Sixfold has launched AI Underwriter, a technology platform designed to support insurers with underwriting analysis, risk assessment, and decision support throughout the submission process.
The launch follows Sixfold’s $30 mn Series B funding round announced earlier this year. The company said that capital would help accelerate development of the AI Underwriter and deepen its use across insurance workflows.
Brewer Lane led the round, with strategic backing from Guidewire and continued participation from Bessemer Venture Partners and Salesforce Ventures.
The capital will advance development of Sixfold’s AI Underwriter, built around autonomous agents designed to support end-to-end underwriting workflows.
The platform targets speed, consistency, and improved decision quality, shifting underwriters toward portfolio oversight, appetite refinement, and emerging risk evaluation rather than manual intake work.
Sixfold describes the platform as an underwriting agent that retains knowledge from prior submissions, broker interactions, and underwriting decisions. The system continuously learns from each insurer’s risk selection approach, portfolio strategy, and internal underwriting guidelines.
The company said it developed the AI Underwriter through three years of collaboration with major insurers. Sixfold combines broad underwriting knowledge with carrier-specific intelligence, allowing the platform to become more tailored to each insurer over time.
When a submission arrives, the AI Underwriter gathers and standardises relevant information. It identifies missing data, reviews appetite alignment, assesses portfolio suitability, and applies insights from prior underwriting activity.
The platform then produces a recommendation and explains the reasoning behind its assessment. It also proposes the next action for the human underwriter, giving teams a clearer view of what to do at the moment of decision.
Sixfold said the technology looks beyond the individual risk. It also considers broker relationships, portfolio mix, current business objectives, and the insurer’s preferred underwriting approach.
Alex Schmelkin, founder and CEO of Sixfold, said the platform was designed around what underwriters need when submissions arrive. He said underwriters do not need another digitised application, another workflow inbox, or a dashboard based on outdated data.
What they need is to understand the risk in the full context of their current book, the broker, and the guidelines, and to be presented with a clear next step,” Schmelkin said. “Right there, at the moment a decision is being made. That is what the AI Underwriter does.
Alex Schmelkin, founder and CEO of Sixfold
Sixfold provides technology to insurers in property and casualty, life, and health markets. Since its founding in 2023, the company said its systems have processed more than 1.5 mn submissions across more than 50 lines of business.
The company operates across North America, South America, the UK, Europe, and Australia. Its customer base represents about $270 bn in gross written premium and includes Skyward Specialty, Zurich, Generali GC&C, Guardian, AXIS, and New York Life.
Sixfold said customers using its technology have seen processing times fall by 50% to 97%. The company also reported hit ratio increases of at least 15% and gross written premium per underwriter growth of up to 30%.
Those efficiency gains matter because underwriting teams face heavier submission volumes, tighter service expectations, and more complex data. Sixfold argues its platform helps teams process more business while improving consistency and underwriting performance.
The AI Underwriter expands that role by taking a more active position in the workflow and supporting decisions across the full underwriting process.
Human underwriters remain responsible for oversight, professional judgement, governance, and final outcomes. Where insurers choose straight-through processing, the platform also produces quote-ready and bind-ready documentation.
At the centre of AI Underwriter sits Sixfold’s Underwriting Brain. The company describes it as an intelligence layer built from underwriting standards, professional frameworks, underwriting reasoning methods, and a curated knowledge base across industries and business classes.
Sixfold said this foundation helps insurers gain value quickly after implementation. Future learning remains specific to each carrier, allowing firms to preserve their own underwriting preferences and institutional knowledge.
Each insurer’s AI Underwriter implementation operates independently, according to Sixfold. The platform learns from that carrier’s appetite, portfolio characteristics, guidelines, and decisions, with feedback staying inside the insurer’s own environment.
Information from one carrier does not train another carrier’s system. That separation matters for insurers that want AI support without losing control over proprietary underwriting knowledge.
Sixfold worked with selected insurers using AI Underwriter on live submissions. Early use at Skyward Specialty showed the platform completed much of the analysis needed for submission review, allowing underwriters to focus on higher-value decisions.
Sixfold said adoption among underwriting teams has exceeded 90% of expected users. The company attributes that result to system-level compatibility and flexibility around the degree of autonomy insurers assign to the technology.
Sixfold helps the insurer quote risks in minutes rather than days, or sometimes weeks. He said the product was built with underwriters and shaped by how the job works in practice.
According to Beinsure analysts, Sixfold’s launch shows where insurance AI is moving next. The market is shifting from extraction and summarisation toward decision support that understands portfolio context, broker relationships, underwriting appetite, and governance requirements.
For insurers, the value sits in faster triage, better consistency, and institutional knowledge that stays inside the carrier rather than disappearing across inboxes and spreadsheets.
