This Startup Wants to Catch Bad Welds in Real Time — Before the Bead Even Cools

Sonibel Instruments, a Vancouver-based startup founded by University of British Columbia graduates, has raised $1.6 million in pre-seed funding to bring real-time weld inspection to industries where defect detection currently takes days. 

The technology is built around acoustic sensing. A device mounted on the welding torch picks up high-frequency sound as molten metal meets the weld puddle. Variations in vibration frequency point to specific defect types — porosity, insufficient fusion, penetration problems. The AI processes audio continuously and flags defective welds before the bead completes.

The target market includes shipbuilding, energy infrastructure, and heavy construction — sectors where rework is expensive and inspection backlogs are routine. Sonibel claims its system can cut over 30% of total project costs in high-inspection environments.

Context makes the timing relevant: manufacturers are working through a $1.5 trillion order backlog with a shortage of 320,000 skilled welders. Sonibel’s pitch is that its tool makes existing workers more effective, not redundant. Current support covers semi-automatic FCAW and GMAW processes, with other welding types in the pipeline.