Construction

Bolster

Website
Founded 2015Origin source ↗Checked 2026-09-15

Overview

We are building the Amazon for construction where contractors can give their customers an interactive shopping experience, turning the estimate into a point-of-sale, for the first time. It is a marketplace for general contractors, subcontractors, retailers and consumers, powered by a database of over 114,000 real items.

Company description As recorded 2026-11-08
About
ConstructionMarketplaceBusinesses & consumersSmall businessesMarketplace

Founders & team

Previously CostCertified

Company history As recorded 2026-11-08

Mike Bignold

Founder

Mike Bignold is the founder and CEO of CostCertified. He conceived and built CostCertified while running his previous contracting contracting company, with the aim of transforming the construction industry. He dived full-time into CostCertified in 2017, it came out of beta in late 2020, and in 2021 it is expected to have over $200m of construction projects sold through the platform. Born and raised in Canmore, Alberta, he also has a BMgt from University of British Columbia (Okanagan).

LinkedIn
Founder profile As recorded 2026-09-15
25team members reported
Source-reported As recorded 2026-09-15

Founded 2015 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedCalgary, AB, Canada
Pricing evidenceA pricing page was detected
Maturity: Not assessed · 4 of 6 areas documented

Source-based assessment · automated evidence rules

The homepage contains prelaunch or closure language; availability needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yearpricing page observedrecent publishing observed
startup.observe Directory coverage · Sources & method