntegrationGlobal leader in structural hardware integrated into the platform. Provides connection hardware specifications for timber design calculations.
• WürthcoreTechnology or IntegrationFastening systems manufacturer integrated as a supplier partner. Products listed within the timber design calculation tools.
• KLH SuppliercoreTechnology or IntegrationKLH (KLH Massivholz) European CLT manufacturer integrated as a supply chain partner on the platform.
• XLAMcoreTechnology or IntegrationAustralian CLT manufacturer integrated as a supply chain partner. Featured in partner section with logo and dedicated partner page.
• AnzorcoreTechnology or IntegrationAustralian timber hardware supplier integrated into the platform. Featured supplier partner with dedicated listing.
• EuroteccoreTechnology or IntegrationEuropean timber construction hardware supplier. Testimonial featured on website: 'Creating solutions that improve the wood construction industry is one of the core goals Eurotec and SPEC Toolbox have in common.'
• Timber Unlimited NZcoreTechnology or IntegrationNew Zealand timber supplier partnership including free advanced timber design software access for engineers in New Zealand. Partnered to launch free design tools for NZ engineers.
• Batten & CradlecoreTechnology or IntegrationFlooring systems manufacturer and supplier partner integrated into the platform. Featured supplier with logo displayed on homepage.
• Red StagcoreTechnology or IntegrationNew Zealand mass timber manufacturer integrated into the supply chain. Products available within the design platform.
• ProlamcoreTechnology or IntegrationAustralian glulam and structural timber manufacturer partner. Products integrated into design calculations.
• ASHcoreTechnology or IntegrationTimber hardware and accessories supplier integrated into the platform's supply chain catalog.
• KlimascoreTechnology or IntegrationEuropean timber connection hardware supplier integrated into the platform. Products available in design tools.
• NeXTimbercoreTechnology or IntegrationAustralian mass timber and engineered wood product supplier integrated as a partner.
• PitzlcoreTechnology or IntegrationTimber connection hardware manufacturer integrated as a supplier partner.
• SPAXcoreTechnology or IntegrationFastener manufacturer with products integrated into the timber design platform.
• SIHGAcoreTechnology or IntegrationTimber hardware and fixings supplier integrated into the platform's product catalog.
• Schmid Schrauben HainfeldcoreTechnology or IntegrationAustrian screw and fastener manufacturer integrated into the platform.
• MercercoreTechnology or IntegrationTimber supplier partner featured on the Canada region of the platform.
• Nordic StructurescoreTechnology or IntegrationNordic timber structures supplier partner listed in the Canada region.
• FrerescoreTechnology or IntegrationUS mass timber manufacturer integrated into the European/US region of the platform.
• SmartlamcoreTechnology or IntegrationUS-based mass timber manufacturer and partner on the platform.
• SterlingcoreTechnology or IntegrationStructural timber products supplier integrated into the platform.
• Bi-MirthcoreTechnology or IntegrationTimber hardware supplier partner listed in Canada and US regions.
• ESSVEcoreTechnology or IntegrationFastening solutions supplier partner on the platform.
• KalvastacoreTechnology or IntegrationTimber connection hardware supplier partner in the Canada region.
• MTTcoreTechnology or IntegrationMass timber technology supplier partner listed in Canada region.
• RocketcoreTechnology or IntegrationTimber hardware supplier partner in Canada region.
• SodracoreTechnology or IntegrationSwedish timber and forest products supplier partner.
• THEURLcoreTechnology or IntegrationTimber construction hardware supplier partner.
• XLAM DolomiticoreTechnology or IntegrationItalian CLT manufacturer and supplier partner integrated into the platform.

Scale indicators6 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• SCIA Engineer (Nemetschek Group): SCIA Engineer is a multi-material structural analysis software with timber modules included in the broader Nemetschek AEC portfolio. Overlaps with SPEC Toolbox on structural engineering calculations but competes as part of a much larger AEC software suite (Graphisoft, Vectorworks, Bluebeam).
• Computers & Structures (SAP2000 / ETABS): SAP2000 and ETABS are industry-standard structural analysis suites used by virtually every structural engineering firm. While not timber-specialized, they are the incumbent tools SPEC Toolbox must displace or integrate with; their broad scope and deep BIM integrations make them the dominant alternative for practicing structural engineers.
• Tekla Structures (Trimble): Tekla Structures is a leading structural BIM platform with timber detailing capabilities and deep integration into Trimble's construction ecosystem. Competes with SPEC Toolbox for engineering and detailing workflows in mass timber projects, with much broader scope and an established enterprise install base.
• RISA Technologies: RISA produces 3D structural analysis software (RISA-3D, RISAFloor) widely used in US engineering firms for steel, concrete, and timber design. Comparable to SPEC Toolbox as a structural engineering calculation tool, with a much broader material scope but less mass timber specialization and no supplier integration.

Direct peers

• Dlubal Software (RFEM): Dlubal's RFEM is a 3D structural analysis software with dedicated timber design modules (including CLT/GLT) per Eurocode, AS/NZS, and NDS. Directly competes with SPEC Toolbox for structural engineers designing mass timber buildings, with a broader scope (steel, concrete, membranes) but less supplier integration.
• Cadwork: Cadwork is a specialist timber construction CAD/CAM platform widely used in European CLT/glulam manufacturing and engineering. Comparable to SPEC Toolbox in its deep timber specialization, but oriented upstream toward manufacturing/joineries rather than engineer-facing specification.
• Dietrich's: Dietrich's is a long-established timber engineering and frame construction CAD software serving European manufacturers and engineers. Comparable to SPEC Toolbox for timber-framed and mass timber design, with stronger manufacturing-shop focus and weaker end-engineer specification workflow.
• S-FRAME Software: S-FRAME delivers structural analysis software with timber design capabilities and code-checking modules. Overlaps with SPEC Toolbox on engineer-facing structural calculations across multiple materials, though S-FRAME is more general-purpose and less supplier-integrated.
• IDEA StatiCa: IDEA StatiCa specializes in structural connection design, with timber connections as a growing module. Highly comparable to SPEC Toolbox's connection modules (dowels, screws, brackets) and competes for the same engineer persona, with a different scope (connections only) but similar cloud-native approach.
• SEMA (SEMA GmbH): SEMA is a specialist timber engineering and stair/railing CAD software with strong penetration in European timber manufacturing. Comparable to SPEC Toolbox in its timber-only focus and engineer/manufacturer audience, but oriented more toward manufacturing output than design specification.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@SPECToolbox
• Facebookfacebook.com/CLTToolbox
• LinkedInlinkedin.com/company/spec-toolbox
• Instagraminstagram.com/spec_toolbox

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds3 records

Investors14 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SPEC Toolbox