# Miter raises $40M Series B to build AI-native construction OS

Digest AI · Enterprise & Industry · published 2026-09-30T10:13:00Z

Canonical: https://digestai.news/story/miter-raises-40m-series-b-to-build-ai-native-construction-os

## Summary

Miter, a San Francisco-based startup, secured a $40 million Series B round led by Battery Ventures, with participation from Bessemer Venture Partners and Coatue. The funding brings its total capital to $78 million and aims to accelerate its mission to replace construction’s fragmented software stack—called a ‘Frankenstack’—with an AI-native operating system integrating payroll, field operations, compliance, and job-costing into one platform.

The company claims over 2,000 contractors now use its system, with customer growth tripling since its Series A in May 2025. Roughly 2% of U.S. construction workers are paid through Miter, including major firms like Clayco and Haugland Group. Miter’s AI extracts structured data from invoices, receipts, and field notes, automating workflows and reducing delays between jobsite activity and back-office visibility. The $40M will fund expansion of AI capabilities, engineering teams in San Francisco and New York, and go-to-market efforts across the U.S. The startup was co-founded by CEO Connor Watumull and Tobin Paxton.

## Key points

- Miter raised $40M Series B, led by Battery Ventures, with Bessemer and Coatue participating
- Over 2,000 contractors use its AI-native OS, with 2% of U.S. construction workers paid through it
- AI extracts data from invoices, receipts, and field notes to automate payroll, compliance, and job-costing

## Why it matters

Miter’s AI-native OS targets construction’s fragmented software stack, promising to streamline payroll, compliance, and field operations for contractors.

## Sources

1. [Miter Raises $40M Series B to Replace Construction’s ‘Frankenstack’ with an AI-Native Operating System](https://unite.ai/miter-raises-40m-series-b-to-replace-constructions-frankenstack-with-an-ai-native-operating-system) (Unite.AI, 2026-09-30)

## Cite

Digest AI, "Miter raises $40M Series B to build AI-native construction OS", 30 September 2026, https://digestai.news/story/miter-raises-40m-series-b-to-build-ai-native-construction-os

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