3 VCs and 1 funds investing in APIs
Principal
Craft Ventures
Check: No personal check-size range is published. His disclosed Craft investments include seed and Series A rounds, while his earlier Figma work included advising and investing in PLG SaaS from pre-seed through Series C; these are stage indicators, not personal check limits.
Sean backs technically ambitious design, developer, and bottom-up software that gives professionals greater control rather than reducing their work to generic automation. His Figma experience informs a patient PLG lens: build a deeply integrated product, let self-serve usage and customer data reveal the enterprise motion, and add sales at the right moment. Recent creative-AI work emphasizes open ecosystems, programmable workflows, proprietary formats or data, and durable orchestration layers that persist as underlying models change.
Partner
Craft Ventures
Check: No Mike-specific check range is public. Craft's official portfolio attributes angel/seed, venture and growth investments to him, but financing totals and round labels are not his check size. Confirm vehicle, ownership target, reserves and lead appetite directly.
Mike invests in enterprise software and AI products that deliver fast, legible value to an end user and can expand from bottom-up adoption into durable enterprise systems. His work links product architecture to buying behavior: a focused AI stack, proprietary retrieval and data access, excellent productization, a clear ideal customer profile and a repeatable go-to-market motion are more important than a broad market map or generic AI label.
Partner
Craft Ventures
Check: Firm-level public estimate: $500K-$3M at Seed, $3M-$10M+ at Series A/B, and $10M+ at Growth
Marg invests in generative AI, APIs, and enterprise AI agents, pairing an enterprise-buyer lens with deep go-to-market operating experience. His writing argues that AI markets should not be treated as uniformly attractive: durable winners need a concrete enterprise ICP, budget, renewal potential, traction, and a minimum viable stack that creates measurable employee or product value.