Selling SDKs in the era of many Claudes | Steve Ruiz from @tldraw

19 Feb 2026 · 99 min
1:39:20

In this interview, Steve Ruiz, founder of tldraw, discusses the strategic and technical dimensions of building and selling a source‑available SDK in a landscape dominated by AI‑assisted development. He explains how offering a self‑hostable SDK bridges the gap between commercial SaaS and open‑source, providing data‑sovereignty for customers while giving the company valuable feedback on feature priorities. Ruiz contrasts the SDK model with traditional self‑hosted applications, noting that an SDK is architected from the start for third‑party extensions, whereas most self‑hosted apps are not. He describes the shift in customer demand from GDPR‑driven data‑privacy concerns to AI‑driven internal tooling, where companies need full control over the canvas API to integrate with agents, CRMs, and knowledge bases. The conversation covers performance engineering efforts in tldraw—moving overlay rendering to a native canvas, replacing lodash set comparisons, and compressing point data with 16‑bit floats—to achieve 100‑120 fps on large boards. Ruiz also shares his experiments with hardware (Android Daylight tablet, e‑ink devices) and the desire for a “mostly” product that ships as source code meant to be finished by the buyer. He highlights the emerging use‑cases of spatial AI agents (“fairies”) on the canvas for collaborative brainstorming, tutoring, and code‑to‑diagram workflows, and points listeners to starter kits, the tldraw.dev site, and upcoming masterclass events. The interview wraps up with reflections on community engagement, licensing, and the future of SDK domination in a world where developers increasingly demand sovereignty and AI‑enhanced tooling.

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