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Stage 2 Capital Closes $100 Million Across Two Funds to Back B2B AI Startups

Reported by citybiz
Nov 10, 2026· 3 min read
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Key Takeaways
  • • Stage 2 Capital, a Boston-based venture firm focused on early-stage B2B technology companies, has closed $100 million across Venture Fund IV and Catalyst IV, according to citybiz.
  • • Venture Fund IV will write checks of $2 million to $5 million, while Catalyst IV will provide $200,000 pre-seed checks, with both funds investing from pre-seed through Series A.
  • • The firm is rolling out an AI-powered Model Context Protocol (MCP) agent that connects portfolio founders with a network of more than 1,000 go-to-market professionals drawn from companies including OpenAI, Anthropic, Databricks, ElevenLabs, Lovable and SpaceX.
  • • The closings follow four recent portfolio exits, including Momentum's acquisition by Salesforce, Steelhead's acquisition by Mainsail, Versori's acquisition by Avalara and PSG's majority investment in Order.co.
  • • The firm did not disclose the individual sizes of either fund or the expected number of portfolio companies.
Summary
Stage 2 Capital, a Boston-based venture capital firm specializing in early-stage business-to-business technology companies, has closed $100 million across its Venture Fund IV and Catalyst IV, according to citybiz. The two vehicles will support investments from pre-seed through Series A. Venture Fund IV will make investments ranging from $2 million to $5 million, while Catalyst IV will provide $200,000 checks to pre-seed companies, frequently as part of their first institutional financing rounds. The firm did not disclose the individual sizes of either fund or the number of companies it expects to back.

Alongside the closings, Stage 2 is integrating an AI-powered Model Context Protocol (MCP) agent into its operations. The agent is designed to match portfolio companies with operators who have addressed similar business challenges, allowing founders to obtain guidance without relying exclusively on traditional introductions through venture partners. The underlying network includes more than 1,000 go-to-market professionals with experience spanning sales, marketing, customer success, revenue operations, partnerships and engineering, drawn from technology companies such as OpenAI, Anthropic, Databricks, ElevenLabs, Lovable and SpaceX. Co-founder and managing partner Jay Po said the firm can now "more easily surface the collective expertise, experience, and connections across our LP network."

The firm's investment model pairs a venture investment partner with a partner experienced in go-to-market operations to help portfolio companies develop repeatable revenue models. Its approach also incorporates The Science of Scaling, a framework developed by co-founder and managing partner Mark Roberge that assesses when startups are ready to accelerate growth and how quickly they should expand. Roberge said the framework is intended to base expansion decisions on measurable business performance rather than assumptions.

The new closings follow four recent portfolio exits. Stage 2 has already begun deploying capital from the new funds into AI-focused businesses including Letter.ai, Qualitate and Axle. The firm previously led Letter.ai's $10.6 million Series A, and the company raised a $40 million Series B led by Battery Ventures four months later. Ashley Wilson, co-founder of Momentum, said Stage 2 supported the company from its Series A through subsequent growth, including introductions to prospective customers and experienced operators.

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citybiz Stage 2 Capital Closes $100 Million Across Two Funds to Back B2B AI Startups